Veritas™ Cluster Server Administrator'

Veritas™ Cluster Server
Administrator's Guide
Windows Server 2008 (x64), Windows
Server 2008 R2 (x64)
6.0.1
May 2016
Veritas™ Cluster Server Administrator’s Guide
The software described in this book is furnished under a license agreement and may be used
only in accordance with the terms of the agreement.
Version: 6.0.1
Document version: 6.0.1. Rev 4
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Contents
Technical Support ............................................................................................... 4
Section 1
Clustering concepts and terminology ............. 25
Chapter 1
Introducing Veritas Cluster Server .................................. 26
About Veritas Cluster Server ...........................................................
How VCS detects failure ..........................................................
How VCS ensures application availability ....................................
About cluster control guidelines .......................................................
Defined start, stop, and monitor procedures .................................
Ability to restart the application in a known state ...........................
External data storage ..............................................................
Licensing and host name issues ................................................
About the physical components of VCS .............................................
About VCS nodes ...................................................................
About shared storage ..............................................................
About networking ...................................................................
Logical components of VCS ............................................................
About resources and resource dependencies ...............................
Categories of resources ...........................................................
About resource types ..............................................................
About service groups ..............................................................
Types of service groups ...........................................................
About the ClusterService group .................................................
About agents in VCS ...............................................................
About agent functions ..............................................................
Agent classifications ...............................................................
VCS agent framework .............................................................
About cluster control, communications, and membership ................
About security services ............................................................
Components for administering VCS ............................................
Putting the pieces together .............................................................
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Chapter 2
About cluster topologies .................................................... 44
Basic failover configurations ..........................................................
Asymmetric or active / passive configuration ................................
Symmetric or active / active configuration ....................................
About N-to-1 configuration ........................................................
About advanced failover configurations .............................................
About the N + 1 configuration ....................................................
About the N-to-N configuration ..................................................
Cluster topologies and storage configurations ....................................
About basic shared storage cluster ............................................
About campus, or metropolitan, shared storage cluster ..................
About shared nothing clusters ...................................................
About replicated data clusters ...................................................
About global clusters ...............................................................
Chapter 3
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VCS configuration concepts .............................................. 54
About configuring VCS ..................................................................
VCS configuration language ...........................................................
About the main.cf file .....................................................................
About the SystemList attribute ...................................................
Initial configuration ..................................................................
Including multiple .cf files in main.cf ............................................
About the types.cf file ....................................................................
About VCS attributes .....................................................................
About attribute data types ........................................................
About attribute dimensions .......................................................
About attributes and cluster objects ............................................
Localizable attributes ..............................................................
Attribute scope across systems: global and local attributes .............
About attribute life: temporary attributes ......................................
Size limitations for VCS objects .................................................
VCS keywords and reserved words ..................................................
VCS environment variables ............................................................
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Section 2
Administration - Putting VCS to work ............. 69
Chapter 4
About the VCS user privilege model ................................ 70
About VCS user privileges and roles ................................................
VCS privilege levels ................................................................
User roles in VCS ...................................................................
Hierarchy in VCS roles ............................................................
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User privileges for CLI commands .............................................
User privileges in global clusters ................................................
User privileges for clusters that run in secure mode .......................
How administrators assign roles to users ...........................................
User privileges for OS user groups for clusters running in secure
mode ...................................................................................
VCS privileges for users with multiple roles ........................................
Chapter 5
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Getting started with VCS ................................................... 77
Configuring the cluster using the Cluster Configuration Wizard ..............
Configuring notification ............................................................
Configuring Wide-Area Connector process for global
clusters ..........................................................................
About configuring a cluster from the command line ..............................
About preparing for a silent configuration .....................................
Running the silent configuration utility .........................................
Chapter 6
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Administering the cluster from Cluster Manager
(Java console) ............................................................... 100
About the Cluster Manager (Java Console) ......................................
Getting started prerequisites .........................................................
Starting Cluster Manager (Java console) ...................................
Components of the Java Console ...................................................
Icons in the Java Console .......................................................
About Cluster Monitor ..................................................................
Cluster monitor toolbar ...........................................................
About cluster monitor panels ...................................................
Status of the cluster connection with Cluster Monitor ....................
Monitoring VCS objects with Cluster Monitor ..............................
Expanding and collapsing the Cluster Monitor display ..................
Customizing the Cluster Manager display ..................................
About Cluster Explorer .................................................................
Cluster Explorer toolbar .........................................................
Cluster Explorer configuration tree ...........................................
Cluster Explorer view panel ....................................................
Status view ..........................................................................
Properties view ....................................................................
Service Group view ...............................................................
Resource view .....................................................................
Moving and linking icons in Service Group and Resource
views ...........................................................................
Zooming in on Service Group and Resource views ......................
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System Connectivity view ....................................................... 120
Remote Cluster Status view .................................................... 121
Accessing additional features of the Java Console ............................. 122
Template view ...................................................................... 122
System Manager .................................................................. 123
User Manager ...................................................................... 123
Command Center ................................................................. 124
Configuration wizard .............................................................. 124
Notifier Resource Configuration wizard ...................................... 125
Remote Group Resource Configuration Wizard ........................... 125
Cluster query ....................................................................... 125
Logs .................................................................................. 126
Server and user credentials .................................................... 127
Administering Cluster Monitor ........................................................ 128
Configuring a new cluster panel ............................................... 128
Modifying a cluster panel configuration ...................................... 129
Logging on to a cluster and logging off ...................................... 129
Administering user profiles ............................................................ 131
Adding a user ...................................................................... 132
Deleting a user ..................................................................... 132
Changing a user password ..................................................... 133
Changing a user privilege ....................................................... 134
Assigning privileges for OS user groups for clusters running in
secure mode ................................................................. 134
Administering service groups ........................................................ 135
Adding a service group .......................................................... 135
Deleting a service group ......................................................... 138
Bringing a service group online ................................................ 139
Taking a service group offline .................................................. 140
Switching a service group ....................................................... 141
Freezing a service group ........................................................ 142
Unfreezing a service group ..................................................... 143
Enabling a service group ........................................................ 143
Disabling a service group ....................................................... 144
Autoenabling a service group .................................................. 144
Flushing a service group ........................................................ 145
Linking service groups ........................................................... 146
Unlinking service groups ........................................................ 147
Managing systems for a service group ...................................... 148
Creating service groups with the configuration wizard ................... 149
Administering resources ............................................................... 152
Adding a resource ................................................................ 152
Adding a RemoteGroup resource from the Java Console .............. 154
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Deleting a resource ...............................................................
Bringing a resource online ......................................................
Taking a resource offline ........................................................
Taking a resource offline and propagating the command ...............
Probing a resource ...............................................................
Overriding resource type static attributes ...................................
Enabling resources in a service group .......................................
Disabling resources in a service group ......................................
Clearing a resource ...............................................................
Linking resources .................................................................
Unlinking resources ..............................................................
Invoking a resource action ......................................................
Refreshing the ResourceInfo attribute .......................................
Clearing the ResourceInfo attribute ..........................................
Importing resource types ........................................................
Running HA fire drill from the Java Console ...............................
Administering systems .................................................................
Adding a system ...................................................................
Deleting a system .................................................................
Freezing a system ................................................................
Unfreezing a system ..............................................................
Administering clusters ..................................................................
Opening a cluster configuration ...............................................
Saving a cluster configuration ..................................................
Saving and closing a cluster configuration ..................................
Running commands ....................................................................
Editing attributes .........................................................................
Querying the cluster configuration ..................................................
Setting up VCS event notification by using the Notifier wizard ..............
Administering logs ......................................................................
Customizing the log display ....................................................
Resetting the log display ........................................................
Monitoring alerts ...................................................................
Administering VCS Simulator ........................................................
Chapter 7
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Administering the cluster from the command
line .................................................................................. 181
About administering VCS from the command line ..............................
Symbols used in the VCS command syntax ...............................
How VCS identifies the local system .........................................
About specifying values preceded by a dash (-) ..........................
About the -modify option ........................................................
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Encrypting VCS passwords ..................................................... 184
Encrypting agent passwords ................................................... 184
Starting VCS .............................................................................. 185
Stopping the VCS engine and related processes ............................... 186
About stopping VCS without the -force option ............................. 187
About stopping VCS with options other than the -force
option ........................................................................... 187
About controlling the hastop behavior by using the
EngineShutdown attribute ................................................. 187
Additional considerations for stopping VCS ................................ 188
About managing VCS configuration files .......................................... 188
About the hacf utility .............................................................. 189
About multiple versions of .cf files ............................................ 189
Verifying a configuration ......................................................... 189
Scheduling automatic backups for VCS configuration files ............. 189
Saving a configuration ........................................................... 190
Setting the configuration to read or write .................................... 190
Displaying configuration files in the correct format ....................... 191
About managing VCS users from the command line ........................... 191
Adding a user ...................................................................... 191
Assigning and removing user privileges ..................................... 193
Modifying a user ................................................................... 194
Deleting a user ..................................................................... 194
Displaying a user .................................................................. 195
About querying VCS .................................................................... 195
Querying service groups ........................................................ 195
Querying resources ............................................................... 196
Querying resource types ........................................................ 197
Querying agents ................................................................... 198
Querying systems ................................................................. 198
Querying clusters .................................................................. 199
Querying status .................................................................... 199
Querying log data files (LDFs) ................................................. 200
Using conditional statements to query VCS objects ...................... 202
About administering service groups ................................................ 203
Adding and deleting service groups .......................................... 203
Modifying service group attributes ............................................ 203
Bringing service groups online ................................................. 205
Taking service groups offline ................................................... 206
Switching service groups ........................................................ 206
Freezing and unfreezing service groups .................................... 207
Enabling and disabling service groups ...................................... 207
Clearing faulted resources in a service group ............................. 208
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Linking and unlinking service groups ........................................
Administering agents ...................................................................
About administering resources ......................................................
About adding resources .........................................................
Adding resources .................................................................
Deleting resources ................................................................
Adding, deleting, and modifying resource attributes .....................
Defining attributes as local ......................................................
Linking and unlinking resources ...............................................
Bringing resources online .......................................................
Taking resources offline .........................................................
Probing a resource ...............................................................
Clearing a resource ...............................................................
About administering resource types ................................................
Adding, deleting, and modifying resource types ...........................
Overriding resource type static attributes ...................................
Administering systems .................................................................
About administering clusters .........................................................
Retrieving version information .................................................
Using the -wait option in scripts that use VCS commands ...................
About administering simulated clusters from the command line ............
Chapter 8
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Configuring resources and applications in VCS .......... 223
About configuring resources and applications ...................................
Windows Server 2008 and 2008 R2 considerations .....................
About Virtual Business Services ....................................................
Features of Virtual Business Services .......................................
Sample Virtual Business Service configuration ............................
About Intelligent Resource Monitoring (IMF) .....................................
VCS changes to support IMF ..................................................
VCS agents that support IMF ..................................................
How IMF works ....................................................................
How to enable IMF ................................................................
How to disable IMF ...............................................................
Recommended settings .........................................................
About fast failover .......................................................................
VCS changes for fast failover ..................................................
Enabling fast failover for disk groups .........................................
How VCS monitors storage components ..........................................
Shared storage—if you use NetApp filers ...................................
Shared storage—if you use SFW to manage cluster dynamic disk
groups ..........................................................................
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Shared storage—if you use Windows LDM to manage shared
disks ............................................................................
Non-shared storage—if you use SFW to manage dynamic disk
groups ..........................................................................
Non-shared storage—if you use Windows LDM to manage local
disks ............................................................................
Non-shared storage—if you use VMware storage ........................
About storage configuration ..........................................................
About managing storage using Windows Logical Disk
Manager .......................................................................
About managing storage in a Network Appliance storage
environment ..................................................................
About managing shared storage using Storage Foundation for
Windows .......................................................................
Managing storage using VMware virtual disks .............................
About configuring network resources ..............................................
About configuring IP addresses on the systems ..........................
About configuring virtual computer names ..................................
About configuring file shares .........................................................
Before you configure a file share service group ...........................
Configuring file shares using the wizard .....................................
Modifying a file share service group using the wizard ...................
Deleting a file share service group using the wizard .....................
Creating non-scoped file shares configured with VCS ...................
Making non-scoped file shares accessible while using virtual server
name or IP address if NetBIOS and WINS are disabled ..........
About configuring file shares with multiple subdirectories ..............
About configuring print shares .......................................................
Before you configure a print share service group .........................
Configuring a print share service group using the wizard ...............
Modifying a print share service group using the wizard .................
Migrating existing printers to a VCS cluster configuration ..............
Deleting a print share service group using the wizard ...................
About configuring IIS sites ............................................................
Before you configure an IIS service group ..................................
Fixing the IPv6 address configuration for FTP sites ......................
Installing IIS 7.0 on Windows Server Core .................................
Configuring an IIS service group using the wizard ........................
Modifying an IIS service group using the wizard ..........................
Deleting an IIS service group using the wizard ............................
About configuring services ............................................................
About configuring a service using the GenericService agent ..........
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Before you configure a service using the GenericService
agent ........................................................................... 295
Configuring a service using the GenericService agent .................. 296
About configuring a service using the ServiceMonitor agent ........... 297
Before you configure a service using the ServiceMonitor
agent ........................................................................... 298
Configuring a service using the ServiceMonitor agent ................... 298
About configuring processes ......................................................... 299
Before you configure processes ............................................... 299
Configuring processes using the Process agent .......................... 299
About configuring Microsoft Message Queuing (MSMQ) .................... 300
Before you configure the MSMQ service group ........................... 301
Configuring the MSMQ resource using the command-line
utility ............................................................................ 302
Configuring the MSMQ service group using the wizard ................. 304
About configuring the infrastructure and support agents ...................... 310
About configuring notification .................................................. 310
Configuring registry replication ................................................ 310
Configuring a proxy resource .................................................. 313
Configuring a phantom resource .............................................. 314
Configuring file resources ....................................................... 314
Configuring a RemoteGroup resource ....................................... 314
About configuring applications using the Application Configuration
Wizard ................................................................................ 315
Before you configure service groups using the Application
Configuration wizard ........................................................ 316
Adding resources to a service group ......................................... 317
Configuring service groups using the Application Configuration
Wizard .......................................................................... 327
Modifying an application service group ...................................... 328
Deleting resources from a service group .................................... 330
Deleting an application service group ........................................ 331
Configuring the service group in a non-shared storage
environment ........................................................................ 332
Setting the timeout duration for which the VMNSDg agent waits
for all the disks to arrive before importing the disk group ......... 333
About the VCS Application Manager utility ....................................... 335
Managing applications in virtual server context ........................... 335
About testing resource failover using virtual fire drills .......................... 336
About virtual fire drills ............................................................ 337
About infrastructure checks and fixes for supported agents ........... 337
About running a virtual fire drill ................................................ 338
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Chapter 9
Modifying the cluster configuration .............................. 339
About modifying the cluster configuration .........................................
Adding nodes to a cluster .............................................................
Removing nodes from a cluster .....................................................
Reconfiguring a cluster ................................................................
Configuring single sign-on for the cluster manually ............................
Configuring the ClusterService group ..............................................
Configuring notification ..........................................................
Configuring the wide-area connector process for global
clusters .........................................................................
Deleting a cluster configuration ......................................................
Chapter 10
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Predicting VCS behavior using VCS Simulator ............ 359
About VCS Simulator ................................................................... 359
Simulator ports ........................................................................... 360
Administering VCS Simulator from the Java Console ......................... 361
Starting VCS Simulator from the Java Console ........................... 362
Creating a simulated cluster .................................................... 362
Adding VCS type definitions .................................................... 363
Deleting a cluster .................................................................. 364
Starting a simulated cluster ..................................................... 364
Verifying a simulated cluster configuration .................................. 364
Simulating a global cluster configuration .................................... 365
Bringing a system up ............................................................. 365
Powering off a system ........................................................... 366
Saving the offline configuration ................................................ 366
Simulating a resource fault ..................................................... 366
Simulating cluster faults in global clusters .................................. 366
Simulating failed fire drills ....................................................... 367
Administering VCS Simulator from the command line interface ............. 368
Starting VCS Simulator from the command line interface .............. 368
Administering simulated clusters from the command line ............... 371
Section 3
Administration - Beyond the basics ............... 373
Chapter 11
Controlling VCS behavior ................................................. 374
VCS behavior on resource faults ....................................................
Critical and non-critical resources .............................................
VCS behavior diagrams .........................................................
About controlling VCS behavior at the service group level ...................
About the AutoRestart attribute ................................................
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About controlling failover on service group or system faults ...........
About defining failover policies ................................................
About system zones ..............................................................
Load-based autostart ............................................................
About freezing service groups .................................................
About controlling Clean behavior on resource faults .....................
Clearing resources in the ADMIN_WAIT state .............................
About controlling fault propagation ...........................................
Customized behavior diagrams ...............................................
VCS behavior for resources that support the intentional offline
functionality ...................................................................
About controlling VCS behavior at the resource level .........................
Resource type attributes that control resource behavior ................
How VCS handles resource faults ............................................
VCS behavior after a resource is declared faulted .......................
About disabling resources ......................................................
Changing agent file paths and binaries ............................................
Service group workload management .............................................
About enabling service group workload management ...................
System capacity and service group load ....................................
System limits and service group prerequisites .............................
About capacity and limits ........................................................
Sample configurations depicting workload management .....................
System and Service group definitions .......................................
Sample configuration: Basic four-node cluster ............................
Sample configuration: Complex four-node cluster ........................
Sample configuration: Server consolidation ................................
Chapter 12
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The role of service group dependencies ....................... 415
About service group dependencies .................................................
About dependency links .........................................................
About dependency limitations ..................................................
Service group dependency configurations ........................................
About failover parent / failover child ..........................................
Frequently asked questions about group dependencies ......................
About linking service groups .........................................................
VCS behavior with service group dependencies ................................
Online operations in group dependencies ..................................
Offline operations in group dependencies ..................................
Switch operations in group dependencies ..................................
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Chapter 13
VCS event notification ...................................................... 433
About VCS event notification .........................................................
Event messages and severity levels .........................................
About persistent and replicated message queue .........................
How HAD deletes messages ...................................................
Components of VCS event notification ............................................
About the notifier process .......................................................
About the hanotify utility .........................................................
About VCS events and traps .........................................................
Events and traps for clusters ...................................................
Events and traps for agents ....................................................
Events and traps for resources ................................................
Events and traps for systems ..................................................
Events and traps for service groups ..........................................
SNMP-specific files ...............................................................
Trap variables in VCS MIB ......................................................
About monitoring aggregate events ................................................
How to detect service group failover .........................................
How to detect service group switch ...........................................
About configuring notification ........................................................
Chapter 14
433
435
435
435
436
436
437
438
438
439
439
441
442
443
443
446
446
446
446
VCS event triggers ............................................................. 448
About VCS event triggers .............................................................
Using event triggers ....................................................................
List of event triggers ....................................................................
About the dumptunables trigger ...............................................
About the injeopardy event trigger ............................................
About the loadwarning event trigger ..........................................
About the nofailover event trigger .............................................
About the postoffline event trigger ............................................
About the postonline event trigger ............................................
About the preonline event trigger .............................................
About the resadminwait event trigger ........................................
About the resfault event trigger ................................................
About the resnotoff event trigger ..............................................
About the resrestart event trigger .............................................
About the resstatechange event trigger .....................................
About the sysoffline event trigger .............................................
About the unable_to_restart_agent event trigger .........................
About the unable_to_restart_had event trigger ............................
About the violation event trigger ...............................................
448
449
449
449
450
450
451
452
452
452
453
454
455
457
457
459
459
460
460
18
Contents
Section 4
Cluster configurations for disaster
recovery ..................................................................... 462
Chapter 15
Connecting clusters–Creating global clusters ............ 463
How VCS global clusters work .......................................................
VCS global clusters: The building blocks .........................................
Visualization of remote cluster objects .......................................
About global service groups ....................................................
About global cluster management ............................................
About serialization–The Authority attribute .................................
About resiliency and "Right of way" ..........................................
VCS agents to manage wide-area failover .................................
About the Steward process: Split-brain in two-cluster global
clusters .........................................................................
Secure communication in global clusters ...................................
Prerequisites for global clusters .....................................................
Prerequisites for cluster setup .................................................
Prerequisites for application setup ............................................
Prerequisites for wide-area heartbeats ......................................
Prerequisites for ClusterService group ......................................
Prerequisites for replication setup ............................................
Prerequisites for clusters running in secure mode ........................
Setting up a global cluster ............................................................
Preparing the application for the global environment ....................
Configuring the ClusterService group ........................................
Configuring replication resources in VCS ...................................
Linking the application and replication service groups ..................
Configuring the second cluster ................................................
Linking clusters ....................................................................
Configuring the Steward process (optional) ................................
Stopping the Steward process .................................................
Configuring the global service group .........................................
About cluster faults .....................................................................
About the type of failure .........................................................
Switching the service group back to the primary ..........................
About setting up a disaster recovery fire drill .....................................
About creating and configuring the fire drill service group
manually .......................................................................
Multi-tiered application support using the RemoteGroup agent in a
global environment ...............................................................
Test scenario for a multi-tiered environment .....................................
463
464
465
465
465
467
468
468
468
469
470
470
470
471
471
471
472
472
474
474
475
477
478
478
479
482
483
484
484
485
485
486
490
491
19
Contents
About
About
About
About
Chapter 16
the
the
the
the
main.cf
main.cf
main.cf
main.cf
file
file
file
file
for
for
for
for
cluster
cluster
cluster
cluster
1
2
3
4
............................................
............................................
............................................
............................................
Administering global clusters from Cluster Manager
(Java console) ............................................................... 497
About global clusters ...................................................................
Adding a remote cluster ...............................................................
Deleting a remote cluster ..............................................................
Administering global service groups ................................................
Converting local and global groups ...........................................
Bringing a service group online in a remote cluster ......................
Taking a service group offline in a remote cluster .........................
Switching a service group to a remote cluster .............................
Administering global heartbeats .....................................................
Adding a global heartbeat .......................................................
Modifying a global heartbeat ...................................................
Deleting a global heartbeat .....................................................
Chapter 17
497
498
502
505
505
508
508
509
509
509
510
511
Administering global clusters from the command
line .................................................................................. 512
About administering global clusters from the command line .................
About global querying in a global cluster setup ..................................
Querying global cluster service groups ......................................
Querying resources across clusters ..........................................
Querying systems .................................................................
Querying clusters ..................................................................
Querying status ....................................................................
Querying heartbeats ..............................................................
Administering global service groups in a global cluster setup ...............
Administering resources in a global cluster setup ..............................
Administering clusters in global cluster setup ....................................
Managing cluster alerts in a global cluster setup ..........................
Changing the cluster name in a global cluster setup .....................
Administering heartbeats in a global cluster setup .............................
Chapter 18
492
493
494
495
512
513
513
514
516
516
518
518
520
522
522
523
524
525
Setting up replicated data clusters ............................... 527
About replicated data clusters ....................................................... 527
How VCS replicated data clusters work ........................................... 528
About setting up a replicated data cluster configuration ....................... 529
20
Contents
......................................................................................... 530
Section 5
Troubleshooting and performance ................. 531
Chapter 19
VCS performance considerations .................................. 532
How cluster components affect performance .................................... 532
How kernel components (GAB and LLT) affect performance .......... 533
If the network adapters cannot ping each other, the cluster nodes
may not get GAB membership ........................................... 533
How the VCS engine (HAD) affects performance ......................... 534
How agents affect performance ............................................... 534
How the VCS graphical user interfaces affect performance ............ 536
How cluster operations affect performance ....................................... 536
VCS performance consideration when booting a cluster system ...
5
3
7
VCS performance consideration when a resource comes
online ........................................................................... 538
VCS performance consideration when a resource goes
offline ........................................................................... 538
VCS performance consideration when a service group comes
online ........................................................................... 538
VCS performance consideration when a service group goes
offline ........................................................................... 539
VCS performance consideration when a resource fails ................. 539
VCS performance consideration when a system fails ................... 540
VCS performance consideration when a network link fails ............. 541
VCS performance consideration when a system panics ................ 541
VCS performance consideration when a service group switches
over ............................................................................. 543
VCS performance consideration when a service group fails
over ............................................................................. 544
Monitoring CPU usage ................................................................. 544
VCS agent statistics .................................................................... 545
Tracking monitor cycle times ................................................... 546
VCS attributes enabling agent statistics ..................................... 547
About VCS performance with non-HA products ................................. 548
About VCS performance with SFW ................................................. 548
Chapter 20
Troubleshooting and recovery for VCS ......................... 550
VCS message logging ................................................................. 550
VCW logs ............................................................................ 551
21
Contents
VCWsilent logs ..................................................................... 552
Solutions wizard logs ............................................................. 552
Message catalogs ................................................................. 553
Handling network failure ............................................................... 553
Disabling failover .................................................................. 554
Example of how VCS handles network failure ............................. 554
Network partitioning .............................................................. 557
When VCS shuts down a system ............................................. 558
Pre-existing network partitions ................................................. 558
Seeding of VCS clusters ........................................................ 558
Reconnecting the private network ............................................ 560
Troubleshooting VCS startup ........................................................ 560
Low Latency Transport (LLT) ................................................... 561
Group Membership Atomic Broadcast (GAB) .............................. 562
Verifying LLT, GAB, and cluster operation .................................. 562
VCS startup errors ................................................................ 569
Cluster name contains Unicode characters ................................ 571
Cluster ID is not unique over a network ..................................... 571
Troubleshooting secure clusters .................................................... 572
Troubleshooting service groups ..................................................... 573
ClusterService group configuration ........................................... 575
Troubleshooting resources ........................................................... 575
Troubleshooting notification ......................................................... 576
Troubleshooting and recovery for global clusters ............................... 577
Disaster declaration .............................................................. 577
Lost heartbeats and the inquiry mechanism ................................ 578
VCS alerts ........................................................................... 578
Troubleshooting the steward process .............................................. 580
VCS utilities ............................................................................... 581
The getcomms utility ............................................................. 581
The hagetcf utility ................................................................. 582
The NICTest utility ................................................................. 585
The VCSRegUtil utility ........................................................... 586
The havol utility .................................................................... 586
The vmgetdrive utility ............................................................. 589
Configuring the VCS HAD Helper service manually ...................... 590
Section 6
Appendixes
Appendix A
VCS user privileges—administration matrices ........... 593
.................................................................... 592
About administration matrices ....................................................... 593
Administration matrices ................................................................ 593
22
Contents
Agent Operations (haagent) ....................................................
Attribute Operations (haattr) ....................................................
Cluster Operations (haclus, haconf) ..........................................
Service group operations (hagrp) .............................................
Heartbeat operations (hahb) ...................................................
Log operations (halog) ...........................................................
Resource operations (hares) ...................................................
System operations (hasys) .....................................................
Resource type operations (hatype) ...........................................
User operations (hauser) ........................................................
Appendix B
Cluster and system states ............................................... 601
Remote cluster states ..................................................................
Examples of cluster state transitions .........................................
System states ............................................................................
Examples of system state transitions ........................................
Appendix C
601
602
603
605
VCS attributes .................................................................... 606
About attributes and their definitions ...............................................
Resource attributes .....................................................................
Resource type attributes ..............................................................
Service group attributes ...............................................................
System attributes ........................................................................
Cluster attributes ........................................................................
Heartbeat attributes (for global clusters) ..........................................
Remote cluster attributes ..............................................................
Appendix D
594
594
594
595
596
597
597
598
599
599
606
607
615
626
646
655
665
666
Configuring LLT over UDP ............................................... 671
About configuring LLT over UDP ....................................................
When to use LLT over UDP ..........................................................
LLT over UDP configuration ..........................................................
The link command in the llttab file ............................................
The set-addr command in the llttab file ......................................
Selecting UDP ports ..............................................................
Sample configuration: Direct-attached links ......................................
Sample configuration: Links crossing IP routers ................................
Issues and limitations ..................................................................
VCW does not support configuring broadcasting for UDP ..............
If the network adapters are unable to ping each other, the cluster
nodes may not get GAB membership ..................................
671
671
672
672
673
673
674
675
677
677
677
23
Contents
Appendix E
Handling concurrency violation in any-to-any
configurations .............................................................. 679
About handling concurrency violation ..............................................
Concurrency violation scenario ......................................................
About the vcsgensvc.vbs script ......................................................
Sample configuration to handle concurrency violation ........................
Notes for using scripts with the Process agent ............................
Appendix F
679
679
680
681
683
Accessibility and VCS ....................................................... 684
About accessibility in VCS ............................................................
Navigation and keyboard shortcuts .................................................
Navigation in the Java Console ................................................
Navigation in the Web console ................................................
Support for accessibility settings ....................................................
Support for assistive technologies ..................................................
684
684
684
685
685
686
Index ................................................................................................................... 687
24
Section
Clustering concepts and
terminology
■
Chapter 1. Introducing Veritas Cluster Server
■
Chapter 2. About cluster topologies
■
Chapter 3. VCS configuration concepts
1
Chapter
1
Introducing Veritas Cluster
Server
This chapter includes the following topics:
■
About Veritas Cluster Server
■
About cluster control guidelines
■
About the physical components of VCS
■
Logical components of VCS
■
Putting the pieces together
About Veritas Cluster Server
Veritas Cluster Server (VCS) from Symantec connects multiple, independent systems
into a management framework for increased availability. Each system, or node,
runs its own operating system and cooperates at the software level to form a cluster.
VCS links commodity hardware with intelligent software to provide application
failover and control. When a node or a monitored application fails, other nodes can
take predefined actions to take over and bring up services elsewhere in the cluster.
How VCS detects failure
VCS detects failure of an application by issuing specific commands, tests, or scripts
to monitor the overall health of an application. VCS also determines the health of
underlying resources by supporting the applications such as file systems and network
interfaces.
VCS uses a redundant network heartbeat to differentiate between the loss of a
system and the loss of communication between systems. VCS can also use
Introducing Veritas Cluster Server
About Veritas Cluster Server
SCSI3-based membership coordination and data protection for detecting failure on
a node and on fencing.
See “About cluster control, communications, and membership” on page 38.
How VCS ensures application availability
When VCS detects an application or node failure, VCS brings application services
up on a different node in a cluster.
Figure 1-1 shows how VCS virtualizes IP addresses and system names, so client
systems continue to access the application and are unaware of which server they
use.
Figure 1-1
IP Address
Application
Storage
VCS virtualizes IP addresses and system names to ensure application
availability
Storage
For example, in a two-node cluster consisting of db-server1 and db-server2, a virtual
address may be called db-server. Clients access db-server and are unaware of
which physical server hosts the db-server.
About switchover and failover
Switchover and failover are the processes of bringing up application services on a
different node in a cluster by VCS. The difference between the two processes is
as follows:
Switchover
A switchover is an orderly shutdown of an application and its supporting
resources on one server and a controlled startup on another server.
Failover
A failover is similar to a switchover, except the ordered shutdown of
applications on the original node may not be possible due to failure of
hardware or services, so the services are started on another node.
27
Introducing Veritas Cluster Server
About Veritas Cluster Server
SCSI3-based membership coordination and data protection for detecting failure on
a node and on fencing.
See “About cluster control, communications, and membership” on page 38.
How VCS ensures application availability
When VCS detects an application or node failure, VCS brings application services
up on a different node in a cluster.
Figure 1-1 shows how VCS virtualizes IP addresses and system names, so client
systems continue to access the application and are unaware of which server they
use.
Figure 1-1
IP Address
Application
Storage
VCS virtualizes IP addresses and system names to ensure application
availability
Storage
For example, in a two-node cluster consisting of db-server1 and db-server2, a virtual
address may be called db-server. Clients access db-server and are unaware of
which physical server hosts the db-server.
About switchover and failover
Switchover and failover are the processes of bringing up application services on a
different node in a cluster by VCS. The difference between the two processes is
as follows:
Switchover
A switchover is an orderly shutdown of an application and its supporting
resources on one server and a controlled startup on another server.
Failover
A failover is similar to a switchover, except the ordered shutdown of
applications on the original node may not be possible due to failure of
hardware or services, so the services are started on another node.
27
Introducing Veritas Cluster Server
About cluster control guidelines
About cluster control guidelines
Most applications can be placed under cluster control provided the following
guidelines are met:
■
Defined start, stop, and monitor procedures
See “ Defined start, stop, and monitor procedures” on page 28.
■
Ability to restart in a known state
See “ Ability to restart the application in a known state” on page 29.
■
Ability to store required data on shared disks
See “ External data storage” on page 29.
■
Adherence to license requirements and host name dependencies
See “ Licensing and host name issues” on page 30.
Defined start, stop, and monitor procedures
The following table describes the defined procedures for starting, stopping, and
monitoring the application to be clustered:
Start procedure
The application must have a command to start it and all resources it
may require. VCS brings up the required resources in a specific order,
then brings up the application by using the defined start procedure.
For example, to start an Oracle database, VCS must know which Oracle
utility to call, such as sqlplus. VCS must also know the Oracle user,
instance ID, Oracle home directory, and the pfile.
Stop procedure
An individual instance of the application must be capable of being
stopped without affecting other instances.
For example, You cannot kill all httpd processes on a Web server
because it also stops other Web servers.
If VCS cannot stop an application cleanly, it may call for a more forceful
method, like a kill signal. After a forced stop, a clean-up procedure may
be required for various process-specific and application-specific items
that may be left behind. These items include shared memory segments
or semaphores.
28
Introducing Veritas Cluster Server
About cluster control guidelines
Monitor procedure The application must have a monitor procedure that determines if the
specified application instance is healthy. The application must allow
individual monitoring of unique instances.
For example, the monitor procedure for a Web server connects to the
specified server and verifies that it serves Web pages. In a database
environment, the monitoring application can connect to the database
server and perform SQL commands to verify read and write access to
the database.
If a test closely matches what a user does, it is more successful in
discovering problems. Balance the level of monitoring by ensuring that
the application is up and by minimizing monitor overhead.
Ability to restart the application in a known state
When you take an application offline, the application must close out all tasks, store
data properly on shared disk, and exit. Stateful servers must not keep that state of
clients in memory. States should be written to shared storage to ensure proper
failover.
Commercial databases such as Oracle, Sybase, or SQL Server are good examples
of well-written, crash-tolerant applications. On any client SQL request, the client is
responsible for holding the request until it receives acknowledgement from the
server. When the server receives a request, it is placed in a special redo log file.
The database confirms that the data is saved before it sends an acknowledgement
to the client. After a server crashes, the database recovers to the last-known
committed state by mounting the data tables and by applying the redo logs. This
returns the database to the time of the crash. The client resubmits any outstanding
client requests that are unacknowledged by the server, and all others are contained
in the redo logs.
If an application cannot recover gracefully after a server crashes, it cannot run in
a cluster environment. The takeover server cannot start up because of data
corruption and other problems.
External data storage
The application must be capable of storing all required data and configuration
information on shared disks. The exception to this rule is a true shared nothing
cluster.
See “About shared nothing clusters” on page 51.
For example, set up SQL Server so that the binaries are installed on the local
system. The shared database and configuration information reside on a shared
disk.
29
Introducing Veritas Cluster Server
About the physical components of VCS
The application must also store data to disk instead of maintaining it in memory.
The takeover system must be capable of accessing all required information. This
requirement precludes the use of anything inside a single system inaccessible by
the peer. NVRAM accelerator boards and other disk caching mechanisms for
performance are acceptable, but must be done on the external array and not on
the local host.
Licensing and host name issues
The application must be capable of running on all servers that are designated as
potential hosts. This requirement means strict adherence to license requirements
and host name dependencies. A change of host names can lead to significant
management issues when multiple systems have the same host name after an
outage. To create custom scripts to modify a system host name on failover is not
recommended. Symantec recommends that you configure applications and licenses
to run properly on all hosts.
About the physical components of VCS
A VCS cluster comprises of systems that are connected with a dedicated
communications infrastructure. VCS refers to a system that is part of a cluster as
a node.
Each cluster has a unique cluster ID. Redundant cluster communication links connect
systems in a cluster.
See “About VCS nodes” on page 30.
See “About shared storage” on page 31.
See “About networking” on page 31.
About VCS nodes
VCS nodes host the service groups (managed applications and their resources).
Each system is connected to networking hardware, and usually to storage hardware
also. The systems contain components to provide resilient management of the
applications and to start and stop agents.
Nodes can be individual systems, or they can be created with domains or partitions
on enterprise-class systems or on supported virtual machines. Individual cluster
nodes each run their own operating system and possess their own boot device.
Each node must run the same operating system within a single VCS cluster.
30
Introducing Veritas Cluster Server
Logical components of VCS
About shared storage
Storage is a key resource of most applications services, and therefore most service
groups. You can start a managed application on a system that has access to its
associated data files. Therefore, a service group can only run on all systems in the
cluster if the storage is shared across all systems. In many configurations, a storage
area network (SAN) provides this requirement.
See “ Cluster topologies and storage configurations” on page 49.
About networking
Networking in the cluster is used for the following purposes:
■
Communications between the cluster nodes and the customer systems.
■
Communications between the cluster nodes.
See “About cluster control, communications, and membership” on page 38.
Logical components of VCS
VCS is comprised of several components that provide the infrastructure to cluster
an application.
See “About resources and resource dependencies” on page 32.
See “Categories of resources” on page 32.
See “About resource types” on page 33.
See “About service groups” on page 33.
See “Types of service groups” on page 34.
See “About the ClusterService group” on page 35.
See “About agents in VCS” on page 35.
See “About agent functions” on page 36.
See “ VCS agent framework” on page 38.
See “About cluster control, communications, and membership” on page 38.
See “About security services” on page 40.
See “ Components for administering VCS” on page 41.
31
Introducing Veritas Cluster Server
Logical components of VCS
About resources and resource dependencies
Resources are hardware or software entities that make up the application. Disk
groups and file systems, network interface cards (NIC), IP addresses, and
applications are a few examples of resources.
Resource dependencies indicate resources that depend on each other because of
application or operating system requirements. Resource dependencies are
graphically depicted in a hierarchy, also called a tree, where the resources higher
up (parent) depend on the resources lower down (child).
Figure 1-2 shows the hierarchy for a database application.
Sample resource dependency graph
Figure 1-2
Application requires database and IP address.
Application
Database
IP Address
File
Network
Disk Group
Resource dependencies determine the order in which resources are brought online
or taken offline. For example, you must import a disk group before volumes in the
disk group start, and volumes must start before you mount file systems. Conversely,
you must unmount file systems before volumes stop, and volumes must stop before
you deport disk groups.
A parent is brought online after each child is brought online, and this continues up
the tree, until finally the application starts. Conversely, to take a managed application
offline, VCS stops resources by beginning at the top of the hierarchy. In this example,
the application stops first, followed by the database application. Next the IP address
and file systems stop concurrently. These resources do not have any resource
dependency between them, and this continues down the tree.
Child resources must be brought online before parent resources are brought online.
Parent resources must be taken offline before child resources are taken offline. If
resources do not have parent-child interdependencies, they can be brought online
or taken offline concurrently.
Categories of resources
Different types of resources require different levels of control.
32
Introducing Veritas Cluster Server
Logical components of VCS
Table 1-1 describes the three categories of VCS resources.
Table 1-1
Categories of VCS resources
VCS resources
VCS behavior
On-Off
VCS starts and stops On-Off resources as required. For
example, VCS imports a disk group when required, and deports
it when it is no longer needed.
On-Only
VCS starts On-Only resources, but does not stop them.
For example, in the case of the FileOnOnly resource, VCS
creates the file. VCS does not delete the file if the service
group is taken offline.
Persistent
These resources cannot be brought online or taken offline.
For example, a network interface card cannot be started or
stopped, but it is required to configure an IP address. A
Persistent resource has an operation value of None. VCS
monitors Persistent resources to ensure their status and
operation. Failure of a Persistent resource triggers a service
group failover.
About resource types
VCS defines a resource type for each resource it manages. For example, you can
configure the NIC resource type to manage network interface cards. Similarly, you
can configure an IP address using the IP resource type.
VCS includes a set of predefined resources types. For each resource type, VCS
has a corresponding agent, which provides the logic to control resources.
See “About agents in VCS” on page 35.
About service groups
A service group is a virtual container that contains all the hardware and software
resources that are required to run the managed application. Service groups allow
VCS to control all the hardware and software resources of the managed application
as a single unit. When a failover occurs, resources do not fail over individually; the
entire service group fails over. If more than one service group is on a system, a
group can fail over without affecting the others.
Figure 1-3 shows a typical database service group.
33
Introducing Veritas Cluster Server
Logical components of VCS
Figure 1-3
Typical database service group
Application
File System
Disk Group
IP Address
Network
A single node can host any number of service groups, each providing a discrete
service to networked clients. If the server crashes, all service groups on that node
must be failed over elsewhere.
Service groups can be dependent on each other. For example, a managed
application might be a finance application that is dependent on a database
application. Because the managed application consists of all components that are
required to provide the service, service group dependencies create more complex
managed applications. When you use service group dependencies, the managed
application is the entire dependency tree.
See “About service group dependencies” on page 415.
Types of service groups
VCS service groups fall in three main categories: failover, parallel, and hybrid.
About failover service groups
A failover service group runs on one system in the cluster at a time. Failover groups
are used for most applications that do not support multiple systems to simultaneously
access the application’s data.
About parallel service groups
A parallel service group runs simultaneously on more than one system in the cluster.
A parallel service group is more complex than a failover group. Parallel service
groups are appropriate for applications that manage multiple application instances
that run simultaneously without data corruption.
34
Introducing Veritas Cluster Server
Logical components of VCS
About hybrid service groups
A hybrid service group is for replicated data clusters and is a combination of the
failover and parallel service groups. It behaves as a failover group within a system
zone and a parallel group across system zones.
A hybrid service group cannot fail over across system zones. VCS allows a switch
operation on a hybrid group only if both systems are within the same system zone.
If no systems exist within a zone for failover, VCS calls the nofailover trigger on the
lowest numbered node. Hybrid service groups adhere to the same rules governing
group dependencies as do parallel groups.
See “About service group dependencies” on page 415.
See “About the nofailover event trigger” on page 451.
About the ClusterService group
The ClusterService group is a special purpose service group, which contains
resources that are required by VCS components.
The group contains resources for the following items:
■
Cluster Management Console
■
Notification
■
Wide-area connector (WAC) process, which is used in global clusters
By default, the ClusterService group can fail over to any node despite restrictions
such as the node being frozen. However, if you disable the AutoAddSystemToCSG
attribute, you can control the nodes that are included in the SystemList. The
ClusterService group is the first service group to come online and cannot be
autodisabled. The ClusterService group comes online on the first node that
transitions to the running state. The VCS engine discourages the action of taking
the group offline manually.
About agents in VCS
Agents are multi-threaded processes that provide the logic to manage resources.
VCS has one agent per resource type. The agent monitors all resources of that
type; for example, a single IP agent manages all IP resources.
When the agent starts, it obtains the necessary configuration information from VCS.
It then periodically monitors the resources, and updates VCS with the resource
status.
See About resource monitoring on page ?.
35
Introducing Veritas Cluster Server
Logical components of VCS
The action to bring a resource online or take it offline differs significantly for each
resource type. For example, when you bring a disk group online, it requires importing
the disk group. But, when you bring a database online, it requires that you start the
database manager process and issue the appropriate startup commands.
VCS monitors resources when they are online and offline to ensure that they are
not started on systems where they are not supposed to run. For this reason, VCS
starts the agent for any resource that is configured to run on a system when the
cluster is started. If no resources of a particular type are configured, the agent is
not started. For example, if no Oracle resources exist in your configuration, the
Oracle agent is not started on the system.
Certain agents can identify when an application has been intentionally shut down
outside of VCS control. For agents that support this functionality, if an administrator
intentionally shuts down an application outside of VCS control, VCS does not treat
it as a fault. VCS sets the service group state as offline or partial, which depends
on the state of other resources in the service group.
This feature allows administrators to stop applications that do not cause a failover.
The feature is available for V51 agents. Agent versions are independent of VCS
versions. For example, VCS 6.0 can run V40, V50, V51, and V52 agents for
backward compatibility.
See “VCS behavior for resources that support the intentional offline functionality”
on page 383.
About agent functions
Agents carry out specific functions on resources. The functions an agent performs
are called entry points.
For details on agent functions, see the Veritas Cluster Server Agent Developer’s
Guide.
Table 1-2 describes the agent functions.
Table 1-2
Agent functions
Agent functions Role
Online
Brings a specific resource ONLINE from an OFFLINE state.
Offline
Takes a resource from an ONLINE state to an OFFLINE state.
36
Introducing Veritas Cluster Server
Logical components of VCS
Table 1-2
Agent functions (continued)
Agent functions Role
Monitor
Tests the status of a resource to determine if the resource is online or
offline.
The function runs at the following times:
■
■
■
■
During initial node startup, to probe and determine the status of all
resources on the system.
After every online and offline operation.
Periodically, to verify that the resource remains in its correct state.
Under normal circumstances, the monitor entry point is run every
60 seconds when a resource is online. The entry point is run every
300 seconds when a resource is expected to be offline.
When you probe a resource using the following command:
# hares -probe res_name -sys system_name.
Clean
Cleans up after a resource fails to come online, fails to go offline, or
fails to detect as ONLINE when resource is in an ONLINE state. The
clean entry point is designed to clean up after an application fails. The
function ensures that the host system is returned to a valid state. For
example, the clean function may remove shared memory segments or
IPC resources that are left behind by a database.
Action
Performs actions that can be completed in a short time and which are
outside the scope of traditional activities such as online and offline.
Some agents have predefined action scripts that you can run by invoking
the action function.
Info
Retrieves specific information for an online resource.
The retrieved information is stored in the resource attribute
ResourceInfo. This function is invoked periodically by the agent
framework when the resource type attribute InfoInterval is set to a
non-zero value. The InfoInterval attribute indicates the period after
which the info function must be invoked. For example, the Mount agent
may use this function to indicate the space available on the file system.
To see the updated information, you can invoke the info agent function
explicitly from the command line interface by running the following
command:
hares -refreshinfo res [-sys system] -clus cluster
| -localclus
37
Introducing Veritas Cluster Server
Logical components of VCS
Agent classifications
The different kinds of agents that work with VCS include bundled agents, enterprise
agents, and custom agents.
About bundled agents
Bundled agents are packaged with VCS. They include agents for Disk, Mount, IP,
and various other resource types.
See the Veritas Cluster Server Bundled Agents Reference Guide.
About enterprise agents
Enterprise agents control third party applications. These include agents for Oracle,
Sybase, and DB2.
See the following documentation for more information:
■
Veritas Cluster Server Agent for Oracle Installation and Configuration Guide
■
Veritas Cluster Server Agent for Sybase Installation and Configuration Guide
■
Veritas Cluster Server Agent for DB2 Installation and Configuration Guide
About custom agents
Custom agents are agents that customers or Symantec consultants develop.
Typically, agents are developed because the user requires control of an application
that the current bundled or enterprise agents do not support.
See the Veritas Cluster Server Agent Developer’s Guide.
VCS agent framework
The VCS agent framework is a set of common, predefined functions that are
compiled into each agent. These functions include the ability to connect to the VCS
engine (HAD) and to understand common configuration attributes. The agent
framework frees the developer from developing functions for the cluster; the
developer instead can focus on controlling a specific resource type.
For more information on developing agents, see the Veritas Cluster Server Agent
Developer’s Guide.
About cluster control, communications, and membership
Cluster communications ensure that VCS is continuously aware of the status of
each system’s service groups and resources. They also enable VCS to recognize
38
Introducing Veritas Cluster Server
Logical components of VCS
which systems are active members of the cluster, which have joined or left the
cluster, and which have failed.
See “About the high availability daemon (HAD)” on page 39.
See “About Group Membership Services and Atomic Broadcast (GAB)” on page 39.
See “About Low Latency Transport (LLT)” on page 40.
About the high availability daemon (HAD)
The VCS high availability daemon (HAD) runs on each system.
Also known as the VCS engine, HAD is responsible for the following functions:
■
Builds the running cluster configuration from the configuration files
■
Distributes the information when new nodes join the cluster
■
Responds to operator input
■
Takes corrective action when something fails.
The engine uses agents to monitor and manage resources. It collects information
about resource states from the agents on the local system and forwards it to all
cluster members.
The local engine also receives information from the other cluster members to update
its view of the cluster. HAD operates as a replicated state machine (RSM). The
engine that runs on each node has a completely synchronized view of the resource
status on each node. Each instance of HAD follows the same code path for corrective
action, as required.
The RSM is maintained through the use of a purpose-built communications package.
The communications package consists of the protocols Low Latency Transport
(LLT) and Group Membership Services and Atomic Broadcast (GAB).
The hashadow process monitors HAD and restarts it when required.
About Group Membership Services and Atomic Broadcast (GAB)
The Group Membership Services and Atomic Broadcast protocol (GAB) is
responsible for the following cluster membership and cluster communications
functions:
■
Cluster Membership
GAB maintains cluster membership by receiving input on the status of the
heartbeat from each node by LLT. When a system no longer receives heartbeats
from a peer, it marks the peer as DOWN and excludes the peer from the cluster.
In VCS, memberships are sets of systems participating in the cluster.
VCS has the following types of membership:
39
Introducing Veritas Cluster Server
Logical components of VCS
■
■
A regular membership includes systems that communicate with each other
across more than one network channel.
■
A jeopardy membership includes systems that have only one private
communication link.
■
A visible membership includes systems that have GAB running but the GAB
client is no longer registered with GAB.
Cluster Communications
GAB’s second function is reliable cluster communications. GAB provides
guaranteed delivery of point-to-point and broadcast messages to all nodes. The
VCS engine uses a private IOCTL (provided by GAB) to tell GAB that it is alive.
About Low Latency Transport (LLT)
VCS uses private network communications between cluster nodes for cluster
maintenance. The Low Latency Transport functions as a high-performance,
low-latency replacement for the IP stack, and is used for all cluster communications.
Symantec recommends two independent networks between all cluster nodes. These
networks provide the required redundancy in the communication path and enable
VCS to differentiate between a network failure and a system failure.
LLT has the following two major functions:
■
Traffic distribution
LLT distributes (load balances) internode communication across all available
private network links. This distribution means that all cluster communications
are evenly distributed across all private network links (maximum eight) for
performance and fault resilience. If a link fails, traffic is redirected to the remaining
links.
■
Heartbeat
LLT is responsible for sending and receiving heartbeat traffic over network links.
The Group Membership Services function of GAB uses this heartbeat to
determine cluster membership.
About security services
VCS uses the Symantec Product Authentication Service to provide secure
communication between cluster nodes. VCS uses digital certificates for
authentication and uses SSL to encrypt communication over the public network.
In secure mode:
■
VCS uses platform-based authentication.
■
VCS does not store user passwords.
40
Introducing Veritas Cluster Server
Logical components of VCS
■
All VCS users are system and domain users and are configured using
fully-qualified user names. For example, administrator@vcsdomain. VCS
provides a single sign-on mechanism, so authenticated users do not need to
sign on each time to connect to a cluster.
For secure communication, VCS components acquire credentials from the
authentication broker that is configured on the local system. In VCS 6.0 and later,
a root and authentication broker is automatically deployed on each node when a
secure cluster is configured. The acquired certificate is used during authentication
and is presented to clients for the SSL handshake.
VCS and its components specify the account name and the domain in the following
format:
■
HAD Account
name = HAD
domain = VCS_SERVICES@Cluster UUID
■
CmdServer
name = CMDSERVER
domain = VCS_SERVICES@Cluster UUID
■
Wide-area connector
name = _WAC_GCO_(systemname)
domain = HA_SERVICES@(fully_qualified_system_name)
Components for administering VCS
VCS provides several components to administer clusters.
Table 1-3 describes the components that VCS provides to administer clusters:
41
Introducing Veritas Cluster Server
Putting the pieces together
Table 1-3
VCS components to administer clusters
VCS components Description
VCS Cluster
Management
Console
A Web-based graphical user interface for monitoring and administering
the cluster.
Install the VCS Cluster Management Console on cluster nodes to
manage a single cluster.
Install the VCS Cluster Management Console on a management server
outside the cluster to manage multiple clusters.
See the Veritas Cluster Server Management Console Implementation
Guide for more information.
Veritas Operations A Web-based graphical user interface for monitoring and administering
Manager
the cluster.
Install the Veritas Operations Manager on a management server outside
the cluster to manage multiple clusters.
See the Veritas Operations Manager documentation for more
information.
Cluster Manager
(Java console)
A cross-platform Java-based graphical user interface that provides
complete administration capabilities for your cluster. The console runs
on any system inside or outside the cluster, on any operating system
that supports Java.
See “About the Cluster Manager (Java Console)” on page 101.
VCS command line The VCS command-line interface provides a comprehensive set of
interface (CLI)
commands for managing and administering the cluster.
See “About administering VCS from the command line” on page 182.
Putting the pieces together
In the following example, a two-node cluster shares directories to clients. Both
nodes are connected to shared storage, which enables them access to the
directories that are being shared. A single service group, "FileShare_Group," is
configured to fail over between System A and System B. The service group consists
of various resources, each with a different resource type.
The VCS engine, HAD, reads the configuration file, determines what agents are
required to control the resources in the service group, and starts the agents. HAD
uses resource dependencies to determine the order in which to bring the resources
online. VCS issues online commands to the corresponding agents in the correct
order.
42
Introducing Veritas Cluster Server
Putting the pieces together
Figure 1-4 shows the dependency graph for the service group FileShare_Group.
Dependency graph for the service group FileShare_Group
Figure 1-4
myshare
Lanman
ip_a
IP
FileShare
mountv_z
nic_rl20001
MountV
NIC
vmdg_0
VMDg
In this configuration, HAD starts agents for the disk group, mount, share, NIC, and
IP on all systems configured to run FileShare_Group.
The resource dependencies are configured as follows:
■
The MountV resource requires that the VMDg resource is online before you
bring it online. The FileShare resource requires that the MountV resource is
online before you bring it online.
■
The IP resource requires that the NIC resource is online before you bring it
online. The NIC resource is a persistent resource and does not need to be
started.
■
The Lanman resource requires that the FileShare and IP resources are online
before you can bring them online.
You can configure the service group to start automatically on either node in the
preceding example. It then can move or fail over to the second node on command
or automatically if the first node fails. On failover or relocation, to make the resources
offline on the first node, VCS begins at the top of the graph. When it starts them on
the second node, it begins at the bottom.
43
Chapter
2
About cluster topologies
This chapter includes the following topics:
■
Basic failover configurations
■
About advanced failover configurations
■
Cluster topologies and storage configurations
Basic failover configurations
The basic failover configurations include asymmetric, symmetric, and N-to-1.
Asymmetric or active / passive configuration
In an asymmetric configuration, an application runs on a primary, or master, server.
A dedicated redundant server is present to take over on any failure. The redundant
server is not configured to perform any other functions.
Figure 2-1 shows failover within an asymmetric cluster configuration, where a
database application is moved, or failed over, from the master to the redundant
server.
About cluster topologies
Basic failover configurations
Figure 2-1
Asymmetric failover
Before Failover
After Failover
Application
Application
This configuration is the simplest and most reliable. The redundant server is on
stand-by with full performance capability. If other applications are running, they
present no compatibility issues.
Symmetric or active / active configuration
In a symmetric configuration, each server is configured to run a specific application
or service and provide redundancy for its peer. In this example, each server runs
one application service group. When a failure occurs, the surviving server hosts
both application groups.
Figure 2-2 shows failover within a symmetric cluster configuration.
Figure 2-2
Symmetric failover
Before Failover
After Failover
Application1
Application1
Application2
Application2
Symmetric configurations appear more efficient in terms of hardware utilization. In
the asymmetric example, the redundant server requires only as much processor
power as its peer. On failover, performance remains the same. In the symmetric
example, the redundant server requires adequate processor power to run the
existing application and the new application it takes over.
45
About cluster topologies
Basic failover configurations
Further issues can arise in symmetric configurations when multiple applications
that run on the same system do not co-exist properly. Some applications work well
with multiple copies started on the same system, but others fail. Issues also can
arise when two applications with different I/O and memory requirements run on the
same system.
About N-to-1 configuration
An N-to-1 failover configuration reduces the cost of hardware redundancy and still
provides a potential, dedicated spare. In an asymmetric configuration no performance
penalty exists. No issues exist with multiple applications running on the same
system; however, the drawback is the 100 percent redundancy cost at the server
level.
Figure 2-3 shows an N to 1 failover configuration.
Figure 2-3
N-to-1 configuration
Redundant Server
Application
Application
Application
Application
An N-to-1 configuration is based on the concept that multiple, simultaneous server
failures are unlikely; therefore, a single redundant server can protect multiple active
servers. When a server fails, its applications move to the redundant server. For
example, in a 4-to-1 configuration, one server can protect four servers. This
configuration reduces redundancy cost at the server level from 100 percent to 25
percent. In this configuration, a dedicated, redundant server is cabled to all storage
and acts as a spare when a failure occurs.
The problem with this design is the issue of failback. When the failed server is
repaired, you must manually fail back all services that are hosted on the failover
server to the original server. The failback action frees the spare server and restores
redundancy to the cluster.
Figure 2-4 shows an N to 1 failover requiring failback.
46
About cluster topologies
About advanced failover configurations
Figure 2-4
N-to-1 failover requiring failback
Redundant Server
Application
Application
Application
Most shortcomings of early N-to-1 cluster configurations are caused by the limitations
of storage architecture. Typically, it is impossible to connect more than two hosts
to a storage array without complex cabling schemes and their inherent reliability
problems, or expensive arrays with multiple controller ports.
About advanced failover configurations
Advanced failover configuration for VCS include N + 1 and N-to-N configurations.
About the N + 1 configuration
With the capabilities introduced by storage area networks (SANs), you cannot only
create larger clusters, you can also connect multiple servers to the same storage.
Figure 2-5 shows an N+1 cluster failover configuration.
Figure 2-5
Service Group
N+1 configuration
Service Group
Service Group
Service Group
Spare
47
About cluster topologies
About advanced failover configurations
A dedicated, redundant server is no longer required in the configuration. Instead
of N-to-1 configurations, you can use an N+1 configuration. In advanced N+1
configurations, an extra server in the cluster is spare capacity only.
When a server fails, the application service group restarts on the spare. After the
server is repaired, it becomes the spare. This configuration eliminates the need for
a second application failure to fail back the service group to the primary system.
Any server can provide redundancy to any other server.
Figure 2-6 shows an N+1 cluster failover configuration requiring failback.
N+1 cluster failover configuration requiring failback
Figure 2-6
Service Group
Service Group
Service Group
Service Group
About the N-to-N configuration
An N-to-N configuration refers to multiple service groups that run on multiple servers,
with each service group capable of being failed over to different servers. For
example, consider a four-node cluster in which each node supports three critical
database instances.
Figure 2-7 shows an N to N cluster failover configuration.
48
About cluster topologies
Cluster topologies and storage configurations
N-to-N configuration
Figure 2-7
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG = Service Group
If any node fails, each instance is started on a different node. this action ensures
that no single node becomes overloaded. This configuration is a logical evolution
of N + 1; it provides cluster standby capacity instead of a standby server.
N-to-N configurations require careful testing to ensure that all applications are
compatible. You must specify a list of systems on which a service group is allowed
to run in the event of a failure.
Cluster topologies and storage configurations
The commonly-used cluster topologies include the following:
■
Shared storage clusters
■
Campus clusters
■
Shared nothing clusters
■
Replicated data clusters
■
Global clusters
About basic shared storage cluster
In this configuration, a single cluster shares access to a storage device, typically
over a SAN. You can only start an application on a node with access to the required
storage. For example, in a multi-node cluster, any node that is designated to run a
specific database instance must have access to the storage where the database’s
tablespaces, redo logs, and control files are stored. Such a shared disk architecture
is also the easiest to implement and maintain. When a node or application fails, all
data that is required to restart the application on another node is stored on the
shared disk.
Figure 2-8 shows a shared disk architecture for a basic cluster.
49
About cluster topologies
Cluster topologies and storage configurations
Shared disk architecture for basic cluster
Figure 2-8
Service Group
Service Group
Service Group
Service Group
About campus, or metropolitan, shared storage cluster
In a campus environment, you use VCS and Veritas Volume Manager to create a
cluster that spans multiple datacenters or buildings. Instead of a single storage
array, data is mirrored between arrays by using Veritas Volume Manager. This
configuration provides synchronized copies of data at both sites. This procedure is
identical to mirroring between two arrays in a datacenter; only now it is spread over
a distance.
Figure 2-9 shows a campus shared storage cluster.
Campus shared storage cluster
Figure 2-9
Site A
SG
Site B
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
SG
Veritas Volume Manager
RAID 1 Mirror of
Reliable Disks
SG = Service Group
SG
SG
50
About cluster topologies
Cluster topologies and storage configurations
A campus cluster requires two independent network links for heartbeat, two storage
arrays each providing highly available disks, and public network connectivity between
buildings on same IP subnet. If the campus cluster setup resides on different subnets
with one for each site, then use the VCS Lanman agent to handle the network
changes or issue the DNS changes manually.
About shared nothing clusters
Systems in shared nothing clusters do not share access to disks; they maintain
separate copies of data. VCS shared nothing clusters typically have read-only data
stored locally on both systems. For example, a pair of systems in a cluster that
includes a critical Web server, which provides access to a backend database. The
Web server runs on local disks and does not require data sharing at the Web server
level.
Figure 2-10 shows a shared nothing cluster.
Figure 2-10
Shared nothing cluster
About replicated data clusters
In a replicated data cluster no shared disks exist. Instead, a data replication product
synchronizes copies of data between nodes or sites. Replication can take place at
the application, host, and storage levels. Application-level replication products, such
as Oracle DataGuard, maintain consistent copies of data between systems at the
SQL or database levels. Host-based replication products, such as Veritas Volume
Replicator, maintain consistent storage at the logical volume level. Storage-based
or array-based replication maintains consistent copies of data at the disk or RAID
LUN level.
Figure 2-11 shows a hybrid shared storage and replicated data cluster, in which
different failover priorities are assigned to nodes according to particular service
groups.
51
About cluster topologies
Cluster topologies and storage configurations
Figure 2-11
Shared storage replicated data cluster
Service Group
Replication
You can also configure replicated data clusters without the ability to fail over locally,
but this configuration is not recommended.
See “ How VCS replicated data clusters work” on page 528.
About global clusters
A global cluster links clusters at separate locations and enables wide-area failover
and disaster recovery.
Local clustering provides local failover for each site or building. Campus and
replicated cluster configurations offer protection against disasters that affect limited
geographic regions. Large scale disasters such as major floods, hurricanes, and
earthquakes can cause outages for an entire city or region. In such situations, you
can ensure data availability by migrating applications to sites located considerable
distances apart.
Figure 2-12 shows a global cluster configuration.
52
About cluster topologies
Cluster topologies and storage configurations
Global cluster
Figure 2-12
Client
Cluster A
Client
Client
Client
Clients
Redirected
Public
Network
Cluster B
Application
Failover
Oracle
Group
Oracle
Group
Replicated
Data
Separate
Storage
Separate
Storage
In a global cluster, if an application or a system fails, the application is migrated to
another system within the same cluster. If the entire cluster fails, the application is
migrated to a system in another cluster. Clustering on a global level also requires
the replication of shared data to the remote site.
See “ How VCS global clusters work” on page 463.
53
Chapter
3
VCS configuration concepts
This chapter includes the following topics:
■
About configuring VCS
■
VCS configuration language
■
About the main.cf file
■
About the types.cf file
■
About VCS attributes
■
VCS keywords and reserved words
■
VCS environment variables
About configuring VCS
When you configure VCS, you convey to the VCS engine the definitions of the
cluster, service groups, resources, and dependencies among service groups and
resources.
VCS uses the following two configuration files in a default configuration:
■
main.cf
Defines the cluster, including services groups and resources.
■
types.cf
Defines the resource types.
By default, both files reside in the following directory:
%VCS_HOME%\conf\config
Additional files that are similar to types.cf may be present if you enabled agents
such as Oracletypes.cf.
VCS configuration concepts
VCS configuration language
In a VCS cluster, the first system to be brought online reads the configuration file
and creates an internal (in-memory) representation of the configuration. Systems
that are brought online after the first system derive their information from systems
that are in the cluster.
You must stop the cluster if you need to modify the files manually. Changes made
by editing the configuration files take effect when the cluster is restarted. The node
where you made the changes should be the first node to be brought back online.
VCS configuration language
The VCS configuration language specifies the makeup of service groups and their
associated entities, such as resource types, resources, and attributes. These
specifications are expressed in configuration files, whose names contain the suffix
.cf.
Several ways to generate configuration files are as follows:
■
Use the Web-based Cluster Management Console.
■
Use the Web-based Veritas Operations Manager.
■
Use Cluster Manager (Java Console).
■
Use the command-line interface.
■
If VCS is not running, use a text editor to create and modify the files.
■
Use the VCS simulator on a Windows system to create the files.
About the main.cf file
The format of the main.cf file comprises include clauses and definitions for the
cluster, systems, service groups, and resources. The main.cf file also includes
service group and resource dependency clauses.
Table 3-1 describes some of the components of the main.cf file:
55
VCS configuration concepts
About the main.cf file
Table 3-1
Components of the main.cf file
Components of main.cf
file
Description
Include clauses
Include clauses incorporate additional configuration files into
main.cf. These additional files typically contain type definitions,
including the types.cf file. Typically, custom agents add type
definitions in their own files.
include "types.cf"
See “Including multiple .cf files in main.cf” on page 58.
Cluster definition
Defines the attributes of the cluster, the cluster name and the
names of the cluster users.
cluster demo (
UserNames = { admin = cDRpdxPmHzpS }
)
See “Cluster attributes” on page 655.
System definition
Lists the systems designated as part of the cluster. The
system names must match the name returned by the
command uname -a.
Each service group can be configured to run on a subset of
systems defined in this section.
system Server1
system Server2
See System attributes on page 646.
Service group definition
Service group definitions in main.cf comprise the attributes
of a particular service group.
group FileShare_Group (
SystemList = { SystemA, SystemB }
AutoStartList = { SystemA }
)
See “Service group attributes” on page 626.
See “About the SystemList attribute” on page 57.
56
VCS configuration concepts
About the main.cf file
Table 3-1
57
Components of the main.cf file (continued)
Components of main.cf
file
Description
Resource definition
Defines each resource that is used in a particular service
group. You can add resources in any order. The utility hacf
arranges the resources alphabetically the first time the
configuration file is run.
NIC NIC_resource (
MACAddress @ system1= "02-B0-D0-D1-88-0E"
MACAddress @ system2= "50-B0-D0-D1-88-23"
)
Resource dependency clause Defines a relationship between resources. A dependency is
indicated by the keyword requires between two resource
names.
IP_resource requires NIC_resource
See “About resources and resource dependencies”
on page 32.
Service group dependency
clause
To configure a service group dependency, place the keyword
requires in the service group declaration of the main.cf file.
Position the dependency clause before the resource
dependency specifications and after the resource declarations.
requires group_x group_y
<dependency category>
<dependency location>
<dependency rigidity>
See “About service group dependencies” on page 415.
Note: Sample configurations for components of global clusters are listed separately.
See “ VCS global clusters: The building blocks” on page 464.
About the SystemList attribute
The SystemList attribute designates all systems where a service group can come
online. By default, the order of systems in the list defines the priority of systems
that are used in a failover. For example, the following definition configures SystemA
to be the first choice on failover, followed by SystemB, and then by SystemC.
VCS configuration concepts
About the main.cf file
SystemList = { SystemA, SystemB, SystemC }
You can assign system priority explicitly in the SystemList attribute by assigning
numeric values to each system name. For example:
SystemList = { SystemA = 0, SystemB = 1, SystemC = 2 }
If you do not assign numeric priority values, VCS assigns a priority to the system
without a number by adding 1 to the priority of the preceding system. For example,
if the SystemList is defined as follows, VCS assigns the values SystemA = 0,
SystemB = 2, SystemC = 3.
SystemList = { SystemA, SystemB = 2, SystemC }
Note that a duplicate numeric priority value may be assigned in some situations:
SystemList = { SystemA, SystemB=0, SystemC }
The numeric values assigned are SystemA = 0, SystemB = 0, SystemC = 1.
To avoid this situation, do not assign any numbers or assign different numbers to
each system in SystemList.
Initial configuration
When VCS is installed, a basic main.cf configuration file is created with the cluster
name, systems in the cluster, and a Cluster Manager user named admin with the
password password.
The following is an example of the main.cf for cluster demo and systems SystemA
and SystemB.
include "types.cf"
cluster demo (
UserNames = { admin = cDRpdxPmHzpS }
)
system SystemA (
)
system SystemB (
)
Including multiple .cf files in main.cf
You may choose include several configuration files in the main.cf file. For example:
58
VCS configuration concepts
About the types.cf file
include "applicationtypes.cf"
include "listofsystems.cf"
include "applicationgroup.cf"
If you include other .cf files in main.cf, the following considerations apply:
■
Resource type definitions must appear before the definitions of any groups that
use the resource types.
In the following example, the applicationgroup.cf file includes the service group
definition for an application. The service group includes resources whose
resource types are defined in the file applicationtypes.cf. In this situation, the
applicationtypes.cf file must appear first in the main.cf file.
For example:
include "applicationtypes.cf"
include "applicationgroup.cf"
■
If you define heartbeats outside of the main.cf file and include the heartbeat
definition file, saving the main.cf file results in the heartbeat definitions getting
added directly to the main.cf file.
About the types.cf file
The types.cf file describes standard resource types to the VCS engine; specifically,
the data required to control a specific resource.
The types definition performs the following two important functions:
■
Defines the type of values that may be set for each attribute.
In the following IP example, the Address attribute is classified as str, or string.
See “About attribute data types” on page 61.
■
Defines the parameters that are passed to the VCS engine through the ArgList
attribute. The line static str ArgList[] = { xxx, yyy, zzz } defines the order in which
parameters are passed to the agents for starting, stopping, and monitoring
resources.
The types.cf file describes standard resource types to the VCS engine; specifically,
the data required to control a specific resource.
type IP (
static i18nstr ArgList[] = { Address, SubNetMask,
MACAddress}
str Address
str SubNetMask
59
VCS configuration concepts
About VCS attributes
str MACAddress
)
For another example, review the following main.cf and types.cf files that represent
an IP resource:
■
The high-availability address is configured on the interface defined by the
Address attribute.
■
The IP address is enclosed in double quotes because the string contains periods.
See “About attribute data types” on page 61.
■
The VCS engine passes the identical arguments to the IP agent for online,
offline, clean, and monitor. It is up to the agent to use the arguments that it
requires. All resource names must be unique in a VCS cluster.
main.cf for Windows:
IP IP_resource (
Address = "192.168.1.201"
SubNetMask = "255.255.254.0"
MACAddress @ system1= "02-B0-D5-D1-88-0E"
MACAddress @ system2= "04-B0-D0-D1-88-43"
)
types.cf for Windows:
type IP (
static i18nstr ArgList[] = { Address, SubNetMask,
MACAddress}
str Address
str SubNetMask
str MACAddress
)
About VCS attributes
VCS components are configured by using attributes. Attributes contain data about
the cluster, systems, service groups, resources, resource types, agent, and
heartbeats if you use global clusters. For example, the value of a service group’s
SystemList attribute specifies on which systems the group is configured and the
priority of each system within the group. Each attribute has a definition and a value.
Attributes also have default values assigned when a value is not specified.
60
VCS configuration concepts
About VCS attributes
About attribute data types
VCS supports the following data types for attributes:
String
A string is a sequence of characters that is enclosed by double quotes.
A string can also contain double quotes, but the quotes must be
immediately preceded by a backslash. A backslash is represented in
a string as \\. Quotes are not required if a string begins with a letter,
and contains only letters, numbers, dashes (-), and underscores (_).
VCS also supports UTF-8 encoded values for some attributes.
See “Localizable attributes” on page 63.
Integer
Signed integer constants are a sequence of digits from 0 to 9. They
may be preceded by a dash, and are interpreted in base 10. Integers
cannot exceed the value of a 32-bit signed integer: 21471183247.
Boolean
A boolean is an integer, the possible values of which are 0 (false) and
1 (true).
About attribute dimensions
VCS attributes have the following dimensions:
Scalar
A scalar has only one value. This is the default dimension.
Vector
A vector is an ordered list of values. Each value is indexed by using a
positive integer beginning with zero. Use a comma (,) or a semi-colon
(;) to separate values. A set of brackets ([]) after the attribute name
denotes that the dimension is a vector.
For example, an agent’s ArgList is defined as:
static str ArgList[] = { Address, SubNetMask,
MACAddress }
Keylist
A keylist is an unordered list of strings, and each string is unique within
the list. Use a comma (,) or a semi-colon (;) to separate values.
For example, to designate the list of systems on which a service group
will be started with VCS (usually at system boot):
AutoStartList = {SystemA; SystemB; SystemC}
61
VCS configuration concepts
About VCS attributes
Association
An association is an unordered list of name-value pairs. Use a comma
(,) or a semi-colon (;) to separate values.
A set of braces ({}) after the attribute name denotes that an attribute is
an association.
For example, to associate the average time and timestamp values with
an attribute:
str MonitorTimeStats{} = { Avg = "0", TS = "" }
About attributes and cluster objects
VCS has the following types of attributes, depending on the cluster object the
attribute applies to:
Cluster attributes
Attributes that define the cluster.
For example, ClusterName and ClusterAddress.
Service group
attributes
Attributes that define a service group in the cluster.
System attributes
Attributes that define the system in the cluster.
For example, Administrators and ClusterList.
For example, Capacity and Limits.
62
VCS configuration concepts
About VCS attributes
Resource type
attributes
Attributes that define the resource types in VCS.
These resource type attributes can be further classified as:
■
■
■
Type-independent
Attributes that all agents (or resource types) understand. Examples:
RestartLimit and MonitorInterval; these can be set for any resource
type.
Typically, these attributes are set for all resources of a specific type.
For example, setting MonitorInterval for the IP resource type affects
all IP resources.
Type-dependent
Attributes that apply to a particular resource type. These attributes
appear in the type definition file (types.cf) for the agent.
Example: The Address attribute applies only to the IP resource type.
Attributes defined in the file types.cf apply to all resources of a
particular resource type. Defining these attributes in the main.cf file
overrides the values in the types.cf file for a specific resource.
For example, if you set StartVolumes = 1 for the DiskGroup types.cf,
it sets StartVolumes to True for all DiskGroup resources, by default.
If you set the value in main.cf , it overrides the value on a
per-resource basis.
Static
These attributes apply for every resource of a particular type. These
attributes are prefixed with the term static and are not included in
the resource’s argument list. You can override some static attributes
and assign them resource-specific values.
See “Overriding resource type static attributes” on page 218.
Resource
attributes
Attributes that define a specific resource.
Some of these attributes are type-independent. For example, you can
configure the Critical attribute for any resource.
Some resource attributes are type-dependent. For example, the Address
attribute defines the IP address that is associated with the IP resource.
These attributes are defined in the main.cf file.
Localizable attributes
VCS supports UTF-8 encoded localized values for some attributes. These attributes
are identified by the i18nstr keyword in the type definition file types.cf.
For example, in the FileOnOff agent, the attribute PathName is a localizable attribute.
type FileOnOff (
static i18nstr ArgList[] = { PathName }
63
VCS configuration concepts
About VCS attributes
i18nstr PathName
)
You can add a localizable string attribute by using the haattr -add -i18nstring
command.
Attribute scope across systems: global and local attributes
An attribute whose value applies to all systems is global in scope. An attribute
whose value applies on a per-system basis is local in scope. The at operator (@)
indicates the system to which a local value applies.
An example of local attributes can be found in the IP resource type where Mac
addresses and routing options are assigned per machine.
IP IP_resource (
Address = "192.168.1.201"
SubNetMask = "255.255.254.0"
MACAddress @ system1= "02-B1-D5-D1-88-0E"
MACAddress @ system2= "04-B0-D0-D1-88-43"
)
About attribute life: temporary attributes
You can define temporary attributes in the types.cf file. The values of temporary
attributes remain in memory as long as the VCS engine (HAD) is running. Values
of temporary attributes are not available when HAD is restarted. These attribute
values are not stored in the main.cf file.
You cannot convert temporary attributes to permanent attributes and vice-versa.
When you save a configuration, VCS saves temporary attributes and their default
values in the file types.cf.
The scope of these attributes can be local to a node or global across all nodes in
the cluster. You can define local attributes even when the node is not part of a
cluster.
You can define and modify these attributes only while VCS is running.
See “Adding, deleting, and modifying resource attributes” on page 211.
Size limitations for VCS objects
The following VCS objects are restricted to 1024 bytes.
■
Service group names
■
Resource names
64
VCS configuration concepts
VCS keywords and reserved words
■
Resource type names
■
User names
■
Attribute names
VCS passwords are restricted to 255 characters. You can enter a password of
maximum 255 characters.
VCS keywords and reserved words
Following is a list of VCS keywords and reserved words. Note that they are
case-sensitive.
action
false
local
requires
stop
after
firm
offline
resource
str
ArgListValues
global
online
set
system
before
group
MonitorOnly
Signaled
System
boolean
Group
Name
soft
temp
cluster
hard
NameRule
start
type
Cluster
heartbeat
Path
Start
Type
condition
int
Probed
state
ConfidenceLevel
IState
remote
State
event
keylist
remotecluster
static
VCS environment variables
Table 3-2 lists VCS environment variables.
Table 3-2
VCS environment variables
Environment Variable
Definition and Default Value
PERL5LIB
Root directory for Perl executables. (applicable only for Windows)
Default: Install Drive:\Program Files\VERITAS\cluster server\lib\perl5.
65
VCS configuration concepts
VCS environment variables
Table 3-2
VCS environment variables (continued)
Environment Variable
Definition and Default Value
VCS_CONF
Root directory for VCS configuration files.
Default: Install Drive:\Program Files\VERITAS\cluster server\conf\config
Note: If this variable is added or modified, you must reboot the system to apply the
changes.
VCS_DEBUG_LOG_TAGS
Enables debug logs for the VCS engine, VCS agents, and HA commands. You must
set VCS_DEBUG_LOG_TAGS before you start HAD or before you execute HA
commands.
You can also export the variable from the /opt/VRTSvcs/bin/vcsenv file.
VCS_DOMAIN
The Security domain in which users are configured.
The Security domain to which the VCS users belong.
Symantec Product Authentication Service uses this environment variable to authenticate
VCS users on a remote host.
Default: Fully qualified host name of the remote host as defined in the VCS_HOST
environment variable or in the .vcshost file.
VCS_DOMAINTYPE
Type of domain: unixpwd, nt, nis, nisplus, or vx.
The type of Security domain such as unixpwd, nt, nis, nisplus, ldap, or vx.
Symantec Product Authentication Service uses this environment variable to authenticate
VCS users on a remote host.
Default: unixpwd
VCS_DIAG
Directory where VCS dumps HAD cores.
VCS_ENABLE_LDF
Designates whether or not log data files (LDFs) are generated. If set to 1, LDFs are
generated. If set to 0, they are not.
VCS_HOME
Root directory for VCS executables.
Default: Install Drive:\Program Files\VERITAS\cluster server\
VCS_HOST
VCS node on which ha commands will be run.
VCS_GAB_PORT
GAB port to which VCS connects.
Default: h
66
VCS configuration concepts
VCS environment variables
Table 3-2
VCS environment variables (continued)
Environment Variable
Definition and Default Value
VCS_GAB_TIMEOUT
Timeout in milliseconds for HAD to send heartbeats to GAB.
Default: 30000 (denotes 30 seconds)
Range: 30000 to 300000 (denotes 30 seconds to 300 seconds)
If you set VCS_GAB_TIMEOUT to a value outside the range, the value is automatically
reset to 30000 or 300000, depending on the proximity of the value to either the lower
limit or upper limit of the range. For example, the value is reset to 30000 if you specify
22000 and to 300000 if you specify 400000.
Note: If the specified timeout is exceeded, GAB kills HAD, and all active service groups
on system are disabled.
VCS_GAB_RMTIMEOUT
Timeout in milliseconds for HAD to register with GAB.
Default: 200000 (denotes 200 seconds)
If you set VCS_GAB_RMTIMEOUT to a value less than 200000, the value is
automatically reset to 200000.
See “About registration monitoring” on page 542.
VCS_GAB_RMACTION
Controls the GAB behavior when VCS_GAB_RMTIMEOUT exceeds.
You can set the value as follows:
■
panic—GAB panics the system
■
SYSLOG—GAB logs an appropriate message
Default: SYSLOG
See “About registration monitoring” on page 542.
VCS_HAD_RESTART_
TIMEOUT
Set this variable to designate the amount of time the hashadow process waits (sleep
time) before restarting HAD.
Default: 0
VCS_LOG
Root directory for log files and temporary files.
Default: Install Drive:\Program Files\VERITAS\cluster server\
Note: If this variable is added or modified, you must reboot the system to apply the
changes.
VCS_SERVICE
Name of configured VCS service.
Default: vcs-app
Note: Before you start the VCS engine (HAD), configure the specified service. If a
service is not specified, the VCS engine starts with port 14141.
67
VCS configuration concepts
VCS environment variables
Table 3-2
VCS environment variables (continued)
Environment Variable
Definition and Default Value
VCS_TEMP_DIR
Directory in which temporary information required by, or generated by, hacf is stored.
Default: Install Drive:\Program Files\VERITAS\cluster server\
This directory is created in /tmp under the following conditions:
■
The variable is not set.
■
The variable is set but the directory to which it is set does not exist.
■
The utility hacf cannot find the default location.
68
Section
2
Administration - Putting VCS
to work
■
Chapter 4. About the VCS user privilege model
■
Chapter 5. Getting started with VCS
■
Chapter 6. Administering the cluster from Cluster Manager (Java console)
■
Chapter 7. Administering the cluster from the command line
■
Chapter 8. Configuring resources and applications in VCS
■
Chapter 9. Modifying the cluster configuration
■
Chapter 10. Predicting VCS behavior using VCS Simulator
Chapter
4
About the VCS user
privilege model
This chapter includes the following topics:
■
About VCS user privileges and roles
■
How administrators assign roles to users
■
User privileges for OS user groups for clusters running in secure mode
■
VCS privileges for users with multiple roles
About VCS user privileges and roles
Cluster operations are enabled or restricted depending on the privileges with which
you log on. VCS has three privilege levels: Administrator, Operator, and Guest.
VCS provides some predefined user roles; each role has specific privilege levels.
For example, the role Guest has the fewest privileges and the role Cluster
Administrator has the most privileges.
See “About administration matrices” on page 593.
VCS privilege levels
Table 4-1 describes the VCS privilege categories.
Table 4-1
VCS privileges
VCS privilege
levels
Privilege description
Administrators
Can perform all operations, including configuration
About the VCS user privilege model
About VCS user privileges and roles
Table 4-1
VCS privileges (continued)
VCS privilege
levels
Privilege description
Operators
Can perform specific operations on a cluster or a service group.
Guests
Can view specified objects.
User roles in VCS
Table 4-2 lists the predefined VCS user roles, with a summary of their associated
privileges.
Table 4-2
User role and privileges
User Role
Privileges
Cluster
administrator
Cluster administrators are assigned full privileges. They can make
configuration read-write, create and delete groups, set group
dependencies, add and delete systems, and add, modify, and delete
users. All group and resource operations are allowed. Users with Cluster
administrator privileges can also change other users’ privileges and
passwords.
To stop a cluster, cluster administrators require administrative privileges
on the local system.
Note: Cluster administrators can change their own and other users’
passwords only after they change the configuration to read or write
mode.
Cluster administrators can create and delete resource types.
Cluster operator
Cluster operators can perform all cluster-level, group-level, and
resource-level operations, and can modify the user’s own password
and bring service groups online.
Note: Cluster operators can change their own passwords only if
configuration is in read or write mode. Cluster administrators can change
the configuration to the read or write mode.
Users with this role can be assigned group administrator privileges for
specific service groups.
Group
administrator
Group administrators can perform all service group operations on
specific groups, such as bring groups and resources online, take them
offline, and create or delete resources. Additionally, users can establish
resource dependencies and freeze or unfreeze service groups. Note
that group administrators cannot create or delete service groups.
71
About the VCS user privilege model
About VCS user privileges and roles
Table 4-2
User role and privileges (continued)
User Role
Privileges
Group operator
Group operators can bring service groups and resources online and
take them offline. Users can also temporarily freeze or unfreeze service
groups.
Cluster guest
Cluster guests have read-only access to the cluster, which means that
they can view the configuration, but cannot change it. They can modify
their own passwords only if the configuration is in read or write mode.
They cannot add or update users. Additionally, users with this privilege
can be assigned group administrator or group operator privileges for
specific service groups.
Note: By default, newly created users are assigned cluster guest
permissions.
Group guest
Group guests have read-only access to the service group, which means
that they can view the configuration, but cannot change it. The group
guest role is available for clusters running in secure mode.
Hierarchy in VCS roles
Figure 4-1 shows the hierarchy in VCS and how the roles overlap with one another.
Figure 4-1
VCS roles
Cluster Administrator
includes privileges for
Group Administrator
includes privileges for
Cluster Operator
includes privileges for
Group Operator
includes privileges for
Cluster Guest
includes privileges for
GroupGuest
For example, cluster administrator includes privileges for group administrator, which
includes privileges for group operator.
User privileges for CLI commands
Users logged with administrative or root privileges are granted privileges that exceed
those of cluster administrator, such as the ability to start and stop a cluster.
72
About the VCS user privilege model
How administrators assign roles to users
User privileges in global clusters
VCS permits a cross-cluster online or offline operation only if the user initiating the
operation has one of the following privileges:
■
Group administrator or group operator privileges for the group on the remote
cluster
■
Cluster administrator or cluster operator privileges on the remote cluster
VCS permits a cross-cluster switch operation only if the user initiating the operation
has the following privileges:
■
Group administrator or group operator privileges for the group on both clusters
■
Cluster administrator or cluster operator privileges on both clusters
User privileges for clusters that run in secure mode
In secure mode, VCS assigns guest privileges to all native users.
When you assign privileges for clusters running in secure mode, you must specify
fully-qualified user names, in the format username@domain.
Note: User names provided in the domain\username orusername@domain.com
formats do not work.
User names provided in the domain\username orusername@domain.com
formats are saved when you enter them, but they do not work.
You cannot assign or change passwords for users that use VCS when VCS runs
in secure mode.
How administrators assign roles to users
To assign a role to a user, an administrator performs the following tasks:
■
Adds a user to the cluster, if the cluster is not running in secure mode.
■
Assigns a role to the user.
■
Assigns the user a set of objects appropriate for the role. For clusters that run
in secure mode, you also can add a role to an operating system user group.
See “User privileges for OS user groups for clusters running in secure mode”
on page 74.
73
About the VCS user privilege model
User privileges for OS user groups for clusters running in secure mode
For example, an administrator may assign a user the group administrator role for
specific service groups. Now, the user has privileges to perform operations on the
specific service groups.
You can manage users and their privileges from the command line or from the
graphical user interface.
See “About managing VCS users from the command line” on page 191.
See “Administering user profiles” on page 131.
User privileges for OS user groups for clusters running
in secure mode
For clusters that run in secure mode, you can assign privileges to native users
individually or at an operating system (OS) user group level.
For example, you may decide that all users that are part of the OS administrators
group get administrative privileges to the cluster or to a specific service group.
Assigning a VCS role to a user group assigns the same VCS privileges to all
members of the user group, unless you specifically exclude individual users from
those privileges.
When you add a user to an OS user group, the user inherits VCS privileges assigned
to the user group.
Assigning VCS privileges to an OS user group involves adding the user group in
one (or more) of the following attributes:
■
AdministratorGroups—for a cluster or for a service group.
■
OperatorGroups—for a cluster or for a service group.
For example, user Tom belongs to an OS user group: OSUserGroup1.
Table 4-3 shows how to assign VCS privileges. FQDN denotes the fully qualified
domain name in these examples.
Table 4-3
To assign user privileges
To assign
privileges
At an individual level, configure To the OS user group, configure
attribute
attribute
Cluster
administrator
cluster (Administrators =
{tom@FQDN})
Cluster operator
cluster (Operators = {tom@FQDN}) cluster (OperatorGroups =
{OSUserGroup1@FQDN})
cluster (AdministratorGroups =
{OSUserGroup1@FQDN})
74
About the VCS user privilege model
VCS privileges for users with multiple roles
Table 4-3
To assign user privileges (continued)
To assign
privileges
At an individual level, configure To the OS user group, configure
attribute
attribute
Cluster guest
Cluster (Guests = {tom@FQDN})
Group
administrator
group group_name (Administrators group group_name
= {tom@FQDN})
(AdministratorGroups =
{OSUserGroup1@FQDN})
Group operator
group group_name (Operators =
{tom@FQDN})
group group_name
(OperatorGroups =
{OSUserGroup1@FQDN})
Group guest
Cluster (Guests = {tom@FQDN})
Not applicable
Not applicable
VCS privileges for users with multiple roles
Table 4-4 describes how VCS assigns privileges to users with multiple roles. The
scenarios describe user Tom who is part of two OS user groups: OSUserGroup1
and OSUserGroup2.
Table 4-4
VCS privileges for users with multiple roles
Situation and rule
Roles assigned in the VCS Privileges that VCS grants
configuration
Tom
Situation: Multiple roles at
an individual level.
Tom: Cluster administrator
Cluster administrator.
Tom: Group operator
Rule: VCS grants highest
privileges (or a union of all
the privileges) to the user.
Situation: Roles at an
Tom: Group operator
individual and OS user
OSUserGroup1: Cluster
group level (secure clusters
administrator
only).
Rule: VCS gives
precedence to the role
granted at the individual
level.
Group operator
75
About the VCS user privilege model
VCS privileges for users with multiple roles
Table 4-4
VCS privileges for users with multiple roles (continued)
Situation and rule
Roles assigned in the VCS Privileges that VCS grants
configuration
Tom
Situation: Different roles for OSUserGroup1: Cluster
different OS user groups
administrators
(secure clusters only).
OSUserGroup2: Cluster
Rule: VCS grants the
operators
highest privilege (or a union
of all privileges of all user
groups) to the user.
Cluster administrator
Situation: Roles at an
OSUserGroup1: Cluster
individual and OS user
administrators
group level (secure clusters
OSUserGroup2: Cluster
only).
operators
Rule: VCS gives
Tom: Group operator
precedence to the role
granted at the individual
level.
Group operator
You can use this behavior
to exclude specific users
from inheriting VCS
privileges assigned to their
OS user groups.
76
Chapter
5
Getting started with VCS
This chapter includes the following topics:
■
Configuring the cluster using the Cluster Configuration Wizard
■
About configuring a cluster from the command line
Configuring the cluster using the Cluster
Configuration Wizard
After installing the software, set up the components required to run Veritas Cluster
Server. The VCS Cluster Configuration Wizard (VCW) sets up the cluster
infrastructure, including LLT and GAB, the user account for the VCS Helper service,
and provides an option for configuring the VCS Authentication Service in the cluster.
The wizard also configures the ClusterService group, which contains resources for
notification and global clusters (GCO). You can also use VCW to modify or delete
cluster configurations.
Note: After configuring the cluster you must not change the names of the nodes
that are part of the cluster. If you wish to change a node name, run VCW to remove
the node from the cluster, rename the system, and then run VCW again to add that
system to the cluster.
Note the following prerequisites before you proceed:
■
The required network adapters, and SCSI controllers are installed and connected
to each system.
To prevent lost heartbeats on the private networks, and to prevent VCS from
mistakenly declaring a system down, Symantec recommends disabling the
Ethernet auto-negotiation options on the private network adapters. Contact the
Getting started with VCS
Configuring the cluster using the Cluster Configuration Wizard
NIC manufacturer for details on this process. Symantec recommends removing
Internet Protocol TCP/IP from private NICs to lower system overhead.
■
Verify that the public network adapters on each node use static IP addresses
(DHCP is not supported) and name resolution is configured for each node.
■
Symantec recommends that you use three network adapters (two NICs
exclusively for the VCS private network and one for the public network) per
system. You can implement the second private link as a low-priority link over a
public interface. Route each private NIC through a separate hub or switch to
avoid single points of failure. Symantec recommends that you disable TCP/IP
from private NICs to lower system overhead.
Note: If you wish to use Windows NIC teaming, you must select the Static
Teaming mode. Only the Static Teaming mode is currently supported.
■
Use independent hubs or switches for each VCS communication network (GAB
and LLT). You can use cross-over Ethernet cables for two-node clusters. GAB
supports hub-based or switch network paths, or two-system clusters with direct
network links.
■
Verify the DNS settings for all systems on which SQL will be installed and ensure
that the public adapter is the first adapter in the Connections list.
When enabling DNS name resolution, make sure that you use the public network
adapters, and not those configured for the VCS private network.
■
The logged on user must have local Administrator privileges on the system
where you run the wizard. The user account must be a domain user account.
■
The logged on user must have administrative access to all systems selected
for cluster operations. Add the domain user account to the local Administrator
group of each system.
■
If you plan to create a new user account for the VCS Helper service, the logged
on user must have Domain Administrator privileges or must belong to the Domain
Account Operators group.
■
When configuring a user account for the VCS Helper service, make sure that
the user account is a domain user. The VCS High Availability Engine (HAD),
which runs in the context of the local system built-in account, uses the VCS
Helper Service user context to access the network. This account does not require
Domain Administrator privileges.
■
Make sure the VCS Helper Service domain user account has "Add workstations
to domain" privilege enabled in the Active Directory.
78
Getting started with VCS
Configuring the cluster using the Cluster Configuration Wizard
■
Verify that each system can access the storage devices and each system
recognizes the attached shared disk.
Use Windows Disk Management on each system to verify that the attached
shared LUNs (virtual disks) are visible.
■
If you plan to set up a disaster recovery (DR) environment, you must configure
the wide-area connector process for global clusters.
■
If you are setting up a Replicated Data Cluster configuration, add only the
systems in the primary zone (zone 0) to the cluster, at this time.
To configure a VCS cluster using the wizard
1
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > Cluster Configuration Wizard to start the VCS Cluster
Configuration Wizard.
2
Read the information on the Welcome panel and click Next.
3
On the Configuration Options panel, click Cluster Operations and click Next.
4
On the Domain Selection panel, select or type the name of the domain in which
the cluster resides and select the discovery options.
To discover information about all systems and users in the domain, do the
following:
■
Clear Specify systems and users manually.
■
Click Next.
Proceed to step 8.
To specify systems and user names manually (recommended for large
domains), do the following:
5
■
Select Specify systems and users manually.
Additionally, you may instruct the wizard to retrieve a list of systems and
users in the domain by selecting appropriate check boxes.
■
Click Next.
If you chose to retrieve the list of systems, proceed to step 6. Otherwise,
proceed to the next step.
On the System Selection panel, type the name of each system to be added,
click Add, and then click Next.
Do not specify systems that are part of another cluster.
Proceed to step 8.
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6
On the System Selection panel, specify the systems for the cluster and then
click Next.
Do not select systems that are part of another cluster.
Enter the name of the system and click Add to add the system to the Selected
Systems list, or click to select the system in the Domain Systems list and then
click the > (right-arrow) button.
7
The System Report panel displays the validation status, whether Accepted or
Rejected, of all the systems you specified earlier. Review the status and then
click Next.
Select the system to see the validation details. If you wish to include a rejected
system, rectify the error based on the reason for rejection and then run the
wizard again.
A system can be rejected for any of the following reasons:
8
■
System is not pingable.
■
WMI access is disabled on the system.
■
Wizard is unable to retrieve the system architecture or operating system.
■
VCS is either not installed on the system or the version of VCS is different
from what is installed on the system on which you are running the wizard.
On the Cluster Configuration Options panel, click Create New Cluster and
then click Next.
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Getting started with VCS
Configuring the cluster using the Cluster Configuration Wizard
9
On the Cluster Details panel, specify the details for the cluster and then click
Next.
Specify the cluster details as follows:
Cluster Name
Type a name for the new cluster. Symantec recommends a
maximum length of 32 characters for the cluster name.
Cluster ID
Select a cluster ID from the suggested cluster IDs in the drop-down
list, or type a unique ID for the cluster. The cluster ID can be any
number from 0 to 65535.
Note: If you chose to specify systems and users manually in step
4 or if you share a private network between more than one domain,
make sure that the cluster ID is unique.
Operating System From the drop-down list, select the operating system.
All the systems in the cluster must have the same operating system
and architecture. For example, you cannot configure a Windows
Server 2008 and a Windows Server 2008 R2 system in the same
cluster.
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Available Systems Select the systems that you wish to configure in the cluster.
Check the Select all systems check box to select all the systems
simultaneously.
The wizard discovers the NICs on the selected systems. For
single-node clusters with the required number of NICs, the wizard
prompts you to configure a private link heartbeat. In the dialog
box, click Yes to configure a private link heartbeat.
10 The wizard validates the selected systems for cluster membership. After the
systems are validated, click Next.
If a system is not validated, review the message associated with the failure
and restart the wizard after rectifying the problem.
If you chose to configure a private link heartbeat in step 9, proceed to the next
step. Otherwise, proceed to step 12.
11 On the Private Network Configuration panel, configure the VCS private network
and then click Next. You can configure the VCS private network either over
the ethernet or over the User Datagram Protocol (UDP) layer using IPv4 or
IPv6 network.
Do one of the following:
■
To configure the VCS private network over ethernet, complete the following
steps:
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Configuring the cluster using the Cluster Configuration Wizard
■
Select Configure LLT over Ethernet.
■
Select the check boxes next to the two NICs to be assigned to the private
network. You can assign a maximum of eight network links.
Symantec recommends reserving two NICs exclusively for the private
network. However, you could lower the priority of one of the NICs and use
the low-priority NIC for both public and as well as private communication.
■
If there are only two NICs on a selected system, Symantec recommends
that you lower the priority of at least one NIC that will be used for private
as well as public network communication.
To lower the priority of a NIC, right-click the NIC and select Low Priority
from the pop-up menu.
■
If your configuration contains teamed NICs, the wizard groups them as "NIC
Group #N" where "N" is a number assigned to the teamed NIC. A teamed
NIC is a logical NIC, formed by grouping several physical NICs together.
All NICs in a team have an identical MAC address. Symantec recommends
that you do not select teamed NICs for the private network.
The wizard configures the LLT service (over ethernet) on the selected
network adapters.
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Configuring the cluster using the Cluster Configuration Wizard
■
To configure the VCS private network over the User Datagram Protocol
(UDP) layer, complete the following steps:
■
Select Configure LLT over UDP on IPv4 network or Configure LLT over
UDP on IPv6 network depending on the IP protocol that you wish to use.
The IPv6 option is disabled if the network does not support IPv6.
■
Select the check boxes next to the NICs to be assigned to the private
network. You can assign a maximum of eight network links. Symantec
recommends reserving two NICs exclusively for the VCS private network.
■
For each selected NIC, verify the displayed IP address. If a selected NIC
has multiple IP addresses assigned, double-click the field and choose the
desired IP address from the drop-down list. In case of IPv4, each IP address
can be in a different subnet.
The IP address is used for the VCS private communication over the specified
UDP port.
■
Specify a unique UDP port for each of the link. Click Edit Ports if you wish
to edit the UDP ports for the links. You can use ports in the range 49152
to 65535. The default ports numbers are 50000 and 50001 respectively.
Click OK.
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Configuring the cluster using the Cluster Configuration Wizard
For each selected NIC, double-click the respective field in the Link column
and choose a link from the drop-down list. Specify a different link (Link1 or
Link2) for each NIC. Each link is associated with a UDP port that you
specified earlier.
The wizard configures the LLT service (over UDP) on the selected network
adapters. The specified UDP ports are used for the private network
communication.
12 On the VCS Helper Service User Account panel, specify the name of a domain
user for the VCS Helper Service.
The VCS High Availability Engine (HAD), which runs in the context of the local
system built-in account, uses the VCS Helper Service user context to access
the network. This account does not require Domain Administrator privileges.
Specify the domain user details as follows:
■
To specify an existing user, do one of the following:
■
Click Existing user and select a user name from the drop-down list.
■
If you chose not to retrieve the list of users in step 4, type the user name
in the Specify User field and then click Next.
■
To specify a new user, click New user and type a valid user name in the
Create New User field and then click Next.
Do not append the domain name to the user name; do not type the user
name as Domain\user or user@domain.
■
In the Password dialog box, type the password for the specified user and
click OK, and then click Next.
13 On the Configure Security Service Option panel, specify security options for
the cluster communications and then click Next.
Do one of the following:
■
To use VCS cluster user privileges, click Use VCS User Privileges and
then type a user name and password.
The wizard configures this user as a VCS Cluster Administrator. In this
mode, communication between cluster nodes and clients, including Cluster
Manager (Java Console), occurs using the encrypted VCS cluster
administrator credentials. The wizard uses the VCSEncrypt utility to encrypt
the user password.
The default user name for the VCS administrator is admin and the password
is password. Both are case-sensitive. You can accept the default user name
and password for the VCS administrator account or type a new name and
password.
Symantec recommends that you specify a new user name and password.
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Getting started with VCS
Configuring the cluster using the Cluster Configuration Wizard
■
To use the single sign-on feature, click Use Single Sign-on.
In this mode, the VCS Authentication Service is used to secure
communication between cluster nodes and clients by using digital certificates
for authentication and SSL to encrypt communication over the public
network. VCS uses SSL encryption and platform-based authentication. The
VCS high availability engine (HAD) and Veritas Command Server run in
secure mode.
The wizard configures all the cluster nodes as root brokers (RB) and
authentication brokers (AB). Authentication brokers serve as intermediate
registration and certification authorities. Authentication brokers have
certificates signed by the root. These brokers can authenticate clients such
as users and services. The wizard creates a copy of the certificates on all
the cluster nodes.
14 Review the summary information on the Summary panel, and click Configure.
The wizard configures the VCS private network. If the selected systems have
LLT or GAB configuration files, the wizard displays an informational dialog box
before overwriting the files. In the dialog box, click OK to overwrite the files.
Otherwise, click Cancel, exit the wizard, move the existing files to a different
location, and rerun the wizard.
The wizard starts running commands to configure VCS services. If an operation
fails, click View configuration log file to see the log.
15 On the Completing Cluster Configuration panel, click Next to configure the
ClusterService group; this group is required to set up components for notification
and for global clusters.
To configure the ClusterService group later, click Finish.
At this stage, the wizard has collected the information required to set up the
cluster configuration. After the wizard completes its operations, with or without
the ClusterService group components, the cluster is ready to host application
service groups. The wizard also starts the VCS engine (HAD) and the Veritas
Command Server at this stage.
16 On the Cluster Service Components panel, select the components to be
configured in the ClusterService group and then click Next.
Do the following:
■
Check the Notifier Option check box to configure notification of important
events to designated recipients.
See “Configuring notification” on page 87.
■
Check the GCO Option check box to configure the wide-area connector
(WAC) process for global clusters.The WAC process is required for
inter-cluster communication.
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Configuring the cluster using the Cluster Configuration Wizard
Configure the GCO Option using this wizard only if you are configuring a
Disaster Recovery (DR) environment and are not using the Disaster
Recovery wizard.
You can configure the GCO Option using the DR wizard. The Disaster
Recovery chapters in the application solutions guides discuss how to use
the Disaster Recovery wizard to configure the GCO option.
See “Configuring Wide-Area Connector process for global clusters”
on page 89.
Configuring notification
This section describes steps to configure notification.
To configure notification
1
On the Notifier Options panel, specify the mode of notification to be configured
and then click Next.
You can configure VCS to generate SNMP (V2) traps on a designated server
and send emails to designated recipients in response to certain events.
2
If you chose to configure SNMP, specify information about the SNMP console
and then click Next.
Do the following:
■
Click a field in the SNMP Console column and type the name or IP address
of the console.
The specified SNMP console must be MIB 2.0 compliant.
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Getting started with VCS
Configuring the cluster using the Cluster Configuration Wizard
3
■
Click the corresponding field in the Severity column and select a severity
level for the console.
■
Click the + icon to add a field; click the - icon to remove a field.
■
Enter an SNMP trap port. The default value is 162.
If you chose to configure SMTP, specify information about SMTP recipients
and then click Next.
Do the following:
■
Type the name of the SMTP server.
■
Click a field in the Recipients column and enter a recipient for notification.
Enter recipients as admin@example.com.
■
Click the corresponding field in the Severity column and select a severity
level for the recipient.
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Getting started with VCS
Configuring the cluster using the Cluster Configuration Wizard
VCS sends messages of an equal or higher severity to the recipient.
■
4
Click the + icon to add fields; click the - icon to remove a field.
On the Notifier Network Card Selection panel, specify the network information
and then click Next.
Do the following:
■
If the cluster has a ClusterService group configured, you can use the NIC
resource configured in that service group or configure a new NIC resource
for notification.
■
If you choose to configure a new NIC resource, select a network adapter
for each node in the cluster.
The wizard lists the public network adapters along with the adapters that
were assigned a low priority.
5
Review the summary information and choose whether you want to bring the
notification resources online when VCS starts and click Configure.
6
Click Finish to exit the wizard.
Configuring Wide-Area Connector process for global clusters
Configure the Wide-Area Connector process only if you are configuring a disaster
recovery environment. The GCO option configures the wide-area connector (WAC)
process for global clusters. The WAC process is required for inter-cluster
communication. Configure the GCO Option using this wizard only if you are
configuring a Disaster Recovery (DR) environment and are not using the Disaster
Recovery wizard.
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Configuring the cluster using the Cluster Configuration Wizard
You can configure the GCO Option using the DR wizard. The Disaster Recovery
chapters in the application solutions guides discuss how to use the Disaster
Recovery wizard to configure the GCO option.
To configure the wide-area connector process for global clusters
1
On the GCO Network Selection panel, specify the network information and
then click Next.
If the cluster has a ClusterService group configured, you can use the IP address
configured in the service group or configure a new IP address.
Do the following:
■
To specify an existing IP address, select Use existing IP resource and
then select the IP address from the drop-down list.
■
To use a new IP address, do the following:
■
In case of IPv4, select IPV4 and then enter the IP address and
associated subnet mask. Make sure that the specified IP address has
a DNS entry.
■
In case of IPv6, select IPV6 and select the IPv6 network from the
drop-down list.
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About configuring a cluster from the command line
91
The wizard uses the network prefix and automatically generates a unique
IPv6 address that is valid on the network.
The IPv6 option is disabled if the network does not support IPv6.
■
Select a network adapter for each node in the cluster.
The wizard lists the public network adapters along with the adapters that
were assigned a low priority.
2
Review the summary information and choose whether you want to bring the
WAC resources online when VCS starts and then click Configure.
3
Click Finish to exit the wizard.
About configuring a cluster from the command line
VCS provides a silent configuration utility, VCWsilent.exe, which enables you to
perform the following tasks:
■
Configure a new cluster
■
Delete an existing cluster
■
Re-configure a cluster for single sign-on authentication
You can use the silent configuration utility to perform one of these tasks only on
one cluster at a time.
About preparing for a silent configuration
To configure or delete a cluster, the silent configuration utility requires an XML
configuration file that contains information about the cluster. No such file is required
when re-configuring a cluster for single sign-on authentication.
About configuring a non-secure cluster
The XML file must have the following format for configuring a non-secure cluster:
<Operation Type="New">
<Domain Name="domain_name">
<SystemList>
<System Name="sys_name1"/>
<System Name="sys_name2"/>
....
....
</SystemList>
<Cluster Name="clus_name" ID="clus_ID" SingleNode="SingleNodeValue">
<Node Name="sys_name1">
Getting started with VCS
About configuring a cluster from the command line
92
<LLTLink Name="adp_name_1" MAC="MAC_address_1"
LowPri="pri"/>
<LLTLink Name="adp_name_2"
MAC="MAC_address_2" LowPri="pri"/>
</Node>
<Node Name="sys_name2">
<LLTLink Name="adp_name_1"
MAC="MAC_address_1" LowPri="pri"/>
<LLTLink Name="adp_name_2"
MAC="MAC_address_2" LowPri="pri"/>
</Node>
....
....
<Security Type="Non-Secured">
<Admin User="admin_user_name" Password="password"/>
</Security>
<HadHelperUser Name="HAD_user_name" Password="password"/>
</Cluster>
</Domain>
</Operation>
About configuring a secure cluster
The XML file must have the following format for configuring a secure cluster:
<Operation Type="New">
<Domain Name="domain_name">
<SystemList>
<System Name="sys_name_1"/>
<System Name="sys_name_2"/>
....
....
</SystemList>
<Cluster Name="clus_name" ID="clus_ID" SingleNode="SingleNodeValue">
<Node Name="node_name_1">
<LLTLink Name="adp_name_1"
MAC="MAC_address_1" LowPri="pri"/>
<LLTLink Name="adp_name_2"
MAC="MAC_address_2" LowPri="pri"/>
</Node>
<Node Name="node_name_2">
<LLTLink Name="adp_name_1"
MAC="MAC_address_1" LowPri="pri"/>
<LLTLink Name="adp_name_2"
Getting started with VCS
About configuring a cluster from the command line
93
MAC="MAC_address_2" LowPri="pri"/>
</Node>
....
....
<Security Type="Secured">
<VxSSRoot Name="root_name"/>
</Security>
<HadHelperUser Name="HAD_user_name" Password="password"/>
</Cluster>
</Domain>
</Operation>
About deleting a non-secure cluster
The XML file must have the following format for deleting a non-secure cluster:
<Operation Type="Delete">
<Domain Name="domain_name">
<SystemList>
<System Name="sys_name1"/>
<System Name="sys_name2"/>
....
....
</SystemList>
<Cluster Name="clus_name" ID="clus_ID"
ConnecttoCluster="ConnecttoClustervalue"
IgnoreOfflineGroups="IgnoreOfflineGroupsvalue">
<Security Type="Non-Secured">
<Admin User="admin_user_name" Password="password"/>
</Security>
<HadHelperUser Remove="Removevalue"
Name="HAD_user_name" Password="password"/>
</Cluster>
</Domain>
</Operation>
About deleting a secure cluster
The XML file must be of the following format for deleting a secure cluster:
<Operation Type="Delete">
<Domain Name="domain_name">
<SystemList>
<System Name="sys_name_1"/>
Getting started with VCS
About configuring a cluster from the command line
<System Name="sys_name_2"/>
....
....
</SystemList>
<Cluster Name="clus_name" ID="clus_ID"
ConnecttoCluster="ConnecttoClustervalue"
IgnoreOfflineGroups="IgnoreOfflineGroupsvalue">
<Security Type="Secured">
<VxSSRoot Name="root_name"/>
</Security>
<HadHelperUser Remove="Removevalue" Name="HAD_user_name"
Password="password"/>
</Cluster>
</Domain>
</Operation>
Copy the relevant format to any text editor and save it with a .xml extension. Replace
the variables, shown in italics, with appropriate values. Review the information
about variables and their possible values.
See “About element attributes values” on page 94.
A sample XML file is included for your reference.
See “About sample XML configuration” on page 97.
About element attributes values
Table 5-1 describes the variables that are used in the XML format and their possible
values:
* "n" is the sequence number for the systems, nodes, adapters, and MAC addresses.
Table 5-1
VCWsilent - variables and values
Variables
Description
domain_name
Replace this variable with the fully qualified name of a domain
in which the systems reside.
sys_name_<n*>
Replace this with name of the system in the domain for which
relevant information will be discovered.
Note: For each system, you must have a System child
element under the SystemList element.
clus_name
Replace this with the name of the cluster to be created.
94
Getting started with VCS
About configuring a cluster from the command line
Table 5-1
VCWsilent - variables and values (continued)
Variables
Description
clus_ID
Replace this with the cluster ID. Make sure you specify a
unique cluster ID between 0 and 65535.
SingleNodeValue
Replace this "1" or "0." The value "1" indicates that it is a
single node cluster. The value "0" indicates that it is a
multi-node cluster.
node_name_<n*>
Replace this with the name of the system that will be part of
the cluster. Make sure that you provide system names from
the list of systems that are specified under the SystemList
element.
For example, if you specified SysA and SysB in the
SystemList element, you can specify one or both the systems
for the node names. However, you should not specify another
system, say SysC, which was not specified in the SystemList
element.
Note: For each node, you must have a Node child element
along with the LLTLink subchild element under the Cluster
element.
adp_name_<n*>
Replace this with the name of the adapter where the LLT link
will be configured.
Note: For each node, you must specify a minimum of two
adapters. Each adapter must be specified as an attribute of
the LLTLink element.
MAC_address_<n*>
Replace this with the MAC address of the adapter.
Pri
Replace this with either "1" or "0." Value "1" indicates that
the adapter is assigned a low priority. Value "0" indicates
otherwise. You can assign a low priority to an adapter to use
it for both private and public network communication.
admin_user_name
Replace this with a user name for the cluster administrator.
You can use this user name to log on to a cluster that uses
Cluster Manager.
Note: This user name is applicable only for a non-secure
cluster.
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Getting started with VCS
About configuring a cluster from the command line
Table 5-1
VCWsilent - variables and values (continued)
Variables
Description
root_name
Replace this with the host name of one of the systems
selected for the cluster configuration. It should be one of the
systems specified for the SystemList element.
Note: This system name is applicable only for a secure
cluster.
HAD_user_name
Replace this with a domain user name in whose context the
VCS Helper service will run. The VCS High Availability
Daemon, which runs in the context of the local system built-in
account, uses the VCS Helper service user context to access
the network.
password
Replace this with an encrypted password.
See “About encrypting passwords” on page 96.
ConnecttoClustervalue
Replace this with "Yes" if you want to connect to the cluster
before you delete it. If the connection fails, the cluster deletion
does not proceed.
The default value is "No." This default value indicates that
the cluster is deleted without connecting to it.
IgnoreOfflineGroupsvalue
Replace this with "Yes" if you wish to delete the cluster along
with the service groups that are configured in the cluster.
The default value is "No". This means that the cluster deletion
does not proceed if there are service groups in the cluster.
Removevalue
Replace this with "Yes" if you want to delete the VCS Helper
Service account along with the cluster.
The default value is "No." This default value indicates that
the VCS Helper account will not be deleted.
About encrypting passwords
Before you specify passwords in the XML configuration file, you must encrypt them
by using the vcsencrypt utility.
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Getting started with VCS
About configuring a cluster from the command line
Note: If User Access Control (UAC) is enabled on Windows Server systems, you
must launch the command prompt in the Run as administrator mode and then run
the commands that are mentioned in this procedure. To launch the command prompt
in the administrator mode, right-click the command prompt shortcut from the
Windows Start menu and click Run as administrator from the context menu.
Perform these steps for all the passwords to be specified in the XML file.
To encrypt a password
1
Run the vcsencrypt utility by typing the following on the command line.
C:\> vcsencrypt -agent
2
The utility prompts you to enter the password twice. Enter the password and
press Enter.
Enter New Password:
Enter Again:
3
The utility encrypts the password and displays the encrypted password.
4
Specify this encrypted password in the XML file.
5
Copy the encrypted password for future reference.
About sample XML configuration
Sample XML configuration files are provided for reference.
For two-node secure cluster configuration:
Use this configuration file to create a secure cluster with systems SYSTEM1 and
SYSTEM2.
<Operation Type="New">
<Domain Name="DOMAIN.com">
<SystemList>
<System Name="SYSTEM1"/>
<System Name="SYSTEM2"/>
</SystemList>
<Cluster Name="MYCLUSTER" ID="0">
<Node Name="SYSTEM1">
<LLTLink Name="Adapter0" MAC="00:03:47:08:91:56"
LowPri="0"/>
<LLTLink Name="Adapter1" MAC="00:03:47:08:91:C6"
LowPri="0"/>
97
Getting started with VCS
About configuring a cluster from the command line
98
</Node>
<Node Name="SYSTEM2">
<LLTLink Name="Adapter0" MAC="00:03:47:08:91:CC"
LowPri="0"/>
<LLTLink Name="Adapter1" MAC="00:03:47:08:94:4E"
LowPri="0"/>
</Node>
<Security Type="Secured">
<VxSSRoot Name="SYSTEM1"/>
</Security>
<HadHelperUser Name="Administrator" Password="hvnTkvK"/>
</Cluster>
</Domain>
</Operation>
For two-node secure cluster deletion:
Use this configuration file to delete a secure cluster with systems SYSTEM1 and
SYSTEM2.
<Operation Type="Delete">
<Domain Name="DOMAIN.com">
<SystemList>
<System Name="SYSTEM1"/>
<System Name="SYSTEM2"/>
</SystemList>
<Cluster Name="MYCLUSTER" ID="0" ConnecttoCluster="No"
IgnoreOfflineGroups="Yes">
<Security Type="Secured">
<VxSSRoot Name="SYSTEM1"/>
</Security>
<HadHelperUser Remove="No" Name="Administrator" Password="hvnTkvK
</Cluster>
</Domain>
</Operation>
Running the silent configuration utility
Review the prerequisites before you run the silent configuration utility,
VCWsilent.exe.
■
If User Access Control (UAC) is enabled on Windows Server systems, you must
launch the command prompt in the administrator mode, and then run the
VCWSilent utility from the command prompt. To launch the command prompt
Getting started with VCS
About configuring a cluster from the command line
in the administrator mode, right-click the command prompt shortcut from the
Windows Start menu and click Run as administrator from the context menu.
■
To configure or delete a cluster, run the utility from any system in the domain,
irrespective of whether the system is part of the cluster.
■
To re-configure a cluster for single sign-on authentication, run the utility from
any node in the cluster.
To run the silent configuration utility
1
At the command line, type one of the following commands as appropriate to
run the VCWsilent utility.
To configure a new cluster or delete an existing cluster, use:
command_prompt> VCWsilent XML_file_name_including_path
To view the progress when configuring or deleting a cluster, use the "-v" option:
command_prompt> VCWsilent XML_file_name_including_path -v
To re-configure a cluster for single sign-on authentication, use:
command_prompt> VCWsilent -upgrade
2
If the cluster is successfully configured or deleted, the following message
appears:
Silent configuration was successful.
If the silent configuration fails, an error message appears. Review the message
associated with the failure and rerun the utility after you rectify the problem.
99
Chapter
Administering the cluster
from Cluster Manager (Java
console)
This chapter includes the following topics:
■
About the Cluster Manager (Java Console)
■
Getting started prerequisites
■
Components of the Java Console
■
About Cluster Monitor
■
About Cluster Explorer
■
Accessing additional features of the Java Console
■
Administering Cluster Monitor
■
Administering user profiles
■
Administering service groups
■
Administering resources
■
Administering systems
■
Administering clusters
■
Running commands
■
Editing attributes
■
Querying the cluster configuration
6
Administering the cluster from Cluster Manager (Java console)
About the Cluster Manager (Java Console)
■
Setting up VCS event notification by using the Notifier wizard
■
Administering logs
■
Administering VCS Simulator
About the Cluster Manager (Java Console)
The Cluster Manager (Java Console) offers complete administration capabilities
for your cluster. Use the different views in the Java Console to monitor clusters and
VCS objects, including service groups, systems, resources, and resource types.
Many of the operations that the Java Console supports are also supported by the
command line interface and by Veritas Operations Manager.
The console enables or disables features depending on whether the features are
supported in the cluster that the console is connected to. For example, the Cluster
Shell icon is not available when you connect to recent versions of VCS. But the
icon is enabled when you connect to earlier versions of a VCS cluster.
You cannot manage new features introduced in releases 6.0 and later with Java
Console.
You can download the Java Console from http://go.symantec.com/vcsm_download.
Symantec recommends use of Veritas Operations Manager to manage Storage
Foundation and Cluster Server environments. Veritas Operations Manager provides
a centralized management console for Veritas Storage Foundation and High
Availability products. You can use Veritas Operations Manager to monitor, visualize,
and manage storage resources and generate reports. Veritas Operations Manager
is not available on the Storage Foundation and High Availability Solutions release
and must be obtained separately. You can download this utility at no charge at
http://go.symantec.com/vom.
Symantec also offers the Veritas Cluster Server (VCS) Management Console to
manage clusters. Refer to the Veritas Cluster Server Management Console
Implementation Guide for installation, upgrade, and configuration instructions.
To download the most current version of VCS Management Console, go to
http://go.symantec.com/vcsm_download.
For information on updates and patches for VCS Management Console, see
http://seer.entsupport.symantec.com/docs/308405.htm.
See “ Components for administering VCS” on page 41.
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Getting started prerequisites
Getting started prerequisites
Following are the prerequisites for getting started with the Cluster Manager (Java
Console):
■
Make sure that you have the current version of Cluster Manager (Java Console)
installed. If you have a previous version installed, upgrade to the latest version.
Cluster Manager (Java Console) is compatible with earlier versions of VCS.
■
Cluster Manager (Java Console) is supported on the following platforms:
Windows XP, Windows Vista, Windows 7, Windows 2003, Windows 2008,
and Windows 2008 R2
If you configured Windows Firewall, add ports 14141 and 14150 to the Exceptions
list.
For a list of SFW HA services and ports used, refer to the Veritas Storage
Foundation and High Availability Solutions for Windows Installation and Upgrade
Guide.
■
■
Verify that the configuration has a user account. A user account is established
during VCS installation that provides immediate access to Cluster Manager. If
a user account does not exist, you must create one.
See “Adding a user” on page 132.
■
Start Cluster Manager.
See “Starting Cluster Manager (Java console)” on page 102.
■
Add a cluster panel.
See “Configuring a new cluster panel” on page 128.
■
Log on to a cluster.
See “Logging on to a cluster and logging off” on page 129.
■
Make sure you have adequate privileges to perform cluster operations.
See “About VCS user privileges and roles” on page 70.
Starting Cluster Manager (Java console)
To start the Java Console on Windows systems
◆
From the Start menu, click Start > All Programs > Symantec > Veritas Cluster
Server > Veritas Cluster Manager - Java Console.
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Components of the Java Console
Components of the Java Console
Cluster Manager (Java Console) offers two windows, Cluster Monitor and Cluster
Explorer, from which most tasks are performed. Use Cluster Manager to manage,
configure, and administer the cluster while VCS is running (online).
The Java Console also enables you to use VCS Simulator on Windows systems.
Use this tool to simulate operations and generate new configuration files (main.cf
and types.cf) while VCS is offline. VCS Simulator enables you to design
configurations that imitate real-life scenarios without test clusters or changes to
existing configurations.
See “ Administering VCS Simulator” on page 180.
Icons in the Java Console
The Java Console uses several icons to communicate information about cluster
objects and their states.
See “Remote cluster states” on page 601.
See “System states” on page 603.
Table 6-1 shows the icons in the Cluster Manager (Java Console).
Table 6-1
Icon
Icons in Cluster Manager (Java Console)
Description
Cluster
System
Service Group
Resource Type
Resource
OFFLINE
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Table 6-1
Icon
Icons in Cluster Manager (Java Console) (continued)
Description
Faulted (in UP BUT NOT IN CLUSTER MEMBERSHIP state)
Faulted (in EXITED state)
PARTIAL
Link Heartbeats (in UP and DOWN states)
UP AND IN JEOPARDY
FROZEN
AUTODISABLED
UNKNOWN
ADMIN_WAIT
Global Service Group (requires the VCS Global Cluster Option)
Remote Cluster in RUNNING state (requires the VCS Global Cluster
Option)
Remote Cluster in EXITING, EXITED, INIT, INQUIRY, LOST_CONN,
LOST_HB, TRANSITIONING, or UNKNOWN state.
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About Cluster Monitor
About Cluster Monitor
After you start Cluster Manager, the first window that appears is Cluster Monitor.
This window includes one or more panels that display general information about
actual or simulated clusters.
You can use Cluster Monitor to perform the following tasks:
■
Log on to a cluster.
■
Log off a cluster.
■
View summary information on various VCS objects.
■
Customize the display.
■
Use VCS Simulator.
■
Exit Cluster Manager.
Figure 6-1 shows the first window of the Veritas Cluster Manager.
Figure 6-1
Starting the Veritas Cluster Server Cluster Manager
Cluster monitor toolbar
The Cluster Monitor toolbar contains several buttons.
Figure 6-2 shows the Cluster Monitor toolbar.
Figure 6-2
The Cluster Monitor toolbar
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About Cluster Monitor
Table 6-2 lists the buttons from left to right as it appears on the Cluster monitor
toolbar.
Table 6-2
Cluster monitor toolbar buttons
Button
Description
New cluster: Adds a new cluster panel to Cluster Monitor
Delete cluster: Removes a cluster panel from Cluster Monitor
Expand: Expands the Cluster Monitor view
Collapse: Pauses cluster panel scrolling
Start: Resumes scrolling
Stop: Pauses cluster panel scrolling
Login: Log on to the cluster shown in the cluster panel
Show Explorer: Launches an additional window of Cluster
Explorer after logging on to that cluster
Move Cluster Panel Up: Moves the selected cluster panel
up
Move Cluster Panel Down: Moves the selected cluster panel
down
Help: Access online help
About cluster monitor panels
To administer a cluster, add a cluster panel or reconfigure an existing cluster panel
in Cluster Monitor. Each panel summarizes the status of the connection and
components of a cluster.
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About Cluster Monitor
Status of the cluster connection with Cluster Monitor
The right pane of a panel in Cluster Monitor displays the status of the connection
to a cluster. An inactive panel appears unavailable until the user logs on and
connects to the cluster. To alter the connection to a cluster, right-click a panel to
access a menu.
Following menus are available:
■
The menu on an active panel enables you to log off a cluster.
■
The menu on an inactive panel enables you to log on to a cluster, configure the
cluster, and delete the cluster from Cluster Monitor.
Menus are enabled when the Cluster Monitor display appears in the default
expanded view. If you activate a menu on a collapsed scrolling view of Cluster
Monitor, the scrolling stops while it accesses the menu.
If the system to which the console is connected goes down, a message notifies you
that the connection to the cluster is lost. Cluster Monitor tries to connect to another
system in the cluster according to the number of failover retries set in the
Connectivity Configuration dialog box. The panels flash until Cluster Monitor is
successfully connected to a different system. If the failover is unsuccessful, a
message notifies you of the failure and the panels becomes unavailable
Monitoring VCS objects with Cluster Monitor
Cluster Monitor summarizes the state of various objects in a cluster and provides
access to in-depth information about these objects in Cluster Explorer. The right
pane of a Cluster Monitor panel displays the connection status (online, offline, up,
or down) of service groups, systems, and heartbeats. The left pane of a Cluster
Monitor panel displays three icons representing service groups, systems, and
heartbeats.
The colors of the icons indicate the state of the cluster:
■
A flashing red slash indicates that the Cluster Manager failed to connect to the
cluster and will attempt to connect to another system in the cluster.
■
A flashing yellow slash indicates that the Cluster Manager is experiencing
problems with the connection to the cluster.
Point to an icon to access the icon’s ScreenTip, which provides additional information
on the specific VCS object.
To review detailed information about VCS objects in Cluster Explorer, Logs, and
Command Center, right-click a panel to access a menu. Menus are enabled when
the Cluster Monitor display appears in the default expanded view. If you activate a
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About Cluster Monitor
menu on a collapsed, scrolling view of Cluster Monitor, the scrolling stops while it
accesses the menu.
Expanding and collapsing the Cluster Monitor display
Cluster Monitor supports two views: expanded (default) and collapsed. The expanded
view shows all cluster panels. The collapsed view shows one cluster panel at a
time as the panels scroll upward.
Operations enabled for the expanded view of cluster panels, such as viewing menus,
are also enabled on the collapsed view after the panels stop scrolling.
Review the action that you must perform for the following operations:
To collapse the Cluster
Monitor view
On the View menu, click Collapse.
or
Click Collapse on the Cluster Monitor toolbar.
To expand the Cluster
Monitor view
On the View menu, click Expand.
or
Click Expand on the Cluster Monitor toolbar.
To pause a scrolling cluster Click the cluster panel.
panel
or
Click Stop on the Cluster Monitor toolbar.
Customizing the Cluster Manager display
Customize the Cluster Manager to display objects according to your preference.
To customize the Cluster Manager display
1
From Cluster Monitor, click Preferences on the File menu. If you use a
Windows system, proceed to step 2. Otherwise, proceed to step 3.
2
In the Look & Feel tab (for Windows systems), do the following:
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3
4
■
Click Native(Windows or Motif) look & feel or Java (Metal) look & feel.
■
Click Apply.
In the Appearance tab, do the following:
■
Click the color (applies to Java (Metal) look & feel).
■
Click an icon size.
■
Select the Show Tooltips check box to enable ToolTips.
■
Select the Remove Cluster Manager colors check box to alter the standard
color scheme.
■
Click Apply.
In the Sound tab, do the following:
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About Cluster Explorer
This tab requires a properly configured sound card.
5
■
Select the Enable Sound check box to associate sound with specific events.
■
Click an event from the Events configuration tree.
■
Click a sound from the Sounds list box.
■
To test the selected sound, click Play.
■
Click Apply.
■
Repeat these steps to enable sound for other events.
After you make your final selection, click OK.
About Cluster Explorer
Cluster Explorer is the main window for cluster administration. From this
window, you can view the status of VCS objects and perform various operations.
Figure 6-3 shows the Cluster explorer window.
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Figure 6-3
Cluster Explorer window
The window is divided into three panes. The top pane includes a toolbar that enables
you to quickly perform frequently used operations. The left pane contains a
configuration tree with three tabs: Service Groups, Systems, and Resource Types.
The right pane contains a panel that displays various views relevant to the object
selected in the configuration tree.
To access Cluster Explorer
1
Log on to the cluster.
2
Click anywhere in the active Cluster Monitor panel.
or
Right-click the selected Cluster Monitor panel and click Explorer View from the
menu.
Cluster Explorer toolbar
The Cluster Explorer toolbar contains 18 buttons.
Note: Some buttons may be disabled depending on the type of cluster (local or
global) and the privileges with which you logged on to the cluster.
Figure 6-4 show the Cluster explorer toolbar.
Figure 6-4
Cluster Explorer toolbar
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About Cluster Explorer
Table 6-3 shows the buttons on the Cluster Explorer toolbar.
left to right:
Table 6-3
Button
Buttons on the Cluster explorer toolbar
Description
Open Configuration. Modifies a read-only configuration to a read-write
file. This enables you to modify the configuration.
Save Configuration. Writes the configuration to disk.
Save and Close Configuration. Writes the configuration to disk as a
read-only file.
Add Service Group. Displays the Add Service Group dialog box.
Add Resource. Displays the Add Resource dialog box.
Add System. Displays the Add System dialog box.
Manage systems for a Service Group. Displays the System Manager
dialog box.
Online Service Group. Displays the Online Service Group dialog box.
Offline Service Group. Displays the Offline Service Group dialog box.
Show Command Center. Enables you to perform many of the same
VCS operations available from the command line.
Show Shell Command Window. Enables you to launch a non-interactive
shell command on cluster systems, and to view the results on a
per-system basis.
Show the Logs. Displays alerts and messages that the VCS engine
generates, VCS agents, and commands issued from the console.
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Table 6-3
Button
Buttons on the Cluster explorer toolbar (continued)
Description
Launch Configuration Wizard. Enables you to create VCS service
groups.
Launch Notifier Resource Configuration Wizard. Enables you to set up
VCS event notification.
Remote Group Resource Configuration Wizard. Enables you to configure
resources to monitor a service group in a remote cluster.
Add/Delete Remote Clusters. Enables you to add and remove global
clusters.
Configure Global Groups. Enables you to convert a local service group
to a global group, and vice versa.
Query. Enables you to search the cluster configuration according to
filter criteria.
Virtual Fire Drill. Checks whether a resource can fail over to another
node in the cluster. Requires agents that support the running of virtual
fire drills.
Show Cluster Explorer Help. Enables you to access online help.
Cluster Explorer configuration tree
The Cluster Explorer configuration tree is a tabbed display of VCS objects.
The tabs are as follows:
■
The Service Groups tab lists the service groups in the cluster. Expand each
service group to view the group’s resource types and resources.
■
The Systems tab lists the systems in the cluster.
■
The Types tab lists the resource types in the cluster
Cluster Explorer view panel
The right pane of the Cluster Explorer includes a view panel that provides detailed
information about the object selected in the configuration tree. The information is
presented in tabular or graphical format. Use the tabs in the view panel to access
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a particular view. The console enables you to "tear off" each view to appear in a
separate window.
■
Click any object in the configuration tree to access the Status View and Properties
View.
■
Click a cluster in the configuration tree to access the Service Group view, the
System Connectivity view, and the Remote Cluster Status View (for global
clusters only).
■
Click a service group in the configuration tree to access the Resource view.
To create a tear-off view
On the View menu, click Tear Off, and click the appropriate view from the menu.
or
Right-click the object in the configuration tree, click View, and click the appropriate
view from the menu.
Status view
The Status View summarizes the state of the object selected in the configuration
tree. Use this view to monitor the overall status of a cluster, system, service group,
resource type, and resource.
For example, if a service group is selected in the configuration tree, the Status View
displays the state of the service group and its resources on member systems. It
also displays the last five critical or error logs. Point to an icon in the status table
to open a ScreenTip about the relevant VCS object.
Figure 6-5 shows the status view.
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About Cluster Explorer
Figure 6-5
Status view
For global clusters, this view displays the state of the remote clusters. For global
groups, this view shows the status of the groups on both local and remote clusters.
To access the Status view
1
From Cluster Explorer, click an object in the configuration tree.
2
In the view panel, click the Status tab.
Properties view
The Properties View displays the attributes of VCS objects. These attributes describe
the scope and parameters of a cluster and its components.
Figure 6-6 shows the Properties view.
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About Cluster Explorer
Figure 6-6
Properties view
To view information on an attribute, click the attribute name or the icon in the Help
column of the table.
See “About VCS attributes” on page 60.
By default, this view displays key attributes of the object selected in the configuration
tree. The Properties View for a resource displays key attributes of the resource and
attributes specific to the resource types. It also displays attributes whose values
have been overridden.
See “Overriding resource type static attributes” on page 159.
To view all attributes associated with the selected VCS object, click Show all
attributes.
To access the properties view
1
From Cluster Explorer, click a VCS object in the configuration tree.
2
In the view panel, click the Properties tab.
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Service Group view
The Service Group view displays the service groups and their dependencies in a
cluster. Use the graph and ScreenTips in this view to monitor, create, and disconnect
dependencies. To view the ScreenTips, point to a group icon for information on the
type and state of the group on the cluster systems, and the type of dependency
between the service groups.
Figure 6-7 shows the Service Group view.
Figure 6-7
Service Group view
The line between two service groups represents a dependency, or parent-child
relationship. In VCS, parent service groups depend on child service groups. A
service group can function as a parent and a child.
See “About service group dependencies” on page 415.
The color of the link between service groups indicates different types of
dependencies.
■
A blue link indicates a soft dependency.
■
A red link indicates a firm dependency.
■
A green link indicates a hard dependency typically used with VVR in disaster
recovery configurations.
To access the Service Group view
1
From Cluster Explorer, click a cluster in the configuration tree.
2
In the view panel, click the Service Groups tab.
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Resource view
The Resource view displays the resources in a service group. Use the graph and
ScreenTips in this view to monitor the dependencies between resources and the
status of the service group on all or individual systems in a cluster.
Figure 6-8 shows the Resource view.
Figure 6-8
Resource view
In the graph, the line between two resources represents a dependency, or
parent-child relationship. Resource dependencies specify the order in which
resources are brought online and taken offline. During a failover process, the
resources closest to the top of the graph must be taken offline before the resources
linked to them are taken offline. Similarly, the resources that appear closest to the
bottom of the graph must be brought online before the resources linked to them
can come online.
■
A resource that depends on other resources is a parent resource. The graph
links a parent resource icon to a child resource icon below it. Root resources
(resources without parents) are displayed in the top row.
■
A resource on which the other resources depend is a child resource. The graph
links a child resource icon to a parent resource icon above it.
■
A resource can function as a parent and a child.
Point to a resource icon to display ScreenTips about the type, state, and key
attributes of the resource. The state of the resource reflects the state on a specified
system (local).
In the bottom pane of the Resource view, point to the system and service group
icons to display ScreenTips about the service group status on all or individual
systems in a cluster. Click a system icon to view the resource graph of the service
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group on the system. Click the service group icon to view the resource graph on
all systems in the cluster.
To access the Resource view
1
From Cluster Explorer, click the service groups tab in the configuration tree.
2
Click a service group in the configuration tree.
3
In the view panel, click the Resources tab.
Moving and linking icons in Service Group and Resource views
Figure 6-9 shows the Link and Auto Arrange buttons that are available in the top
right corner of the Service Group or Resource view.
Figure 6-9
The Link and Auto Arrange buttons
Click Link to set or disable the link mode for the Service Group and Resource views.
Note: There are alternative ways to set up dependency links without using the Link
button.
The link mode enables you to create a dependency link by clicking on the parent
icon, dragging the yellow line to the icon that will serve as the child, and then clicking
the child icon. Use the Esc key to delete the yellow dependency line connecting
the parent and child during the process of linking the two icons.
If the Link mode is not activated, click and drag an icon along a horizontal plane to
move the icon. Click Auto Arrange to reset the appearance of the graph. The view
resets the arrangement of icons after the addition or deletion of a resource, service
group, or dependency link. Changes in the Resource and Service Group views will
be maintained after the user logs off and logs on to the Java Console at a later
time.
Zooming in on Service Group and Resource views
The Resource view and Service Group view include a navigator tool to zoom in or
out of their graphs.
Figure 6-10 shows the magnifying glass icon in the top right corner to open the
zoom panel.
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Figure 6-10
Zoom panel
■
To move the view to the left or right, click a distance (in pixels) from the
drop-down list box between the hand icons. Click the <- or -> hand icon to move
the view in the desired direction.
■
To shrink or enlarge the view, click a size factor from the drop-down list box
between the magnifying glass icons. Click the - or + magnifying glass icon to
modify the size of the view.
■
To view a segment of the graph, point to the box to the right of the + magnifying
glass icon. Use the red outline in this box to encompass the appropriate segment
of the graph. Click the newly outlined area to view the segment.
■
To return to the original view, click the magnifying glass icon labeled 1.
System Connectivity view
Figure 6-11 shows the System Connectivity view that displays the status of system
connections in a cluster. Use this view to monitor the system links and heartbeats.
Figure 6-11
The System Connectivity view
VCS monitors systems and their services over a private network. The systems
communicate via heartbeats over an additional private network, which enables them
to recognize which systems are active members of the cluster, which are joining or
leaving the cluster, and which have failed.
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About Cluster Explorer
VCS protects against network failure by requiring that all systems be connected by
two or more communication channels. When a system is down to a single heartbeat
connection, VCS can no longer differentiate between the loss of a system and the
loss of a network connection. This situation is referred to as jeopardy.
Point to a system icon to display a ScreenTip on the links and heartbeats. If a
system in the cluster is experiencing a problem connecting to other systems, the
system icon changes its appearance to indicate the link is down. In this situation,
a jeopardy warning may appear in the ScreenTip for this system.
To access the System Connectivity view
1
From Cluster Explorer, click a cluster in the configuration tree.
2
In the view panel, click the System Connectivity tab.
Remote Cluster Status view
This view requires the VCS Global Cluster Option.
Figure 6-12 shows the Remote Cluster Status View that provides an overview of
the clusters and global groups in a global cluster environment. Use this view to view
the name, address, and status of a cluster, and the type (Icmp or IcmpS) and state
of a heartbeat.
Figure 6-12
Remote Cluster Status View
This view enables you to declare a remote cluster fault as a disaster, disconnect,
or outage. Point to a table cell to view information about the VCS object.
To access the Remote Cluster Status view
1
From Cluster Explorer, click a cluster in the configuration tree.
2
In the view panel, click the Remote Cluster Status tab.
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Accessing additional features of the Java Console
Accessing additional features of the Java Console
Use Cluster Manager to access the Template View, System Manager, User Manager,
Command Center, Configuration Wizard, Notifier Resource Configuration Wizard,
Remote Group Resource Configuration Wizard, Query Module, and Logs.
You can also use the Cluster Manager to run virtual fire drills (or HA fire drills) to
check for any configurational discrepancies that might prevent a service group from
coming online on a specific node.
Template view
The Template View displays the service group templates available in VCS.
Templates are predefined service groups that define the resources, resource
attributes, and dependencies within the service group. Use this view to add service
groups to the cluster configuration, and copy the resources within a service group
template to existing service groups.
In this window, the left pane displays the templates available on the system to which
Cluster Manager is connected. The right pane displays the selected template’s
resource dependency graph.
Template files conform to the VCS configuration language and contain the extension
.tf. These files reside in the VCS configuration directory.
Figure 6-13 shows the Template view.
Figure 6-13
Template view
To access the template view
From Cluster Explorer, click Templates on the Tools menu.
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Accessing additional features of the Java Console
System Manager
Use System Manager to add and remove systems in a service group’s system list.
A priority number (starting with 0) is assigned to indicate the order of systems on
which the service group will start in case of a failover. If necessary, double-click
the entry in the Priority column to enter a new value. Select the Startup check box
to add the systems to the service groups AutoStartList attribute. This enables the
service group to automatically come online on a system every time HAD is started.
To access system Manager
From Cluster Explorer, click the service group in the configuration tree, and click
System Manager on the Tools menu.
or
In the Service Groups tab of the Cluster Explorer configuration tree, click a service
group, and click Manage systems for a Service Group on the toolbar.
User Manager
User Manager enables you to add and delete user profiles and to change user
privileges. If VCS is not running in secure mode, User Manager enables you to
change user passwords. You must be logged in as Cluster Administrator to access
User Manager.
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Accessing additional features of the Java Console
To access user Manager
From Cluster Explorer, click User Manager on the File menu.
Command Center
Command Center enables you to build and execute VCS commands; most
commands that are executed from the command line can also be executed through
this window. The left pane of the window displays a Commands tree of all VCS
operations. The right pane displays a view panel that describes the selected
command. The bottom pane displays the commands being executed.
The commands tree is organized into Configuration and Operations folders. Click
the icon to the left of the Configuration or Operations folder to view its subfolders
and command information in the right pane. Point to an entry in the commands tree
to display information about the selected command.
Figure 6-14 shows the Command center window.
Figure 6-14
Command center window
To access Command Center
From Cluster Explorer, click Command Center on the Tools menu.
or
On the Cluster Explorer toolbar, click Show Command Center.
Configuration wizard
Use Configuration Wizard to create and assign service groups to systems in a
cluster.
See “Creating service groups with the configuration wizard” on page 149.
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Accessing additional features of the Java Console
To access Configuration Wizard
From Cluster Explorer, click Configuration Wizard on the Tools menu.
or
On the Cluster Explorer toolbar, click Launch Configuration Wizard.
Notifier Resource Configuration wizard
VCS provides a method for notifying an administrator of important events such as
a resource or system fault. VCS includes a "notifier" component, which consists of
the notifier daemon and the hanotify utility. This wizard enables you to configure
the notifier component as a resource of type NotifierMngr as part of the
ClusterService group.
See “Setting up VCS event notification by using the Notifier wizard” on page 173.
To access Notifier Resource Configuration Wizard
From Cluster Explorer, click Notifier Wizard on the Tools menu.
or
On the Cluster Explorer toolbar, click Launch Notifier Resource Configuration
Wizard.
Remote Group Resource Configuration Wizard
A RemoteGroup resource enables you to manage or monitor remote service groups
from a local cluster. For each service group running in a remote cluster, you can
create a corresponding RemoteGroup resource in the local cluster.
See “Adding a RemoteGroup resource from the Java Console” on page 154.
To access Remote Group Resource Configuration Wizard
From Cluster Explorer, click Remote Group Resource Wizard... on the Tools
menu.
or
On the Cluster Explorer toolbar, click Configure Remote Group Resource Wizard.
Cluster query
Use Cluster Query to run SQL-like queries from Cluster Explorer. VCS objects that
can be queried include service groups, systems, resources, and resource types.
Some queries can be customized, including searching for the system’s online group
count and specific resource attributes.
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See “Querying the cluster configuration” on page 172.
To access the Query dialog box
From Cluster Explorer, click Query on the Tools menu.
or
In the Cluster Explorer toolbar, click Query.
Logs
The Logs dialog box displays the log messages generated by the VCS engine, VCS
agents, and commands issued from Cluster Manager to the cluster. Use this dialog
box to monitor and take actions on alerts on faulted global clusters and failed service
group failover attempts.
Note: To ensure the time stamps for engine log messages are accurate, make sure
to set the time zone of the system running the Java Console to the same time zone
as the system running the VCS engine.
■
Click the VCS Logs tab to view the log type, time, and details of an event. Each
message presents an icon in the first column of the table to indicate the message
type. Use this window to customize the display of messages by setting filter
criteria.
■
Click the Agent Logs tab to display logs according to system, resource type,
and resource filter criteria. Use this tab to view the log type, time, and details of
an agent event.
■
Click the Command Logs tab to view the status (success or failure), time,
command ID, and details of a command. The Command Log only displays
commands issued in the current session.
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■
Click the Alerts tab to view situations that may require administrative action.
Alerts are generated when a local group cannot fail over to any system in the
local cluster, a global group cannot fail over, or a cluster fault takes place. A
current alert will also appear as a pop-up window when you log on to a cluster
through the console.
To access the Logs dialog box
From Cluster Explorer, click Logs on the View menu.
or
On the Cluster Explorer toolbar, click Show the Logs.
Server and user credentials
If VCS is running in secure mode, you can view server and user credentials used
to connect to the cluster from Cluster Explorer.
To view user credentials
From Cluster Explorer, click User Credentials on the View menu.
To view server credentials
From Cluster Explorer, click Server Credentials on the View menu.
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Administering Cluster Monitor
Use the Java Console to administer a cluster or simulated cluster by adding or
reconfiguring a cluster panel in Cluster Monitor. To activate the connection to the
newly added cluster, complete the following procedure and then click on the newly
created connection to log in.
Configuring a new cluster panel
You must add a cluster panel for each cluster that you wish to connect to using the
Java GUI.
To configure a new cluster panel
1
From Cluster Monitor, click New Cluster on the File menu. For simulated
clusters, click New Simulator on the File menu.
or
Click New Cluster on the Cluster Monitor toolbar.
2
Enter the details to connect to the cluster:
■
Enter the host name or IP address of a system in the cluster.
■
If necessary, change the default port number of 14141; VCS Simulator uses
a default port number of 14153. Note that you must use a different port to
connect to each Simulator instance, even if these instances are running on
the same system.
■
Enter the number of failover retries. VCS sets the default failover retries
number to 12.
■
For simulated clusters, click the platform for the configuration.
■
Click OK. An inactive panel appears in Cluster Monitor.
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Modifying a cluster panel configuration
Modify a cluster panel to point to another cluster, to change the port number, or the
number of failover retries.
1
If Cluster Monitor is in the default expanded state, proceed to step 2. If Cluster
Monitor is in the collapsed state:
On the View menu, click Expand.
or
On the View menu, click Stop when an active panel appears as the view panel.
2
Right-click the cluster panel. If the panel is inactive, proceed to step 4.
3
On the menu, click Logout. The cluster panel becomes inactive.
4
Right-click the inactive panel, and click Configure...
5
Edit the details to connect to the cluster:
■
Enter the host name or IP address of any system in the cluster.
■
Enter the port number and the number of failover retries. VCS sets the
default port number to 14141 and failover retries number to 12; VCS
Simulator uses a default port number of 14153.
■
For simulated panels, click the platform for the configuration.
■
Click OK.
Logging on to a cluster and logging off
After you add or configure a cluster panel in Cluster Monitor, click on the panel to
log on to the cluster and access Cluster Explorer. Use Cluster Monitor to log off the
cluster when you have completed administering the cluster.
Logging on to a cluster
This topic describes how to log on to a cluster.
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1
If Cluster Monitor is in the default expanded state, proceed to step 2. If Cluster
Monitor is in the collapsed state:
On the View menu, click Expand.
or
On the View menu, click Stop when an active panel appears as the view panel.
2
Click the panel that represents the cluster you want to log on to.
or
If the appropriate panel is highlighted, click Login on the File menu.
3
Enter the information for the user:
If the cluster is not running in secure mode:
■
Enter the VCS user name and password.
■
Click OK.
If the cluster is running in secure mode:
■
Enter the credentials of a native user.
You can use nis or nis+ accounts or accounts set up on the local system.
If you do not enter the name of the domain, VCS assumes the domain is
the local system.
If the user does not have root privileges on the system, VCS assigns guest
privileges to the user. To override these privileges, add the domain user to
the VCS administrators’ list.
See “Administering user profiles” on page 131.
■
The Java Console connects to the cluster using the authentication broker
and the domain type provided by the engine. To change the authentication
broker or the domain type, click Advanced.
See “About security services” on page 40.
Select a new broker and domain type, as required.
■
Click OK.
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■
The Server Credentials dialog box displays the credentials of the cluster
service to which the console is connected.
To disable this dialog box from being displayed every time you connect to
the cluster, select the Do not show during startup check box
■
Click OK to connect to the cluster.
The animated display shows various objects, such as service groups and
resources, being transferred from the server to the console.
Cluster Explorer is launched automatically upon initial logon, and the icons in
the cluster panel change color to indicate an active panel.
Logging off a cluster
To log off a cluster, follow these steps:
1
If Cluster Monitor is in the default expanded state, proceed to step 2. If Cluster
Monitor is in the collapsed state:
On the View menu, click Expand.
or
On the View menu, click Stop when an active panel appears as the view panel.
2
Right-click the active panel, and click Logout.
or
If the appropriate panel is highlighted, click Logout on the File menu.
Cluster Explorer closes and the Cluster Monitor panel becomes inactive. You
may be prompted to save the configuration if any commands were executed
on the cluster.
To log off from Cluster Explorer
Click Log Out on the File menu.
Administering user profiles
The Java Console enables a user with Cluster Administrator privileges to add,
modify, and delete user profiles. The icon next to each user name in the User
Manager dialog box indicates privileges for each user. Administrator and Operator
privileges are separated into the cluster and group levels.
See “About VCS user privileges and roles” on page 70.
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Adding a user
To add a user, follow these steps:
1
From Cluster Explorer, click User Manager on the File menu.
2
In the User Manager dialog box, click New User.
3
In the Add User dialog box:
4
■
Enter the name of the user.
■
If the cluster is not running in secure mode, enter a password for the user
and confirm it.
■
Select the appropriate check boxes to grant privileges to the user. To grant
Group Administrator or Group Operator privileges, proceed to step the next
step. Otherwise, proceed to the last step.
■
Click Select Groups...
■
Click the groups for which you want to grant privileges to the user and click
the right arrow to move the groups to the Selected Groups box.
■
Click OK to exit the Select Group dialog box, then click OK again to exit
the Add User dialog box.
Click Close.
Deleting a user
To delete a user, follow these steps:
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1
From Cluster Explorer, click User Manager on the File menu.
2
In the User Manager dialog box, click the user name.
3
Click Remove User.
4
Click Yes.
5
Click Close.
Changing a user password
A user with Administrator, Operator, or Guest privileges can change his or her own
password. You must be logged on as Cluster Administrator to access User Manager.
Before changing the password, make sure the configuration is in the read-write
mode. Cluster administrators can change the configuration to the read-write mode.
Note: This module is not available if the cluster is running in secure mode.
To change a password as an administrator
1
From Cluster Explorer, click User Manager on the File menu.
2
Click the user name.
3
Click Change Password.
4
In the Change Password dialog box:
5
■
Enter the new password.
■
Re-enter the password in the Confirm Password field.
■
Click OK.
Click Close.
To change a password as an operator or guest
1
From Cluster Explorer, click Change Password on the File menu.
2
In the Change Password dialog box:
3
■
Enter the new password.
■
Reenter the password in the Confirm Password field.
■
Click OK.
Click Close.
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Changing a user privilege
To change a user privilege, follow these steps:
1
From Cluster Explorer, click User Manager on the File menu.
2
Click the user name.
3
Click Change Privileges and enter the details for user privileges:
■
Select the appropriate check boxes to grant privileges to the user. To grant
Group Administrator or Group Operator privileges, proceed to the next step.
Otherwise, proceed to the last step.
■
Click Select Groups.
■
Click the groups for which you want to grant privileges to the user, then
click the right arrow to move the groups to the Selected Groups box.
■
Click OK in the Change Privileges dialog box, then click Close in the User
Manager dialog box.
Assigning privileges for OS user groups for clusters running in secure
mode
For clusters running in secure mode, you can assign privileges to native users at
an operating system (OS) user group level. Assigning VCS privileges to an OS user
group involves adding the user group in one (or more) of the following attributes:
■
AdministratorGroups—for a cluster or for a service group.
■
OperatorGroups—for a cluster or for a service group.
See “User privileges for OS user groups for clusters running in secure mode”
on page 74.
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To assign privileges to an OS user group
1
From Cluster Explorer configuration tree, select the cluster to assign privileges
for the cluster or a service group to assign privileges for specific service groups.
2
From the view panel, click the Properties tab and then click Show all
attributes.
3
From the list of attributes, click the edit icon against AdministratorGroups or
OperatorGroups.
4
In the Edit Attribute dialog box:
■
Use the + button to add an element.
■
Click the newly added element and enter the name of the user group in the
format domain\group.
■
Click OK.
Administering service groups
Use the Java Console to administer service groups in the cluster. Use the console
to add and delete, bring online and take offline, freeze and unfreeze, link and unlink,
enable and disable, autoenable, switch, and flush service groups. You can also
modify the system list for a service group.
Adding a service group
The Java Console provides several ways to add a service group to the systems in
a cluster. Use Cluster Explorer, Command Center, or the Template View to perform
this task.
Cluster Explorer provides several ways to add service groups. A few are explained
in this section.
To add a service group from Cluster Explorer
1
On the Edit menu, click Add, and click Service Group.
or
In the Service Groups tab of the configuration tree, right-click a cluster and
click Add Service Group from the menu.
or
Click Add Service Group in the Cluster Explorer toolbar.
2
Enter the details of the service group:
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■
Enter the name of the service group.
■
In the Available Systems box, click the systems on which the service group
will be added.
■
Click the right arrow to move the selected systems to the Systems for
Service Group box. The priority number (starting with 0) is automatically
assigned to indicate the order of systems on which the service group will
start in case of a failover. If necessary, double-click the entry in the Priority
column to enter a new value.
Select the Startup check box to add the systems to the service groups
AutoStartList attribute. This enables the service group to automatically come
online on a system every time HAD is started.
■
Click the appropriate service group type. A failover service group runs on
only one system at a time; a parallel service group runs concurrently on
multiple systems.
■
To add a new service group based on a template, click Templates...
Otherwise, proceed to the last step in this procedure. (Alternative method
to add a new service group based on a template: From Cluster Explorer,
click Templates on the Tools menu. Right-click the Template View panel,
and click Add as Service Group from the menu.)
■
Click the appropriate template name, then click OK.
■
Click Show Command in the bottom left corner if you want to view the
command associated with the service group. Click Hide Command to close
the view of the command.
■
Click OK.
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To add a service group from Command Center
1
In the Command Center configuration tree, expand Commands >
Configuration > Cluster Objects > Add Service Group.
or
Click Add service group in the Command Center toolbar.
2
Enter the name of the service group.
3
In the Available Systems box, click the systems on which the service group
will be added.
4
Click the right arrow to move the selected systems to the Systems for Service
Group box. The priority number (starting with 0) is automatically assigned to
indicate the order of systems on which the service group will start in case of a
failover. If necessary, double-click the entry in the Priority column to enter a
new value.
Select the Startup check box to add the systems to the service groups
AutoStartList attribute. This enables the service group to automatically come
online on a system every time HAD is started.
5
Click the appropriate service group type. A failover service group runs on only
one system at a time; a parallel service group runs concurrently on multiple
systems.
6
To add a new service group based on a template, click Templates... Otherwise,
proceed to step 9.
7
Click the appropriate template name.
8
Click OK.
9
Click Apply.
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To add a service group from the template view
1
From Cluster Explorer, click Templates... on the Tools menu.
2
Right-click the Template View panel, and click Add as Service Group from
the pop-up menu. This adds the service group template to the cluster
configuration file without associating it to a particular system.
3
Use System Manager to add the service group to systems in the cluster.
See “System Manager” on page 123.
Deleting a service group
Delete a service group from Cluster Explorer or Command Center.
Note: You cannot delete service groups with dependencies. To delete a linked
service group, you must first delete the link.
To delete a service group from Cluster Explorer
1
In the Service Groups tab of the configuration tree, right-click the service
group.
or
Click a cluster in the configuration tree, click the Service Groups tab, and
right-click the service group icon in the view panel.
2
Click Delete from the menu.
3
Click Yes.
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To delete a service group from Command Center
1
In the Command Center configuration tree, expand Commands >
Configuration > Cluster Objects > Delete Service Group.
2
Click the service group.
3
Click Apply.
Bringing a service group online
To bring a service group online, follow these steps:
To bring a service group online from the Cluster Explorer configuration tree
1
In the Service Groups tab of the configuration tree, right-click the service
group.
or
Click a cluster in the configuration tree, click the Service Groups tab, and
right-click the service group icon in the view panel.
2
Click Online, and click the appropriate system from the menu. Click Any
System if you do not need to specify a system.
To bring a service group online from the Cluster Explorer toolbar
1
Click Online Service Group on the Cluster Explorer toolbar.
2
Specify the details for the service group:
■
Click the service group.
■
For global groups, select the cluster in which to bring the group online.
■
Click the system on which to bring the group online, or select the Any
System check box.
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■
Select the No Preonline check box to bring the service group online without
invoking the preonline trigger.
■
Click Show Command in the bottom left corner to view the command
associated with the service group. Click Hide Command to close the view
of the command.
■
Click OK.
To bring a service group online from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Controls > Online Service Group.
or
Click Bring service group online in the Command Center toolbar.
2
Click the service group.
3
For global groups, select the cluster in which to bring the group online.
4
Click the system on which to bring the group online, or select the Any System
check box.
5
Click Apply.
Taking a service group offline
To take a service group offline, follow these steps:
To take a service group offline from Cluster Explorer configuration tree
1
In the Service Groups tab of the configuration tree, right-click the service
group.
or
Click a cluster in the configuration tree, click the Service Groups tab, and
right-click the service group icon in the view panel.
2
Click Offline, and click the appropriate system from the menu. Click All
Systems to take the group offline on all systems.
To take a service group offline from the Cluster Explorer toolbar
1
Click Offline Service Group in the Cluster Explorer toolbar.
2
Enter the details of the service group:
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■
Click the service group.
■
For global groups, select the cluster in which to take the group offline.
■
Click the system on which to take the group offline, or click All Systems.
■
Click Show Command in the bottom left corner if you want to view the
command associated with the service group. Click Hide Command to close
the view of the command.
■
Click OK.
To take a service group offline from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Controls > Offline Service Group.
or
Click Take service group offline in the Command Center toolbar.
2
Click the service group.
3
For global groups, select the cluster in which to take the group offline.
4
Click the system on which to take the group offline, or click the All Systems
check box.
5
Click Apply.
Switching a service group
The process of switching a service group involves taking it offline on its current
system and bringing it online on another system.
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To switch a service group from Cluster Explorer
1
In the Service Groups tab of the configuration tree, right-click the service
group.
or
Click the cluster in the configuration tree, click the Service Groups tab, and
right-click the service group icon in the view panel.
2
Click Switch To, and click the appropriate system from the menu.
To switch a service group from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Controls > Switch Service Group.
2
Click the service group.
3
For global groups, select the cluster in which to switch the service group.
4
Click the system on which to bring the group online, or select the Any System
check box.
5
Click Apply.
Freezing a service group
Freeze a service group to prevent it from failing over to another system. The freezing
process stops all online and offline procedures on the service group. Note that you
cannot freeze a service group when the service group state is in transition.
To freeze a service group from Cluster Explorer
1
In the Service Groups tab of the configuration tree, right-click the service
group.
or
Click the cluster in the configuration tree, click the Service Groups tab, and
right-click the service group icon in the view panel.
2
Click Freeze, and click Temporary or Persistent from the menu. The persistent
option maintains the frozen state after a reboot if you save this change to the
configuration.
To freeze a service group from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Availability > Freeze Service Group.
2
Click the service group.
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3
Select the persistent check box if necessary. The persistent option maintains
the frozen state after a reboot if you save this change to the configuration.
4
Click Apply.
Unfreezing a service group
Unfreeze a frozen service group to perform online or offline operations on the service
group.
To unfreeze a service group from Cluster Explorer
1
In the Service Groups tab of the configuration tree, right-click the service
group.
or
Click the cluster in the configuration tree, click the Service Groups tab, and
right-click the service group icon in the view panel.
2
Click Unfreeze.
To unfreeze a service group from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Availability > Unfreeze Service Group.
2
Click the service group.
3
Click Apply.
Enabling a service group
Enable a service group before bringing it online. A service group that was manually
disabled during a maintenance procedure on a system may need to be brought
online after the procedure is completed.
To enable a service group from Cluster Explorer
1
In the Service Groups tab of the configuration tree, right-click the service
group.
or
Click the cluster in the configuration tree, click the Service Groups tab, and
right-click the service group icon in the view panel.
2
Click Enable, and click the appropriate system from the menu. Click All
Systems to enable the group on all systems.
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To enable a service group from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Availability > Enable Service Group.
2
Click the service group.
3
Select the Per System check box to enable the group on a specific system
instead of all systems.
4
Click Apply.
Disabling a service group
Disable a service group to prevent it from coming online. This process temporarily
stops VCS from monitoring a service group on a system undergoing maintenance
operations.
To disable a service group from Cluster Explorer
1
In the Service Groups tab of the configuration tree, right-click the service
group.
or
Click the cluster in the configuration tree, click the Service Groups tab, and
right-click the service group icon in the view panel.
2
Click Disable, and click the appropriate system in the menu. Click All Systems
to disable the group on all systems.
To disable a service group from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Availability > Disable Service Group.
2
Click the service group.
3
Select the Per System check box to disable the group on a specific system
instead of all systems.
4
Click Apply.
Autoenabling a service group
A service group is autodisabled until VCS probes all resources and checks that
they are ready to come online. Autoenable a service group in situations where the
VCS engine is not running on one of the systems in the cluster, and you must
override the disabled state of the service group to enable the group on another
system in the cluster.
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To autoenable a service group from Cluster Explorer
1
In the Service Groups tab of the configuration tree, right-click the service
group.
or
Click the cluster in the configuration tree, click the Service Groups tab, and
right-click the service group icon in the view panel.
2
Click Autoenable, and click the appropriate system from the menu.
To autoenable a service group from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Availability > Autoenable Service Group.
2
Click the service group.
3
Click the system on which to autoenable the group.
4
Click Apply.
Flushing a service group
When a service group is brought online or taken offline, the resources within the
group are brought online or taken offline. If the online operation or offline operation
hangs on a particular resource, flush the service group to clear the WAITING TO
GO ONLINE or WAITING TO GO OFFLINE states from its resources. Flushing a
service group typically leaves the service group in a partial state. After you complete
this process, resolve the issue with the particular resource (if necessary) and proceed
with starting or stopping the service group.
Note: The flush operation does not halt the resource operations (such as online,
offline, and clean) that are running. If a running operation succeeds after a flush
command was fired, the resource state might change depending on the operation.
To flush a service group from Cluster Explorer
1
In the Service Groups tab of the configuration tree, right-click the service
group.
or
Click the cluster in the configuration tree, click the Service Groups tab, and
right-click the service group icon in the view panel.
2
Click Flush, and click the appropriate system from the menu.
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To flush a service group from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Availability > Flush Service Group.
2
Click the service group.
3
Click the system on which to flush the service group.
4
Click Apply.
Linking service groups
This topic describes how to link service groups.
To link a service group from Cluster Explorer
1
Click a cluster in the configuration tree.
2
In the View panel, click the Service Groups tab. This opens the service group
dependency graph. To link a parent group with a child group:
■
Click Link.
■
Click the parent group.
■
Move the mouse toward the child group. The yellow line "snaps" to the child
group. If necessary, press Esc on the keyboard to delete the line between
the parent and the pointer before it snaps to the child.
■
Click the child group.
■
In the Link Service Groups dialog box, click the group relationship and
dependency type.
See “About service group dependencies” on page 415.
■
Click OK.
You can also link the service groups by performing steps 1 and 2, right-clicking
the parent group, and clicking Link from the menu. In the dialog box, click the
child group, relationship, dependency type, and click OK.
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To link a service group from Command Center
1
In the Command Center configuration tree, expand Commands >
Configuration > Dependencies > Link Service Groups.
2
Click the parent resource group in the Service Groups box. After selecting
the parent group, the potential groups that can serve as child groups are
displayed in the Child Service Groups box.
3
Click a child service group.
4
Click the group relationship and dependency type.
See “About service group dependencies” on page 415.
5
Click Apply.
Unlinking service groups
To unlink service groups, follow these steps:
To delete a service group dependency from Cluster Explorer
1
Click a cluster in the configuration tree.
2
In the view panel, click the Service Groups tab.
3
In the Service Group view, right-click the link between the service groups.
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4
Click Unlink from the menu.
5
Click Yes.
To delete a service group dependency from Command Center
1
In the Command Center configuration tree, expand Commands >
Configuration > Dependencies > Unlink Service Groups.
2
Click the parent resource group in the Service Groups box. After selecting
the parent group, the corresponding child groups are displayed in the Child
Service Groups box.
3
Click the child service group.
4
Click Apply.
Managing systems for a service group
From Cluster Explorer, use System Manager to add and remove systems in a
service group’s system list.
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To add a system to the service group’s system list
1
In the System Manager dialog box, click the system in the Available Systems
box.
2
Click the right arrow to move the available system to the Systems for Service
Group table.
3
Select the Startup check box to add the systems to the service groups
AutoStartList attribute. This enables the service group to automatically come
online on a system every time HAD is started.
4
The priority number (starting with 0) is assigned to indicate the order of systems
on which the service group will start in case of a failover. If necessary,
double-click the entry in the Priority column to enter a new value.
5
Click OK.
To remove a system from the service group’s system list
1
In the System Manager dialog box, click the system in the Systems for Service
Group table.
2
Click the left arrow to move the system to the Available Systems box.
3
Click OK.
Creating service groups with the configuration wizard
This section describes how to create service groups using the configuration wizard.
To create a service group using the configuration wizard
1
Open the Configuration Wizard. From Cluster Explorer, click Configuration
Wizard on the Tools menu.
2
Read the information on the Welcome dialog box and click Next.
3
Specify the name and target systems for the service group:
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■
Enter the name of the group.
■
Click the target systems in the Available Systems box.
■
Click the right arrow to move the systems to the Systems for Service
Group table. To remove a system from the table, click the system and click
the left arrow.
■
Select the Startup check box to add the systems to the service groups
AutoStartList attribute. This enables the service group to automatically come
online on a system every time HAD is started.
■
The priority number (starting with 0) is automatically assigned to indicate
the order of systems on which the service group will start in case of a
failover. If necessary, double-click the entry in the Priority column to enter
a new value.
■
Click the service group type.
■
Click Next.
4
Click Next again to configure the service group with a template and proceed
to 7. Click Finish to add an empty service group to the selected cluster systems
and configure it at a later time.
5
Click the template on which to base the new service group. The Templates
box lists the templates available on the system to which Cluster Manager is
connected. The resource dependency graph of the templates, the number of
resources, and the resource types are also displayed. Click Next.
6
If a window notifies you that the name of the service group or resource within
the service group is already in use, proceed to 9.
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7
Click Next to apply all of the new names listed in the table to resolve the name
clash.
or
Modify the clashing names by entering text in the field next to the Apply button,
clicking the location of the text for each name from the Correction drop-down
list box, clicking Apply, and clicking Next.
8
Click Next to create the service group. A progress indicator displays the status.
9
After the service group is successfully created, click Next to edit attributes
using the wizard. Click Finish to edit attributes at a later time using Cluster
Explorer.
10 Review the attributes associated with the resources of the service group. If
necessary, proceed to 11 to modify the default values of the attributes.
Otherwise, proceed to 12 to accept the default values and complete the
configuration.
11 Modify the values of the attributes (if necessary).
■
Click the resource.
■
Click the attribute to be modified.
■
Click the Edit icon at the end of the table row.
■
In the Edit Attribute dialog box, enter the attribute values.
■
Click OK.
■
Repeat the procedure for each resource and attribute.
12 Click Finish.
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Administering resources
Use the Java Console to administer resources in the cluster. Use the console to
add and delete, bring online and take offline, probe, enable and disable, clear, and
link and unlink resources. You can also import resource types to the configuration.
Adding a resource
The Java Console provides several ways to add a resource to a service group. Use
Cluster Explorer or Command Center to perform this task.
To add a resource from Cluster Explorer
1
In the Service Groups tab of the Cluster Explorer configuration tree, click a
service group to which the resource will be added.
2
On the Edit menu, click Add, and click Resource.
or
Click Add Resource in the Cluster Explorer toolbar.
3
Enter the details of the resource:
■
Enter the name of the resource.
■
Click the resource type.
■
Edit resource attributes according to your configuration. The Java Console
also enables you to edit attributes after adding the resource.
■
Select the Critical and Enabled check boxes, if applicable. The Critical
option is selected by default.
A critical resource indicates the service group is faulted when the resource,
or any resource it depends on, faults. An enabled resource indicates agents
monitor the resource; you must specify the values of mandatory attributes
before enabling a resource. If a resource is created dynamically while VCS
is running, you must enable the resource before VCS monitors it. VCS will
not bring a disabled resource nor its children online, even if the children
are enabled.
■
Click Show Command in the bottom left corner to view the command
associated with the resource. Click Hide Command to close the view of
the command.
■
Click OK.
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To add a resource from Command Center
1
In the Command Center configuration tree, expand Commands >
Configuration > Cluster Objects > Add Resource.
or
Click Add resource in the Command Center toolbar.
2
Select the service group to contain the resource.
3
Enter the name of the resource.
4
Click the resource type.
5
Edit resource attributes according to your configuration. The Java Console
also enables you to edit attributes after adding the resource.
6
Select the Critical and Enabled check boxes, if applicable. The Critical option
is selected by default.
A critical resource indicates the service group is faulted when the resource, or
any resource it depends on, faults. An enabled resource indicates agents
monitor the resource; you must specify the values of mandatory attributes
before enabling a resource. If a resource is created dynamically while VCS is
running, you must enable the resource before VCS monitors it. VCS will not
bring a disabled resource nor its children online, even if the children are
enabled.
7
Click Apply.
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To add a resource from the Template view
1
From Cluster Explorer, click Templates... on the Tools menu.
2
In the left pane of the Template View, click the template from which to add
resources to your configuration.
3
In the resource graph, right-click the resource to be added to your configuration.
4
Click Copy, and click Self from the menu to copy the resource. Click Copy,
and click Self and Child Nodes from the menu to copy the resource with its
dependent resources.
5
In the Service Groups tab of the Cluster Explorer configuration tree, click the
service group to which to add the resources.
6
In the Cluster Explorer view panel, click the Resources tab.
7
Right-click the Resource view panel and click Paste from the menu. After the
resources are added to the service group, edit the attributes to configure the
resources.
Adding a RemoteGroup resource from the Java Console
A RemoteGroup resource is typically useful in scenarios where resources configured
in a local service group are dependant on the state of a remote service group. For
example, a web-server application running in a local cluster could be dependant
on a database application running in a remote cluster.
Note: The RemoteGroup agent represents that state of a failover service group;
the agent is not supported with parallel service groups.
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A RemoteGroup resource monitors the state of a remote service group in a local
cluster. Once you have added the RemoteGroup resource to a local service group,
you can link the resource to the existing resources of the service group.
You must have administrative privileges to configure RemoteGroup resources.
To add a RemoteGroup resource
1
On the Tools menu, click Add Remote Group Resource...
or
Click Configure Remote Group Resource Wizard in the Cluster Explorer
toolbar.
2
Read the information on the Welcome dialog box and click Next.
3
In the Remote Group Resource Name dialog box, specify the name of the
resource and the service group to which the resource will be added. Click Next.
4
In the Remote Cluster Information dialog box:
■
Specify the name or IP address of a node in the remote cluster.
■
Specify the port on the remote node on which the resource will communicate.
■
Specify a username for the remote cluster.
■
Specify a password for the user.
■
Select the check box if you wish to specify advance options to connect to
a cluster running in secure mode. Otherwise, click Next and proceed to the
last step.
■
5
■
Specify the domain of which the node is a part.
■
Select a domain type.
■
Specify the authentication broker and port.
Click Next.
In the Remote Group Resource Details dialog box, do the following:
■
Select a group you wish to monitor.
■
Select the mode of monitoring.
■
Choose the MonitorOnly option to monitor the remote service group.
You will not be able to perform online or offline operations on the remote
group.
■
Choose the OnlineOnly option to monitor the remote service group and
bring the remote group online from the local cluster.
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■
■
■
Choose the OnOff option to monitor the remote service group, bring
the remote group online, and take it offline from the local cluster.
Specify whether the RemoteGroup resource should monitor the state of
the remote group on a specific system or any system in the remote cluster.
■
Choose the Any System option to enable the RemoteGroup resource
to monitor the state of the remote service group irrespective of the
system on which it is online.
■
Choose the Specific System option to enable the RemoteGroup
resource to monitor the state of the remote group on a specific system
in the remote cluster. You must configure both service groups on the
same number of systems.
This option provides one-to-one mapping between the local and remote
systems. The Local Systems list displays the systems on which the
RemoteGroup resource is configured. Click the fields under the Remote
Systems list and select the systems from drop-down list. If the remote
group fails over to another system in the remote cluster, the
RemoteGroup resource also will fail over to the corresponding system
in the local cluster.
Click Next.
6
Review the text in the dialog box and click Finish to add the RemoteGroup
resource to the specified service group in the local cluster.
7
Create dependencies between the RemoteGroup resource and the existing
resources of the service group.
See “Linking resources” on page 162.
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Deleting a resource
This topic describes how to delete a resource.
To delete a resource from Cluster Explorer
1
In the Service Groups tab of the configuration tree, right-click the resource.
or
Click a service group in the configuration tree, click the Resources tab, and
right-click the resource icon in the view panel.
2
Click Delete from the menu.
3
Click Yes.
To delete a resource from Command Center
1
In the Command Center configuration tree, expand Commands >
Configuration > Cluster Objects > Delete Resource.
2
Click the resource.
3
Click Apply.
Bringing a resource online
This topic describes how to bring a resource offline.
To bring a resource online from Cluster Explorer
1
In the Service Groups tab of the configuration tree, right-click the resource.
or
Click a service group in the configuration tree, click the Resources tab, and
right-click the resource icon in the view panel.
2
Click Online, and click the appropriate system from the menu.
To bring a resource online from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Controls > Online Resource.
2
Click a resource.
3
Click a system on which to bring the resource online.
4
Click Apply.
Taking a resource offline
This topic describes how to take a resource offline.
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To take a resource offline from Cluster Explorer
1
In the Service Groups tab of the configuration tree, right-click the resource.
or
Click a service group in the configuration tree, click the Resources tab, and
right-click the resource icon in the view panel.
2
Click Offline, and click the appropriate system from the menu.
To take a resource offline from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Controls > Offline Resource.
2
Click a resource.
3
Click a system on which to take the resource offline.
4
If necessary, select the ignoreparent check box to take a selected child
resource offline, regardless of the state of the parent resource. This option is
only available through Command Center.
5
Click Apply.
Taking a resource offline and propagating the command
Use the Offline Propagate (OffProp) feature to propagate the offline state of a parent
resource. This command signals that resources dependent on the parent resource
should also be taken offline.
Use the Offline Propagate (OffProp) "ignoreparent" feature to take a selected
resource offline, regardless of the state of the parent resource. This command
propagates the offline state of the selected resource to the child resources. The
"ignoreparent" option is only available in Command Center.
To take a resource and its child resources offline from Cluster Explorer
1
In the Resources tab of the configuration tree, right-click the resource.
2
Click Offline Prop, and click the appropriate system from the menu.
To take a resource and its child resources offline from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Controls > OffProp Resource.
2
Click the resource.
3
Click the system on which to take the resource, and the child resources, offline.
4
Click Apply.
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To take child resources offline from Command Center while ignoring the state of
the parent resource
1
In the Command Center configuration tree, expand Commands > Operations
> Controls > OffProp Resource.
2
Click the resource.
3
Click the system on which to take the resource, and the child resources, offline.
4
Select the ignoreparent check box.
5
Click Apply.
Probing a resource
This topic describes how to probe a resource to check that it is configured. For
example, you might probe a resource to check if it is ready to be brought online.
To probe a resource from Cluster Explorer
1
In the Service Groups tab of the configuration tree, right-click the resource.
2
Click Probe, and click the appropriate system from the menu.
To probe a resource from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Controls > Probe Resource.
2
Click the resource.
3
Click the system on which to probe the resource.
4
Click Apply.
Overriding resource type static attributes
You can override some resource attributes of type static and assign them
resource-specific values. When you override a static attribute and save the
configuration, the main.cf file includes a line in the resource definition for the static
attribute and its overridden value.
To override resource type static attribute
1
Right-click the resource in the Service Groups tab of the configuration tree or
in the Resources tab of the view panel.
2
Click Override Attributes.
3
Select the attributes to override.
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4
Click OK.
The selected attributes appear in the Overridden Attributes table in the
Properties view for the resource.
5
To modify the default value of an overridden attribute, click the icon in the Edit
column of the attribute.
To restore default settings to a type’s static attribute
1
Right-click the resource in the Service Groups tab of the configuration tree or
in the Resources tab of the view panel.
2
Click Remove Attribute Overrides.
3
Select the overridden attributes to be restored to their default settings.
4
Click OK.
Enabling resources in a service group
Enable resources in a service group to bring the disabled resources online. A
resource may have been manually disabled to temporarily stop VCS from monitoring
the resource. You must specify the values of mandatory attributes before enabling
a resource.
To enable an individual resource in a service group
1
From Cluster Explorer, click the Service Groups tab of the configuration tree.
2
Right-click a disabled resource in the configuration tree, and click Enabled
from the menu.
To enable all resources in a service group from Cluster Explorer
1
From Cluster Explorer, click the Service Groups tab in the configuration tree.
2
Right-click the service group.
3
Click Enable Resources.
To enable all resources in a service group from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Availability > Enable Resources for Service Group.
2
Click the service group.
3
Click Apply.
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Disabling resources in a service group
Disable resources in a service group to prevent them from coming online. This
disabling process is useful when you want VCS to temporarily "ignore" resources
(rather than delete them) while the service group is still online.
To disable an individual resource in a service group
1
From Cluster Explorer, click the Service Groups tab in the Cluster Explorer
configuration tree.
2
Right-click a resource in the configuration tree. An enabled resource will display
a check mark next to the Enabled option that appears in the menu.
3
Click Enabled from the menu to clear this option.
To disable all resources in a service group from Cluster Explorer
1
From Cluster Explorer, click the Service Groups tab in the configuration tree.
2
Right-click the service group and click Disable Resources.
To disable all resources in a service group from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Availability > Disable Resources for Service Group.
2
Click the service group.
3
Click Apply.
Clearing a resource
Clear a resource to remove a fault and make the resource available to go online.
A resource fault can occur in a variety of situations, such as a power failure or a
faulty configuration.
To clear a resource from Cluster Explorer
1
In the Service Groups tab of the configuration tree, right-click the resource.
2
Click Clear Fault, and click the system from the menu. Click Auto instead of
a specific system to clear the fault on all systems where the fault occurred.
To clear a resource from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Availability > Clear Resource.
2
Click the resource. To clear the fault on all systems listed in the Systems box,
proceed to step 5. To clear the fault on a specific system, proceed to step 3.
3
Select the Per System check box.
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4
Click the system on which to clear the resource.
5
Click Apply.
Linking resources
Use Cluster Explorer or Command Center to link resources in a service group.
To link resources from Cluster Explorer
1
In the configuration tree, click the Service Groups tab.
2
Click the service group to which the resources belong.
3
In the view panel, click the Resources tab. This opens the resource
dependency graph.
To link a parent resource with a child resource, do the following:
■
Click Link...
■
Click the parent resource.
■
Move the mouse towards the child resource. The yellow line "snaps" to the
child resource. If necessary, press Esc to delete the line between the parent
and the pointer before it snaps to the child.
■
Click the child resource.
■
In the Confirmation dialog box, click Yes.
or
Right-click the parent resource, and click Link from the menu. In the Link
Resources dialog box, click the resource that will serve as the child. Click
OK.
■
Click OK.
To link resources from Command Center
1
In the Command Center configuration tree, expand Commands >
Configuration > Dependencies > Link Resources.
2
Click the service group to contain the linked resources.
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3
Click the parent resource in the Service Group Resources box. After selecting
the parent resource, the potential resources that can serve as child resources
are displayed in the Child Resources box.
4
Click a child resource.
5
Click Apply.
Unlinking resources
Use Cluster Explorer or Command Center to unlink resources in a service group.
To unlink resources from Cluster Explorer
1
From the configuration tree, click the Service Groups tab.
2
Click the service group to which the resources belong.
3
In the view panel, click the Resources tab.
4
In the Resources View, right-click the link between the resources.
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5
Click Unlink... from the menu.
6
In the Question dialog box, click Yes to delete the link.
To unlink resources from Command Center
1
In the Command Center configuration tree, expand Commands >
Configuration > Dependencies > Unlink Resources.
2
Click the service group that contains the linked resources.
3
Click the parent resource in the Service Group Resources box. After selecting
the parent resource, the corresponding child resources are displayed in the
Child Resources box.
4
Click the child resource.
5
Click Apply.
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Invoking a resource action
Cluster Explorer enables you to initiate a predefined action script. Some examples
of predefined resource actions are splitting and joining disk groups.
To invoke a resource action
1
In the Service Groups tab of the configuration tree, right-click the resource.
2
Click Actions...
3
Specify the details of the action as follows:
■
Click the predefined action to execute.
■
Click the system on which to execute the action.
■
To add an argument, click the Add icon (+) and enter the argument. Click
the Delete icon (-) to remove an argument.
■
Click OK.
Refreshing the ResourceInfo attribute
Refresh the ResourceInfo attribute to view the latest values for that attribute.
To refresh the ResourceInfo attribute
1
In the Service Groups tab of the configuration tree, right-click the resource.
2
Click Refresh ResourceInfo, and click the system on which to refresh the
attribute value.
Clearing the ResourceInfo attribute
Clear the ResourceInfo attribute to reset all the parameters in this attribute.
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To clear the parameters of the ResourceInfo attribute
1
In the Service Groups tab of the configuration tree, right-click the resource.
2
Click Clear ResourceInfo, and click the system on which to reset the attribute
value.
Importing resource types
The Java Console enables you to import resource types into your configuration
(main.cf). For example, use this procedure to import the types.cf for enterprise
agents to your configuration. You cannot import resource types that already exist
in your configuration.
To import a resource type from Cluster Explorer
1
On the File menu, click Import Types.
2
In the Import Types dialog box:
■
Click the file from which to import the resource type. The dialog box displays
the files on the system that Cluster Manager is connected to.
■
Click Import.
Running HA fire drill from the Java Console
Use the Cluster Manager to run HA fire drills for specific resources in a local cluster.
You can run HA fire drill for agents that support the functionality.
To run HA fire drill
1
On the Cluster Explorer toolbar, click Virtual Fire Drill.
or
From Cluster Explorer, click Virtual Fire Drill... on the Tools menu.
2
Specify details to run a virtual fire drill as follows:
■
Select the type of check to run.
■
Select a service group for which to run the infrastructure checks. Make sure
you select a service group that is online.
■
Select a system to run the checks on.
■
Click Perform checks.
■
View the result of the check. If the virtual fire drill reports any errors,
right-click the resource and select Fix it...
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3
Click Close.
Administering systems
Use the Java Console to administer systems in the cluster. Use the console to add,
delete, freeze, and unfreeze systems.
Adding a system
Cluster Explorer and Command Center enable you to add a system to the cluster.
A system must have an entry in the LLTTab configuration file before it can be added
to the cluster.
To add a system from Cluster Explorer
1
On the Edit menu, click Add, and click System.
or
Click Add System on the Cluster Explorer toolbar.
2
Enter the name of the system.
3
Click Show Command in the bottom left corner to view the command
associated with the system. Click Hide Command to close the view of the
command.
4
Click OK.
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To add a system from Command Center
1
Click Add System in the Command Center toolbar.
or
In the Command Center configuration tree, expand Commands >
Configuration > Cluster Objects > Add System.
2
Enter the name of the system.
3
Click Apply.
Deleting a system
This topic describes how to delete a system.
To delete a system from Command Center
1
In the Command Center configuration tree, expand Commands >
Configuration > Cluster Objects > Delete System.
2
Click the system.
3
Click Apply.
Freezing a system
Freeze a system to prevent service groups from coming online on the system.
To freeze a system from Cluster Explorer
1
Click the Systems tab of the configuration tree.
2
In the configuration tree, right-click the system, click Freeze, and click
Temporary or Persistent from the menu. The persistent option maintains the
frozen state after a reboot if the user saves this change to the configuration.
To freeze a system from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Availability > Freeze System.
2
Click the system.
3
If necessary, select the persistent and evacuate check boxes. The evacuate
option moves all service groups to a different system before the freeze operation
takes place. The persistent option maintains the frozen state after a reboot if
the user saves this change to the configuration.
4
Click Apply.
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Unfreezing a system
Unfreeze a frozen system to enable service groups to come online on the system.
To unfreeze a system from Cluster Explorer
1
Click the Systems tab of the configuration tree.
2
In the configuration tree, right-click the system and click Unfreeze.
To unfreeze a system from Command Center
1
In the Command Center configuration tree, expand Commands > Operations
> Availability > Unfreeze System.
2
Click the system.
3
Click Apply.
Administering clusters
Use the Java Console to specify the clusters you want to view from the console,
and to modify the VCS configuration. The configuration describes the parameters
of the entire cluster. Use Cluster Explorer or Command Center to open, save, and
"save and close" a configuration.
VCS Simulator enables you to administer the configuration on the local system
while VCS is offline.
Opening a cluster configuration
Use Cluster Explorer or Command Center to open or make changes to the VCS
configuration.
To open a configuration from Cluster Explorer
◆
On the File menu, click Open Configuration.
or
Click Open Configuration on the Cluster Explorer toolbar.
To open a configuration from Command Center
1
In the Command Center configuration tree, expand Commands >
Configuration > Configuration File > Open Configuration.
2
Click Apply.
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Running commands
Saving a cluster configuration
After updating the VCS configuration, use Cluster Explorer or Command Center to
save the latest configuration to disk while maintaining the configuration state in
read-write mode.
To save a configuration from Cluster Explorer
◆
On the File menu, click Save Configuration.
or
Click Save Configuration on the Cluster Explorer toolbar.
To save a configuration from Command Center
1
In the Command Center configuration tree, expand Commands >
Configuration > Configuration File > Save Configuration.
2
Click Apply.
Saving and closing a cluster configuration
After you update the VCS configuration, use Cluster Explorer or Command Center
to save the latest configuration to disk, and close or change the configuration state
to read-only mode.
To save and close a configuration from Cluster Explorer
◆
On the File menu, click Close Configuration.
or
Click Save and Close Configuration on the Cluster Explorer toolbar.
To save and close a configuration from Command Center
1
In the Command Center configuration tree, expand Commands >
Configuration > Configuration File > Close Configuration.
2
Click Apply.
Running commands
Use Command Center to run commands on a cluster.
Commands are organized within the Command Center as "Configuration" commands
and "Operation" commands.
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Editing attributes
To run a command from Command Center
1
From Command Center, click the command from the command tree. If
necessary, expand the tree to view the command.
2
In the corresponding command interface, click the VCS objects and appropriate
options (if necessary).
3
Click Apply.
Editing attributes
Use the Java Console to edit attributes of VCS objects. By default, the Java Console
displays key attributes and type specific attributes. To view all attributes associated
with an object, click Show all attributes.
To edit an attribute from Cluster Explorer
1
From the Cluster Explorer configuration tree, click the object whose attributes
you want to edit.
2
In the view panel, click the Properties tab. If the attribute does not appear in
the Properties View, click Show all attributes.
3
In the Properties or Attributes View, click the icon in the Edit column of the
Key Attributes or Type Specific Attributes table. In the Attributes View, click
the icon in the Edit column of the attribute.
4
In the Edit Attribute dialog box, enter the changes to the attribute values as
follows:
5
■
To edit a scalar value:
Enter or click the value.
■
To edit a non-scalar value:
Use the + button to add an element. Use the - button to delete an element.
■
To change the attribute’s scope:
Click the Global or Per System option.
■
To change the system for a local attribute:
Click the system from the menu.
Click OK.
To edit an attribute from Command Center
1
In the Command Center configuration tree, expand Commands >
Configuration > Attributes > Modify vcs_object Attributes.
2
Click the VCS object from the menu.
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Querying the cluster configuration
3
In the attribute table, click the icon in the Edit column of the attribute.
4
In the Edit Attribute dialog box, enter the changes to the attribute values as
follows:
5
■
To edit a scalar value:
Enter or click the value.
■
To edit a non-scalar value:
Use the + button to add an element. Use the - button to delete an element.
■
To change the attribute’s scope:
Click the Global or Per System option.
■
To change the system for a local attribute:
Click the system from the menu.
Click OK.
Querying the cluster configuration
This topic describes how to perform a query on a cluster configuration, follow these
steps:
1
From Cluster Explorer, click Query on the Tools menu.
or
On the Cluster Explorer toolbar, click Query.
2
In the Cluster Query dialog box, enter the details of the query:
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Setting up VCS event notification by using the Notifier wizard
■
Click the VCS object to search.
■
Depending on the selected object, click the specific entity to search.
■
Click the appropriate phrase or symbol between the search item and value.
■
Click the appropriate value for the specified query.
■
Certain queries allow the user to enter specific filter information:
Click System, click Online Group Count, click <, and type the required
value in the blank field.
or
Click Resource, click [provide attribute name] and type in the name of
an attribute, click = or contains, and type the appropriate value of the
attribute in the blank field.
For example, click Resource, click [provide attribute name] and type in
pathname, click contains, and type c:\temp in the blank field.
■
To use additional queries, click + as many times as necessary to select the
appropriate options. Click - to reduce the number of queries.
■
Click AND or OR for each filter selection.
■
Click Search.
■
To search a new item, click Reset to reset the dialog box to its original
blank state.
Setting up VCS event notification by using the Notifier
wizard
The information presented in this topic assumes that you need to create both the
ClusterService group and the Notifier resource. If the ClusterService group exists
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Setting up VCS event notification by using the Notifier wizard
but the Notifier resource is configured under another group, you can modify the
attributes of the existing Notifier resource and system list for that group. If the
ClusterService group is configured but the Notifier resource is not configured, the
Notifier resource will be created and added to the ClusterService group.
To set up event notification by using the Notifier wizard
1
From Cluster Explorer, click Notifier Wizard... on the Tools menu.
or
On the Cluster Explorer toolbar, click Launch Notifier Resource Configuration
Wizard.
2
Click Next.
3
In the Service Group Configuration for Notifier dialog box, do the following:
■
Enter the name of the notifier resource to be created. For example, "ntfr".
■
Click the target systems in the Available Systems box.
■
Click the right arrow to move the systems to the Systems for Service
Group table. To remove a system from the table, click the system and click
the left arrow.
■
Select the Startup check box to add the systems to the service groups
AutoStartList attribute. This enables the service group to automatically come
online on a system every time HAD is started.
■
The priority number (starting with 0) is assigned to indicate the order of
systems on which the service group will start in case of a failover. If
necessary, double-click the entry in the Priority column to enter a new
value.
4
Click Next.
5
Choose the mode of notification that needs to be configured. Select the check
boxes to configure SNMP and/or SMTP (if applicable).
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Setting up VCS event notification by using the Notifier wizard
6
In the SNMP Configuration dialog box (if applicable), do the following:
■
Click + to create the appropriate number of fields for the SNMP consoles
and severity levels. Click - to remove a field.
■
Enter the console and click the severity level from the menu. For example,
"snmpserv" and "Information".
■
Enter the SNMP trap port. For example, "162" is the default value.
7
Click Next.
8
In the SMTP Configuration dialog box (if applicable), do the following:
9
■
Enter the name of the SMTP server.
■
Click + to create the appropriate number of fields for recipients of the
notification and severity levels. Click - to remove a field.
■
Enter the recipient and click the severity level in the drop-down list box. For
example, "admin@example.com" and "Information".
Click Next.
10 In the NIC Resource Configuration dialog box and do the following:
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Administering logs
■
Click Configure NIC Resource (recommended by Symantec) and proceed
to the next step. Otherwise, click Next.
■
If necessary, enter the name of the resource.
■
Click the icon (...) in the Discover column of the table to find the
MACAddress for each system.
■
Click OK on the Discover dialog box.
11 Click Next.
12 Click the Bring the Notifier Resource Online check box, if desired.
13 Click Next.
14 Click Finish.
Administering logs
The Java Console enables you to customize the log display of messages that the
engine generates. In the Logs dialog box, you can set filter criteria to search and
view messages, and monitor and resolve alert messages.
To view the VCS Log pop-up, select View and Logs from the drop-down menu or
click Show the Logs from the toolbar.
To browse the logs for detailed views of each log message, double-click the event’s
description. Use the arrows in the VCS Log details pop-up window to navigate
backward and forward through the message list.
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Administering logs
Customizing the log display
From the Logs dialog box, use the Edit Filters feature to customize the display of
log messages.
To customize the display for VCS logs
1
In the VCS Logs tab, click Edit Filters.
2
Enter the filter criteria and do the following:
3
■
Click the types of logs to appear on the message display.
■
From the Logs of list, select the category of log messages to display.
■
From the Named menu, select the name of the selected object or
component. To view all the messages for the selected category, click All.
■
In the Logs from last field, enter the numerical value and select the time
unit.
■
To search log messages, enter the search string. Select the Whole String
check box, if required.
Click OK.
To customize the display for agent logs
◆
In the Agent Logs tab, enter the filter criteria and do the following:
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Administering logs
■
Click the name of the system.
■
Enter the number of logs to view.
■
Click the resource type.
■
Click the name of the resource. To view messages for all resources, click
All.
■
Click Get Logs.
Resetting the log display
Use the Reset Filters feature to set the default settings for the log view. For
example, if you customized the log view to only show critical and error messages
by using the Edit Filters feature, the Reset Filters feature sets the view to show
all log messages.
To reset the default settings for the log display
◆
In the VCS Logs tab, click Reset Filters.
Monitoring alerts
The Java Console sends automatic alerts that require administrative action and
appear on the Alerts tab of the Logs dialog box. Use this tab to take action on the
alert or delete the alert.
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Administering logs
To take action on an alert
1
In the Alert tab or dialog box, click the alert to take action on.
2
Click Take Action.
3
Enter the required information to resolve the alert.
If the alert warns that a local group cannot fail over to any system in the local
cluster, you cannot take any action.
If the alert warns that a global group cannot fail over, the action involves bringing
the group online on another system in the global cluster environment.
If the alert warns that a global cluster is faulted, the action involves declaring
the cluster as a disaster, disconnect, or outage, and determining the service
groups to fail over to another cluster.
4
Click OK.
To delete an alert
1
In the Alert tab or dialog box, click the alert to delete.
2
Click Delete Alert.
3
Provide the details for this operation:
■
Enter the reason for deleting the alert.
■
Click OK.
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Administering VCS Simulator
Administering VCS Simulator
VCS Simulator, which can be installed on Windows systems, enables you to view
state transitions, experiment with configuration parameters, and predict how service
groups might behave during cluster or system faults. Use this tool to create and
save configurations in an OFFLINE state.
Through the Java Console, VCS Simulator enables you to configure a simulated
cluster panel, bring a system in an unknown state into an online state, simulate
power loss for running systems, simulate resource faults, and save the configuration
while VCS is offline.
For global clusters, you can simulate the process of generating and clearing cluster
faults.
You can run multiple simulated clusters on a system by using different port numbers
for each cluster. The Java Console provides the same views and features that are
available for online configurations
See “About VCS Simulator” on page 359.
180
Chapter
Administering the cluster
from the command line
This chapter includes the following topics:
■
About administering VCS from the command line
■
Starting VCS
■
Stopping the VCS engine and related processes
■
About managing VCS configuration files
■
About managing VCS users from the command line
■
About querying VCS
■
About administering service groups
■
Administering agents
■
About administering resources
■
About administering resource types
■
Administering systems
■
About administering clusters
■
Using the -wait option in scripts that use VCS commands
■
About administering simulated clusters from the command line
7
Administering the cluster from the command line
About administering VCS from the command line
About administering VCS from the command line
Review the details on commonly used commands to administer VCS. For more
information about specific commands or their options, see their usage information
or the man pages associated with the commands.
You can enter most commands from any system in the cluster when VCS is running.
The command to start VCS is typically initiated at system startup.
Note: On Windows Server, if User Access Control (UAC) is enabled and configured,
all VCS commands must be run in the Run as administrator mode. To launch the
command prompt in the administrator mode, right-click the command prompt shortcut
from the Windows Start menu and click Run as administrator from the context
menu. See the Microsoft documentation for more information on UAC.
Symbols used in the VCS command syntax
Table 7-1 specifies the symbols used in the VCS commands. Do not use these
symbols when you run the commands.
Table 7-1
Symbols used in the VCS commands
Symbols
Usage
Example
[]
Used for command options or hasys -freeze [-persistent] [-evacuate]
arguments that are optional.
system
|
Used to specify that only one
of the command options or
arguments separated with |
can be used at a time.
hagetcf [-s | -silent]
...
Used to specify that the
argument can have several
values.
hagrp -modify group attribute value … [-sys
system]
{}
Used to specify that the
command options or
arguments enclosed within
these braces must be kept
together.
haatr -display {cluster | group | system |
heartbeat | <restype>}
haclus -modify attribute {key value}
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Administering the cluster from the command line
About administering VCS from the command line
Symbols used in the VCS commands (continued)
Table 7-1
Symbols
Usage
Example
<>
Used in the command help or
usage output to specify that
these variables must be
replaced with the actual
values.
haclus -help
VCS INFO V-16-1-10601 Usage:
haclus -add <cluster> <ip>
haclus -delete <cluster>
See “About administering VCS from the command line” on page 182.
How VCS identifies the local system
VCS uses the system’s node name. To view the system’s node name from the
command line, type:
C:\> hostname
To view the system’s node name from the desktop
1
Right-click My Computer to display the pop-up menu.
2
Click Properties. The name of the system is listed in the Computer Name tab.
About specifying values preceded by a dash (-)
When you specify values in a command-line syntax, you must prefix values that
begin with a dash (-) with a percentage sign (%). If a value begins with a percentage
sign, you must prefix it with another percentage sign. (The initial percentage sign
is stripped by the High Availability Daemon (HAD) and does not appear in the
configuration file.)
About the -modify option
Most configuration changes are made by using the -modify options of the
commands haclus, hagrp, hares, hasys, and hatype. Specifically, the -modify
option of these commands changes the attribute values that are stored in the VCS
configuration file. By default, all attributes are global, meaning that the value of the
attribute is the same for all systems.
Note: VCS must be in read or write mode before you can change the configuration.
See “Setting the configuration to read or write” on page 190.
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Administering the cluster from the command line
About administering VCS from the command line
Encrypting VCS passwords
Use the vcsencrypt utility to encrypt passwords when you edit the VCS configuration
file main.cf to add VCS users.
Note: Do not use the vcsencrypt utility when you enter passwords from a
configuration wizard or from the Java console.
To encrypt a password
1
Run the utility from the command line.
# vcsencrypt -vcs
2
The utility prompts you to enter the password twice. Enter the password and
press Return.
Enter Password:
Enter Again:
3
The utility encrypts the password and displays the encrypted password. Use
this password to edit the VCS configuration file main.cf.
Encrypting agent passwords
Use the vcsencrypt utility to encrypt passwords when you edit the VCS configuration
file main.cf when you configure agents that require user passwords.
Note: Do not use the vcsencrypt utility when you enter passwords from a
configuration wizard or from the Java console.
To encrypt an agent password
1
Run the utility from the command line.
vcsencrypt -agent
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Starting VCS
2
The utility prompts you to enter the password twice. Enter the password and
press Return.
Enter New Password:
Enter Again:
3
The utility encrypts the password and displays the encrypted password. Use
this password to edit the VCS configuration file main.cf.
Starting VCS
When VCS starts, it checks the state of its local configuration file and registers with
GAB for cluster membership. If the local configuration is valid, and if no other system
is running VCS, it builds its state from the local configuration file and enters the
running state.
If the configuration on all nodes is invalid, the VCS engine waits for manual
intervention, or for VCS to be started on a system that has a valid configuration.
See “Remote cluster states” on page 601.
See “System states” on page 603.
To start VCS
◆
Run the following command:
hastart
To start VCS when all systems are in the ADMIN_WAIT state
◆
Run the following command from any system in the cluster to force VCS to
use the configuration file from the system specified by the variable system:
hasys -force system
To start VCS on a single node
◆
Type the following command to start an instance of VCS that does not require
the GAB and LLT packages. Do not use this command on a multisystem cluster.
hastart -onenode
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Administering the cluster from the command line
Stopping the VCS engine and related processes
To start VCS as a time-sharing process
◆
Run the following command:
hastart -ts
To start CommandServer
◆
Run the following command:
net start cmdserver
Stopping the VCS engine and related processes
The hastop command stops the High Availability Daemon (HAD) and related
processes. You can customize the behavior of the hastop command by configuring
the EngineShutdown attribute for the cluster.
See “About controlling the hastop behavior by using the EngineShutdown attribute”
on page 187.
The hastop command includes the following options:
hastop
hastop
hastop
hastop
-all [-force]
[-help]
-local [-force | -evacuate | -noautodisable]
-sys system ... [-force | -evacuate | -noautodisable]
Table 7-2 shows the options for the hastop command.
Table 7-2
Options for the hastop command
Option
Description
-all
Stops HAD on all systems in the cluster and takes all service groups
offline.
-help
Displays command usage.
-local
Stops HAD on the system on which you typed the command
-force
Allows HAD to be stopped without taking service groups offline on the
system. The value of the EngineShutdown attribute does not influence
the behavior of the -force option.
-evacuate
When combined with -local or -sys, migrates the system’s active
service groups to another system in the cluster, before the system is
stopped.
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Administering the cluster from the command line
Stopping the VCS engine and related processes
Table 7-2
Option
Options for the hastop command (continued)
Description
-noautodisable Ensures that service groups that can run on the node where the hastop
command was issued are not autodisabled. This option can be used
with -evacuate but not with -force.
-sys
Stops HAD on the specified system.
About stopping VCS without the -force option
When VCS is stopped on a system without using the -force option, it enters the
LEAVING state, and waits for all groups to go offline on the system. Use the output
of the command hasys -display system to verify that the values of the SysState
and the OnGrpCnt attributes are non-zero. VCS continues to wait for the service
groups to go offline before it shuts down.
See “Troubleshooting resources ” on page 575.
About stopping VCS with options other than the -force option
When VCS is stopped by options other than -force on a system with online service
groups, the groups that run on the system are taken offline and remain offline. VCS
indicates this by setting the attribute IntentOnline to 0. Use the option -force to
enable service groups to continue being online while the VCS engine (HAD) is
brought down and restarted. The value of the IntentOnline attribute remains
unchanged after the VCS engine restarts.
About controlling the hastop behavior by using the EngineShutdown
attribute
Use the EngineShutdown attribute to define VCS behavior when a user runs the
hastop command.
Note: VCS does not consider this attribute when the hastop is issued with the
following options: -force or -local -evacuate -noautodisable.
Configure one of the following values for the attribute depending on the desired
functionality for the hastop command:
Table 7-3 shows the engine shutdown values for the attribute.
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Administering the cluster from the command line
About managing VCS configuration files
Table 7-3
Engine shutdown values
EngineShutdown Description
Value
Enable
Process all hastop commands. This is the default behavior.
Disable
Reject all hastop commands.
DisableClusStop
Do not process the hastop -all command; process all other hastop
commands.
PromptClusStop
Prompt for user confirmation before you run the hastop -all
command; process all other hastop commands.
PromptLocal
Prompt for user confirmation before you run the hastop -local
command; process all other hastop commands.
PromptAlways
Prompt for user confirmation before you run any hastop command.
Additional considerations for stopping VCS
Following are some additional considerations for stopping VCS:
■
If you use the command reboot, behavior is controlled by the ShutdownTimeOut
parameter. After HAD exits, if GAB exits within the time designated in the
ShutdownTimeout attribute, the remaining systems recognize this as a reboot
and fail over service groups from the departed system. For systems that run
several applications, consider increasing the value of the ShutdownTimeout
attribute.
■
If you stop VCS on a system by using the hastop command, it autodisables
each service group that includes the system in their SystemList attribute. (This
does not apply to systems that are powered off.)
■
If you use the -evacuate option, evacuation occurs before VCS is brought down.
About managing VCS configuration files
This section describes how to verify, back up, and restore VCS configuration files.
See “About the main.cf file” on page 55.
See “About the types.cf file” on page 59.
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Administering the cluster from the command line
About managing VCS configuration files
About the hacf utility
The hacf utility translates the VCS configuration language into a syntax that can be
read by the VCS engine. Specifically, hacf translates the contents of the main
configuration file, main.cf, into commands for the VCS server.
Note: If User Access Control (UAC) is enabled on Windows Server systems, you
must launch the command prompt in the Run as administrator mode and then run
the hacf commands. To launch the command prompt in the administrator mode,
right-click the command prompt shortcut from the Windows Start menu and click
Run as administrator from the context menu.
See “Setting the configuration to read or write” on page 190.
About multiple versions of .cf files
When hacf creates a .cf file, it does not overwrite existing .cf files. A copy of the file
remains in the directory, and its name includes a suffix of the date and time it was
created, such as main.cf.03Dec2001.17.59.04. In addition, the previous version of
any .cf file is saved with the suffix .previous; for example, main.cf.previous.
Verifying a configuration
Use hacf to verify (check syntax of) the main.cf and the type definition file, types.cf.
VCS does not run if hacf detects errors in the configuration.
To verify a configuration
◆
Run the following command:
# hacf -verify config_directory
The variable config_directory refers to directories containing a main.cf file and
any .cf files included in main.cf.
No error message and a return value of zero indicates that the syntax is legal.
Scheduling automatic backups for VCS configuration files
Configure the BackupInterval attribute to instruct VCS to create a back up of the
configuration periodically. VCS backs up the main.cf and types.cf files as
main.cf.autobackup and types.cf.autobackup, respectively.
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Administering the cluster from the command line
About managing VCS configuration files
To start periodic backups of VCS configuration files
◆
Set the cluster-level attribute BackupInterval to a non-zero value.
For example, to back up the configuration every 5 minutes, set BackupInterval
to 5.
Example:
# haclus -display | grep BackupInterval
BackupInterval
0
# haconf -makerw
# haclus -modify BackupInterval 5
# haconf -dump -makero
Saving a configuration
When you save a configuration, VCS renames the file main.cf.autobackup to main.cf.
VCS also save your running configuration to the file main.cf.autobackup.
If have not configured the BackupInterval attribute, VCS saves the running
configuration.
See “Scheduling automatic backups for VCS configuration files” on page 189.
To save a configuration
◆
Run the following command
# haconf -dump -makero
The option -makero sets the configuration to read-only.
Setting the configuration to read or write
This topic describes how to set the configuration to read/write.
To set the mode to read or write
◆
Type the following command:
# haconf -makerw
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Administering the cluster from the command line
About managing VCS users from the command line
Displaying configuration files in the correct format
When you manually edit VCS configuration files (for example, the main.cf or types.cf
file), you create formatting issues that prevent the files from being parsed correctly.
To display the configuration files in the correct format
◆
Run the following commands to display the configuration files in the correct
format:
# hacf -cftocmd config
# hacf -cmdtocf config
About managing VCS users from the command line
You can add, modify, and delete users on any system in the cluster, provided you
have the privileges to do so.
If VCS is running in secure mode, specify fully-qualified user names, in the format
username@domain. You cannot assign or change passwords for users when VCS
is running in secure mode.
Note: User names provided in the domain\username orusername@domain.com
formats do not work.
The commands to add, modify, and delete a user must be executed only as root
or administrator and only if the VCS configuration is in read/write mode.
See “Setting the configuration to read or write” on page 190.
Note: You must add users to the VCS configuration to monitor and administer VCS
from the graphical user interface Cluster Manager.
Adding a user
Users in the category Cluster Guest cannot add users.
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Administering the cluster from the command line
About managing VCS users from the command line
To add a user
1
Set the configuration to read/write mode:
# haconf -makerw
2
Add the user:
# hauser -add user [-priv <Administrator|Operator> [-group
service_groups]]
3
Enter a password when prompted.
4
Reset the configuration to read-only:
# haconf -dump -makero
To add a user with cluster administrator access
◆
Type the following command:
# hauser -add user -priv Administrator
To add a user with cluster operator access
◆
Type the following command:
# hauser -add user -priv Operator
To add a user with group administrator access
◆
Type the following command:
# hauser -add user -priv Administrator -group service_groups
To add a user with group operator access
◆
Type the following command:
# hauser -add user -priv Operator -group service_groups
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Administering the cluster from the command line
About managing VCS users from the command line
193
To add a user on only one node with cluster administrator access
1
Set the configuration to read/write mode:
# haconf -makerw
2
Add the user:
# hauser -add user@node.domain -priv Administrator
For example,
# hauser -add user1@sys1.domain1.com -priv
3
Administrator
Reset the configuration to read-only:
# haconf -dump -makero
To add a user on only one node with group administrator access
◆
Type the following command:
# hauser -add user@node.domain -priv Administrator -group service_groups
Assigning and removing user privileges
The following procedure desribes how to assign and remove user privileges:
To assign privileges to an administrator or operator
◆
Type the following command:
hauser -addpriv user Adminstrator|Operator
[-group service_groups]
To remove privileges from an administrator or operator
◆
Type the following command:
hauser -delpriv user Adminstrator|Operator
[-group service_groups]
To assign privileges to an OS user group
◆
Type the following command:
hauser -addpriv usergroup AdminstratorGroup|OperatorGroup
[-group service_groups]
Administering the cluster from the command line
About managing VCS users from the command line
To remove privileges from an OS user group
◆
Type the following command:
hauser -delpriv usergroup AdminstratorGroup|OperatorGroup
[-group service_groups]
Modifying a user
Users in the category Cluster Guest cannot modify users.
To modify a user
1
Set the configuration to read or write mode:
# haconf -makerw
2
Enter the following command to modify the user:
# hauser -update user
3
Enter a new password when prompted.
4
Reset the configuration to read-only:
# haconf -dump -makero
Deleting a user
You can delete a user from the VCS configuration.
To delete a user
1
Set the configuration to read or write mode:
# haconf -makerw
2
For users with Administrator and Operator access, remove their privileges:
# hauser -delpriv user Adminstrator|Operator [-group
service_groups]
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Administering the cluster from the command line
About querying VCS
3
Delete the user from the list of registered users:
# hauser -delete user
4
Reset the configuration to read-only:
# haconf -dump -makero
Displaying a user
This topic describes how to display a list of users and their privileges.
To display a list of users
◆
Type the following command:
# hauser -list
To display the privileges of all users
◆
Type the following command:
# hauser -display
To display the privileges of a specific user
◆
Type the following command:
# hauser -display user
About querying VCS
VCS enables you to query various cluster objects, including resources, service
groups, systems, resource types, agents, and clusters. You may enter query
commands from any system in the cluster. Commands to display information on
the VCS configuration or system states can be executed by all users: you do not
need root privileges.
Querying service groups
This topic describes how to perform a query on service groups.
195
Administering the cluster from the command line
About querying VCS
To display the state of a service group on a system
◆
Type the following command:
# hagrp -state [service_group] [-sys system]
To display the resources for a service group
◆
Type the following command:
# hagrp -resources service_group
To display a list of a service group’s dependencies
◆
Type the following command:
# hagrp -dep [service_group]
To display a service group on a system
◆
Type the following command:
# hagrp -display [service_group] [-sys system]
If service_group is not specified, information regarding all service groups is
displayed.
To display attributes of a system
◆
Type the following command:
# hagrp -display [service_group]
[-attribute attribute] [-sys system]
Note that system names are case-sensitive.
To display the value of a specific service group attribute
◆
Type the following command:
# hagrp -value service_group attribute
Querying resources
This topic describes how to perform a query on resources.
To display a resource’s dependencies
◆
Type the following command:
# hares -dep [resource]
196
Administering the cluster from the command line
About querying VCS
To display information about a resource
◆
Type the following command:
# hares -display [resource]
If resource is not specified, information regarding all resources is displayed.
To display resources of a service group
◆
Type the following command:
# hares -display -group service_group
To display resources of a resource type
◆
Type the following command:
# hares -display -type resource_type
To display resources on a system
◆
Type the following command:
# hares -display -sys system
To display the value of a specific resource attribute
◆
Type the following command:
# hares -value resource attribute
Querying resource types
This topic describes how to perform a query on resource types.
To display all resource types
◆
Type the following command:
# hatype -list
To display resources of a particular resource type
◆
Type the following command:
# hatype -resources resource_type
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Administering the cluster from the command line
About querying VCS
To display information about a resource type
◆
Type the following command:
# hatype -display resource_type
If resource_type is not specified, information regarding all types is displayed.
To display the value of a specific resource type attribute
◆
Type the following command:
# hatype -value resource_type attribute
Querying agents
Table 7-4 lists the run-time status for the agents that the haagent -display
command displays.
Table 7-4
Run-time status for the agents
Run-time status Definition
Faults
Indicates the number of agent faults within one hour of the time the
fault began and the time the faults began.
Messages
Displays various messages regarding agent status.
Running
Indicates the agent is operating.
Started
Indicates the file is executed by the VCS engine (HAD).
To display the run-time status of an agent
◆
Type the following command:
# haagent -display [agent]
If agent is not specified, information regarding all agents appears.
To display the value of a specific agent attribute
◆
Type the following command:
# haagent -value agent attribute
Querying systems
This topic describes how to perform a query on systems.
198
Administering the cluster from the command line
About querying VCS
To display a list of systems in the cluster
◆
Type the following command:
# hasys -list
To display information about each system
◆
Type the following command:
# hasys -display [system]
If you do not specify a system, the command displays attribute names and
values for all systems.
To display the value of a specific system attribute
◆
Type the following command:
# hasys -value system attribute
Querying clusters
This topic describes how to perform a query on clusters.
To display the value of a specific cluster attribute
◆
Type the following command:
# haclus -value attribute
To display information about the cluster
◆
Type the following command:
# haclus -display
Querying status
This topic describes how to perform a query on status.
Note: Unless executed with the -summary options, the hastatus command continues
to produce output of online state transitions until you interrupt it with the command
CTRL+C.
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Administering the cluster from the command line
About querying VCS
To display the status of all service groups in the cluster, including resources
◆
Type the following command:
# hastatus
To display the status of a particular service group, including its resources
◆
Type the following command:
hastatus [-sound] -group service_group
[-group service_group]...
If you do not specify a service group, the status of all service groups appears.
The -sound option enables a bell to ring each time a resource faults.
To display the status of service groups and resources on specific systems
◆
Type the following command:
hastatus [-sound] -sys system_name
[-sys system_name]...
To display the status of specific resources
◆
Type the following command:
hastatus [-sound] -resource resource_name
[-resource resource_name]...
To display the status of cluster faults, including faulted service groups, resources,
systems, links, and agents
◆
Type the following command:
# hastatus -summary
Querying log data files (LDFs)
Log data files (LDFs) contain data regarding messages written to a corresponding
English language file. Typically, for each English file there is a corresponding LDF.
To display the hamsg usage list
◆
Type the following command:
# hamsg -help
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Administering the cluster from the command line
About querying VCS
To display the list of LDFs available on the current system
◆
Type the following command:
# hamsg -list
To display general LDF data
◆
Type the following command:
# hamsg -info [-path path_name] LDF
The option -path specifies where hamsg looks for the specified LDF. If not
specified, hamsg looks for files in the default directory:
Program Files\VERITAS\Cluster Server\ldf
To display specific LDF data
◆
Type the following command:
# hamsg [-any] [-sev C|E|W|N|I]
[-otype VCS|RES|GRP|SYS|AGT]
[-oname object_name] [-cat category] [-msgid message_ID]
[-path path_name] [-lang language] LDF_file
-any
Specifies hamsg return messages that match any of the specified
query options.
-sev
Specifies hamsg return messages that match the specified
message severity Critical, Error, Warning, Notice, or Information.
-otype
Specifies hamsg return messages that match the specified object
type
■
VCS = general VCS messages
■
RES = resource
■
GRP = service group
■
SYS = system
■
AGT = agent
-oname
Specifies hamsg return messages that match the specified object
name.
-cat
Specifies hamsg return messages that match the specified
category. For example, the value 2 in the message id
“V-16-2-13067”
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Administering the cluster from the command line
About querying VCS
-msgid
Specifies hamsg return messages that match the specified
message ID. For example, the value 13067 the message id
“V-16-2-13067”'
-path
Specifies where hamsg looks for the specified LDF. If not specified,
hamsg looks for files in the default directory /var/VRTSvcs/ldf.
-lang
Specifies the language in which to display messages. For example,
the value en specifies English and "ja" specifies Japanese.
Using conditional statements to query VCS objects
Some query commands include an option for conditional statements. Conditional
statements take three forms:
Attribute=Value (the attribute equals the value)
Attribute!=Value (the attribute does not equal the value)
Attribute=~Value (the value is the prefix of the attribute, for example a query for
the state of a resource = ~FAULTED returns all resources whose state begins with
FAULTED.)
Multiple conditional statements can be used and imply AND logic.
You can only query attribute-value pairs that appear in the output of the command
hagrp -display.
See “Querying service groups” on page 195.
To display the list of service groups whose values match a conditional statement
◆
Type the following command:
# hagrp -list [conditional_statement]
If no conditional statement is specified, all service groups in the cluster are
listed.
To display a list of resources whose values match a conditional statement
◆
Type the following command:
# hares -list [conditional_statement]
If no conditional statement is specified, all resources in the cluster are listed.
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Administering the cluster from the command line
About administering service groups
To display a list of agents whose values match a conditional statement
◆
Type the following command:
# haagent -list [conditional_statement]
If no conditional statement is specified, all agents in the cluster are listed.
About administering service groups
Administration of service groups includes tasks such as adding, deleting, or
modifying service groups.
Adding and deleting service groups
This topic describes how to add or delete a service group.
To add a service group to your cluster
◆
Type the following command:
hagrp -add service_group
The variable service_group must be unique among all service groups defined
in the cluster.
This command initializes a service group that is ready to contain various
resources. To employ the group properly, you must populate its SystemList
attribute to define the systems on which the group may be brought online and
taken offline. (A system list is an association of names and integers that
represent priority values.)
To delete a service group
◆
Type the following command:
hagrp -delete service_group
Note that you cannot delete a service group until all of its resources are deleted.
Modifying service group attributes
This topic describes how to modify service group attributes.
203
Administering the cluster from the command line
About administering service groups
To modify a service group attribute
◆
Type the following command:
hagrp -modify service_group attribute value [-sys system]
The variable value represents:
system_name1 priority1 system_name2 priority2
If the attribute that is being modified has local scope, you must specify the
system on which to modify the attribute, except when modifying the attribute
on the system from which you run the command.
For example, to populate the system list of service group groupx with Systems
A and B, type:
hagrp -modify groupx SystemList -add SystemA 1 SystemB 2
Similarly, to populate the AutoStartList attribute of a service group, type:
hagrp -modify groupx AutoStartList SystemA SystemB
You may also define a service group as parallel. To set the Parallel attribute
to 1, type the following command. (Note that the default for this attribute is 0,
which designates the service group as a failover group.):
hagrp -modify groupx Parallel 1
You cannot modify this attribute if resources have already been added to the
service group.
You can modify the attributes SystemList, AutoStartList, and Parallel only by
using the command hagrp -modify. You cannot modify attributes created by
the system, such as the state of the service group.
Modifying the SystemList attribute
You use the hagrp -modify command to change a service group’s existing system
list, you can use the options -modify, -add, -update, -delete, or -delete -keys.
For example, suppose you originally defined the SystemList of service group groupx
as SystemA and SystemB. Then after the cluster was brought up you added a new
system to the list:
hagrp -modify groupx SystemList -add SystemC 3
You must take the service group offline on the system that is being modified.
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Administering the cluster from the command line
About administering service groups
When you add a system to a service group’s system list, the system must have
been previously added to the cluster. When you use the command line, you can
use the hasys -add command.
When you delete a system from a service group’s system list, the service group
must not be online on the system to be deleted.
If you attempt to change a service group’s existing system list by using hagrp
-modify without other options (such as -add or -update) the command fails.
Bringing service groups online
This topic describes how to bring the service groups online.
To bring a service group online
◆
Type the following command:
hagrp -online service_group -sys system
To start a service group on a system and bring online only the resources already
online on another system
◆
Type the following command:
hagrp -online service_group -sys system
-checkpartial other_system
If the service group does not have resources online on the other system, the
service group is brought online on the original system and the checkpartial
option is ignored.
Note that the checkpartial option is used by the Preonline trigger during
failover. When a service group that is configured with Preonline =1 fails over
to another system (system 2), the only resources brought online on system 2
are those that were previously online on system 1 prior to failover.
To bring a service group and its associated child service groups online
◆
Type one of the following commands:
■
hagrp -online -propagate service_group -sys system
■
hagrp -online -propagate service_group -any
Note: See the man pages associated with the hagrp command for more information
about the -propagate option.
205
Administering the cluster from the command line
About administering service groups
Taking service groups offline
This topic describes how to take the service groups offline.
To take a service group offline
◆
Type the following command:
hagrp -offline service_group -sys system
To take a service group offline only if all resources are probed on the system
◆
Type the following command:
hagrp -offline [-ifprobed] service_group -sys system
To take a service group and its associated parent service groups offline
◆
Type one of the following commands:
■
hagrp -offline -propagate service_group -sys system
■
hagrp -offline -propagate service_group -any
Note: See the man pages associated with the hagrp command for more information
about the -propagate option.
Switching service groups
The process of switching a service group involves taking it offline on its current
system and bringing it online on another system
To switch a service group from one system to another
◆
Type the following command:
hagrp -switch service_group -to system
A service group can be switched only if it is fully or partially online. The -switch
option is not supported for switching hybrid service groups across system
zones.
Switch parallel global groups across cluster by using the following command:
hagrp -switch service_group -any -clus remote_cluster
VCS brings the parallel service group online on all possible nodes in the remote
cluster.
206
Administering the cluster from the command line
About administering service groups
Freezing and unfreezing service groups
Freeze a service group to prevent it from failing over to another system. This freezing
process stops all online and offline procedures on the service group.
Note that if the service group is in ONLINE state and if you freeze the service group,
then the group continues to remain in ONLINE state.
Unfreeze a frozen service group to perform online or offline operations on the service
group.
To freeze a service group (disable online, offline, and failover operations)
◆
Type the following command:
hagrp -freeze service_group [-persistent]
The option -persistent enables the freeze to be remembered when the cluster
is rebooted.
To unfreeze a service group (reenable online, offline, and failover operations)
◆
Type the following command:
hagrp -unfreeze service_group [-persistent]
Enabling and disabling service groups
Enable a service group before you bring it online. A service group that was manually
disabled during a maintenance procedure on a system may need to be brought
online after the procedure is completed.
Disable a service group to prevent it from coming online. This process temporarily
stops VCS from monitoring a service group on a system that is undergoing
maintenance operations
To enable a service group
◆
Type the following command:
hagrp -enable service_group [-sys system]
A group can be brought online only if it is enabled.
To disable a service group
◆
Type the following command:
hagrp -disable service_group [-sys system]
A group cannot be brought online or switched if it is disabled.
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Administering the cluster from the command line
About administering service groups
To enable all resources in a service group
◆
Type the following command:
hagrp -enableresources service_group
To disable all resources in a service group
◆
Type the following command:
hagrp -disableresources service_group
Agents do not monitor group resources if resources are disabled.
Clearing faulted resources in a service group
Clear a resource to remove a fault and make the resource available to go online.
To clear faulted, non-persistent resources in a service group
◆
Type the following command:
hagrp -clear service_group [-sys system]
Clearing a resource initiates the online process previously blocked while waiting
for the resource to become clear.
■
If system is specified, all faulted, non-persistent resources are cleared from
that system only.
■
If system is not specified, the service group is cleared on all systems in the
group’s SystemList in which at least one non-persistent resource has faulted.
To clear resources in ADMIN_WAIT state in a service group
◆
Type the following command:
hagrp -clearadminwait [-fault] service_group -sys system
See “ Changing agent file paths and binaries” on page 395.
Linking and unlinking service groups
This topic describes how to link service groups to create a dependency between
them.
See “About service group dependencies” on page 415.
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Administering the cluster from the command line
Administering agents
To link service groups
◆
Type the following command
hagrp -link parent_group child_group
gd_category gd_location [gd_type]
parent_group
Name of the parent group
child_group
Name of the child group
gd_category
Category of group dependency (online/offline).
gd_location
The scope of dependency (local/global/remote).
gd_type
Type of group dependency (soft/firm/hard). Default is firm.
To unlink service groups
◆
Type the following command:
hagrp -unlink parent_group child_group
Administering agents
Under normal conditions, VCS agents are started and stopped automatically.
To start an agent
◆
Run the following command:
haagent -start agent -sys system
To stop an agent
◆
Run the following command:
haagent -stop agent [-force] -sys system
The -force option stops the agent even if the resources for the agent are
online. Use the -force option when you want to upgrade an agent without taking
its resources offline.
209
Administering the cluster from the command line
About administering resources
About administering resources
Administration of resources includes tasks such as adding, deleting, modifying,
linking, unlinking , probing, and clearing resources, bringing resources online, and
taking them offline.
About adding resources
When you add a resource, all non-static attributes of the resource’s type, plus their
default values, are copied to the new resource.
Three attributes are also created by the system and added to the resource:
■
Critical (default = 1). If the resource or any of its children faults while online, the
entire service group is marked faulted and failover occurs.
■
AutoStart (default = 1). If the resource is set to AutoStart, it is brought online in
response to a service group command. All resources designated as AutoStart=1
must be online for the service group to be considered online. (This attribute is
unrelated to AutoStart attributes for service groups.)
■
Enabled. If the resource is set to Enabled, the agent for the resource’s type
manages the resource. The default is 1 for resources defined in the configuration
file main.cf, 0 for resources added on the command line.
Note: The addition of resources on the command line requires several steps, and
the agent must be prevented from managing the resource until the steps are
completed. For resources defined in the configuration file, the steps are completed
before the agent is started.
Adding resources
This topic describes how to add resources to a service group or remove resources
from a service group.
To add a resource
◆
Type the following command:
hares -add resource resource_type service_group
The resource name must be unique throughout the cluster. The resource type
must be defined in the configuration language. The resource belongs to the
group service_group.
210
Administering the cluster from the command line
About administering resources
Deleting resources
This topic describes how to delete resources from a service group.
To delete a resource
◆
Type the following command:
hares -delete resource
Adding, deleting, and modifying resource attributes
Resource names must be unique throughout the cluster and you cannot modify
resource attributes defined by the system, such as the resource state.
To modify a new resource
◆
Type the following command:
hares -modify resource attribute value
hares -modify resource attribute value
[-sys system] [-wait [-time waittime]]
The variable value depends on the type of attribute being created.
To set a new resource’s Enabled attribute to 1
◆
Type the following command:
hares -modify resourceA Enabled 1
The agent managing the resource is started on a system when its Enabled
attribute is set to 1 on that system. Specifically, the VCS engine begins to
monitor the resource for faults. Agent monitoring is disabled if the Enabled
attribute is reset to 0.
To add a resource attribute
◆
Type the following command:
haattr -add resource_type attribute
[value] [dimension] [default ...]
The variable value is a -string (default), -integer, or -boolean.
The variable dimension is -scalar (default), -keylist, -assoc, or -vector.
The variable default is the default value of the attribute and must be compatible
with the value and dimension. Note that this may include more than one item,
as indicated by ellipses (...).
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Administering the cluster from the command line
About administering resources
To delete a resource attribute
◆
Type the following command:
haattr -delete resource_type attribute
To add a static resource attribute
◆
Type the following command:
haattr -add -static resource_type static_attribute
[value] [dimension] [default ...]
To delete a static resource attribute
◆
Type the following command:
haattr -delete -static resource_type static_attribute
To add a temporary resource attribute
◆
Type the following command:
haattr -add -temp resource_type attribute
[value] [dimension] [default ...]
To delete a temporary resource attribute
◆
Type the following command:
haattr -delete -temp resource_type attribute
To modify the default value of a resource attribute
◆
Type the following command:
haattr -default resource_type attribute new_value ...
The variable new_value refers to the attribute’s new default value.
Defining attributes as local
Localizing an attribute means that the attribute has a per-system value for each
system listed in the group’s SystemList. These attributes are localized on a
per-resource basis. For example, to localize the attribute attribute_name for resource
only, type:
hares -local resource attribute_name
212
Administering the cluster from the command line
About administering resources
Note that global attributes cannot be modified with the hares -local command.
Table 7-5 lists the commands to be used to localize attributes depending on their
dimension.
Table 7-5
Making VCS attributes local
Dimension
Task and Command
scalar
Replace a value:
-modify [object] attribute_name value [-sys system]
vector
keylist
■
Replace list of values:
-modify [object] attribute_name value [-sys system]
■
Add list of values to existing list:
-modify [object] attribute_name -add value [-sys
system]
■
Update list with user-supplied values:
-modify [object] attribute_name -update entry_value
... [-sys system]
■
Delete all values in list (you cannot delete an individual element of
a vector):
-modify [object] attribute_name -delete -keys [-sys
system]
■
Replace list of keys (duplicate keys not allowed):
-modify [object] attribute_name value ... [-sys
system]
■
Add keys to list (duplicate keys not allowed):
-modify [object] attribute_name -add value ...
[-sys system]
■
Delete user-supplied keys from list:
-modify [object] attribute_name -delete key ...
[-sys system]
■
Delete all keys from list:
-modify [object] attribute_name -delete -keys [-sys
system]
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Administering the cluster from the command line
About administering resources
Table 7-5
Making VCS attributes local (continued)
Dimension
Task and Command
association
■
Replace list of key-value pairs (duplicate keys not allowed):
-modify [object] attribute_name value ... [-sys
system]
■
Add user-supplied list of key-value pairs to existing list (duplicate
keys not allowed):
-modify [object] attribute_name -add value ...[-sys
system]
■
Replace value of each key with user-supplied value:
-modify [object] attribute_name -update key value
... [-sys system]
■
Delete a key-value pair identified by user-supplied key:
-modify [object] attribute_name -delete key ...
[-sys system]
■
Delete all key-value pairs from association:
-modify [object] attribute_name -delete -keys [-sys
system]
Note: If multiple values are specified and if one is invalid, VCS returns
an error for the invalid value, but continues to process the others. In
the following example, if sysb is part of the attribute SystemList, but
sysa is not, sysb is deleted and an error message is sent to the log
regarding sysa.
hagrp -modify group1 SystemList -delete sysa sysb
[-sys system]
Linking and unlinking resources
Link resources to specify a dependency between them. A resource can have an
unlimited number of parents and children. When you link resources, the parent
cannot be a resource whose Operations attribute is equal to None or OnOnly.
Specifically, these are resources that cannot be brought online or taken offline by
an agent (None), or can only be brought online by an agent (OnOnly).
Loop cycles are automatically prohibited by the VCS engine. You cannot specify a
resource link between resources of different service groups.
214
Administering the cluster from the command line
About administering resources
To link resources
◆
Type the following command:
hares -link parent_resource child_resource
The variable parent_resource depends on child_resource being online before
going online itself. Conversely, parent_resource go offline before child_resource
goes offline.
For example, a NIC resource must be available before an IP resource can go
online, so for resources IP1 of type IP and NIC1 of type NIC, specify the
dependency as:
hares -link IP1 NIC1
To unlink resources
◆
Type the following command:
hares -unlink parent_resource child_resource
Bringing resources online
This topic describes how to bring a resource online.
To bring a resource online
◆
Type the following command:
hares -online resource -sys system
Taking resources offline
This topic describes how to take a resource offline.
To take a resource offline
◆
Type the following command:
hares -offline [-ignoreparent|parentprop] resource -sys system
The option -ignoreparent enables a resource to be taken offline even if its
parent resources in the service group are online. This option does not work if
taking the resources offline violates the group dependency.
215
Administering the cluster from the command line
About administering resources
To take a resource and its parent resources offline
◆
Type the following command:
hares -offline -parentprop resource -sys system
The command stops all parent resources in order before taking the specific
resource offline.
To take a resource offline and propagate the command to its children
◆
Type the following command:
hares -offprop [-ignoreparent] resource -sys system
As in the above command, the option -ignoreparent enables a resource to
be taken offline even if its parent resources in the service group are online.
This option does not work if taking the resources offline violates the group
dependency.
Probing a resource
This topic describes how to probe a resource.
To prompt an agent to monitor a resource on a system
◆
Type the following command:
hares -probe resource -sys system
Though the command may return immediately, the monitoring process may
not be completed by the time the command returns.
Clearing a resource
This topic describes how to clear a resource.
216
Administering the cluster from the command line
About administering resource types
To clear a resource
◆
Type the following command:
Initiate a state change from RESOURCE_FAULTED to RESOURCE_OFFLINE:
hares -clear resource [-sys system]
Clearing a resource initiates the online process previously blocked while waiting
for the resource to become clear. If system is not specified, the fault is cleared
on each system in the service group’s SystemList attribute.
See “Clearing faulted resources in a service group” on page 208.
This command also clears the resource’s parents. Persistent resources whose
static attribute Operations is defined as None cannot be cleared with this
command and must be physically attended to, such as replacing a raw disk.
The agent then updates the status automatically.
About administering resource types
Administration of resource types includes the following activities:
Adding, deleting, and modifying resource types
After you create a resource type, use the haattr command to add its attributes.
By default, resource type information is stored in the types.cf configuration file.
To add a resource type
◆
Type the following command:
hatype -add resource_type
To delete a resource type
◆
Type the following command:
hatype -delete resource_type
You must delete all resources of the type before deleting the resource type.
217
Administering the cluster from the command line
Administering systems
To add or modify resource types in main.cf without shutting down VCS
◆
Type the following command:
hatype -modify resource_type SourceFile "./resource_type.cf"
The information regarding resource_type is stored in the file
config/resource_type.cf, and an include line for resource_type.cf is
added to the main.cf file. Make sure that the path to the SourceFile exists on
all nodes before you run this command.
To set the value of static resource type attributes
◆
Type the following command for a scalar attribute:
hatype -modify resource_type attribute value
For more information, type:
hatype -help -modify
Overriding resource type static attributes
You can override some resource type static attributes and assign them
resource-specific values. When a static attribute is overriden and the configuration
is saved, the main.cf file includes a line in the resource definition for the static
attribute and its overriden value.
To override a type’s static attribute
◆
Type the following command:
hares -override resource static_attribute
To restore default settings to a type’s static attribute
◆
Type the following command:
hares -undo_override resource static_attribute
Administering systems
Administration of systems includes tasks such as modifying system attributes,
freezing or unfreezing systems, and running commands.
218
Administering the cluster from the command line
Administering systems
To modify a system’s attributes
◆
Type the following command:
hasys -modify modify_options
Some attributes are internal to VCS and cannot be modified.
See “About the -modify option” on page 183.
To display the value of a system’s node ID as defined in the llttab file
◆
Type the following command to display the value of a system’s node ID as
defined in the following file:
%VCS_HOME%\comms\llt\llttab.txt
hasys -nodeid [node_ID]
To freeze a system (prevent groups from being brought online or switched on the
system)
◆
Type the following command:
hasys -freeze [-persistent] [-evacuate] system
-persistent
Enables the freeze to be "remembered" when the cluster is
rebooted. Note that the cluster configuration must be in read/write
mode and must be saved to disk (dumped) to enable the freeze
to be remembered.
-evacuate
Fails over the system’s active service groups to another system
in the cluster before the freeze is enabled.
To unfreeze a frozen system (reenable online and switch of service groups)
◆
Type the following command:
hasys -unfreeze [-persistent] system
219
Administering the cluster from the command line
About administering clusters
To run a command on any system in a cluster
◆
Type the following command:
hacli -cmd command [-sys | -server system(s)]
Issues a command to be executed on the specified system(s). VCS must be
running on the systems.
The use of the hacli command requires setting HacliUserLevel to at least
COMMANDROOT. By default, the HacliUserLevel setting is NONE.
If the users do not want the root user on system A to enjoy root privileges on
another system B, HacliUserLevel should remain set to NONE (the default) on
system B.
You can specify multiple systems separated by a single space as arguments
to the option -sys. If no system is specified, command runs on all systems in
cluster with VCS in a RUNNING state. The command argument must be entered
within double quotes if command includes any delimiters or options.
About administering clusters
Administration of clusters includes the following activities:
Retrieving version information
This topic describes how to retrieve information about the version of VCS running
on the system.
To retrieve information about the VCS version on the system
1
Run one of the following commands to retrieve information about the engine
version, the join version, the build date, and the PSTAMP.
had -version
hastart -version
2
Run the following command to retrieve information about the engine version.
hastart -v
220
Administering the cluster from the command line
Using the -wait option in scripts that use VCS commands
Using the -wait option in scripts that use VCS
commands
The -wait option is for use in the scripts that use VCS commands to wait till an
attribute value changes to the specified value. The option blocks the VCS command
until the value of the specified attribute is changed or until the specified timeout
expires. Specify the timeout in seconds.
The option can be used only with changes to scalar attributes.
The -wait option is supported with the following commands:
haclus
haclus -wait attribute value
[-clus cluster] [-time timeout]
Use the -clus option in a global cluster environment.
hagrp
hagrp -wait group attribute value
[-clus cluster] [-sys system] [-time timeout]
Use the -sys option when the scope of the attribute is local.
Use the -clus option in a global cluster environment.
hares
hares -wait resource attribute value
[-clus cluster] [-sys system] [-time timeout]
Use the -sys option when the scope of the attribute is local.
Use the -clus option in a global cluster environment.
hasys
hasys -wait system attribute value
[-clus cluster] [-time timeout]
Use the -clus option in a global cluster environment.
About administering simulated clusters from the
command line
VCS Simulator is a tool to assist you in building and simulating cluster configurations.
With VCS Simulator you can predict service group behavior during cluster or system
faults, view state transitions, and designate and fine-tune various configuration
parameters. This tool is especially useful when you evaluate complex, multi-node
configurations. It is convenient in that you can design a specific configuration without
test clusters or changes to existing configurations.
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About administering simulated clusters from the command line
You can also fine-tune values for attributes that govern the rules of failover, such
as Load and Capacity in a simulated environment. VCS Simulator enables you to
simulate various configurations and provides the information that you need to make
the right choices. It also enables simulating global clusters.
See “About VCS Simulator” on page 359.
222
Chapter
8
Configuring resources and
applications in VCS
This chapter includes the following topics:
■
About configuring resources and applications
■
About Virtual Business Services
■
About Intelligent Resource Monitoring (IMF)
■
About fast failover
■
How VCS monitors storage components
■
About storage configuration
■
About configuring network resources
■
About configuring file shares
■
About configuring print shares
■
About configuring IIS sites
■
About configuring services
■
About configuring processes
■
About configuring Microsoft Message Queuing (MSMQ)
■
About configuring the infrastructure and support agents
■
About configuring applications using the Application Configuration Wizard
■
Configuring the service group in a non-shared storage environment
Configuring resources and applications in VCS
About configuring resources and applications
■
About the VCS Application Manager utility
■
About testing resource failover using virtual fire drills
About configuring resources and applications
VCS monitors resources using agents. VCS detects the state of an application by
continuously monitoring resources used by an application. If all resources required
by the application are available, VCS declares the application as available.
Refer to the Veritas Cluster Server Bundled Agents Reference Guide for a
description of the agents provided by VCS.
VCS provides configuration wizards to configure commonly-used resources. You
can also use Cluster Manager (Java console) and the command line to configure
resources.
Note: When modifying agent attributes from the Cluster Manager (Java console),
use a single slash (\) to denote path names. When manually editing the configuration
file main.cf directly, use double slashes (\\).
Configuring resources and applications in VCS involves the following tasks:
■
Creating a service group comprising all resources required for the application
and then configuring the resources.
For example, to configure a database in VCS, you must configure resources for
the database and for the underlying shared storage and network. Configuring
a resource involves defining values for its attributes. The resources must be
logically grouped in a service group. When a resource faults, the entire service
group fails over to another node.
■
Assigning dependencies between resources.
For example, a MountV resource depends on a VMDg resource. Similarly, an
IP resource depends on a NIC resource.
■
Bringing the service group online.
Windows Server 2008 and 2008 R2 considerations
Consider the following items before configuring VCS resources and service groups
on Windows Server 2008 and Windows Server 2008 R2 systems:
■
User Access Control (UAC)
On Windows Server 2008, if User Access Control (UAC) is enabled and
configured, non-default administrators cannot run VCS commands from the
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About Virtual Business Services
command prompt. All VCS commands must be run from the command prompt
in the Run as administrator mode. To launch the command prompt in the Run
as administrator mode, right-click the command prompt shortcut from the
Windows Start menu and click Run as administrator from the context menu.
See the Microsoft documentation for more information on UAC.
■
Windows Firewall
If you have configured the Windows firewall on Windows Server 2008, ensure
that the firewall settings allow access to the services and ports used by SFW
HA.
Refer to the Veritas Storage Foundation Installation and Upgrade Guide for a
detailed list of SFW HA services and ports used.
■
Windows Server 2008 Server Core
If you want to configure VCS resources and service groups on Windows Server
2008 Server Core systems, you must manually add the required resources and
configure the service groups. You can perform the steps either directly on the
Server Core machine using the command line, or remotely using the Cluster
Manager (Java console).
See “About the Cluster Manager (Java Console)” on page 101.
See “About administering VCS from the command line” on page 182.
Before configuring resources and service groups, review the resource types and
the attribute definitions described in the Veritas Cluster Server Bundled Agents
Reference Guide.
About Virtual Business Services
Virtual Business Services provide continuous high availability and reduce frequency
and duration of service disruptions for multi-tier business applications running on
heterogeneous operating systems and virtualization technologies. A Virtual Business
Service represents the multi-tier application as a single consolidated entity and
builds on the high availability and disaster recovery provided for the individual tiers
by Symantec products such as Symantec Cluster Server and Symantec
ApplicationHA. Additionally, a Virtual Business Service can also represent all the
assets used by the service such as arrays, hosts, and file systems, though they are
not migrated between server tiers. A Virtual Business Service provides a single
consolidated entity that represents a multi-tier business service in its entirety.
Application components that are managed by Symantec Cluster Server or Symantec
ApplicationHA can be actively managed through a Virtual Business Service.
You can configure and manage Virtual Business Services created in Veritas
Operations Manager by using Veritas Operations Manager Virtual Business Services
Availability Add-on. Besides providing all the functionality that was earlier available
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About Virtual Business Services
through Business Entity Operations Add-on, VBS Availability Add-on provides the
additional ability to configure fault dependencies between the components of the
multi-tier application.
Note: All the Application Entities that were created using Veritas Operations Manager
Virtual Business Service Operations Add-on versions 3.1 and 4.0 are available as
Virtual Business Services after you deploy the VBS Availability Add-on in Veritas
Operations Manager . Veritas Operations Manager is a prerequisite for running
Virtual Business Services.
Features of Virtual Business Services
You can use the VBS Availability Add-on to perform the following tasks:
■
Start Virtual Business Services from the Veritas Operations Manager console.
When a Virtual Business Service starts, its associated service groups are brought
online.
■
Stop Virtual Business Services from the Veritas Operations Manager console.
When a Virtual Business Service stops, its associated service groups are taken
offline.
Applications that are under the control of Symantec ApplicationHA can be part
of a Virtual Business Service. Symantec ApplicationHA enables starting, stopping,
and monitoring of an application within a virtual machine.
If applications are hosted on VMware virtual machines, you can configure the
virtual machines to automatically start or stop when you start or stop the Virtual
Business Service.
■
Establish service group relationships and set the order to bring service groups
online and to take them offline. It ensures that the service groups from different
clusters are brought online or taken offline in the correct order. This order is
governed by the service group's relationships with other service groups, which
are referred to as child service groups. Setting the correct order of service group
dependency is critical to achieve business continuity and high availability.
■
Establish service group relationships and specify the required reaction of an
application component to a high availability event in an underlying tier.
■
Manage the Virtual Business Service from Veritas Operations Manager or from
the clusters participating in the Virtual Business Service.
■
Recover the entire Virtual Business Service to a remote site when a disaster
occurs.
However, the following operations cannot be managed using VBS Availability
Add-on:
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■
The service group operations that are performed using the Veritas Cluster Server
management console.
■
The service group operations that are performed using the Veritas Cluster Server
command-line interface.
■
The service group operations that are performed using the Veritas Cluster Server
Java console.
■
VBS Availability Add-on is not supported for composite Virtual Business Services.
You can use it only for Virtual Business Services.
Note: You must install the VRTSvbs on the cluster nodes to enable fault management
and to administer the Virtual Business Service from the participating clusters.
Sample Virtual Business Service configuration
This section provides a sample Virtual Business Service configuration comprising
a multi-tier application. Figure 8-1 shows a Finance application that is dependent
on components that run on three different operating systems and on three different
clusters.
■
Databases such as Oracle running on Solaris operating systems form the
database tier.
■
Middleware applications such as WebSphere running on AIX operating systems
form the middle tier.
■
Web applications such as Apache and IIS running on Windows and Linux virtual
machines form the Web tier. This tier is composed of ApplicationHA nodes.
Each tier can have its own high availability mechanism. For example, you can
use for the databases and middleware applications, and Symantec ApplicationHA
for the Web servers.
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Figure 8-1
Sample Virtual Business Service configuration
Each time you start the Finance business application, typically you need to bring
the components online in the following order – Oracle database, WebSphere,
Apache and IIS. In addition, you must bring the virtual machines online before you
start the Web tier. To stop the Finance application, you must take the components
offline in the reverse order. From the business perspective, the Finance service is
unavailable if any of the tiers becomes unavailable.
When you configure the Finance application as a Virtual Business Service, you can
specify that the Oracle database must start first, followed by WebSphere and the
Web servers. The reverse order automatically applies when you stop the Virtual
Business Service. When you start or stop the Virtual Business Service, the
components of the service are started or stopped in the defined order.
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About Intelligent Resource Monitoring (IMF)
For more information about Virtual Business Services, refer to the Virtual Business
Service–Availability User’s Guide.
About Intelligent Resource Monitoring (IMF)
VCS traditionally uses a poll-based mechanism to detect the state of the configured
applications and the underlying storage and network components. The agents
retrieve the respective resource status during the monitor function. The monitor
function is periodic and the frequency is defined by the resource type level attributes,
MonitorInterval and OfflineMonitorInterval.
Intelligent Monitoring Framework (IMF) provides an alternative method for VCS to
determine the resource status. IMF employs an event-based monitoring framework
that is implemented using custom as well as native operating system-based
notification mechanisms.
In poll-based monitoring, the resource state change detection is dependent on the
monitor interval. Any state change that occurs immediately after a monitor cycle
has completed is detected only in the next monitor cycle. This causes delays in
fault detection. If the monitor interval attributes are set lower values, then in
configurations with a large number of resources, poll-based monitoring may get
CPU-intensive.
IMF uses an event-driven design that is asynchronous and provides instantaneous
resource state change notifications. A resource state change event is quickly
detected by VCS agents and then communicated to the VCS engine for further
action. This improves the fault detection capability significantly allowing VCS to
take corrective actions faster and that results in reduced service group failover
times.
Note: The actual intelligent monitoring for a VCS resource starts only after two
consecutive traditional monitor cycles have run and have returned the same state
for that resource. So it takes some time before you see positive performance effect
after enabling IMF.
The benefits of intelligent monitoring over poll-based monitoring are as follows:
■
Instantaneous notification
Faster notification of resource state changes result in improved service group
failover times.
■
Reduction in system resource utilization
Reduced CPU utilization by VCS agent processes when number of resources
being monitored is high. This provides significant performance benefits in terms
of system resource utilization.
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■
Ability to monitor large number of resources
With reduced CPU consumption, IMF enables VCS to effectively monitor a large
number of resources.
VCS changes to support IMF
IMF is an extension of the VCS agent framework. New IMF-related functions are
added to the framework. The VCS agents can use these functions to register for
IMF-based monitoring and communicate the resource state changes to the VCS
high availability engine (HAD).
Agent Function
Description
imf_init
Initializes the agent interface for IMF-based monitoring. This function
runs when the agent starts up.
imf_getnotification
Gets notification about resource state changes. This function runs
after the agent interface is initialized for IMF-based monitoring.
During this function the agent continuously waits for an event and
takes action on the resource upon notification.
imf_register
Agents use this function to register or unregister resource entities
for IMF-based monitoring. For example, to register a process
resource, the agent uses the process ID (PID) of the configured
process for online monitoring of the process.
This function runs for each resource after the resource has reported
the same steady state (either online or offline) for two consecutive
monitor cycles.
Apart from the new agent functions, a new resource type level attribute, IMF, is
introduced. The IMF attribute has three keys: Mode, MonitorFreq, RegisterRetryLimit.
A combination of these keys determine whether or not an agent uses IMF-based
monitoring for the corresponding resource type.
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Resource Type
Attribute
Description
IMF
Determines whether the IMF-aware agent must perform intelligent
resource monitoring. You can also override the value of this
attribute at resource-level.
Type and dimension: integer-association
This attribute includes the following keys:
■
Mode
Define this attribute to enable or disable intelligent resource
monitoring.
This key takes the following values:
■ 0 —Does not perform intelligent resource monitoring
1 —Performs intelligent resource monitoring for offline
resources and poll-based monitoring for online resources
■ 2 —Performs intelligent resource monitoring for online
resources and poll-based monitoring for offline resources
■ 3 —Performs intelligent resource monitoring for both online
and for offline resources
Default value is 3.
MonitorFreq
This key value specifies the frequency at which the agent
invokes the monitor agent function. The value of this key is an
integer.
■
■
After the resource is registered for IMF-based monitoring, the
agent calls the monitor agent function as follows:
■ For online resources: (MonitorFreq X MonitorInterval)
number of seconds.
■ For offline resources: (MonitorFreq X OfflineMonitorInterval)
number of seconds.
For agents that support IMF, the default value is 5.
You can set this attribute to a non-zero value in cases where
the agent requires to perform poll-based resource monitoring
in addition to the intelligent resource monitoring.
See the Veritas Cluster Server Bundled Agents Reference
Guide for agent-specific recommendations.
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Resource Type
Attribute
Description
■
IMFRegList
RegisterRetryLimit
If you enable IMF-based monitoring, the agent runs the
imf_register function to register the resource. The value of the
RegisterRetryLimit key determines the number of times the
agent must retry registration for a resource.
If the agent cannot register the resource within the limit that is
specified, then intelligent monitoring is disabled until the
resource state changes or the value of the Mode key changes.
Default value is 3.
An ordered list of attributes whose values are registered for
IMF-based monitoring.
Type and dimension: string-vector
Default: Not applicable
VCS agents that support IMF
The following agents support IMF-based monitoring:
■
GenericService, ServiceMonitor
The agents trap the Windows service related events and takes appropriate
action if a configured service stops or fails to respond.
■
IP, NIC
These agents rely on the network and hardware events raised by the operating
system. For example, an event is raised when an IP address becomes
unavailable or when a network adapter is disabled.
■
MountV, Mount
The agents use the PnP notifications generated by the operating system. In
addition, the agent also uses custom notifications generated by Storage
Foundation for Windows (SFW). For example, PnP notifications are generated
for volume arrival or departure, volume failure, and file system notifications.
■
VMDg
This agent relies on the disk group related PnP notifications raised by Storage
Foundation for Windows (SFW). For example, SFW raises PnP notifications for
disk group import and deport state change, and for disk group access state
change (read-only, read/write).
■
Oracle, NetLsnr
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The agents trap the Windows service related events and takes appropriate
action if a configured service stops or fails to respond.
■
Process, RegRep
The Process agent supports IMF-based monitoring only when the resource is
in the online state.
■
SQLServer2005, SQLAgService2005, SQLOlapService2005, MSDTC
■
SQLServer2008
This agent traps the Windows service related events and takes appropriate
action if the configured SQL Server 2008 services stop or fail to respond.
■
IIS
IMF-based monitoring support is limited only to monitoring the IIS services (FTP
service, World Wide Web Publishing Service) that are necessary for the
functioning of IIS. The agent traps the Windows service related events and takes
appropriate action if a configured service stops or fails to respond. IMF is not
used for monitoring the availability of the sites configured.
■
ExchService2007, Exchange2010DB
How IMF works
The following steps outline how IMF-based monitoring works:
1.
After IMF is enabled for a resource, the corresponding VCS agent waits for
the resource to report the same steady state (whether online or offline) for two
consecutive monitor cycles and then registers the resource for IMF-based
monitoring.
2.
The VCS agent then registers itself for receiving specific custom or operating
system specific event notifications.
3.
If an event occurs, the agent determines the affected resource and then
executes a monitor cycle for that resource. The monitor cycle determines the
resource status and communicates it to the VCS engine (HAD). If the resource
state is offline, the VCS engine (HAD) may initiate a failover depending on the
configuration.
4.
If the resource state remains the same, the agent moves to a wait state and
then waits for the next event to occur.
How to enable IMF
IMF is enabled by default. However, you can manually enable it using the following
steps.
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About Intelligent Resource Monitoring (IMF)
To enable IMF
1
Change the VCS configuration to read/write mode.
Type the following at the command prompt:
haconf -makerw
2
Run the following command to enable intelligent resource monitoring:
■
To enable intelligent monitoring of offline resources:
hatype -modify resource_type IMF -update Mode 1
■
To enable intelligent monitoring of online resources:
hatype -modify resource_type IMF -update Mode 2
■
To enable intelligent monitoring of both online and offline resources:
hatype -modify resource_type IMF -update Mode 3
3
Change values of MonitorFreq and the RegisterRetryLimit keys of the IMF
attribute.
4
Save the VCS configuration.
Type the following at the command prompt:
haconf -dump -makero
How to disable IMF
IMF is enabled by default. Perform the following steps to disable it manually.
To disable IMF
1
Change the VCS configuration to read/write mode.
Type the following at the command prompt:
haconf -makerw
2
Run the following commands to disable intelligent resource monitoring:
■
To disable intelligent resource monitoring for all the resources of a certain
type, run the following command:
hatype -modify resource_type IMF -update Mode 0
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■
b. To disable intelligent resource monitoring for a specific resource, run the
following commands:
hares -override resource_name IMF
hares -modify resource_name IMF -update Mode 0
3
Save the VCS configuration.
Type the following at the command prompt:
haconf -dump -makero
Recommended settings
Symantec recommends the following settings for faster failover and better
performance.
Modify the MountV resource attributes
To reduce failover time, set the following MountV resource attributes:
■
ListApplications = 0
This attribute defines whether the agent lists the applications that are accessing
the volume while unmounting. Setting it to 0 avoids this enumeration and saves
time during failover.
■
ForceUnmount = ALL
Defines whether or not the agent unmounts the volume (either gracefully or
forcibly) when it is being used by other applications. This graceful/forceful
unmount takes additional time to close the Read-Only handles. Setting this to
ALL saves time during failover.
Modify the attribute values for SQL Analysis Service and SQL
Server Agent resources
Change the value of DelayAfterOnline and DelayAfterOffline attributes from the
default to 25 for MS-Olap and SQL Server Agent resources.
The GenericService resources for MS-Olap service and SQL Server Agent service
goes into an unknown state while trying to bring these services online. If the value
of DelayAfterOnline and DelayAfterOffline attributes is set to 25 for MS-Olap and
SQL Server Agent resources, then these resources come online without reporting
unknown.
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About fast failover
Modify the NumThreads attribute for MountV and VMDg
The VCS agent framework uses multithreading to allow multiple resource operations
to run in parallel for the same type of resources. The NumThreads type level attribute
value determines the number of threads for all the resource types.
■
For large configurations, typically over 50 MountV resources, Symantec
recommends that you set the MountV resource type NumThreads attribute value
to 20.
■
For large configurations, typically over 10 VMDg resources, Symantec
recommends that you set the VMDg resource type NumThreads attribute value
to 20.
About fast failover
Fast failover is a new feature that improves the failover time for the storage stack
configured in a clustered environment. Fast failover includes several design changes
and enhancements to the core SFW components. These changes provide significant
reduction in the failover time taken by storage resources during service group
failovers.
Fast failover integrates with the IMF feature to provide a significant performance
improvement in SFW HA cluster environments. Fast failover requires a separate
license. Fast failover appears as a selectable option in the SFW HA installer. Even
though fast failover is installed and enabled, it will not work if the license does not
support this feature.
Refer to the SFW Administrator's Guide for more information about fast failover.
VCS changes for fast failover
To support the fast failover feature, a new attribute, FastFailOver, is added to the
VCS Volume Manager Diskgroup (VMDg) agent. This attribute decides whether or
not a disk group is enabled for fast failover.
The FastFailOver attribute can take values of 1 and 0. The value 1 indicates that
the agent enables fast failover for the configured disk group. The default value 0
indicates that fast failover is disabled for the disk group.
Refer to the Veritas Cluster Server Bundled Agents Reference Guide for more
information about the VMDg agent.
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Enabling fast failover for disk groups
Perform the following steps to enable fast failover for VMDg resources in service
groups.
To enable the FastFailover attribute for a VMDg resource
1
In Cluster Manager (Java Console), select a service group withVMDg resource
configured for it. Select the Properties tab from the right pane.
2
Scroll down to choose the FastFailOver attribute and click to edit the attribute
value.
3
In the Edit Attribute dialog box, check the FastFailOver check box and then
click OK.
4
Repeat these steps for every VMDg resource in the service groups.
How VCS monitors storage components
Veritas Cluster Server provides specific agents that monitor storage components
and ensure that the shared disks, disk groups, LUNs, volumes, and mounts are
accessible on the system where the application is running. Separate agents are
available for shared and non-shared storage and for third-party storage arrays such
as NetApp filers. Your storage configuration determines which agent should be
used in the high availability configuration.
For details on the various Veritas Cluster Server storage agents, refer to the Veritas
Cluster Server Bundled Agents Reference Guide.
Shared storage—if you use NetApp filers
The Veritas Cluster Server hardware replication agents for NetApp provide failover
support and recovery in environments that employ NetApp filers for storage and
NetApp SnapMirror for replication. The agents enable configuring NetApp filers
over an iSCSI or Fibre Channel (FC) connection in a Veritas Cluster Server cluster
environment.
The Veritas Cluster Server agents for NetApp are as follows:
■
NetAppFiler
■
NetAppSnapDrive
■
NetAppSnapMirror
These agents monitor and manage the state of replicated filer devices and ensure
that only one system has safe and exclusive access to the configured devices at a
time. The agents can be used in local clusters, single Veritas Cluster Server
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replicated data clusters, and multi-cluster environments that are set up using the
Veritas Cluster Server Global Cluster Option (GCO).
In a typical configuration, the agents are installed on each system in the cluster.
The systems are connected to the NetApp filers through a dedicated (private)
storage network. Veritas Cluster Server cluster systems are physically attached to
the NetApp filer via an ethernet cable supporting iSCSI or FC as the transport
protocol.
Veritas Cluster Server also provides agents for other third-party hardware arrays.
For details on the supported arrays, refer to the product Software Compatibility List
(SCL).
Shared storage—if you use SFW to manage cluster dynamic disk
groups
The Veritas Cluster Server MountV and VMDg agents are used to monitor shared
storage that is managed using Storage Foundation for Windows (SFW). SFW
manages storage by creating disk groups from physical disks. These disk groups
are further divided into volumes that are mounted on the cluster systems.
The MountV agent monitors volumes residing on disk groups. The VMDg agent
monitors cluster dynamic disk groups and is designed to work using SCSI
reservations. Together the MountV and VMDg agents ensure that the shared cluster
dynamic disk groups and volumes are available.
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Shared storage—if you use Windows LDM to manage shared disks
The Veritas Cluster Server Mount and DiskReservation (DiskRes) agents are used
to monitor shared disks that are managed using Windows Logical Disk Management
(LDM).
The Mount agent monitors basic disks and mount points and ensures that each
system is able to access the volume or mount path in the same way. The DiskRes
agent monitors shared disks and uses persistent reservation to ensure that only
one system has exclusive access to the disks. During failovers, these agents ensure
that the disks and volumes are deported and imported on the node where the
application is running.
Non-shared storage—if you use SFW to manage dynamic disk groups
Veritas Cluster Server introduces the Volume Manager Non-Shared Diskgroup
(VMNSDg) agent to support local non-shared storage configurations that are
managed using SFW. The VMNSDg agent works without SCSI reservations and
is designed for locally attached storage devices that do not support SCSI.
The VMNSDg agent monitors and manages the import and deport of dynamic disk
groups created on local storage. The only difference between the VMDg agent and
the VMNSDg agent is that the VMDg agent is designed for shared cluster dynamic
disk groups and uses SCSI reservations, whereas the VMNSDg agent supports
only non-shared local dynamic disk groups and works without SCSI reservations.
The VMNSDg agent can be used to set up single node Replicated Data Clusters
(RDC) or Disaster Recovery (DR) configurations with replication set up between
the sites.
During a failover, the Veritas Cluster Server MountV and VMNSDg agents deport
the locally attached storage from the affected node and then import the locally
attached storage of the target node. Replication ensures that the data is consistent
and the application is up and running successfully.
Note: The VMNSDg agent does not support fast failover and Intelligent Monitoring
Framework (IMF).
Non-shared storage—if you use Windows LDM to manage local
disks
Veritas Cluster Server introduces the NativeDisks agent to support local non-shared
storage configurations managed using Windows LDM. The NativeDisks agent works
without SCSI reservations and is designed for local storage that does not support
SCSI.
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About storage configuration
Together with the Mount agent, the NativeDisks agent monitors and manages the
import and deport of basic local disks on the system. The only difference between
the DiskRes agent and the NativeDisks agent is that the DiskRes agent is designed
for shared disks and uses SCSI reservations, whereas the NativeDisks agent
supports only non-shared local disks and works without SCSI reservations.
Note: The NativeDisks agent does not support fast failover and Intelligent Monitoring
Framework (IMF).
Non-shared storage—if you use VMware storage
Veritas Cluster Server introduces the VMwareDisks agent to support storage
configurations in a VMware virtual environment. The agent is platform independent
and supports VMware Virtual Machine Disk (VMDK), Raw Device Mapping (RDM)
disk files (virtual), and storage that is configured using Network File System (NFS).
The VMwareDisks agent works without SCSI reservations and supports locally
attached non-shared storage.
VMware features such as snapshots, vMotion, and DRS do not work when SCSI
disks are shared between virtual machines. The VMwareDisks agent is designed
to address this limitation. With this agent, the disks can now be attached to a single
virtual machine at a time in the Veritas Cluster Server cluster. On failover, along
with the service group, the VMwareDisks agent moves the disks to the target virtual
machine.
The VMwareDisks agent communicates with the host ESXi server to configure
storage. This agent manages the disk attach and detach operations on a virtual
machine in the Veritas Cluster Server cluster. The agent is VMware HA aware.
During failovers, the agent detaches the disk from one system and then attaches
it to the system where the application is actively running. The VMwareDisks agent
presents the virtual disks to the operating system. On Windows, the agent relies
on the VMNSDg agent (in case of SFW-managed local storage) and the NativeDisks
agent (in case of LDM-managed local storage) for initializing and managing the
virtual disks. On Linux, the agent relies on the LVM and VxVM agents.
Note: The VMwareDisks agent does not support fast failover and Intelligent
Monitoring Framework (IMF).
About storage configuration
Preview the following requirements before you configure shared storage:
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About storage configuration
■
If your configuration uses shared disks and volumes managed by using Windows
Logical Disk Manager (LDM), use the VCS DiskReservation and Mount agents.
If you use LDM to manage non-shared local storage, use the VCS Mount and
NativeDisks agents. For VMware storage environments, use the VMwareDisks
agent in combination with the NativeDisks agent.
See “About managing storage using Windows Logical Disk Manager” on page 241.
■
If your configuration uses shared volumes or Logical Unit Numbers (LUNs)
managed in a Network Appliance storage environment, use the VCS
NetAppSnapDrive and NetAppFiler agents. For NetApp replication, use the
NetAppSnapMirror agent.
See “About managing storage in a Network Appliance storage environment”
on page 246.
■
If your configuration uses shared disks and volumes that are managed by using
Storage Foundation for Windows (SFW), use the VCS MountV and VMDg
agents. If you use SFW to manage non-shared local storage, use the VCS
MountV and VMNSDg agents. For VMware storage environments, use the
VMwareDisks agent in combination with the VMNSDg agent.
See “About managing shared storage using Storage Foundation for Windows”
on page 248.
Before you configure the storage, review the resource type and the attribute
definitions of these agents in the Veritas Cluster Server Bundled Agents Reference
Guide.
About managing storage using Windows Logical Disk Manager
Before configuring storage, review the resource type and the attribute definitions
of the Mount, DiskRes, NativeDisks, and VMwareDisks agents described in the
Veritas Cluster Server Bundled Agents Reference Guide.
The following restrictions apply in this release:
■
Mount, DiskRes, and NativeDisks agents are supported on VCS for Windows
only. These agents are not supported if the storage is managed using Storage
Foundation for Windows (SFW).
■
If you are using shared storage, your storage devices must be configured to
use SCSI-2 disk reservations. SCSI-3 is not supported.
SCSI support is not required if you are using non-shared storage.
■
LDM support is not applicable for Disaster Recovery configurations. Currently
only HA configurations are supported.
Note the following prerequisites before configuring shared storage:
■
Verify that the disk signature is the same on all systems sharing the disk.
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■
Install software drivers for the disk controller device identically on each system
in the cluster. Verify that these driver services run successfully on all systems.
■
Disable the option Reset SCSI Bus at IC Initialization from the SCSI Select
utility.
■
If using the agents in a Fibre Channel (FC) setup, enable target resets for the
adapters.
■
Verify that the device path to the disk is recognized by each system sharing the
disk.
■
Disable the write cache on the internal SCSI RAID controller.
■
For each system, unassign the drive letter for the disk device path configured
for mounting.
■
If User Access Control (UAC) is enabled on Windows Server systems, you must
launch the command prompt in the Run as administrator mode and then run
the commands mentioned in this procedure.
To launch the command prompt in the administrator mode, right-click the
command prompt shortcut from the Windows Start menu and click Run as
administrator from the context menu.
Reserving disks (if you use Windows LDM)
Complete the following steps to reserve the disks on the node on which you are
going to perform the application installation.
These steps are required only if you are configuring shared storage. Skip these
steps for a non-shared storage configuration.
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To reserve the disks
1
To display all the disks, type the following on the command line:
C:\>havol -scsitest /l
Make a note of the disk numbers (Disk# column in the table). You will need it
in the next step.
2
To reserve a disk, type the following on the command line:
C:\>havol -scsitest /RES:<disk #>
For example, to reserve disk #4, type:
C:\>havol -scsitest /RES:4
Make a note of the disk number and the corresponding signature. You will
require these details to identify and reserve the disks during installation and
while configuring the service group, on additional nodes in the cluster.
Creating volumes (if you use Windows LDM)
Perform the following steps to create volumes.
To create volumes
1
Use the Windows Disk Management tool to verify that the disks are visible on
the cluster nodes, and then create volumes on the disks.
2
In case of shared storage, after creating the required volumes on a node,
release the reserved disks from that node.
See “Releasing disks (if you use Windows LDM)” on page 244.
3
3. In case of shared storage, rescan the disks on all the remaining nodes in
the cluster.
Refer to Microsoft Windows documentation for more information about the Disk
Management tool.
Mounting volumes (if you use Windows LDM)
Perform the following steps to mount volumes on a cluster node.
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To mount a volume
1
Use the Windows Disk Management tool to mount the volumes that you created
earlier.
2
After mounting the volumes on a cluster node, run the CHKDSK command and
verify that there are no errors on the mounted volumes.
3
Make a note of the drive letters that you assign to the mounted volumes.
Use the same drive letters while mounting these volumes on the remaining
cluster nodes.
Refer to Microsoft Windows documentation for more information about the
CHKDSK command and the Disk Management tool.
Unassigning a drive letter
In case of a shared storage configuration, while installing an application on multiple
nodes, you must first unassign drive letters and release the disks from one node,
and then reserve the disks, mount the volumes using the same drive letters and
then install the application on the failover node.
These steps are required only if you are configuring shared storage. Skip these
steps for a non-shared storage configuration.
Note: You must run Disk Management on all systems each time you add a shared
disk. This ensures each disk has a valid signature written to it, and that the device
paths and symbolic links are updated.
Complete these steps to unassign the drive letters from a node.
To unassign drive letter
1
Log in as Administrator.
2
Open Disk Management. Type the following at the command prompt:
C:\> diskmgmt.msc
3
Right-click the partition or logical drive and click Change Drive Letter and
Path.
4
In the Change Drive Letter and Paths dialog box, click the drive letter and
click Remove.
Releasing disks (if you use Windows LDM)
Perform the following steps to release reserved disks from a cluster node.
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These steps are required only if you are configuring shared storage. Skip these
steps for a non-shared storage configuration.
To release disks
1
To display all the disks, type the following on the command line:
C:\>havol -scsitest /l
Make a note of the disk numbers (Disk# column in the table) of the disk that
you wish to release. You will need it in the next step.
2
To release a reserved disk, type the following on the command line:
C:\>havol -scsitest /REL:<disk #>
For example, to release disk 4, type:
C:\>havol -scsitest /REL:4
Make a note of the disk number and the corresponding signature. You may
require these details to identify and reserve the disks later.
Configuration tasks
This topic describes how to manually configure Mount and DiskRes resources in
the cluster.
The same steps apply if you wish to configure any of the VCS agents manually.
Refer to the application-specific agent or solutions guide for attribute details of the
application agents and the VCS Bundled Agents Reference Guide for details about
the storage, network, services, and other infrastructure agents.
1
In your service group, create resources of type DiskReservation and Mount.
See “Adding a resource” on page 152.
2
Configure the following required attributes for the following resources:
DiskReservation Resource
■
Signatures: An array specifying the signature of each SCSI disk. VCS
provides the havol utility to retrieve disk signatures.
See “The havol utility” on page 586.
Mount Resource
■
MountPath: The drive letter or path to an empty NTFS folder that will be
assigned to the volume being mounted.
■
PartitionNo: The partition on the disk configured for mounting.
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■
3
Signature: A system-specified disk identifier. VCS provides the havol utility
to retrieve the disk signature.
See “The havol utility” on page 586.
Link the Mount and DiskReservation resources such that the Mount resource
depends on the DiskReservation resource.
See “Linking resources” on page 162.
4
Configure other resources in the service group, if required.
5
Bring the Mount resource online.
About managing storage in a Network Appliance storage environment
Network Appliance (NetApp) manages data by creating volumes on physical disks.
These volumes can be divided further into Logical Unit Numbers (LUNs). The LUNs
are accessible from the cluster nodes, provided the nodes have Microsoft iSCSI
Initiator and Network Appliance SnapDrive installed. If you plan to use Fibre Channel
(FC) for connecting the LUNs, ensure that you install the NetApp FCP Attach Kit
on all the cluster nodes.
Perform the following tasks to create the required LUNs on the Network Appliance
Filer and to make them accessible from cluster nodes:
■
Create volumes on the Network Appliance Filer.
■
Share the volumes.
■
Create LUNs on the shared volumes.
Refer to Network Appliance documentation for instructions on performing these
tasks.
Configuring Microsoft iSCSI Initiator
The Microsoft iSCSI initiator enables communication between Windows systems
and Network Appliance Filers. The initiator uses the iSCSI protocol to present the
filer volume as a local block device to the system.
To configure Microsoft iSCSI initiator on a Windows Server 2008 system
1
Start the Microsoft iSCSI initiator.
2
On the Discovery tab, click Add Portal.
3
On the Add Target Portals dialog box, specify the DNS name for the Network
Appliance Filer and then click OK.
4
On the Targets tab, click Log On.
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5
In the Log On to Target dialog box, clear the Automatically restore this
connection when the system reboots check box and then click OK.
6
On the Targets tab, verify that the newly added target portal is listed under the
Select a target box and status shows connected, and then click OK.
To configure Microsoft iSCSI initiator on a Windows Server 2008 R2 system
1
Start the Microsoft iSCSI initiator.
2
On the Discovery tab, click Discover Portal.
3
On the Discover Target Portal dialog box, specify the DNS name for the Network
Appliance Filer and then click OK.
4
On the Target tab, click Connect.
5
On the Connect to Target dialog box, clear the Add this connection to list
of Favorite Targets check box and then click OK.
6
On the Targets tab, verify that the newly added portal is listed under the Select
a target box and the status shows connected and then click OK.
Connecting virtual disks to the cluster node
Once the virtual disks are created on the NetApp filer, they must be connected (if
not connected already) to the cluster nodes using NetApp SnapDrive.
To connect virtual disks to the cluster node
1
On the cluster node where you want to connect the LUN, click Start > All
Programs > Administrative Tools > Computer Management to start the
Computer Management MMC.
2
From the left pane, expand Storage and double-click SnapDrive.
3
Right-click Disks and then click Connect Disk to launch the Connect Disk
wizard.
4
Click Next on the Welcome page.
5
Specify the path of the virtual disk that you wish to connect to the cluster node
and then click Next.
6
Select Dedicated as the Virtual Disk Type and then click Next.
7
Click Assign a Drive Letter and then choose a drive letter from the drop-down
list.
8
On the Select Initiator panel, specify the initiator(s) for the virtual disk and then
click Next.
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9
On the igroup Management Type panel, choose the option that allows
SnapDrive to perform igroup management automatically and then click Next.
10 Click Finish to begin connecting the specified virtual disk to the cluster node.
Disconnecting virtual disks from the cluster nodes
Perform the following steps to disconnect the virtual disks from a cluster node.
To disconnect virtual disks
1
On the cluster node where you want to disconnect the LUNs, click Start > All
Programs > Administrative Tools > Computer Management to start the
Computer Management MMC.
2
From the left pane, expand Storage and double-click SnapDrive.
3
Double-click Disks to see the LUNs that are connected to the node.
4
Right-click the LUN you want to disconnect and then click Disconnect Disk.
5
In the Disconnect Disk alert box, click OK.
About managing shared storage using Storage Foundation for
Windows
Before configuring shared storage, review the resource type and the attribute
definitions of the VMDg and the MountV agents in the Veritas Cluster Server Bundled
Agents Reference Guide.
Note: If your storage devices are SCSI-3 compliant and you want to use SCSI-3
Persistent Group Reservations (PGR), you must enable SCSI-3 support using the
Veritas Enterprise Administrator (VEA - Control Panel - System Settings). See the
Veritas Storage Foundation Administrator's Guide for more information.
Using SFW with VCS
The following advanced features of Storage Foundation for Windows (SFW) require
special consideration when used in a VCS environment:
■
Deporting Disk Groups
SFW does not allow disk groups configured as VCS resources to be deported.
They must be brought online or taken offline using VCS.
■
Dynamic Group Split and Join (DGSJ)
SFW does not allow splitting a disk group configured as a VCS resource if the
split operation causes a volume configured as a VCS resource to be part of the
target group.
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SFW does not allow a disk group configured as a VCS resource to be the source
disk group in a join operation.
■
Deleting Volumes
SFW does not allow deleting volumes configured as VCS resources.
■
Volume Snap Back
If a volume formed as a result of a Prepare and Snap Shot operation is configured
as a VCS resource, SFW does not allow Snap Back operations on the volume.
See the Veritas Storage Foundation Administrator's Guide for more information
about these operations.
Before you configure shared storage using SFW
Following are the prerequisites for managing shared storage using SFW:
■
Verify that SFW HA or VCS for Windows is installed on all cluster systems.
■
If you configured Windows Firewall, add port 2148 to the Firewall Exceptions
list.
For a detailed list of services and ports used by SFW HA, refer to the Veritas
Storage Foundation and High Availability Solutions for Windows Installation and
Upgrade Guide.
■
Configure the clustered disk group using Storage Foundation. Verify the disk
group contains shared disks only.
■
Disable the option Reset SCSI Bus at IC Initialization from the SCSI Select
utility.
■
Create a separate clustered disk group for each application to be clustered. Do
not create a clustered disk group for more than one application. Configure all
volumes or LUNs to be part of the VCS configuration and of the same service
group.
■
Assign a unique disk group name to each clustered disk group within a cluster.
■
Ensure that the device path to the shared disk group or LUNs is recognized by
all systems sharing the disk.
Configuring shared storage
This topic describes how to configure shared storage.
To configure shared storage
1
In your service group, create the following resources:
■
For SFW HA, create resources of type VMDg and MountV.
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■
For VCS for Windows, create resources of type NetAppFiler and
NetAppSnapDrive.
See “Adding a resource” on page 152.
2
Configure the following required attributes for the respective resources:
VMDg resource
DiskGroupName
The name of the cluster disk group. Retrieve the name by running
the command vxdg list, or by using the VMGetDrive utility.
See “The vmgetdrive utility” on page 589.
MountV resource
■
■
■
NetAppFiler
resource
■
■
NetAppSnapDrive ■
resource
■
■
■
■
■
3
MountPath: The drive letter or path to an empty NTFS folder
that will be assigned to the volume being mounted.
VolumeName: The name of the volume to be mounted. For
example, the name could be Raid1, Stripe2, Volume01, etc.
Use the VMGetDrive utility to retrieve the volume name.
See “The vmgetdrive utility” on page 589.
VMDGResName: The name of the Volume Manager Diskgroup
(VMDg) resource on which the MountV resource depends.
FilerName: DNS-resolvable name or IP address of the locally
attached filer.
StorageIP: The private storage IP address of the filer.
FilerResName: Name of the VCS NetAppFiler-type resource
in the service group.
VolumeName: Name of the volume containing the virtual disk.
Define the volume name in the same case as on the filer.
ShareName: Name of the CIFS share containing the virtual
disk.
LUN: Name of the LUN on the filer that is presented to the host
for mounting. Define the LUN name in the same case as on
the filer.
MountPath: Drive letter to be assigned to the virtual disk.
Initiator: Name of the iSCSI or FC initiator that the host uses
to connect to the virtual disks on the filer. You can retrieve this
from the Disk Management console.
Link the resources as follows:
■
For SFW HA, link MountV and VMDg resources such that the MountV
resource depends on the VMDg resource.
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■
For VCS for Windows, link NetAppSnapDrive and NetAppFiler resources
such that the NetAppSnapDrive resource depends on the NetAppFiler
resource.
See “Linking resources” on page 162.
4
Configure other resources in the service group, if required.
5
Bring the MountV or the NetAppSnapDrive resource online.
Managing storage using VMware virtual disks
Configure the storage disks to save the application data.
VMware virtualization manages the application data by storing it on SAN LUNs
(RDM file), or creating virtual disks on a local or networked storage attached to the
ESX host using iSCSI, network, or Fibre Channel. The virtual disks reside on a
datastore or a raw disk that exists on the storage disks used.
For more information, refer to the VMware documentation.
The application monitoring configuration in a VMware environment requires you to
use the RDM or VMDK disk formats. During a failover, these disks can be deported
from a system and imported to another system.
Consider the following to manage the storage disks:
■
Use a networked storage and create virtual disks on the datastores that are
accessible to all the ESX servers that hosts the VCS cluster systems.
■
In case of virtual disks, create non-shared virtual disks (Thick Provision Lazy
Zeroed).
■
Add the virtual disks to the virtual machine on which you want to start the
configured application.
Note: If your storage configuration involves NetApp filers that are directly connected
to the systems using iSCSI initiator, you cannot configure application monitoring in
a virtual environment with non-shared disks.
The following VCS storage agents are used to monitor the storage components
involving non-shared storage:
Before configuring the storage, you can review the resource types and attribute
definitions of these VCS storage agents. For details refer to the Veritas Cluster
Server Bundled Agents Reference Guide.
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About configuring network resources
About configuring network resources
When you configure your network resources in a VCS cluster, consider the following:
■
For configuring the network components on your systems, use the NIC and IP
agents.
■
If your cluster systems use virtual computer names, use the Lanman agent.
About configuring IP addresses on the systems
Before configuring the network resources, review the resource type and the attribute
definitions of the NIC and IP agents described in the Veritas Cluster Server Bundled
Agents Reference Guide.
Before you configure IP addresses on the systems
Following are the prerequisites to configure IP addresses in the systems:
■
Ensure that the NIC has the correct administrative IP address and subnet mask
(for IPv4 addresses) or prefix length (for IPv6 addresses).
■
If the NICs have built-in failover support, disable it. Refer to the documentation
provided by the NIC vendor.
■
Do not configure IP addresses added from the Control Panel.
■
Verify that the virtual IP address to be assigned is unique and is not in use on
the network.
■
Disable DHCP on the NIC.
Disabling DHCP
This topic describes how to disable DHCP:
To disable DHCP
1
Open the Network Connections Control Panel.
2
Right-click the network connection and click Properties.
3
In the Properties dialog box for the respective local area connection, select the
General tab, if not already selected.
4
Select Internet Protocol (TCP/IP) and click Properties.
5
Verify that the Obtain an IP address automatically option is not selected.
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6
Specify values for IP address, Subnet mask, and Default Gateway, if not
already specified.
7
Click OK and close the Control Panel.
Configuring IP addresses on the systems
This topic describes how to configure IP addresses on the systems.
To configure IP addresses
1
In your service group, create resources of type NIC and IP.
See “Adding a resource” on page 152.
2
Configure the following required attributes for these resources:
NIC Resource
■
MACAddress: The physical address of the NIC to be monitored. You can
retrieve the physical addresses of NICs using the command ipconfig
-all. Note that this attribute is always local.
■
UseConnectionStatus: A flag that defines whether the NIC maintains its
connection status.
IP Resource
■
Address: The unique virtual IP address to be assigned to the NIC.
■
MACAddress: The physical address of the NIC to which the virtual IP
address is assigned. Note that this attribute is always local.
■
SubNetMask: In case of an IPv4, the subnet mask associated with the IPv4
address.
■
Prefix: In case of IPv6, the prefix associated with the IPv6 address.
The prefix is generally represented as:
ipv6-address/prefix-length
For example, 2001:db8:0:1::/64.
■
3
Ensure that the value of the attribute UseConnectionStatus is correct. This
value is set to True by default, and indicates that all NICs maintain their
connection status. If UseConnectionStatus is set to False, ensure that the
NIC has an IP address assigned and that at least one host is listed in the
attribute PingHostList.
Link the IP and NIC resources such that the IP resource depends on the NIC
resource.
See “Linking resources” on page 162.
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4
Configure other resources in the service group, if required.
5
Bring the IP resource online.
About configuring virtual computer names
Before configuring the agent, review the resource type and the attribute definitions
of the Lanman agent described in the Veritas Cluster Server Bundled Agents
Reference Guide.
Before you configure virtual computer names
Following are the prerequisites to configure virtual computer names:
■
Remove static entries mapping the virtual name to the IP address from your
WINS server.
■
If using the agent to bind multiple IP addresses to a virtual computer name,
make sure the IP addresses belong to different subnets.
■
Make sure the VCS Helper domain user account has "Add workstations to
domain" privilege enabled in the Active Directory.
■
DNS scavenging affects virtual servers configured in VCS because the Lanman
agent uses DDNS to map virtual names with IP addresses. If you use scavenging,
then you must set the DNSRefreshInterval attribute for the Lanman agent. This
will enable the Lanman agent to refresh the resource records on the DNS servers.
See the Lanman agent description in the Veritas Cluster Bundled Agents
Reference Guide.
Configuring virtual computer names
This topic describes how to configure virtual computer names:
To configure virtual computer names
1
In your service group, create resources of type NIC and IP.
See “About configuring IP addresses on the systems” on page 252.
2
Create a resource of type Lanman.
3
Configure the following required attributes for the resource:
■
VirtualName: The virtual computer name to be assigned to the server.
■
IPResName: The name of the IP resource (in case of IPv4) or the IPv6
resource (in case of IPv6) on which the Lanman resource depends. The
IPResName attribute is not required if you have the MultiNet attribute set
to 1.
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4
Link the IP and NIC resources such that
■
the IP resource depends on the NIC resource, and
■
the Lanman resource depends on the IP resource.
See “Linking resources” on page 162.
5
Configure other resources in the service group, if required.
6
Bring the Lanman resource and other resources in the service group online.
About configuring file shares
This topic describes how to configure file shares in VCS.
VCS provides several ways to configure file shares, including the configuration
wizard, Cluster Manager (Java Console), and the command line. This section
provides instructions on how to use the File Share Configuration Wizard to configure
file shares.
On Windows Server Core, you have to add the required resources and configure
the service group manually. You can perform the steps either directly on the Server
Core machine using VCS commands from the command line, or remotely using
the Cluster Manager (Java Console).
See “About the Cluster Manager (Java Console)” on page 101.
See “About administering VCS from the command line” on page 182.
If you want to configure file shares manually, consider the following:
■
To configure a shared directory, use the FileShare agent.
■
To configure multiple directories, use the CompositeFileShare agent.
■
If User Access Control (UAC) is enabled on Windows Server systems, you must
launch the command prompt in the Run as administrator mode and then run
the VCS commands.
■
Before configuring the service group, review the agent resource types and the
attribute definitions described in the Veritas Cluster Server Bundled Agents
Reference Guide.
Before you configure a file share service group
Note the following prerequisites before you configure a file share service group:
■
Verify that you have local administrator privileges on the system from where
you run the wizard.
■
If you have configured a firewall, add the following to the firewall exceptions list:
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■
Port 14150 or the VCS Command Server service:
%vcs_home%\bin\CmdServer.exe.
Here, %vcs_home% is the installation directory for VCS, typically: C:\Program
Files\Veritas\Cluster Server.
■
Port 14141
For a detailed list of services and ports used, refer to the product installation
and upgrade guide.
■
Verify that the VCS high availability engine, HAD, is running on the system from
which you run the wizard.
■
Verify that the directories to be shared reside on shared disks that are accessible
from the nodes that will be part of the file share service group.
■
If your storage is SCSI-3 compliant and you wish to use SCSI-3 persistent
reservations, enable SCSI-3 support using Veritas Enterprise Administrator
(VEA). VEA is available with SFW HA only.
■
Mount the drives or LUNs containing the shared directories on the system where
you run the wizard. Unmount the drives or LUNs from other systems in the
cluster.
See “About managing storage using Windows Logical Disk Manager” on page 241.
See “About managing storage in a Network Appliance storage environment”
on page 246.
See “About managing shared storage using Storage Foundation for Windows”
on page 248.
■
Verify that the Veritas Command Server service is running on all the systems
in the cluster.
■
If NetBIOS is disabled over TCP/IP, you must set the Lanman agent's
DNSUpdateRequired attribute value to 1 (True).
You can modify the Lanman resource attribute value after configuring the service
group.
■
Verify that you have the following information ready. The wizard prompts you
for these details:
■
A unique virtual computer name to be assigned to the file share server
This is the name that the clients use to access the file shares. The virtual
name must not exceed 15 characters. If you specify a virtual computer name
in lowercase letters, the name is converted to uppercase. For example, the
name VCSServer is converted to VCSSERVER.
■
A unique virtual IP address to be assigned to the file share server
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The virtual IP address is required only if you wish to configure an IPv4
address. In case of IPv6, the wizard prompts you to select the IPv6 network
and automatically generates an IPv6 address that is valid and unique on the
network. The wizard uses the prefix that is advertised by the router on the
IPv6 network.
Note: Windows Server does not support accessing file shares using a virtual
IP address. You can work around this restriction by using non-scoped file
shares.
See “Creating non-scoped file shares configured with VCS” on page 268.
See “Making non-scoped file shares accessible while using virtual server
name or IP address if NetBIOS and WINS are disabled” on page 269.
■
The list of directories to be shared.
You can add existing shares to the VCS configuration. However, you cannot
add special shares (shares created by the operating system for administrative
and system use). For example, you cannot add the shares ADMIN$, print$,
IPC$, and DriveLetter$ to the VCS configuration.
Configuring file shares using the wizard
The File Share Configuration Wizard enables you to create and modify file share
service groups, making file shares highly available in a VCS cluster.
To configure file shares using the File Share Configuration Wizard
1
Start the File Share Configuration Wizard.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > File Share Configuration Wizard.
2
Review the information in the Welcome panel and click Next.
3
On the Wizard Options panel, click Create service group and then click Next.
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4
On the Service Group Configuration panel, specify the following service group
details:
Service Group
Name
Type a name for the file share service group.
Group System List Specify the systems on which to configure the service group.
To add systems to the service group's system list, select the
systems in the Available Cluster Systems list and click the right
arrow.
To remove systems from the service group's system list, select
the systems in the Systems in Priority Order list and click the
left arrow.
To change a system's priority in the service group's system list,
select the system in the Systems in Priority Order and click the
up or down arrow.
System priority defines the order in which service groups are failed
over to systems. The system at the top of the list has the highest
priority, while the system at the bottom of the list has the lowest
priority.
Include selected
systems in the
service group's
AutoStartList
attribute
To enable the service group to automatically come online on one
of the systems, select this checkbox.
Click Next.
5
On the FileShare Configuration panel, specify the following configuration
information for the file share resources to be created.
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Virtual Computer
Name
Type a unique virtual computer name to be assigned to the file
share server. This is the name that the clients use to access the
file shares.The virtual name must not exceed 15 characters.
List Shares
Click List Shares to view the existing shares on the shared
storage, then select a share and click Add.
You cannot add special shares (shares created by the operating
system for administrative and system use).
Path
Click the field and either type the path of the directory to be shared
or click the ellipsis button (...) to browse for a directory. The
selected directories must meet the following conditions:
■
■
The selected drive, the mount path, and the file path must not
exist in the VCS configuration.
The directories to be shared must reside on shared, non-system
drives.
The wizard validates the selected directory and displays an error
message if the directory does not meet any of the conditions.
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Share Name
If a selected directory is already shared, the Share Name column
lists the names by which it is shared. You can select a listed share
name to make an existing share highly available. You can also
create a new share for the same directory by typing a new share
name.
Remove
To remove a file share from the configuration, click to select the
file share, and then click Remove.
Configure NetApp
SnapMirror
Resource(s)
This is applicable in case of VCS for Windows only.
Check the Configure NetApp SnapMirror Resource(s) check
box if you wish to set up a disaster recovery configuration.
The SnapMirror resource is used to monitor replication between
filers at the primary and the secondary site, in a disaster recovery
configuration.
Note that you must configure the SnapMirror resource only after
you have configured the cluster at the secondary site.
Click Next.
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6
On the Share Permissions panel, specify the users for the file shares and
assign permissions to them as follows:
Select the
FileShare
From the drop-down list, select the file share with which to
associate user permissions, or select the default All FileShares
to set the same permissions for all file shares.
Select the
Permission
From the drop-down list, select the permission to be associated
with the user.
Select the User
Click the ellipsis button (...), select a user, and click OK.
Add
Click to add the specified user to the Selected Users list. By
default, all selected users are given the READ_ACCESS
permission.
Selected Users
Displays a list of selected users and the file share permissions.
You can configure a maximum of 50 users for each file share. To
configure more users, create a user group.
To change the file share permission associated with a user, click
a user name in the Selected Users list and then select the desired
permission from the Select the Permission drop-down list.
Remove
To deny file share access to a user, click the user name in the
Selected Users list and click Remove.
Click Next.
7
On the Share Properties panel, set the share properties for the file shares as
follows:
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Select the FileShare From the drop-down list, select a file share whose properties you
wish to set.
Enable
Check the Enable access-based enumeration check box to
access-based
enable the Windows access-based enumeration feature on the
enumeration for this selected file share.
file share
User Limit
Specify the number of users that are allowed access to the
selected file share.
Choose from the following options:
■
■
Maximum allowed users: Select this option to allow access
to the maximum numbers of users allowed on Windows.
Allow this number of users: Select this option and then type
the number of users that you wish to grant access to the
selected file share.
If you type zero or a value greater than what Windows
supports, access is granted to the maximum users allowed
on Windows.
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Enable cache
Check the Enable cache check box to enable local caching of
the contents of the selected file share. Then, specify how the
contents of the file share are available to users for offline access.
In the drop-down list select from the following caching options:
■
■
■
Manual caching of files and programs: Only the files and
programs specified by the user are available offline. This sets
the FileShare resource attribute ClientCacheType to MANUAL.
Automatic caching of programs: All the files and programs
that the users access from the file share are available offline.
This sets the FileShare resource attribute ClientCacheType
to DOCS.
Optimized automatic caching of files and programs: All
the files and programs, including executables, are cached
locally. The next time the user accesses the executable files,
they are launched from the local cache. This sets the FileShare
resource attribute ClientCacheType to PROGRAMS.
Hide share
Check the Hide Share check box to make the new share a hidden
share.
Share all subfolder
Check the Share all subfolders check box to share the
subdirectories.
Hide child shares
Check the Hide child shares check box to hide the shared
subdirectories.
Apply these settings To apply the specified share properties to multiple file shares
to
simultaneously, do the following:
1
Click the ellipsis button (...).
2
On the Copy Share Properties dialog box, select the file
shares from the Available Shares list and click the right arrow
to move them to the Selected Shares list.
Note that only those files shares that are not already shared
are available for selection.
3
Click OK.
Note: This option is not visible if you are configuring only one
share in the service group.
Clikc Next.
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8
This is applicable in case of VCS for Windows only.
On the Initiator Selection panel, select the initiator for the virtual disk from the
list of available initiators displayed for each cluster node, and then click Next.
If you are configuring multipath I/O (MPIO) over Fibre Channel (FC), you must
select at least two FC initiators for each cluster node. Note that the node from
which you run this wizard already has an initiator selected by default. This is
the initiator that was specified when you connected the LUNs to this cluster
node.
9
On the Network Configuration panel, specify information related to your network
as follows:
■
■
Select IPv4 to configure an IPv4 address for the virtual server.
■
In the Virtual IP Address field, type a unique virtual IPv4 address for
the virtual server.
■
In the Subnet Mask field, type the subnet to which the virtual IPv4
address belongs.
Select IPv6 to configure an IPv6 address for the virtual server. The IPv6
option is disabled if the network does not support IPv6.
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■
Select the prefix from the drop-down list. The wizard uses the prefix and
automatically generates an IPv6 address that is valid and unique on the
network.
■
For each system in the cluster, select the public network adapter name.
This field displays the TCP/IP enabled adapters on a system, including the
private network adapters, if applicable. To view the adapters associated
with a system, click the Adapter Display Name field and click the arrow.
Verify that you select the adapters assigned to the public network, not the
private.
■
Click Advanced Settings to specify additional details for the Lanman
resource.
On the Lanman Advanced Configuration dialog box, do the following:
■
Check Active Directory Update required check box to enable the
Lanman resource to update the Active Directory with the virtual name.
This sets the Lanman agent attributes ADUpdateRequired and
ADCriticalForOnline to true.
■
In the Organizational Unit field, type the distinguished name of the
Organizational Unit for the virtual server in the format
CN=containername,DC=domainname,DC=com.
To browse for an Organizational Unit, click the ellipsis button (...) and
search using the Windows Find Organization Units dialog box.
By default, the Lanman resource adds the virtual server to the default
container "Computers."
■
Click OK.
The user account for VCS Helper service must have adequate privileges
on the specified container to create and update computer accounts.
Click Next.
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10 On the Summary panel, review the service group configuration; the following
details are displayed:
Resources
Displays a list of configured resources. The wizard assigns unique
names to resources. Change the names of resource, if required.
To edit a resource name, select the resource name and either
click it or press the F2 key. Edit the resource name and then press
the Enter key to confirm the changes. To cancel editing a resource
name, press the Esc key.
Attributes
Displays the attributes and their configured values, for a resource
selected in the Resources list.
Click Next.
11 Click Yes on the dialog box that appears, informing you that the wizard will run
commands to modify the service group configuration.
12 On the completion panel, check Bring the service group online check box
if you want to bring the service group online on the local system, and then click
Finish.
Modifying a file share service group using the wizard
The File Share Configuration Wizard enables you to modify a file share service
group.
Consider the following before you modify file share service groups using the wizard:
■
If the file share service group is online, you must run the wizard from a node on
which the service group is online. You can then use the wizard to add resources
to and remove them from the configuration. You cannot change attributes of
resources that are online.
■
To change the resource attributes, you must take the service group offline.
However, the MountV and VMDg (in case of SFW HA), Mount and DiskRes (in
case of Windows LDM), and NetAppSnapDrive and NetAppFiler (in case of VCS
for Windows) resources for the service group should be online on the node
where you run the wizard and offline on all other nodes.
■
If you are running the wizard to remove a node from the service group's system
list, do not run the wizard on the node being removed.
■
If the service group contains resources that were not part of the default service
group configuration, then modifying the service group may change those
resources. You may then have to manually restore the settings of those resources
later.
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■
After configuring a file share if you move the shared directory to a new location,
then while reconfiguring the file share service group, the wizard fails to delete
the storage resources configured for the existing file share.
The wizard successfully creates a new file share resource and the corresponding
storage resources, but fails to remove the older storage resources from the
service group.
In such cases, you can either remove the stale storage resources manually, or
delete the file share service group and run the wizard again to recreate the
service group.
To modify a file share service group using the wizard
1
Start the File Share Configuration Wizard on a node on which the file share
service group is online.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > File Share Configuration Wizard.
2
Review the information on the Welcome panel and click Next.
3
On the Wizard Options panel, click Modify service group, select the service
group to be modified, and click Next.
4
Follow the wizard instructions and make desired modifications to the service
group configuration.
See “About configuring file shares” on page 255.
Deleting a file share service group using the wizard
This topic describes steps to delete a file share service group using the wizard.
To delete a file share service group using the wizard
1
Start the File Share Configuration Wizard on a system configured to host the
file share service group.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > File Share Configuration Wizard.
2
Review the information in the Welcome panel and click Next.
3
On the Wizard Options panel, click Delete service group, select the service
group to be deleted, and click Next.
4
On the Service Group Summary panel, click Next. A message appears
informing you that the wizard will run commands to delete the service group.
Click Yes to delete the service group.
5
Click Finish.
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Creating non-scoped file shares configured with VCS
File shares configured with VCS on Windows Server are accessible only using the
virtual server name (Lanman resource). These file shares are not accessible using
the IP address.
The FileShare agent is enhanced to address this issue. The FileShare agent
behavior can be controlled using the following registry key:
HKLM\SOFTWARE\VERITAS\VCS\BundledAgents\
Lanman\virtualName\DisableServerNameScoping
Set the DisableServerNameScoping key to have the FileShare agent support
non-scoped file shares.
You must create this registry key manually.
Note: Incorrectly editing the registry may severely damage your system. Back up
the registry before making changes.
To configure the DisableServerNameScoping registry key
1
To open the Registry Editor, click Start > Run, type regedit, and then click
OK.
2
In the registry tree (on the left), navigate to the following location:
HKLM\SOFTWARE\VERITAS\VCS\BundledAgents
3
Click Edit > New > Key and create a key by the name Lanman, if it does not
exist already.
4
Select the Lanman key and click Edit > New > Key and create a key by the
name <virtualName.
Here, virtualName should be the virtual computer name assigned to the file
share server. This is the VirtualName attribute of the Lanman resource in the
file share service group.
The newly created registry key should look like this:
HKLM\SOFTWARE\VERITAS\VCS\BundledAgents\
Lanman\virtualName
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5
Select the key that you created in step 4 (virtualName) and add a DWORD
type of value.
The value name should be DisableServerNameScoping and value data should
be 1.
The value 1 indicates that the FileShare and Lanman agents support
non-scoped file shares on Windows Server systems.
6
If there are multiple file share service groups to be used in the non-scoped
mode, repeat steps 4 and 5 for each Lanman resource that is configured in
the file share service group.
7
Save and exit the Registry Editor.
You must create this key only for Lanman resources that are part of VCS file share
service groups. Configuring this key for Lanman resources that are part of other
VCS service groups may result in unexpected behavior.
Making non-scoped file shares accessible while using virtual server
name or IP address if NetBIOS and WINS are disabled
The VCS FileShare agent depends on NetBIOS or DNS to resolve the virtual name.
If NetBIOS and WINS are disabled or the DNS is not updated, the agent is unable
to resolve the virtual name.
This may typically occur when the file share service groups are configured to use
localized IP addresses. When the service group is switched or failed over, the virtual
name to IP address mapping changes. In such a case if WINS database or the
DNS are not updated, the agent is unable to resolve the virtual name. As a result
the FileShare resources fault and the shares become inaccessible.
The following message appears in the agent log:
VCS INFO V-16-10051-10530 FileShare:servicegroupname:online:
Failed to access the network path (\\virtualName)
The FileShare agent is enhanced to address this issue. The FileShare agent
behavior can be controlled using the following registry key:
HKLM\SOFTWARE\VERITAS\VCS\BundledAgents\
\Lanman\virtualName\DisableStrictVirtualNameCheck
Set the DisableStrictVirtualNameCheck key to have the FileShare agent make the
file shares accessible irrespective of whether or not the virtual name is resolvable.
In case the virtual name is not resolvable, the file shares are accessible using the
virtual IP.
You must create this registry key manually.
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Note: Incorrectly editing the registry may severely damage your system. Back up
the registry before making changes.
To configure the DisableStrictVirtualNameCheck registry key
1
To open the Registry Editor, click Start > Run, type regedit, and then click
OK.
2
In the registry tree (on the left), navigate to the following location:
HKLM\SOFTWARE\VERITAS\VCS\BundledAgents
3
Click Edit > New > Key and create a key by the name Lanman, if it does not
exist already.
4
Select the Lanman key and click Edit > New > Key and create a key by the
name virtualName.
Here, virtualName should be the virtual computer name assigned to the file
share server. This is the VirtualName attribute of the Lanman resource in the
file share service group.
The newly created registry key should look like this:
HKLM\SOFTWARE\VERITAS\VCS\BundledAgents\
Lanman\virtualName
5
Select the key that you created in step 4 (virtualName) and add a DWORD
type of value.
The value name should be DisableStrictVirtualNameCheck and value data
should be 1.
6
If there are multiple file share service groups to be used in the non-scoped
mode, repeat steps 4 and 5 for each Lanman resource that is configured in
the file share service group.
7
Save and exit the Registry Editor.
You must create this key only for Lanman resources that are part of VCS file share
service groups. Configuring this key for Lanman resources that are part of other
VCS service groups may result in unexpected behavior.
About configuring file shares with multiple subdirectories
Use the VCS CompositeFileShare agent to configure file shares with multiple
subdirectories.
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About configuring file shares
Before configuring a file share service group, review the resource types and the
attribute definitions of the Composite FileShare agent, described in the Veritas
Cluster Server Bundled Agents Reference Guide.
Before you configure multiple file shares
Note the following prerequisites before configuring file share using the
CompositeFileShare agent:
■
Verify that the directories to be shared are on shared disks or LUNs.
■
Do not use local system accounts for share users. Use domain-level accounts
and users only.
Note: Sharing a directory with a large number of subdirectories and enabling the
ShareSubdirectories flag could cause increased failover time and high CPU and
memory utilization.
Configuring multiple file shares
This topic describes how to configure multiple file shares:
To configure multiple files shares
1
Configure your shared storage.
See “About storage configuration” on page 240.
2
Configure the NIC and IP resources.
See “About configuring IP addresses on the systems” on page 252.
3
Create a resource of type CompositeFileShare.
See “Adding a resource” on page 152.
4
Configure the following required attributes for the CompositeFileShare resource:
■
MountResName: The name of the MountV resource on which the
CompositeFileShare resource depends.
■
PathAndShareName: A list specifying the respective paths and share names
of the directories to be shared. If the path of a shared directory is
\Documents, and the share name is UserDocs, the attribute is defined in
the configuration file as PathandShareName is {"\\Documents" =
"UserDocs"}.
To create a hidden share, set the HiddenShare attribute to 1. Do not append
the share name with a $ (dollar) sign.
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For more information on other CompositeFileShare agent attributes, refer to
the Veritas Cluster Server Bundled Agents Reference Guide.
5
Configure a Lanman resource. Do not create other resources on which the
Lanman agent depends.
See “About configuring virtual computer names” on page 254.
6
Link resources to create the following dependencies:
■
CompositeFileShare resource depends on the MountV (in case of SFW
HA), Mount (in case of Windows LDM), or NetAppSnapDrive (in case of
VCS for Windows) resource.
■
CompositeFileShare resources depends on the Lanman resource.
■
Lanman resource depends on IP or IPv6 resource, and the IP or IPv6
resource in turn depends on the NIC resource.
See “Linking resources” on page 162.
7
Configure other resources in the service group, if required.
8
Bring the Lanman resource, and other resources in the service group, online.
About configuring print shares
This topic provides an overview of the steps involved in configuring a print share
service group in a VCS cluster. A print share service group enables clients to share
a network printer from a cluster.
VCS provides several ways to configure a print share service group, including the
configuration wizard, Cluster Manager (Java Console), and the command line. This
section provides instructions on how to use the Print Share Configuration Wizard
to configure print shares.
On Windows Server Core, you have to add the required resources and configure
the service group manually. You can perform the steps either directly on the Server
Core machine using the command line, or remotely using the Cluster Manager
(Java Console).
See “About the Cluster Manager (Java Console)” on page 101.
See “About administering VCS from the command line” on page 182.
If User Access Control (UAC) is enabled on Windows Server systems, you must
launch the command prompt in the Run as administrator mode and then run the
VCS commands.
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About configuring print shares
Before configuring a print share service group, review the resource types and
attribute definitions of the PrintShare agents described in the Veritas Cluster Server
Bundled Agents Reference Guide.
Before you configure a print share service group
Note the following prerequisites before you configure a print share service group:
■
Verify that you have local administrator privileges on the node from where you
run the wizard.
■
If you have configured a firewall, add the following to the firewall exceptions list:
■
Port 14150 or the VCS Command Server service:
%vcs_home%\bin\CmdServer.exe
Here, %vcs_home% is the installation directory for VCS, typically: C:\Program
Files\Veritas\Cluster Server.
■
Port 14141
For a detailed list of services and ports used, refer to the product installation
and upgrade guide.
■
Verify that the VCS high availability engine, HAD, is running on the node from
which you run the wizard.
■
Verify that VCS Command Server service is running on all systems in the cluster.
■
Verify that the network printer has an IP address assigned.
■
Symantec recommends creating the spooler and the replication directories on
different disk partitions, volumes, or LUNs.
■
Mount the drives or LUNs with the spooler and the replication directories on the
node on which you run the wizard. Unmount the drives or LUNs from other
nodes in the cluster.
See “About managing storage using Windows Logical Disk Manager” on page 241.
See “About managing storage in a Network Appliance storage environment”
on page 246.
See “About managing shared storage using Storage Foundation for Windows”
on page 248.
■
If your storage is SCSI-3 compliant and you wish to use SCSI-3 persistent
reservations, enable SCSI-3 support using Veritas Enterprise Administrator
(VEA). VEA is available with SFW HA only.
■
If NetBIOS is disabled over TCP/IP, you must set the Lanman agent's
DNSUpdateRequired attribute value to 1 (True).
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You can modify the Lanman resource attribute value after configuring the service
group.
■
Verify that you have the following information ready. The wizard prompts you
for these details:
■
A unique virtual computer name to be assigned to the print share server
This is the name by which clients access the server. The virtual name must
not exceed 15 characters. If you specify a virtual computer name in lowercase
letters, the name is converted to uppercase. For example, the name
VCSServer is converted to VCSSERVER.
■
A unique virtual IP address to be assigned to the print share server
The virtual IP address is required only if you wish to configure an IPv4
address. In case of IPv6, the wizard prompts you to select the IPv6 network
and automatically generates an IPv6 address that is valid and unique on the
network. The wizard uses the prefix that is advertised by the router on the
IPv6 network.
■
The IP address of the network printer
Configuring a print share service group using the wizard
The Print Share Configuration wizard enables you to create and modify a print share
service group in a VCS cluster. This section describes how to create a print share
service group using the wizard.
You can also modify an existing print share service group using the wizard.
See “Modifying a print share service group using the wizard” on page 281.
Configuring a print share service group involves the following tasks:
■
Creating a service group with a PrintSpool resource and bringing it online. This
also involves configuring the Lanman resource on which the PrintSpool resource
depends.
■
Adding a network printer to the virtual computer created by the Lanman resource,
and creating a new TCP/IP port for the printer.
■
Configuring a PrintShare resource in the service group and bringing it online.
These tasks are described in the procedures that follow.
To configure a print share service group with a PrintSpool resource
1
Start the Print Share Configuration Wizard.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > Print Share Configuration Wizard.
2
Review the information on the Welcome panel and click Next.
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3
On the Wizard Options panel, click Create service group and click Next.
4
On the Service Group Configuration panel, specify the service group details
and click Next.
Specify the following details:
Service Group
Name
Type a name for the print share service group.
Available Cluster
Systems
Select the systems on which to configure the service group and
click the right arrow to move the systems to the service group's
system list.
To remove a system from the service group's system list, click the
system in the Systems in Priority Order box and click the left arrow.
To change a system's priority in the service group's system list,
click the system from the Systems in Priority Order and click the
up and down arrows.
System priority defines the order in which service groups are failed
over to systems. The system at the top of the list has the highest
priority while the system at the bottom of the list has the lowest
priority.
Include selected
systems in the
service group's
AutoStartList
attribute
5
To enable the service group to automatically come online on one
of the systems, select this checkbox.
On the Virtual Server Configuration panel, specify information related to your
network and then click Next.
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Do the following:
■
Select IPv4 to configure an IPv4 address for the virtual server.
■
In the Virtual IP Address field, type a unique virtual IPv4 address for the
virtual server.
■
In the Subnet Mask field, type the subnet to which the virtual IPv4
address belongs.
■
Select IPv6 to configure an IPv6 address for the virtual server. The IPv6
option is disabled if the network does not support IPv6.
Select a value from the Prefix from the drop-down list. The wizard uses
this prefix and automatically generates an IPv6 address that is valid and
unique on the network.
■
In the Virtual Server Name field, type a unique virtual computer name by
which the print share server will be known to clients. Note that the virtual
name must not exceed 15 characters.
■
For each system in the cluster, select the public network adapter name.
This field displays the TCP/IP enabled adapters on a system, including the
private network adapters, if applicable. To view the adapters associated
with a system, click the Adapter Display Name field and click the arrow.
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Verify that you select the adapters assigned to the public network, not the
private.
■
Click Advanced Settings to specify additional details for the Lanman
resource.
On the Lanman Advanced Configuration dialog box, do the following:
■
Check Active Directory Update required check box to enable the
Lanman resource to update the Active Directory with the virtual name.
This sets the Lanman agent attributes ADUpdateRequired and
ADCriticalForOnline to true.
■
In the Organizational Unit field, type the distinguished name of the
Organizational Unit for the virtual server in the format
CN=containername,DC=domainname,DC=com.
To browse for an OU, click ... (ellipsis button) and search for the OU
using the Windows Find Organization Units dialog box.
By default, the Lanman resource adds the virtual server to the default
container "Computers."
■
6
Click OK.
The user account for VCS Helper service must have adequate privileges
on the specified container to create and update computer accounts.
On the Configure Data Path panel, specify the directories for spool and registry
replication, specify the other options on this panel, and then click Next.
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Specify the following details:
Spooler Directory
Type the path or click ... (ellipsis button) to browse for the directory.
All print commands are spooled at this location.
Replication
Directory
Type the path or click ... (ellipsis button) to browse for the directory.
All changes related to the printer registry keys are logged at this
location.
The selected directories must fulfill the following conditions:
■
■
The selected drive, the mount path, and the file path must not
exist in the VCS configuration.
The directories to be shared must reside on shared, non-system
drives.
Symantec recommends creating the directories for replication and
spooling on different mounts.
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Configure NetApp
SnapMirror
Resource(s)
This is applicable in case of VCS for Windows only.
Check the Configure NetApp SnapMirror Resource(s) check
box if you wish to set up a disaster recovery configuration. The
SnapMirror resource is used to monitor replication between filers
at the primary and the secondary site, in a disaster recovery
configuration.
Note that you must configure the SnapMirror resource only after
you have configured the cluster at the secondary site.
7
This step is applicable in case of VCS for Windows only.
On the Initiator Selection panel, select the initiator for the virtual disk from the
list of available initiators displayed for each cluster node, and then click Next.
If you are configuring multipath I/O (MPIO) over Fibre Channel (FC), you must
select at least two FC initiators for each cluster node. Note that the node from
which you run this wizard already has an initiator selected by default. This is
the initiator that was specified when you connected the LUNs to this cluster
node.
8
On the Build Print Server panel, review the configuration and click Next.
The following service group details are visible:
Resources
Displays a list of configured resources. The wizard assigns unique
names to resources. Change the names of resource, if required.
To edit a resource name, select the resource name and either
click it or press the F2 key. Edit the resource name and then press
the Enter key to confirm the changes. To cancel editing a resource
name, press the Esc key.
Attributes
9
Displays the attributes and their configured values, for a resource
selected in the Resources list.
Click Yes on the dialog that prompts you that the wizard will run commands to
modify the service group configuration.
10 Bring the PrintSpool resource online.
Proceed to the next steps to add the network printer to the virtual computer created
by the Lanman resource and to create a new TCP/IP port for the printer.
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About configuring print shares
To add the network printer to the virtual computer
1
Launch the Add Printer wizard to add the network printer to the virtual computer.
Before starting the Add Printer wizard, verify that the PrintSpool and Lanman
resources are online in the cluster.
To launch the Add Printer wizard, return to the Print Share Configuration Wizard,
and click Add Printer on the Add Printer panel.
Alternatively, in Windows Explorer, search for the virtual computer, explore the
virtual computer by double-clicking its name and on the virtual computer's
Printers folder, and double-click Add Printer.
2
In the Add Printer wizard, review the information on the Welcome panel and
click Next.
3
Follow the wizard instructions to add the network printer to the virtual computer.
In the Printer Sharing dialog box, always choose the Do not share this printer
option.
Repeat these steps for each additional printer to be installed.
4
Return to the Print Share Configuration Wizard and proceed to the next step
to configure a PrintShare resource in your service group and bring it online.
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About configuring print shares
To configure a PrintShare resource for the service group
1
On the Add Printer panel, click Next.
2
On the Printer List panel, specify the printers to be included in the print share
service group and then click Next.
Specify the following details:
Printer List
Click to select the printer, and then click the right arrow to include
the selected printers in your service group.
To remove a selected printer from your service group, click the
printer from the Printer Name list and click the left arrow.
Share Name
3
Type a unique share name for the printer by which it will be known
to clients. If you previously chose to share the printer, VCS uses
the printer's share name.
On the Service Group Summary panel, review the service group configuration
and then click Next.
The following service group details are visible:
Resources
Displays a list of configured resources. The wizard assigns unique
names to resources. Change the names of resource, if required.
To edit a resource name, select the resource name and either
click it or press the F2 key. Edit the resource name and then press
the Enter key to confirm the changes. To cancel editing a resource
name, press the Esc key.
Attributes
4
Displays the attributes and their configured values, for a resource
selected in the Resources list.
In the completion dialog box, check Bring the service group online check
box if you want to bring the service group online on the local system, and then
click Finish.
Modifying a print share service group using the wizard
The Print Share Configuration Wizard enables you to modify a print share service
group.
Consider the following before you modify print share service groups using the
wizard:
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About configuring print shares
■
If the print share service group is online, you must run the wizard from a node
on which the service group is online. You can then use the wizard to add
resources to and remove them from the configuration.
■
You cannot change attributes of resources that are online. To change the
resource attributes, you must take the service group offline.
However, the following resources of the service group should be online on the
node where you run the wizard and offline on all other nodes:
■
In case of SFW HA, the MountV and VMDg resources
■
In case of Windows LDM, the Mount and DiskRes resources
■
In case of VCS for Windows, the NetAppSnapDrive and NetAppFiler
resources
■
If you are running the wizard to remove a node from the service group's system
list, do not run the wizard on the node being removed.
■
If the service group contains resources that were not part of the default service
group configuration, modifying the service group may change those resources.
You may have to manually restore the settings of those resources later.
To modify the print share service group using the wizard
1
Start the Print Share Configuration Wizard on a node on which the print share
service group is online.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > Print Share Configuration Wizard.
2
Read the information on the Welcome panel and click Next.
3
On the Wizard Options panel, click Modify service group, select the service
group to be modified, and click Next.
4
Follow the wizard instructions and make desired modifications to the service
group configuration.
See “Configuring a print share service group using the wizard” on page 274.
If you are modifying the service group to remove a PrintShare resource, make
sure you take the resource offline before deleting it.
Migrating existing printers to a VCS cluster configuration
The following procedure describes how you can bring the existing printers set up
on standalone non-clustered servers, under VCS control. This involves exporting
the printer details from the system outside the VCS cluster and then importing those
settings on a VCS cluster node that hosts a print share service group.
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About configuring print shares
For more details on Print Management, refer to the Microsoft documentation.
Perform the following steps on the standalone system that hosts the existing
printers:
1
Click Start > All Programs > Administrative Tools > Print Management.
2
From the Print Management tree, under Print Servers, right-click the printer
server that contains the printers that you wish to migrate and then select Export
printers to a file.
This launches the Printer Migration wizard.
3
Review the list of printers to be exported and click Next.
4
Specify the location and name for the printer settings file and then click Next.
For example, you can specify the file path and name as
C:\Temp\printers.export.
The wizard stores all the printer data in the specified file.
5
Click Finish when the wizard indicates that the export process is complete.
Perform the following steps on a cluster node that hosts a print share service group:
1
Copy the printer settings file that you created earlier on the standalone system
to this cluster node.
2
Click Start > All Programs > Administrative Tools > Print Management.
3
From the Print Management tree, under Print Servers, expand the virtual printer
server name and right-click Ports and then click Add Port to add the necessary
printer ports.
The ports must be the ports used by the printers on the standalone system.
Note that the virtual printer server is the virtual server name (Lanman) that you
specified while configuring the print share service group.
4
After creating the required printer ports, from the Print Management tree, under
Print Servers, right-click the virtual printer server name and select Import
printers from a file.
This launches the Printer Migration wizard.
5
Specify the printer settings file that you copied earlier and then click Next.
6
Review the list of printers to be exported and click Next.
7
Choose the desired import options and then click Next.
8
Click Finish after the wizard indicates that the import process is complete.
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About configuring IIS sites
9
Launch the VCS Print Share Configuration Wizard.
Click Start > Run and type pswizard and then click OK.
10 Click Next on the Welcome page and then on the Wizard Options page select
Modify service group, choose the print share service group and then click
Next.
11 Click Next on the subsequent pages and on the wizard’s Select Printers panel,
choose the printers that you wish to add to the service group.
This Printer List displays all the printers that were newly added to the node.
12 Complete the remaining wizard steps and bring the service group online.
Deleting a print share service group using the wizard
This topic describes steps to delete a print share service group using the
configuration wizard.
To delete the print share service group using the wizard
1
Start the Print Share Configuration Wizard on a system configured to host the
print share service group.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > Print Share Configuration Wizard.
2
Review the information in the Welcome panel and click Next.
3
In the Wizard Options panel, click Delete service group, select the service
group to be deleted, and click Next.
4
In the Service Group Summary panel, click Next.
5
When the message appears that informs you that the wizard will run commands
to delete the service group, click Yes.
6
Click Finish.
About configuring IIS sites
When configuring the IIS agent to monitor a Web site, you can monitor associated
application pools in the following ways:
■
Configure a resource to monitor the Web site and define options to monitor
associated application pools within the same resource.
■
Configure a resource to monitor the IIS site only. Configure additional resources
to monitor specific application pools.
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About configuring IIS sites
VCS provides several ways to configure the agent, including the configuration
wizard, Cluster Manager (Java console), and the command line. This section
provides instructions on how to use the wizard to configure sites.
To configure IIS agent on Windows Server Core, you must first install IIS 7.0 in the
specified order and then manually add the required resources and configure the
service group.
See “About configuring IIS sites” on page 284.
You can perform the manual configuration steps either directly on the Server Core
machine using VCS commands from the command line, or remotely using the
Cluster Manager (Java console).
See “About the Cluster Manager (Java Console)” on page 101.
See “About administering VCS from the command line” on page 182.
If User Access Control (UAC) is enabled on Windows Server systems, you must
launch the command prompt in the Run as administrator mode and then run the
VCS commands.
Before configuring the agent, review the agent’s resource type definition and attribute
descriptions in the Veritas Cluster Server Bundled Agents Reference Guide. Also,
review the sample configurations and resource dependency graphs.
Before you configure an IIS service group
Note the following prerequisites before you configure an IIS service group:
■
Verify IIS is installed and configured identically on all nodes hosting the service
group. Verify that the sites to be monitored are on shared storage.
■
For IIS 7.0 on Windows Server 2008 and Windows Server 2008 R2, you must
install the following role services:
■
IIS 6 Metabase Compatibility
IIS 6 WMI Compatibility or the IIS Management Scripts and Tools
Only one of these role services is required.
These options are available under Management Tools on the Role Services
page of the Add Roles Wizard.
If IIS 6 Metabase Compatability role is installed, the WMI 6 Provider is used. If
IIS Management Scripts and Tools role is installed, the WMI 7 Provider is used.
If both the roles are installed, the WMI 7 Provider is used.
These components are required for the IIS agent to function on Windows Server
2008.
For IIS 7.0 on Windows Server Core, you must install IIS in the specified order.
See “About configuring IIS sites” on page 284.
■
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■
If IIS configuration is using IPv6 addresses, then you must install the IIS
Management Scripts and Tools role service.
IPv6 requires WMI 7 Provider that is part of the IIS Management Scripts and
Tools role.
■
If you are configuring FTP sites that use IPv6 addresses, ensure that the IPv6
address entry (IP Address column in Site Bindings dialog) is enclosed in square
brackets. The VCS IIS Configuration Wizard requires this format to correctly
configure the FTP site in the cluster.
See “Fixing the IPv6 address configuration for FTP sites” on page 287.
■
Do not use the IIS agent to configure SMTP and NNTP sites if you have Microsoft
Exchange installed.
■
Change the default home directory path for all IIS sites to monitored to a location
on the shared storage. See the IIS documentation for instructions.
■
Verify that the port numbers assigned to IIS sites are not used by other programs.
■
Synchronize the IIS configuration on all nodes hosting the service group.
See “About configuring IIS sites” on page 284.
■
Verify that you have local administrator privileges on the system from where
you run the wizard.
■
If you have configured a firewall, add the following to the firewall exceptions list:
■
Port 14150 or the VCS Command Server service:
%vcs_home%\bin\CmdServer.exe
Here, %vcs_home% is the installation directory for VCS, typically: C:\Program
Files\Veritas\Cluster Server.
■
Port 14141
For a detailed list of services and ports used refer to the product installation and
upgrade guide.
■
Verify that the VCS engine, HAD, is running on the node from which you run
the wizard.
■
Mount the drives or LUNs containing the shared directories on the node from
which you run the wizard. Unmount the drives or LUNs from other nodes in the
cluster.
See “About managing storage using Windows Logical Disk Manager” on page 241.
See “About managing storage in a Network Appliance storage environment”
on page 246.
See “About managing shared storage using Storage Foundation for Windows”
on page 248.
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About configuring IIS sites
■
If your storage is SCSI-3 compliant and you wish to use SCSI-3 persistent
reservations, enable SCSI-3 support using Veritas Enterprise Administrator
(VEA). VEA is available with SFW HA only.
■
Keep the following information ready. The wizard prompts you for these details:
■
IIS sites to be monitored
■
Application pools associated with each site
■
Port numbers associated with each site
■
Virtual IP addresses and computer names associated with the sites
The virtual IP addresses and the virtual computer names must have forward
and reverse entries in the DNS.
Fixing the IPv6 address configuration for FTP sites
When you add an FTP site using the Add FTP Site wizard, the IPv6 address is not
enclosed in brackets by default. The VCS IIS Configuration Wizard requires the
IPv6 addresses enclosed in square brackets format to correctly configure the FTP
site in the cluster.
1.
From the IIS Manager, right-click the FTP site name and click Bindings.
2.
In the Site Bindings dialog box, select the FTP site and click Edit.
3.
In the Edit Site Binding dialog box, type square brackets around the IPv6
address displayed in the IP address field.
For example, the IPv6 address should display as
[2001:Db8:0:10:828:1871:cd8:5c0f].
4.
Click OK and then click Close.
Installing IIS 7.0 on Windows Server Core
On Windows Server Core, you must install IIS in the order specified in this procedure.
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About configuring IIS sites
To install IIS 7.0 on Windows Server Core
1
Type the following at the command prompt:
C:\>start /w pkgmgr
/iu:IIS-WebServerRole;IIS-WebServer;IIS-CommonHttpFeatures;
IIS-StaticContent;IIS-DefaultDocument;IIS-DirectoryBrowsing;
IIS-HttpErrors;IIS-HttpRedirect;IIS-ApplicationDevelopment;
IIS-ASP;IIS-CGI;IIS-ISAPIExtensions;IIS-ISAPIFilter;
IIS-ServerSideIncludes;IIS-HealthAndDiagnostics;
IIS-HttpLogging;IIS-LoggingLibraries;IIS-RequestMonitor;
IIS-HttpTracing;IIS-CustomLogging;IIS-ODBCLogging;IIS-Security;
IIS-BasicAuthentication;IIS-Win dowsAuthentication;
IIS-DigestAuthentication;
IIS-ClientCertificateMappingAuthentication;
IIS-IISCertificateMappingAuthentication;
IIS-URLAuthorization;IIS-RequestFiltering;IIS-IPSecurity;
IIS-Performance;IIS-HttpCompressionStatic;
IIS-HttpCompressionDynamic;IIS-WebServerManagementTools;
IIS-ManagementScriptingTools;IIS-IIS6ManagementCompatibility;
IIS-Metabase;IIS-WMICompatibility;IIS-LegacyScripts;
IIS-FTPPublishingService;WAS-WindowsActivationService;
IIS-FTPPublishingService;IIS-FTPServer
2
Verify that all the components specified in the earlier step have successfully
installed. Type the following at the command prompt:
C:\>notepad C:\windows\logs\cbs\cbd.log
This opens the log file, cbd.log, in the Notepad text editor.
3
Check the entries in the log file, cbd.log. The last log entry should resemble
the following:
Info CBS Pkgmgr: return code: 0x0
This message indicates that all the components are installed successfully.
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About configuring IIS sites
4
Run the oclist command to verify that the following components are installed:
IIS-WebServerRole; IIS-WebServer; IIS-IIS6ManagementCompatibility;
IIS-Metabase; IIS-WMICompatibility; IIS-FTPPublishingService;
WAS-WindowsActivationService; IIS-FTPPublishingService; IIS-FTPServer
Type the following at the command prompt:
C:\>oclist
5
Repeat the steps on all the nodes where you want to configure the IIS service
group.
Configuring an IIS service group using the wizard
The IIS Configuration Wizard enables you to create and modify IIS service groups,
making sites highly available in VCS cluster.
The wizard creates one resource for each IIS site and its associated application
pools; the wizard does not create resources that monitor only application pools.
To configure an IIS service group using the wizard
1
Start the IIS Configuration Wizard.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > IIS Configuration Wizard.
2
Review the information in the Welcome panel and click Next.
3
On the Wizard Options panel, click Create service group and click Next.
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About configuring IIS sites
4
On the Service Group Configuration panel, specify the service group details
and then click Next.
Specify the following details:
Service Group
Name
Type a name for the IIS service group.
Available Cluster
Systems
Select the systems on which to configure the service group and
click the right arrow to move the systems to the service group's
system list.
To remove a system from the service group's system list, click the
system in the Systems in Priority Order box and click the left arrow.
To change a system's priority in the service group's system list,
click the system from the Systems in Priority Order and click the
up and down arrows.
System priority defines the order in which service groups are failed
over to systems. The system at the top of the list has the highest
priority while the system at the bottom of the list has the lowest
priority.
Include selected
systems in the
service group's
AutoStartList
attribute
To enable the service group to automatically come online on one
of the systems, select this checkbox.
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About configuring IIS sites
5
On the Configure IIS Sites panel, add and remove sites from the service group,
configure IP addresses, ports, and virtual computer names, optionally choose
to configure NetApp SnapMirror resources and then click Next.
Specify the following details:
Add
Check the check box corresponding to the site to be configured
in VCS.
IP
Verify or type the virtual IP address for each site to be configured.
Make sure that each virtual IP address is associated with only one
virtual computer name and vice-versa.
Port
Type the port number for each site to be configured.
Virtual Name
Type a virtual name for the selected site. Each virtual name can
be associated with only one virtual IP address at a time.
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Configure NetApp
SnapMirror
Resource(s)
This is applicable with VCS for Windows only.
Check the Configure NetApp SnapMirror Resource(s) check
box if you want to set up a disaster recovery configuration. The
SnapMirror resource is used to monitor replication between filers
at the primary and the secondary site, in a disaster recovery
configuration.
Note that you must configure the SnapMirror resource only after
you have configured the cluster at the secondary site.
6
On the Network Configuration panel, specify information related to the virtual
IP addresses and then click Next.
Specify the following details:
IP Address
Displays the virtual IP addresses. The wizard groups systems by
the virtual IP addresses associated with the systems.
Subnet Mask
If the virtual IP is an IPv4 address, verify or type the subnet mask
associated with each virtual IPv4 address.
If the virtual IP is an IPv6 address, verify or type the associated
IPv6 prefix. The prefix is generally represented in the following
format: ipv6-address/prefix-length.
For example:
2001:db8:0:1::/64
Adapter Name
7
Select the public adapter associated with the virtual IP address
on each system.
This is applicable with VCS for Windows only.
On the Initiator Selection panel, select the initiator for the virtual disk from the
list of available initiators displayed for each cluster node, and then click Next.
If you are configuring multiPath I/O (MPIO) over Fibre Channel (FC), you must
select at least two FC initiators for each cluster node. Note that the node from
which you run this wizard already has an initiator selected by default. This is
the initiator that was specified when you connected the LUNs to this cluster
node.
8
On the Application Pool Configuration panel, select the monitoring options for
application pools associated with each site and then click Next.
Specify the following details:
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Configuring resources and applications in VCS
About configuring IIS sites
Site Name
Displays the site names.
AppPoolMon
For each site, select the monitoring options from the AppPoolMon
list.
Choose from the following options from the drop-down list:
■
■
■
9
NONE—The agent does not monitor the application pool
associated with the site.
DEFAULT—Starts and monitors the root application pool
associated with the site.
ALL—Starts all application pools associated with the site and
monitors root application pool.
On the Service Group Summary panel, review the service group configuration
and then click Next.
The following service group details are visible:
Resources
Displays a list of configured resources. The wizard assigns unique
names to resources. Change the names of resource, if required.
To edit a resource name, select the resource name and either
click it or press the F2 key. Edit the resource name and then press
the Enter key to confirm the changes. To cancel editing a resource
name, press the Esc key.
Attributes
Displays the attributes and their configured values, for a resource
selected in the Resources list.
10 Click Yes on the dialog that prompts you that the wizard will run commands to
modify the service group configuration.
11 In the completion dialog box, check Bring the service group online if you
want to bring the service group online on the local system, and then click Finish.
Modifying an IIS service group using the wizard
The IIS Configuration Wizard enables you to modify an IIS service group.
Consider the following before you modify an IIS service group:
■
If the IIS service group is online, you must run the wizard from a node on which
the service group is online. You can then use the wizard to add resources to
and remove them from the configuration. You cannot change attributes of
resources that are online.
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About configuring IIS sites
■
To change the resource attributes, you must take the service group offline.
However, the MountV and VMDg (in case of SFW HA), Mount and DiskRes (in
case of Windows LDM), and NetAppSnapDrive and NetAppFiler (in case of VCS
for Windows) resources for the service group should be online on the node
where you run the wizard and offline on all other nodes.
■
If you are running the wizard to remove a node from the service group’s system
list, do not run the wizard on the node being removed.
■
If the service group contains resources that were not part of the default service
group configuration, then modifying the service group may change those
resources. You may then have to manually restore the settings of those resources
later.
To modify the IIS service group
1
Start the IIS Configuration Wizard.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > IIS Configuration Wizard.
2
Review the information on the Welcome panel and click Next.
3
On the Wizard Options panel, click Modify service group, select the service
group to be modified, and click Next.
4
Follow the wizard instructions and make the modifications that you want to the
service group configuration.
See “Configuring an IIS service group using the wizard” on page 289.
Deleting an IIS service group using the wizard
This topic describes steps to delete an IIS service group using the configuration
wizard.
To delete the IIS service group
1
Start the IIS Configuration Wizard on a system configured to host the IIS service
group.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > IIS Configuration Wizard.
2
Review the information in the Welcome panel and click Next.
3
In the Wizard Options panel, click Delete service group, select the service
group to be deleted, and click Next.
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About configuring services
4
In the Service Group Summary panel, click Next. When the message appears
that informs you that the wizard will run commands to delete the service group,
click Yes to delete the service group.
5
Click Finish.
About configuring services
Use the GenericService and ServiceMonitor agents to configure services in a VCS
cluster.
Consider the following before you proceed:
■
To start, stop, and monitor a service, use the GenericService agent.
■
To monitor a service, use the ServiceMonitor agent.
About configuring a service using the GenericService agent
The GenericService agent starts, stops, and monitors services. Before configuring
the service group, review the resource types and attribute definitions of the
GenericService agent, described in the Veritas Cluster Server Bundled Agents
Reference Guide.
You can configure the GenericService agent manually, as described below, or by
using the Application Configuration Wizard.
See “About configuring applications using the Application Configuration Wizard”
on page 315.
On Windows Server Core, you have to add the required resources and configure
the service group manually. You can perform the steps either directly on the Server
Core machine using VCS commands from the command line, or remotely using
the Cluster Manager (Java console).
See “About the Cluster Manager (Java Console)” on page 101.
See “About administering VCS from the command line” on page 182.
Before you configure a service using the GenericService agent
Note the following prerequisites before you configure a service using the
GenericService agent:
■
For the service that you want to configure, change the startup type of the service
to Manual on all the nodes that will be part of the service group.
■
Ensure that the service is stopped on all the nodes that will be part of the service
group.
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About configuring services
■
If monitoring the service in a user-context, configure the service to start in the
context of the specified user account. Make sure the check box Allow service
to interact with desktop is cleared.
Changing a service startup type
Perform these setps to change the startup type of a service to manual.
To change a service startup type to Manual
1
Open the Windows Services Control Manager.
2
Right-click the service and click Properties.
3
In the Properties dialog box, click the General tab.
4
From the Startup Type list, select Manual.
5
Click OK.
6
Close the Services Control Manager.
Configuring a service to run in a user context
Perform the following steps to start a service in a user context.
To configure a service to start in a user-context
1
Open the Services Control Manager.
2
Right-click the service and click Properties.
3
In the Properties dialog box, click the LogOn tab.
4
Click This Account.
5
Click Browse to browse existing user accounts.
6
In the Select User dialog box, click the user in whose context you want to run
the service and click OK.
7
Enter the password for the selected user.
8
Click OK and close the Services Control Manager.
Configuring a service using the GenericService agent
This topic describes how to manually configure a service using the GenericService
agent.
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About configuring services
To configure a service using the GenericService agent
1
In your service group, create a resource of type GenericService.
See “Adding a resource” on page 152.
2
Configure the following required attribute for the GenericService resource:
ServiceName: The name of the service to be monitored, as displayed in the
Windows Service Control Manager console.
3
Configure the following optional attributes for the GenericService resource, if
required:
■
UserAccount: A valid user account in whose context the service will be
monitored. User name can be of the form username@domain.com or
domain.com\username. If you do not specify a value for this attribute, then
the user account of the service in the SCM is ignored. To monitor service
under built-in accounts, you must provide explicit values.
For example:
■
User Account="LocalSystem", "Local Service", or "Network Service".
Domain="NT Authority".
■
Password: The password for the user account.
■
Domain: The domain name to which the user specified in the UserAccount
attribute belongs.
4
Configure other resources in the service group, if required.
5
Bring the GenericService resource, and other resources in the service group,
online.
About configuring a service using the ServiceMonitor agent
The ServiceMonitor agent monitors a service or starts a script that monitors a
service. Before configuring the service group, review the resource types and attribute
definitions of the agent, described in the Veritas Cluster Server Bundled Agents
Reference Guide.
You can configure the agent manually, as described below, or by using the
Application Configuration Wizard.
See “About configuring applications using the Application Configuration Wizard”
on page 315.
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About configuring services
Before you configure a service using the ServiceMonitor agent
Note the following prerequisites before you configure a service using the
ServiceMonitor agent:
■
If using the agent to start a script, copy the script a locally on each node in the
cluster.
■
If using the agent to monitor a service, start the service in the context of the
LocalSystem account or in the context of the user account specified in the
configuration.
■
Verify that the user in whose context the service or script needs to be started,
exists as a domain user or LocalSystem user.
Configuring a service using the ServiceMonitor agent
This topic describes how to manually configure a service using the ServiceMonitor
agent.
To configure a service using the ServiceMonitor agent
1
In your service group, create a resource of type ServiceMonitor.
See “Adding a resource” on page 152.
2
Configure the following required attribute for the ServiceMonitor resource:
■
ServiceorScriptName: The name of the service to be monitored using the
Service Control Manager (SCM). When monitoring the service through a
user defined script, specify the complete path of the script, including any
command-line arguments.
When monitoring a service through a user-defined script, specify the following
attribute values:
■
MonitorService: A flag that defines whether the agent monitors a service
using the SCM or starts a script to monitor a service. If the flag is set to 1,
the agent monitors a service specified by the attribute ServiceOrScriptName.
If the flag is set to 0 the agent starts a script specified by the attribute
ServiceOrScriptName. Default is 1.
■
MonitorProgTimeout: The maximum wait time, in seconds, for the agent to
receive a return value from the monitor script. This attribute is ignored if
the MonitorService flag is set to 1. Default is 30 seconds.
3
Configure other resources in the service group, if required.
4
Bring the ServiceMonitor resource, and other resources in the service group,
online.
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About configuring processes
About configuring processes
Before configuring a Process resource, review the resource types and attribute
definitions of the agent, described in the Veritas Cluster Server Bundled Agents
Reference Guide.
You can configure a Process resource either manually, as described below, or by
using the Application Configuration Wizard.
See “About configuring applications using the Application Configuration Wizard”
on page 315.
On Windows Server Core, you have to add the required resources and configure
the service group manually. You can perform the steps either directly on the Server
Core machine using the VCS commands, or remotely using the Cluster Manager
(Java console).
See “About the Cluster Manager (Java Console)” on page 101.
See “About administering VCS from the command line” on page 182.
Before you configure processes
Note the following prerequisites before you configure processes:
■
The executables configured as the start, stop, and monitor programs must reside
on local drives.
■
When defining the StartProgram, StopProgram, or MonitorProgram attributes,
enclose the path of the executable file in double quotes. Do not enclose
arguments in double quotes. For example, specify the StartProgram attribute
in the following format:
StartProgram = "executable_pathname" arguments
Configuring processes using the Process agent
Complete the following steps to manually configure processes using the Process
agent.
To configure a process
1
In your service group, create a resource of type Process.
See “Adding a resource” on page 152.
2
Configure the following required attribute for the Process resource:
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■
3
StartProgram: The process to be monitored by the agent. You must specify
the complete path of the executable, its file extension, and command-line
arguments, if any. If you define the start program as a script to launch
another program, you must specify the monitor program in the configuration
file.
If you define the start program as a script (a perl script, or a vbs script), the
start program should be the program that interprets the script (perl.exe, or
cscript.exe) and the script itself should be passed as an argument.
Configure the following optional attributes, if required:
■
StartupDirectory: The startup directory for the process indicated by the
StartProgram attribute.
■
MonitorProgram: A program that monitors the process specified as the start
program. You must specify the complete path of the executable, its file
extension, and command-line arguments, if any. If you do not specify a
value for this attribute, VCS monitors the start program. However, if the
start program is a script to launch another program, you must specify a
monitor program.
■
MonitorProgramTimeout: The maximum wait time, in seconds, for the agent
to receive a return value from the monitor routine. This attribute is ignored
if the monitor program is not specified.
4
Configure other resources in the service group, if required.
5
Bring the Process resource, and other resources in the service group, online.
About configuring Microsoft Message Queuing
(MSMQ)
VCS provides several ways to configure MSMQ, including the MSMQ Configuration
Wizard, the MSMQ configuration command-line utility, the Cluster Manager (Java
Console), and the Enterprise Vault Cluster Setup Wizard.
To create an MSMQ service group from the Cluster Manager (Java Console), you
can use the MSMQ service group configuration template, MSMQVMGroup (for
SFW), or MSMQNetAppGroup (for NetApp). These templates are installed at
%vcs_home%\templates directory.
Here, %vcs_home% is the default product installation directory for VCS, typically
C:\Program Files\Veritas\Cluster Server.
Launch the Service Group Configuration Wizard (Tools > Configuration Wizard)
from the Cluster Manager (Java Console) and use these templates to configure the
respective application service groups.
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The following topic describe how to configure an MSMQ service group using the
MSMQ Configuration Wizard. You can use the MSMQ Configuration Wizard to
configure a service group for MSMQ that is installed in Active Directory or in
Workgroup mode. Symantec recommends that you use the MSMQ Configuration
Wizard to create the MSMQ resource and other resources that it depends upon.
Make sure that you review the resource types and attribute definitions of the MSMQ
agent in the Veritas Cluster Server Bundled Agents Reference Guide.
Note: Cluster support for MSMQ triggers is not available. In domain mode MSMQ
installation (MSMQ on a Windows Server), if Routing Support is selected while
installing MSMQ, it is not supported.
Before you configure the MSMQ service group
Note the following prerequisites before you configure the MSMQ service group:
■
Remove the Message Queuing Triggers service if it is already installed. Cluster
support for MSMQ Triggers service is not available in this release.
■
Create volumes or LUNs for the MSMQ data and registry replication information
(RegRep) and then mount or connect the volumes or LUNs on the node where
you run the wizard.
You can use a single volume for both MSMQ data and registry information.
Symantec recommends that you use separate volumes for these components.
See “About managing storage using Windows Logical Disk Manager” on page 241.
See “About managing storage in a Network Appliance storage environment”
on page 246.
See “About managing shared storage using Storage Foundation for Windows”
on page 248.
■
Create directories for MSMQ data and registry information on the mounted
volumes. For example, if X: is the volume, then X:\MSMQ\Storage can be the
storage path for MSMQ.
■
If MSMQ is integrated with Windows Active Directory (AD), then ensure that the
value of the Lanman resource attributes ADUpdateRequired and
ADCriticialForOnline is set to 1, after the service group is configured.
Note: You may receive an error when you try to read messages from a remote
public queue in Microsoft Message Queuing. See article 889860 in the Microsoft
Knowledge Base for more information. To overcome this problem, set the value
of the Lanman resource attributes DNSUpdateRequired and
DNSCriticialForOnline to 1.
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■
Verify that all the existing services that are dependent on the default MSMQ
service are in the STOPPED state.
■
If MSMQ is installed in Domain Mode, perform the following steps before you
bring the MSMQ resource online for the first time:
■
First, bring the Lanman resource online in the service group.
■
Next, in Windows Active Directory, enable the 'Create All Child Objects'
privilege for the VCS Helper Service user account (HAD Helper) on the
MSMQ virtual server.
Note: You do not need to add this privilege if the VCS Helper Service user
account belongs to the Domain Administrator group.
■
Keep the following information ready; the wizard will prompt you for these details:
■
A unique virtual server name for the MSMQ server.
■
A unique virtual IP address for the MSMQ server.
The virtual IP address is required only if you wish to configure an IPv4
address. In case of IPv6, the wizard prompts you to select the IPv6 prefix
and automatically generates an IPv6 address that is valid and unique on the
network. The wizard uses the prefix that is advertised by the router on the
IPv6 network.
Note: Ensure that there is only one IP resource per MSMQ resource. If there
are multiple MSMQ resources that use the same IP resource, only one MSMQ
resource will remain online, and the rest will go into the unknown state.
Configuring the MSMQ resource using the command-line utility
Complete the following steps to configure an MSMQ service group using the MSMQ
configuration utility. Make sure you review the resource types and attribute definitions
of the MSMQ agent in the Veritas Cluster Server Bundled Agents Reference Guide.
To configure an MSMQ service group using the command-line utility
1
Start VCS on all systems.
2
Ensure that all the required resources are online.
3
Ensure that the volume or LUN for the MSMQ data is mounted or connected
on the node on which you are configuring the MSMQ resource.
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4
303
Run the MSMQ configuration utility for VCS.
At the command prompt, type:
msmqconfig -c -n MSMQResourceName -s nodesInServiceGroupSystemList
-m storagePath
Here, storagePath is the volume on which the MSMQ data is stored. The MSMQ
storage path must be created before you run this utility.
For example, if the MSMQ resource name is vxmsmq, nodes in the system
list are S1 and S2, and the storage path created is X:\MSMQ\Storage, then
the command will be as follows:
msmqconfig -c -n vxmsmq -s S1 S2 -m X:\MSMQ\Storage
This will accomplish the preconfiguration, and create the registry key
HKLM\Software\Microsoft\MSMQ\Clustered QMs\MSMQ$vxmsmq for RegRep.
The MSMQ configuration utility stops and restarts the default MSMQ service.
5
From the Java console, add a MountV resource (in case of SFW HA) or a
NetAppSnapDrive resource (in case of VCS) for X:.
A VMDg resource (in case of SFW HA) or a NetAppFiler resource (in case of
VCS) may be required if the existing VMDg or NetAppFiler resources do not
have a spare volume or LUN to host X:.
6
From the Java console, add a RegRep resource with the registry key created
in step 4.
Add a MountV and a VMDg resource (in case of SFW HA) or a
NetAppSnapDrive and a NetAppFiler resource (in case of VCS), if they do not
exist already, for storing the registry replication information required by RegRep.
7
From the Java console, add an MSMQ resource and set the following:
■
IPResName to the existing IP resource name
■
LanmanResName to the existing Lanman resource name
■
StoragePath to the storage path for MSMQ.
Referring to the example in step 3, the storage path will be
\\MSMQ\\Storage.)
■
MountResName to the MountV resource (in case of SFW HA) or
FilerResName to the NetAppSnapDrive resource (in case of VCS) that you
added in step 4
You must disable and enable the MSMQ resource every time you make changes
to the IPResName attribute.
Configuring resources and applications in VCS
About configuring Microsoft Message Queuing (MSMQ)
8
Bring the MSMQ service group online.
9
Run the virtual MMC Viewer (VCSVMMCView.exe) on the node where the MSMQ
resource is online.
At the command prompt, type:
VCSVMMCView.exe -target MSMQ
You will be prompted for the VirtualName of the LanmanResName provided
in the MSMQ resource.
The virtual MMC viewer enables you to create and modify message queues
from the node on which the MSMQ resource is online.
10 Click Yes to launch the virtual server MMC.
You can now create, delete, and modify message queues on the virtual MSMQ.
Configuring the MSMQ service group using the wizard
Complete the following steps to configure an MSMQ service group using the MSMQ
Configuration Wizard. Make sure you review the resource types and attribute
definitions of the MSMQ agent in the Veritas Cluster Server Bundled Agents
Reference Guide.
To configure an MSMQ service group using the MSMQ Configuration Wizard
1
Start the MSMQ Configuration Wizard.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > MSMQ Configuration Wizard.
or, in case of SFW HA,
Click Start > All Programs > Symantec > Veritas Cluster Server > Solutions
Configuration Center to start the Solutions Configuration Center (SCC). In
the SCC, click the Solutions tab and under High Availability Configuration
Wizards click the Launch button for the MSMQ Configuration Wizard.
2
Review the information on the Welcome panel and then click Next.
3
On the Wizard Options panel click Create service group and then click Next.
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4
On the Service Group Configuration panel, specify the service group name,
choose the systems for the service group, and then click Next.
Specify the following details:
Service Group Name Type a name for the MSMQ service group.
Available Cluster
Systems
Select the systems on which to configure the service group and
click the right arrow to move the systems to the service group’s
system list.
To remove a system from the service group’s system list, click
the system in the Systems in Priority Order box and click the left
arrow.
To change a system’s priority in the service group’s system list,
click the system from the Systems in Priority Order and click the
up and down arrows.
System priority defines the order in which service groups are
failed over to systems. The system at the top of the list has the
highest priority while the system at the bottom of the list has the
lowest priority.
Include selected
systems in the
service group's
AutoStartList
attribute
5
To enable the service group to automatically come online on one
of the systems, select this checkbox.
On the Virtual Server Configuration panel, specify information related to your
network and then click Next.
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Do the following:
■
■
Select IPv4 to configure an IPv4 address for the MSMQ virtual server.
■
In the Virtual IP Address field, type a unique virtual IPv4 address for the
MSMQ virtual server.
■
In the Subnet Mask field, type the subnet to which the virtual IPv4
address belongs.
Select IPv6 to configure an IPv6 address for the virtual server. The IPv6
option is disabled if the network does not support IPv6.
■
Select the prefix from the drop-down list. The wizard uses the prefix and
automatically generates an IPv6 address that is valid and unique on the
network.
■
In the Virtual Server name field, type a unique name for the MSMQ virtual
server. This is the name by which clients will connect to the MSMQ server.
The virtual name must not exceed 15 characters.
■
For each system in the cluster, select the public network adapter name.
This field displays the TCP/IP enabled adapters on a system, including the
private network adapters, if applicable. To view the adapters associated
with a system, click the Adapter Display Name field and click the arrow.
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Verify that you select the adapters assigned to the public network, not the
private.
■
Click Advanced Settings to specify additional details for the Lanman
resource.
On the Lanman Advanced Configuration dialog box, do the following:
■
Check Active Directory Update required check box to enable the
Lanman resource to update the Active Directory with the virtual name.
This sets the Lanman agent attributes ADUpdateRequired and
ADCriticalForOnline to true.
■
In the Organizational Unit field, type the distinguished name of the
Organizational Unit for the virtual server in the format
CN=containername,DC=domainname,DC=com.
To browse for an OU, click ... (ellipsis button) and search for the OU
using the Windows Find Organization Units dialog box.
By default, the Lanman resource adds the virtual server to the default
container "Computers."
■
6
Click OK.
The user account for VCS Helper service must have adequate privileges
on the specified container to create and update computer accounts.
On the MSMQ and RegRep Directory Details panel, specify the MSMQ and
registry replication directories and then click Next.
Specify the following details:
MSMQ Directory
Specify the directory path for storing the
MSMQ data. You can either type the path
or click ... (ellipsis button) to browse for a
directory.
The MSMQ agent uses the specified
MSMQ directory to store all the message
queues.
Replication Directory
Specify the directory path for storing the
MSMQ registry data. You can either type
the path or click ... (ellipsis button) to
browse for a directory.
The Registry Replication agent uses the
specified regrep directory to store the
MSMQ registry related information.
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7
This is applicable in case of VCS for Windows and in a NetApp storage
environment.
On the Initiator Selection panel, select the initiator for the virtual disk from the
list of available initiators displayed for each cluster node, and then click Next.
If you are configuring multipath I/O (MPIO) over Fibre Channel (FC), you must
select at least two FC initiators for each cluster node. Note that the node from
which you run this wizard already has an initiator selected by default. This is
the initiator that was specified when you connected the LUNs to this cluster
node.
8
On the Service Group Summary panel, review the service group configuration
and click Next.
The following service group details are visible:
Resources
Displays a list of configured resources. The
wizard assigns unique names to resources.
Change the names of resource, if required.
To edit a resource name, select the
resource name and either click it or press
the F2 key. Edit the resource name and
then press the Enter key to confirm the
changes. To cancel editing a resource
name, press the Esc key.
Attributes
9
Displays the attributes and their configured
values, for a resource selected in the
Resources list.
Click Yes on the dialog that prompts you that the wizard will run commands to
modify the service group configuration.
10 In the completion dialog box, check Bring the service group online check
box if you want to bring the service group online on the local system, and then
click Finish.
This completes the MSMQ service group configuration.
You can now create, delete, and modify message queues on the virtual MSMQ.
Use the VCS Application Manager utility.
See “About the VCS Application Manager utility” on page 335.
Modifying an MSMQ service group using the wizard
The MSMQ Configuration Wizard enables you to modify an MSMQ service group.
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Consider the following before you modify MSMQ service groups using the wizard:
■
If the MSMQ service group is online, you must run the wizard from a system on
which the service group is online. You can then add and remove resources to
the configuration using the wizard; you cannot modify resources that are online.
■
To change the online resource attributes, you must take the service group offline.
However, the MountV and VMDg (in case of SFW HA), Mount and DiskRes (in
case of Windows LDM) and NetAppSnapDrive and NetAppFiler (in case of VCS
for Windows) resources for the service group should be online on the node
where you run the wizard and offline on all other nodes.
■
If you are running the wizard to remove a node from the service group’s system
list, do not run the wizard on the node being removed.
■
If the service group contains resources that were not part of the default service
group configuration, then modifying the service group may change those
resources. You may then have to manually restore the settings of those resources
later.
■
If you are modifying the service group to remove an MSMQ resource, make
sure you offline the resource before deleting it.
To modify an MSMQ service group using the MSMQ Configuration Wizard
1
Start the MSMQ Configuration Wizard.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > MSMQ Configuration Wizard.
or, in case of SFW HA
Click Start > All Programs > Symantec > Veritas Cluster Server > Solutions
Configuration Center to start the Solutions Configuration Center (SCC). In
the SCC, click the Solutions tab and under High Availability Configuration
Wizards click the Launch button for the MSMQ Configuration Wizard.
2
Read the information on the Welcome panel and click Next.
3
On the Wizard Options panel, click Modify service group, select the service
group to be modified, and click Next.
4
Follow the wizard instructions and make desired modifications to the service
group configuration.
See “Configuring the MSMQ service group using the wizard” on page 304.
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About configuring the infrastructure and support agents
About configuring the infrastructure and support
agents
On Windows Server Core, you have to add the required resources and configure
the service group manually. You can perform the steps either directly on the Server
Core machine using the VCS commands, or remotely using the Cluster Manager
(Java console).
See “About the Cluster Manager (Java Console)” on page 101.
See “About administering VCS from the command line” on page 182.
Note: If you have configured a firewall, add ports 14141 and 14150 to the exceptions
list.
Before configuring the service group, review the resource types and the attribute
definitions of the agents, described in the Veritas Cluster Server Bundled Agents
Reference Guide.
About configuring notification
Use the NotifierMngr agent to set up notification in your cluster. Review the
information about how VCS handles notification.
See “About VCS event notification” on page 433.
VCS provides a wizard to set up notification.
See “Setting up VCS event notification by using the Notifier wizard” on page 173.
Configuring registry replication
The Registry Replication (RegRep) agent replicates the registry of the active cluster
node.
To configure registry replication
1
Configure an exclusive MountV resource (in case of SFW HA), or a Mount
resource (in case of Windows LDM), or a NetAppSnapDrive resource (in case
of VCS for Windows) for the Registry Replication agent. Verify that no other
applications use this resource.
See “About storage configuration” on page 240.
2
Create a resource of type RegRep.
See “Adding a resource” on page 152.
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3
Configure the following required attributes for the RegRep resource.
■
Keys: The list of registry keys to be monitored. From the ‘name-value' pair
of a registry key, you must provide the name of the registry keys to be
synchronized and not the value for that key.
When defining the keys, you must use abbreviations.
See “About registry hive abbreviations” on page 311.
Instructions on how to exclude certain keys from being replicated are
available.
See “About excluding keys” on page 312.
Instructions on how to replicate registry keys without replicating the subkey
are available.
See “About ignoring subkeys” on page 312.
Do not configure more than 63 keys for a single RegRep resource otherwise
the resource will go in an unknown state.
■
MountResName or FilerResName: The name of the MountV resource (in
case of SFW HA) or Mount resources (in case of Windows LDM), or
NetAppSnapDrive resource (in case of VCS for Windows) on which the
Registry Replication agent depends. The resource specifies the mount drive
or LUN on the shared disk where the log file is created.
■
ReplicationDirectory: The directory on the shared disk in which the registry
changes are logged.
4
Configure other resources for the service group, if required.
5
Link the RegRep and MountV (in case of SFW HA), or Mount (in case of
Windows LDM), or NetAppSnapDrive (in case of VCS for Windows) resources
such that the RegRep resource depends on the MountV, Mount, or
NetAppSnapDrive resource.
See “Linking resources” on page 162.
6
Bring the RegRep resource, and other resources in the service group, online.
About registry hive abbreviations
To configure a registry key to be replicated or excluded, use the abbreviation
corresponding to the registry hive as described in the following table.
Table 8-1 shows the abbreviation corresponding to the registry hive.
Table 8-1
RegRep agent - Registry hive and abbreviations
Registry Hive
Abbreviation to use
HKEY_LOCAL_MACHINE
HKLM
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Table 8-1
RegRep agent - Registry hive and abbreviations (continued)
Registry Hive
Abbreviation to use
HKEY_CURRENT_USER
HKCU
HKEY_USERS
HKU
HKEY_CURRENT_CONFIG
HKCC
HKEY_CLASSES_ROOT
HKCR
About excluding keys
This topic describes the algorithm the Registry Replication agent uses while
excluding keys. For example, assume a registry key KEY_X has a subkey of KEY_Y,
which has another subkey KEY_Z. This key would appear as KEY_X\KEY_Y\KEY_Z
in the Registry Editor. The following table describes various scenarios of keys
marked for replication and for exclusion. The Result column describes the agent
behavior in these scenarios.
Table 8-2 shows Registry Replication exclude keys and behavior.
Table 8-2
RegRep agent - Exclude keys and behavior
Keys for
replication
Exclude keys
Result
KEY_X
KEY_Y\KEY_Z
KEY_Y is excluded, so is KEY_Z.
KEY_X
KEY_Y
KEY_Y is excluded, so is KEY_Z.
KEY_X
KEY_X
KEY_X is not excluded and an error
message is logged.
KEY_X\KEY_Y
KEY_X
KEY_X is not excluded and an error
message is logged.
About ignoring subkeys
Use the IgnoreSubKeys option for the Keys attribute to prevent the Registry
Replication agent from replicating the subkeys. The following table describes
possible combination of values for the Keys attribute. The Result column describes
the agent behavior in these scenarios:
Table 8-3 shows the IgnoreSubKeys and their behavior for the Registry replication
agent.
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Table 8-3
RegRep agent - IgnoreSubKeys and behavior
Value specified for "Keys" attribute
Result
"HKLM\SOFTWARE\VERITAS\VCS"
Replicates the subkeys
"HKLM\SOFTWARE\VERITAS\VCS"=IgnoreSubKeys
Does not replicate the
subkeys
"HKLM\SOFTWARE\VERITAS\VCS"=IgnoreSubKeys:Yes
Does not replicate the
subkeys
"HKLM\SOFTWARE\VERITAS\VCS"=IgnoreSubKeys:No
Replicates the subkeys
"HKLM\SOFTWARE\VERITAS\VCS"=<any other value>
Replicates the subkeys
About additional considerations for using IgnoreSubKeys
Symantec recommends not to set the IgnoreSubKeys value when the RegRep
resource is online. Even if the value is set with the resource online, the changes
will be applicable after the next online function.
Configuring a proxy resource
The Proxy agent monitors and mirrors the state of a resource on a local or remote
system in a VCS cluster. Use this agent to reduce overheads in configurations
where multiple resources point at the same physical device. For example, if multiple
service groups use the same NIC, configure one service group to monitor the NIC
and have Proxy resources in the other service groups to mirror the state of the NIC
resource.
To configure a proxy resource
1
Create a resource of type Proxy.
See “Adding a resource” on page 152.
2
Configure the following required attribute for the Proxy resource:
■
TargetResName: The name of the target resource whose status is to be
monitored and mirrored by the Proxy resource.
If required, configure the following optional attribute for the Proxy resource:
■
TargetSysName: The name of the system associated with the target
resource. If this attribute is not specified, the Proxy resource assumes the
system is local.
3
Configure other resources for the service group, if required.
4
Bring the Proxy resource, and other resources in the service group, online.
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Configuring a phantom resource
A Phantom resource enables VCS to determine the status of service groups that
do not include OnOff resources.
To configure a phantom resource
1
Create a resource of type Phantom.
See “Adding a resource” on page 152.
2
Configure other resources for the service group, if required.
3
Bring the Phantom resource, and other resources in the service group, online.
Configuring file resources
The FileNone, ElifNone, FileOnOff, and FileOnOnly agents help you test VCS
functionality as follows:
■
The FileNone agent monitors a file and returns ONLINE if the file exists.
■
The ElifNone agent monitors a file and returns ONLINE if the file does not exist.
■
The FileOnOff agent creates, removes, and monitors a file.
■
The FileOnOnly agent creates and monitors a file.
The process of configuring these resources is similar.
To configure a file resource
1
In your service group, create a resource of the desired type.
See “Adding a resource” on page 152.
2
Configure the required attribute PathName for the resource.
3
If required, configure additional resources in the service group.
4
Bring the file resource, and other resources, in the service group online.
Configuring a RemoteGroup resource
The RemoteGroup agent establishes dependencies between applications that are
configured on different VCS clusters. With the RemoteGroup agent you can monitor
or manage a service group that exists in a remote cluster.
Some points about configuring the RemoteGroup resource are as follows:
■
For each remote service group that you want to monitor or manage, you must
configure a corresponding RemoteGroup resource in the local cluster.
■
Multiple RemoteGroup resources in a local cluster can manage corresponding
multiple remote service groups in different remote clusters.
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About configuring applications using the Application Configuration Wizard
■
You can include the RemoteGroup resource in any kind of resource or service
group dependency tree.
■
A combination of the state of the local service group and the state of the remote
service group determines the state of the RemoteGroup resource.
Before configuring the RemoteGroup resource, review the resource types, the
attribute definitions, and the sample scenario described in the Veritas Cluster Server
Bundled Agents Reference Guide.
To configure a RemoteGroup resource
1
In your service group, create resources of type IP and NIC.
See “Adding a resource” on page 152.
2
Create a resource of type RemoteGroup.
See “Adding a RemoteGroup resource from the Java Console” on page 154.
3
Configure the required attributes for the RemoteGroup resource. See the Veritas
Cluster Server Bundled Agents Reference Guide for more information on the
required attributes and their definitions.
4
Link the resources as follows:
■
Link the IP and NIC resources such that the IP resource depends on the
the NIC resource.
■
Link the RemoteGroup and NIC resources such that the RemoteGroup
resource depends on the NIC resource.
See “Linking resources” on page 162.
5
Configure other resources in the service group, if required.
6
Bring the IP, NIC, and RemoteGroup resources online.
About configuring applications using the Application
Configuration Wizard
VCS provides an Application Configuration Wizard to create service groups to
monitor applications that are configured as resources of type GenericService,
ServiceMonitor, or Process. You can also use the wizard to add registry replication
and network resources to application service groups.
Note: The wizard does not configure the registry replication and network resources
independently. It configures these resources as part of a service group that has
application resources.
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About configuring applications using the Application Configuration Wizard
On Windows Server Core, you have to add the required resources and configure
the service group manually. You can perform the steps either directly on the Server
Core machine using the VCS commands, or remotely using the Cluster Manager
(Java console).
See “About the Cluster Manager (Java Console)” on page 101.
See “About administering VCS from the command line” on page 182.
Before configuring the service group, review the resource types and the attribute
definitions of the agents, described in the Veritas Cluster Server Bundled Agents
Reference Guide.
Before you configure service groups using the Application
Configuration wizard
Note the following prerequisites before you configure application service groups
using the Application Configuration wizard:
■
Verify that the application you wish to configure is installed on the nodes that
are going to be part of the service group.
■
Verify that the startup type of the application service that you wish to configure
is set to manual on all the nodes that are going to be part of the service group.
■
Verify that the application service is stopped on all the nodes that are going to
be part of the service group.
■
Verify that the shared drives or LUNs required by the applications are mounted
on the node where you run the wizard.
See “About managing storage using Windows Logical Disk Manager” on page 241.
See “About managing storage in a Network Appliance storage environment”
on page 246.
See “About managing shared storage using Storage Foundation for Windows”
on page 248.
■
If you have configured a firewall, add the following to the firewall exceptions list:
■
Port 14150 or the VCS Command Server service:
%vcs_home%\bin\CmdServer.exe
Here, %vcs_home% is the installation directory for VCS, typically: C:\Program
Files\Veritas\Cluster Server.
■
Port 14141
For a detailed list of services and ports used, refer to the product installation
and upgrade guide.
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About configuring applications using the Application Configuration Wizard
■
Before running the wizard, make sure you have the following information ready:
■
Details of the application (for example, application type, service name, start
parameters, startup directory) that you wish to configure.
■
Shared storage used by the applications.
■
Application registry entries for configuring registry replication.
■
Network and virtual computer (Lanman) details for the application.
Note: These prerequisites apply to Application Configuration Wizard. For
agent-specific prerequisites, see the agent descriptions in the Veritas Cluster Server
Bundled Agents Reference Guide.
Adding resources to a service group
This topic describes how to use the Application Configuration Wizard to add
resources to a service group.
To add resources to a service group
1
Start the Application Configuration Wizard.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > Application Configuration Wizard.
2
Review the information on the Welcome panel and click Next.
3
On the Wizard Options panel, click Create service group and click Next.
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4
On the Service Group Configuration panel, specify the following service group
details and then click Next:
Service Group
Name
Type a name for the service group.
Available
Select the systems on which to configure the service group and click
Cluster Systems the right arrow to move the systems to the service group's system
list.
To remove a system from the service group's system list, click the
system in the Systems in Priority Order box and click the left arrow.
To change a system's priority in the service group's system list, click
the system from the Systems in Priority Order and click the up and
down arrows.
System priority defines the order in which service groups are failed
over to systems. The system at the top of the list has the highest
priority while the system at the bottom of the list has the lowest
priority.
Include selected To enable the service group to automatically come online on one of
systems in the the systems, select this checkbox.
service group's
AutoStartList
attribute
5
The Application Options dialog box provides you the option to specify the type
of application to be configured.
The following options are available:
Generic
Service
Configures a service using the Generic Service agent. The agent brings
services online, takes them offline, and monitors their status.
See “Configuring a GenericService resource” on page 319.
Process
Configures a process using the Process agent. The agent brings
processes online, takes them offline, and monitors their status.
See “Configuring processes” on page 320.
Service
Monitor
Configures a service using the ServiceMonitor agent. The agent monitors
a service or starts a user-defined script and interprets the exit code of the
script.
See “Adding resources to a service group” on page 317.
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Configuring a GenericService resource
This topic descibes how to use the Application Configuration Wizard to configure
a GenericService resource.
To configure a GenericService resource
1
In the Application Options panel, click Create, select GenericService from the
corresponding drop-down list, and click Next.
2
On the Generic Service Options panel, specify the details of the service that
you wish to configure and then click Next.
Specify the service for which you wish to configure a GenericService resource
and then specify the following attributes:
3
■
Click the ... (ellipsis button) adjacent to the Service Name text box.
■
In the Services dialog box, select a service and click OK. The selected
service appears in the Service Name text box.
■
In the Start Parameters text box, provide the start parameters for the service,
if any.
■
In the Delay After Online text box, specify the number of seconds the agent
waits after the service is brought online before starting the monitor function.
■
In the Delay After Offline text box, specify the number of seconds the agent
waits after the service is taken offline before starting the monitor function.
On the User Details panel, specify the details of the user in whose context the
service will run and then click Next.
Do the following:
4
■
To configure a service to run in the context of a local system account, click
Local System account.
■
To configure a service to run in the context of another user account, click
This Account and then specify the Domain Name, User Name, and
Password in the respective fields.
On the Shared Storage Option panel, under Available Shared Drives box,
select the check box adjacent to the shared drive and then click Next.
This is the shared storage that is required by the GenericService resource.
The shared storage that you select will be in addition to the mount where the
service binaries exist.
5
In the Application Resource Summary panel, review the summary of the
GenericService resource. Click Back to make changes. Otherwise, click Next.
6
In the Application Options dialog box, select one of the following options:
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■
To configure another GenericService resource, repeat step To configure a
GenericService resource through step To configure a GenericService
resource.
■
To configure a Process resource:
See “Configuring processes” on page 320.
■
To configure a ServiceMonitor resource:
See “Configuring a ServiceMonitor resource” on page 322.
■
To configure other resources, including FileShare, Registry Replication,
and Network resources:
See “Configuring VCS components” on page 323.
If you do not wish to add any more resources, proceed to configuring the service
group.
See “Configuring service groups using the Application Configuration Wizard”
on page 327.
Configuring processes
This topic describes how to use the Application Configuration Wizard to configure
processes.
To configure processes
1
In the Application Options panel, click Create, select Process from the
corresponding list, and click Next.
2
On the Process Details panel, specify the details of the process that you wish
to configure and then click Next.
Specify the process details as follows:
■
In the Start Program text box, specify the complete path of the program
that will start the process to be monitored by VCS. You can choose to either
type the location of the program or browse for it using ... (ellipsis button).
■
In the Start Program Parameters text box, specify the parameters used by
the Process agent start program.
■
In the Program Startup Directory text box, type the complete path of the
Process agent program or browse for it by clicking ... (ellipsis button).
■
In the Stop Program text box, type the complete path of the program that
will stop the process started by the Start Program or browse for it by clicking
... (ellipsis button).
■
In the Stop Program Parameters text box, specify the parameters used by
the stop program.
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3
■
In the Monitor Program text box, type the complete path of the program
that monitors the Start Program or browse for it by clicking ... (ellipsis button).
If you do not specify a value for this attribute, VCS monitors the Start
Program. If the Start Program is a script to launch another program, you
must specify a monitor program.
■
In the Monitor Program Parameters text box, specify the parameters used
by the monitor program.
■
In the Clean Program text box, type the complete path of the Clean process
or browse for it by clicking ... (ellipsis button).
If no value is specified, the agent kills the process indicated by the Start
Program.
■
In the Clean Program Parameters text box, specify the parameters used
by the Clean program.
■
Check the Process interacts with the desktop check box if you want the
process to interact with your Windows desktop. Setting this option enables
user intervention for the process.
On the User Details panel, specify information about the user in whose context
the process will run and then click Next.
Do the following:
4
■
To configure a service to run in the context of a local system account, click
Local System account.
■
To configure a service to run in the context of another user account, click
This Account and then specify the Domain Name, User Name, and
Password in the respective fields.
■
Click Next.
On the Shared Storage Option panel, under Available Shared Drives box,
select the check box adjacent to the shared drive and then click Next.
This is the shared storage required by the Process resource. The shared
storage that you select will be in addition to the mount where the process
binaries exist.
5
In the Application Resource Summary panel, review the summary of the Process
resource. Click Back to make changes. Otherwise, click Next.
6
In the Application Options dialog box, select one of the following options:
■
To configure another Process resource, repeat step 1 through step 5.
■
To configure a GenericService resource:
See “Configuring a GenericService resource” on page 319.
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■
To configure a ServiceMonitor resource:
See “Configuring a ServiceMonitor resource” on page 322.
■
To configure other resources, including Registry Replication and Network
resources:
See “Configuring VCS components” on page 323.
If you do not want to add any more resources, proceed to configuring the
service group.
See “Configuring service groups using the Application Configuration Wizard”
on page 327.
Configuring a ServiceMonitor resource
This topic descibes how to use the Application Configuration Wizard to configure
a ServiceMonitor resource.
To configure a ServiceMonitor resource
1
In the Application Options panel, click Create, select ServiceMonitor from the
corresponding drop-down list, and click Next.
2
Specify the service to be monitored or a user-defined script to monitor a service.
If you want VCS to monitor the service, do the following:
■
Select the Service option and click ... (ellipsis button) adjacent to the Service
Name text box.
■
In the Service dialog box, select the service and click OK. The selected
service name appears in the Service Name text box. Alternatively, you may
also type the service name to be monitored.
■
Click Next.
If you want a script to monitor the service, do the following:
3
■
Click ... (ellipsis button) and specify the complete path for the script.
■
Specify the parameters for the script.
■
Specify the time in seconds for the agent to receive a return value from the
monitor script.
■
Click Next.
On the User Details panel, specify the user information in whose context the
service will be monitored.
Do the following:
■
To configure a service to run in the context of a local system account, click
Local System account.
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■
To configure a service to run in the context of another user account, click
This Account and then specify the Domain Name, User Name, and
Password for the user account.
If the service selected in step 2 is running in the context of a local system
account, the This Account option is disabled. Similarly, if the service is
running in the context of any other user account, the Local System account
option is disabled.
■
Click Next.
Service Monitor resource belongs to the category of persistence resources.
Such resources do not depend on other VCS resources, including shared
storage. Hence, the Shared Storage Option dialog box does not appear if
you select the ServiceMonitor option.
4
In the Application Resource Summary panel, review the summary of the
ServiceMonitor resource. Click Back to make changes. Otherwise, click Next.
5
In the Application Options dialog box, select one of the following options:
■
To configure another ServiceMonitor resource, repeat step 1 through step
4.
■
To configure a GenericService resource:
See “Configuring a GenericService resource” on page 319.
■
To configure a Process resource:
See “Configuring processes” on page 320.
■
To configure other resources, including Registry Replication and Network
resources:
See “Configuring VCS components” on page 323.
If you do not want to add any more resources, proceed to configuring the
service group.
See “Configuring service groups using the Application Configuration Wizard”
on page 327.
Configuring VCS components
Applications configured using GenericService or Process resources may require
network components or registry replication resources. You can configure these
VCS components only for service groups created using the wizard.
Note: Configure these components only after configuring all application resources.
The wizard creates a service group after these components are configured. To add
more application resources, you must rerun the wizard in the Modify mode.
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About configuring applications using the Application Configuration Wizard
To configure VCS components
1
In the Application Options panel, click Configure Other Components.
2
Select the VCS component to be configured for your applications.
The available options are as follows:
■
Registry Replication Component: Select this option to configure registry
replication for your application. To configure a Registry Replication resource,
proceed to step 3.
■
Network Component: Select this option to configure network components
for your application. If you wish to configure a virtual computer name, check
Lanman component also. To configure a network resource, proceed to
step 5.
The wizard does not enable the Lanman Component check box unless the
Network Component check box is checked.
3
Specify the registry keys to be replicated.
The RegistryReplication dialog box appears only if you chose to configure the
Registry Replication Component in the Application Component dialog box.
■
Specify the directory on the shared disk in which the registry changes are
logged.
■
Click Add.
■
In the Registry Keys dialog box, select the registry key to be replicated.
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■
Click OK. The selected registry key is added to Registry KeyList box.
■
This is applicable in case of VCS for Windows only.
Check the Configure NetApp SnapMirror Resource(s) check box if you
want to set up a disaster recovery configuration. The SnapMirror resource
is used to monitor replication between filers at the primary and the secondary
site, in a disaster recovery configuration. Note that you must configure the
SnapMirror resource only after you have configured the cluster at the
secondary site.
■
Click Next.
If you chose Network Component from the Application Component dialog box,
proceed to the next step. Otherwise, proceed to step 6.
4
This step is applicable in case of VCS for Windows only.
On the Initiator Selection panel, select the initiator for the virtual disk from the
list of available initiators displayed for each cluster node, and then click Next.
If you are configuring multipath I/O (MPIO) over Fibre Channel (FC), you must
select at least two FC initiators for each cluster node. Note that the node from
which you run this wizard already has an initiator selected by default. This is
the initiator that was specified when you connected the LUNs to this cluster
node.
5
The Virtual Computer Configuration dialog box appears only if you chose to
configure the Network Component in the Application Component dialog box.
Specify the network related information as follows:
■
■
Select IPv4 to configure an IPv4 address for the virtual server.
■
In the Virtual IP Address field, type a unique virtual IPv4 address for the
virtual server.
■
In the Subnet Mask field, type the subnet to which the virtual IPv4
address belongs.
Select IPv6 to configure an IPv6 address for the virtual server. The IPv6
option is disabled if the network does not support IPv6.
■
■
Select the prefix from the drop-down list. The wizard uses the prefix and
automatically generates an IPv6 address that is valid and unique on the
network.
In the Virtual Server Name field, enter a unique virtual computer name by
which the node will be visible to the other nodes.
The virtual name must not exceed 15 characters. Note that the Virtual
Computer Name text box is displayed only if you chose to configure the
Lanman Component in Application Component dialog box.
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■
For each system in the cluster, select the public network adapter name. To
view the adapters associated with a system, click the Adapter Display
Name field and click the arrow.
Note that the wizard displays all TCP/IP enabled adapters on a system,
including the private network adapters, if applicable. Ensure that you select
the adapters assigned to the public network, not the private.
■
Click Advanced and then specify additional details for the Lanman resource
as follows:
■
Check AD Update required to enable the Lanman resource to update
the Active Directory with the virtual name.
This sets the Lanman agent attributes ADUpdateRequired and
ADCriticalForOnline to true.
■
In the Organizational Unit field, type the distinguished name of the
Organizational Unit for the virtual server in the format
CN=containername,DC=domainname,DC=com.
To browse for an OU, click ... (ellipsis button) and search for the OU
using the Windows Find Organization Units dialog box. By default, the
Lanman resource adds the virtual server to the default container
"Computers."
The user account for VCS Helper service must have adequate privileges
on the specified container to create and update computer accounts.
■
■
6
Click OK.
Click Next.
In the Application Options dialog box, select one of the following options:
■
To configure additional VCS components, repeat step 1 through step 5.
■
To configure a GenericService resource:
See “Configuring a GenericService resource” on page 319.
■
To configure a Process resource:
See “Configuring processes” on page 320.
■
To configure a Service Monitor resource:
See “Configuring a ServiceMonitor resource” on page 322.
If you do not want to add any more resources, proceed to configuring the
service group:
See “Configuring service groups using the Application Configuration Wizard”
on page 327.
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Configuring service groups using the Application Configuration Wizard
The Application Configuration Wizard enables you to create service group for the
application resources and other VCS components configured using the wizard. This
topic describes how to create the service group using the wizard.
To configure a service group using the wizard
1
In the Application Options panel, click Configure application dependency
and create service group.
The option is enabled only if the following conditions are met:
2
■
Resources and VCS components are already configured using the wizard.
■
You clicked Modify Service Groups in the Wizard Options panel.
Specify the dependency between the applications.
You must have at least two resources configured for this dialog box to appear.
Of the two resources, one should either be a GenericService or a Process
resource.
■
From the Select Application list, select the application that would depend
on other applications. The selected application becomes the parent
application.
■
From the Available Applications list, select the application on which the
parent application would depend and click the right-arrow icon to move the
application to the Child Applications list.
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To remove an application from the Child Applications list, select the
application in the list and click the left arrow.
■
3
Repeat these steps for all such applications for which you want to create
a dependency.
Click Next.
The Application Dependency dialog box enables you to link resources
configured using the wizard. If these resources are dependent on other
services outside the VCS environment, you should first configure resources
for such services and then create the appropriate dependency.
On the Service Group Summary panel, review the service group configuration
and click Next.
The following service group details are visible:
Resources
Displays a list of configured resources. The wizard assigns unique
names to resources. Change the names of resource, if required.
To edit a resource name, select the resource name and either click
it or press the F2 key. Edit the resource name and then press the
Enter key to confirm the changes. To cancel editing a resource
name, press the Esc key.
Attributes
Displays the attributes and their configured values, for a resource
selected in the Resources list.
4
Click Yes on the dialog that prompts you that the wizard will run commands to
modify the service group configuration.
5
In the completion panel, check Bring the service group online if you want to
bring the service group online on the local system.
6
Click Finish to create the service group and exit the Application Configuration
Wizard.
Modifying an application service group
You can modify an application service group using the Application Configuration
Wizard.
Consider the following before you modify service groups using the wizard:
■
If the service group to be modified is online, you must run the wizard from a
system on which the service group is online. You can then use the wizard to
add or remove resources from the configuration. You cannot modify resources
that are online.
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■
To change the resource attributes, you must take the service group offline.
However, the MountV and VMDg (in case of SFW HA), Mount and DiskRes (in
case of Windows LDM), and NetAppSnapDrive and NetAppFiler (in case of VCS
for Windows) resources for the service group should be online on the node
where you run the wizard and offline on all other nodes.
■
If you are running the wizard to remove a node from the service group’s system
list, do not run the wizard on the node being removed.
■
If the service group contains resources that were not part of the default service
group configuration, then modifying the service group may change those
resources. You may then have to manually restore the settings of those resources
later.
Note: Symantec recommends that you do not use the wizard to modify service
groups that were not created using the wizard.
To modify an application service group
1
Start the Application Configuration Wizard.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > Application Configuration Wizard.
2
Review the information on the Welcome panel and click Next.
3
On the Wizard Options panel, click Modify service group. From the Service
Groups list, select the service group containing the resource that you want to
modify and click Next.
4
On the Service Group Configuration panel, if required, make changes as
appropriate to update the SystemList and AutoStartList attributes, and then
click Next.
If you want the service group to automatically come online on one of the
systems, make sure to select the Include selected systems in the service
group's AutoStartList attribute checkbox.
5
Click Modify, select the resource you want to modify and then click Next.
The Modify option is enabled only if the following conditions are met:
■
Service and Process resources are already configured using the wizard.
■
You selected the Modify Service Groups option in the Wizard Options
panel.
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6
Depending on the resource you chose to modify from the Application Options
page, you would either get the Generic Service Options, Process Details, or
the Service Monitor Options dialog box.
Make required changes in the appropriate dialog box and click Next.
See “Configuring a GenericService resource” on page 319.
See “Configuring processes” on page 320.
See “Configuring a ServiceMonitor resource” on page 322.
7
On the User Details dialog box, specify the user information and click Next.
8
On the Application Resource Summary dialog box, review the summary of the
resource.
Click Back to make changes. Otherwise, click Next.
9
Repeat step 5 through step 8 for each resource that you want to modify.
10 After modifying the required resources, you can:
■
Add additional resources to the service group.
See “Adding resources to a service group” on page 317.
■
Delete resources from the service group.
See “Deleting resources from a service group” on page 330.
■
Add VCS components to the service group.
See “Configuring VCS components” on page 323.
■
Create the service group.
See “Configuring service groups using the Application Configuration Wizard”
on page 327.
Deleting resources from a service group
This topic describes how to delete a resource within a service group using the
Application Configuration Wizard.
To delete a resource
1
Start the Application Configuration Wizard.
Click Start > All Programs > Symantec Cluster Server > Configuration
Tools > Application Configuration Wizard.
2
Read the text on the Welcome panel and click Next.
3
In the Wizard Options panel, click Modify Service Group. From the Service
Groups list, select the service group containing the resource that you want to
delete and click Next.
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4
In the Service Group Configuration panel, click Next.
5
In the Application Options panel, click Delete, select the resource you want to
delete, and click Next.
6
In the Warning dialog box, click No to retain the selected resource. Otherwise,
click Yes.
The specified resource will be deleted when you exit the wizard after selecting
the Configure application dependency and create service group option in
the Application Options panel.
7
After marking the resource for deletion, you can:
■
Add additional resources to the service group.
See “Adding resources to a service group” on page 317.
■
Modify resources in the service group.
See “Modifying an application service group” on page 328.
■
Add VCS components to the service group.
See “Configuring VCS components” on page 323.
■
Create the service group.
See “Configuring service groups using the Application Configuration Wizard”
on page 327.
Deleting an application service group
This topic describes steps to delete an application service group using the
Application Configuration Wizard.
To delete a service group
1
Start the Application Configuration Wizard on a system configured to host the
application service group.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > Application Configuration Wizard.
2
Review the information in the Welcome panel and click Next.
3
In the Wizard Options panel, click Delete service group, select the service
group to be deleted, and click Next.
4
In the Service Group Summary panel, click Next.
5
When a message appears that informs you that the wizard will run commands
to delete the service group, click Yes.
6
Click Finish.
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Configuring the service group in a non-shared storage environment
Configuring the service group in a non-shared storage
environment
If you are using a non-shared storage configuration, you have to use the VCS
MountV – VMNSDg agents to monitor your local storage. Currently, the service
group configuration wizards do not support configuring these agents in the service
group. You have to configure these agents manually by using the Cluster Manager
(Java Console) or the VCS commands.
VCS provides templates for configuring service groups that use non-shared storage
agent resources.
The Java Console templates are located in the following directory:
%VCS_HOME%\Templates
Here, %VCS_HOME% is the default product installation directory for VCS, typically,
C:\Program Files\Veritas\Cluster Server.
For information about adding a service group using templates from the Java Console,
refer to the following:
The following steps describe how to create a service group using the Cluster
Manager (Java Console).
To configure the service group in a non-shared storage environment
1
Open the Cluster Manager (Java Console). Click Start > All Programs >
Symantec > Veritas Cluster Server and then click Veritas Cluster Manager
- Java Console.
2
Log on to the cluster. On the Cluster Monitor window click File > New Cluster,
then on the New Cluster window type localhost in the Host name field, and
then click OK.
3
Launch the service group configuration wizard. From the Cluster Explorer
window menu, click Tools > Configuration Wizard.
4
On the Service Group Configuration Wizard Welcome panel, click Next.
5
Fill in the following information and then click Next:
6
■
Specify a name for the service group.
■
Select the systems for the service group. Click a system in the Available
Systems box and then click the right arrow to move the systems to Systems
for Service Group.
■
Leave the service group type as the default, Failover.
Click Next again.
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Configuring the service group in a non-shared storage environment
7
In the Templates list, select the desired service group template depending on
the configuration and then click Next.
The Templates box lists the templates available on the system to which Cluster
Manager is connected. The resource dependency graph of the templates, the
number of resources, and the resource types are also displayed.
8
Click Next. The wizard starts creating the service group.
9
After the service group is successfully created, click Next to edit attributes
using the wizard.
10 The wizard lists the resources and their attributes. You must specify values for
the mandatory attributes that appear in bold. The remaining resources listed
in the window are preconfigured by the template and do not require editing.
To modify an attribute, do the following:
■
Click the resource.
■
Click the attribute to be modified.
■
Click the Edit icon at the end of the table row.
■
In the Edit Attribute dialog box, enter the attribute values.
■
Click OK.
For details on application-specific agent attributes, refer to the
application-specific agent or solutions guide.
For details on the storage and network agent attributes, refer to the VCS
Bundled Agents Reference Guide.
11 Click Finish.
12 Right-click the newly created service group and select Enable Resources.
13 Right-click the newly created service group, select Online from the context
menu, and then select a system on which to bring the service group online.
If you are configuring the service group on a node at the secondary site in a
DR environment, bring the service group online only after completing all the
DR configuration steps.
Setting the timeout duration for which the VMNSDg agent waits for
all the disks to arrive before importing the disk group
During the disk group import operation, the VMNSDg agent waits for all the disks
to arrive before importing the disk group. In case there are some missing disks, the
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Configuring resources and applications in VCS
Configuring the service group in a non-shared storage environment
VMNSDg resource will fault after this time. The default timeout duration is 60s. This
time duration can also be controlled using the following registry key:
■
HKLM\Software\Veritas\VCS\BundledAgents\VMNSDg\<resource_name>\DgImportWaitTimeOut:
Set the value of the DgImportWaitTimeOut key to the time duration in seconds
for which the VMNSDg agent waits for all the disks to arrive before importing
the disk group.
You must create this registry key manually. Perform the following steps to create
and set the DgImportWaitTimeOut registry key.
Note: Incorrectly editing the registry may severely damage your system. Make a
backup copy before making changes to the registry.
To configure DgImportWaitTimeOut registry parameter:
1
To open the Registry Editor, click Start > Run, type regedit, and then click OK.
2
In the registry tree (on the left), navigate to
HKLM\SOFTWARE\VERITAS\VCS\BundledAgents.
3
Click Edit > New > Key and create a key by the name VMNSDg , if it does not
exist already.
4
Select the VMNSDg key and click Edit > New > Key and create a key by the
name <resource_name>.
Here <resource_name> should be the resource name of the VMNSDg resource.
The newly created registry key should look like this:
HKLM\SOFTWARE\VERITAS\VCS\BundledAgents\VMNSDg\<resource_name>
5
Select the key that you created in step 4 (<resource_name>) and add a
DWORD type of value.
The value name should be DgImportWaitTimeOut and value data should be
the desired timeout duration in seconds The value indicates the timeout interval
for which the VMNSDg agent waits for the all the disks to arrive.
6
If there are multiple service groups to be used in the non-shared storage
environment, repeat steps 4 and 5 for each VMNSDg resource that is configured
in the service group.
7
Save and exit the Registry Editor.
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Configuring resources and applications in VCS
About the VCS Application Manager utility
About the VCS Application Manager utility
VCS starts application services under the context of the respective virtual server
configured in the cluster. As the Windows MMC snap-in is not aware of the virtual
server configuration, it is not possible to manage the application from the MMC
snap-in.
VCS provides a utility, VCS Application Manager (VAM), that allows you to manage
applications in the virtual server context. You can use VAM to launch application
management tools and system management tools in the virtual server context.
VAM supports the following applications:
■
Microsoft Exchange Server 2007
■
Microsoft Distributed Transaction Coordinator (MSDTC)
■
Microsoft Message Queing (MSMQ)
Managing applications in virtual server context
Use the following steps to start application management tools in the virtual server
context using the VCS Application Manager utility.
Before you proceed, ensure that the virtual server resource (Lanman resource)
configured in the application service group is online on the node where you run the
VAM utility.
To manage applications in virtual server context
1
Start the VCS Application Manager utility.
Click Start > Programs > Symantec > Veritas Cluster Server > Configuration
Tools > Application Manager.
or, in case of SFW HA,
In the Solutions Configuration Center (SCC), under Tools, click VCS
Application Manager.
The VCS Application Manager displays a list of supported application service
groups configured in the cluster. For each service group it also displays the
state of the service group, the name of the virtual server resource (Lanman
resource) and the corresponding management tools used for that application.
2
If you wish to sort applications based on their resource type, select the desired
resource type from the Select the resource type drop-down list.
The following resource types are available for selection:
■
ExchService2007
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Configuring resources and applications in VCS
About testing resource failover using virtual fire drills
3
■
MSDTC
■
MSMQ
Select an application resource that is online and then click Manage, or
double-click the resource name.
VAM launches the management tool in the virtual server context. You can then
perform the desired tasks from the management tool.
For example, if you have selected an MSDTC resource, the Computer Services
snap-in is launched. You can view the distributed transactions on the virtual
DTC server.
To launch a different management tool than the one displayed, click the tool
name in the Managed Application column and then select the available tool
from the drop-down list.
Table 8-4displays the supported applications and the respective management
tools that are available.
Table 8-4
VAM: applications and tools available
Application (Resource type)
Management tools available
Exchange Server 2007
(ExchService2007)
Exchange Management Shell
You can launch the Exchange Management Shell and
run cmdlets to perform various administrative tasks on
the configured Exchange server.
Microsoft Distributed Transaction Component Services
Coordinator (MSDTC)
You can view the distributed transactions statistics on the
DTC virtual server from a node where the MSDTC
resource is online.
Microsoft Message Queuing
(MSMQ)
Computer Management, Performance Counters
You can manage MSMQ message queues on the node
where the MSMQ resource is online.
About testing resource failover using virtual fire drills
Configuring high availability for a database or an application requires several
infrastructure and configuration settings on multiple systems. However, cluster
environments are subject to change after the initial setup. Administrators add disks,
create new diskgroups and volumes, add new cluster nodes, or new NICs to upgrade
and maintain the infrastructure. Keeping the cluster configuration updated with the
changing infrastructure is critical.
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Configuring resources and applications in VCS
About testing resource failover using virtual fire drills
Virtual fire drills detect discrepancies between the VCS configuration and the
underlying infrastructure on a node; discrepancies that might prevent a service
group from going online on a specific node.
About virtual fire drills
The virtual fire drill feature uses the Action function associated with the agent. The
Action function of the supported agents are updated to support the virtual fire drill
functionality—running infrastructure checks and fixing specific errors.
The infrastructure check verifies the resources defined in the VCS configuration
file (main.cf) have the required infrastructure to fail over on another node. For
example, an infrastructure check for the MountV resource verifies the existence of
the mount point (drive letter) defined in the MountPath attribute for the resource.
You can run an infrastructure check only when the service group is online. The
check verifies that the specified node is a viable failover target capable of hosting
the service group.
The virtual fire drill provides an option to fix specific errors detected during the
infrastructure check.
About infrastructure checks and fixes for supported agents
Table 8-5 shows the infrastructure checks for different resource types.
Table 8-5
Infrastructure checks
Resource type
Infrastructure checks
Application
Is the specified Program available?
Does the specified Program have
execute permissions?
Does specified user exists on host?
Does the same binary exist on all
nodes?
DiskGroup
Is Veritas Volume Manager
licensed?
Are all disks in the diskgroup
visible from the host?
IP
Does a route exist to the IP from
the specified NIC?
Fix option
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About testing resource failover using virtual fire drills
Table 8-5
Infrastructure checks (continued)
Resource type
Infrastructure checks
Fix option
Mount
Does mount directory exist?
Create the mount directory.
Is some other filesystem mounted
at the specified mount directory?
NIC
Does the device exist on the host?
Process
Does the specified Program exist
and does it have execute
permissions?
Is the specified Program a binary
executable?
Does the same binary exist on all
nodes?
About running a virtual fire drill
You can run a virtual fire drill from the command line or from Cluster Manager (Java
Console).
See “Running HA fire drill from the Java Console” on page 166.
338
Chapter
9
Modifying the cluster
configuration
This chapter includes the following topics:
■
About modifying the cluster configuration
■
Adding nodes to a cluster
■
Removing nodes from a cluster
■
Reconfiguring a cluster
■
Configuring single sign-on for the cluster manually
■
Configuring the ClusterService group
■
Deleting a cluster configuration
About modifying the cluster configuration
This topic describes how to modify and delete a cluster configuration using the VCS
Cluster Configuration Wizard (VCW). The chapter also describes how to enable
and disable Veritas Security Services in clusters configured to run in secure mode.
Use the VCS Configuration Wizard to modify and delete a cluster configuration.
When used to modify a cluster configuration, the wizard performs the following
tasks:
■
Adds nodes to a cluster
■
Remove nodes from a cluster
■
Reconfigures the private network and LLT
■
Reconfigures Veritas Security Services
Modifying the cluster configuration
Adding nodes to a cluster
■
Configures the ClusterService service group in the cluster
When used to delete a cluster configuration, the wizard removes the cluster
components from the nodes; the wizard does not uninstall VCS.
Adding nodes to a cluster
Before adding a node to a cluster, install VCS on the node as follows:
■
In case of VCS for Windows, refer to the Veritas Cluster Server for Windows
Installation and Upgrade Guide.
■
In case of Storage Foundation and High Availability for Windows (SFW HA),
refer to the Veritas Storage Foundation and High Availability Solutions Installation
and Upgrade Guide.
The VCS Cluster Configuration Wizard (VCW) configures VCS components and
starts VCS services on the new node. The wizard does not configure any service
groups on the new node.
To add nodes to single node cluster without private link heartbeat configured, you
first must reconfigure the cluster to include the private links.
See “Reconfiguring a cluster” on page 346.
To add a node to a VCS cluster
1
Start the VCS Cluster Configuration wizard.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > Cluster Configuration Wizard.
Run the wizard from the node to be added or from a node in the cluster. The
node that is being added should be part of the domain to which the cluster
belongs.
2
Read the information on the Welcome panel and click Next.
3
On the Configuration Options panel, click Cluster Operations and click Next.
4
In the Domain Selection panel, select or type the name of the domain in which
the cluster resides and select the discovery options.
To discover information about all the systems and users in the domain, do the
following:
■
Clear the Specify systems and users manually check box.
■
Click Next.
Proceed to step 8.
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Modifying the cluster configuration
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To specify systems and user names manually (recommended for large
domains), do the following:
5
■
Check the Specify systems and users manually check box.
Additionally, you may instruct the wizard to retrieve a list of systems and
users in the domain by selecting appropriate check boxes.
■
Click Next.
If you chose to retrieve the list of systems, proceed to step 6. Otherwise
proceed to the next step.
On the System Selection panel, complete the following and click Next:
■
Type the name of an existing node in the cluster and click Add.
■
Type the name of the system to be added to the cluster and click Add.
If you specify only one node of an existing cluster, the wizard discovers all
nodes for that cluster. To add a node to an existing cluster, you must specify
a minimum of two nodes; one that is already a part of a cluster and the other
that is to be added to the cluster.
Proceed to step 8.
6
On the System Selection panel, specify the systems to be added and the nodes
for the cluster to which you are adding the systems.
Enter the system name and click Add to add the system to the Selected
Systems list. Alternatively, you can select the systems from the Domain
Systems list and click the right-arrow icon.
If you specify only one node of an existing cluster, the wizard discovers all
nodes for that cluster. To add a node to an existing cluster, you must specify
a minimum of two nodes; one that is already a part of a cluster and the other
that is to be added to the cluster.
7
The System Report panel displays the validation status, whether Accepted or
Rejected, of all the systems you specified earlier.
A system can be rejected for any of the following reasons:
■
The system does not respond to a ping request.
■
WMI access is disabled on the system.
■
The wizard is unable to retrieve information about the system's architecture
or operating system.
■
VCS is either not installed on the system or the version of VCS is different
from what is installed on the system on which you are running the wizard.
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Modifying the cluster configuration
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Click on a system name to see the validation details. If you wish to include a
rejected system, rectify the error based on the reason for rejection and then
run the wizard again.
Click Next to proceed.
8
On the Cluster Configuration Options panel, click Edit Existing Cluster and
click Next.
9
On the Cluster Selection panel, select the cluster to be edited and click Next.
If you chose to specify the systems manually in step 4, only the clusters
configured with the specified systems are displayed.
10 On the Edit Cluster Options panel, click Add Nodes and click Next.
In the Cluster User Information dialog box, type the user name and password
for a user with administrative privileges to the cluster and click OK.
The Cluster User Information dialog box appears only when you add a node
to a cluster with VCS user privileges (a cluster that is not a secure cluster).
11 On the Cluster Details panel, check the check boxes next to the systems to be
added to the cluster and click Next.
The right pane lists nodes that are part of the cluster. The left pane lists systems
that can be added to the cluster.
12 The wizard validates the selected systems for cluster membership. After the
nodes have been validated, click Next.
If a node does not get validated, review the message associated with the failure
and restart the wizard after rectifying the problem.
13 On the Private Network Configuration panel, configure the VCS private network
communication on each system being added and then click Next. How you
configure the VCS private network communication depends on how it is
configured in the cluster. If LLT is configured over Ethernet, you have to use
the same on the nodes being added. Similarly, if LLT is configured over UDP
in the cluster, you have use the same on the nodes being added.
Do one of the following:
■
To configure the VCS private network over Ethernet, do the following:
■
Select the check boxes next to the two NICs to be assigned to the private
network.
Symantec recommends reserving two NICs exclusively for the private
network. However, you could lower the priority of one NIC and use the
low-priority NIC for public and private communication.
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Modifying the cluster configuration
Adding nodes to a cluster
■
If you have only two NICs on a selected system, it is recommended that
you lower the priority of at least one NIC that will be used for private as
well as public network communication.
To lower the priority of a NIC, right-click the NIC and select Low Priority
from the pop-up menu.
Note: If you wish to use Windows NIC teaming, you must select the
Static Teaming mode. Only the Static Teaming mode is supported on
Windows Server 2012.
■
If your configuration contains teamed NICs, the wizard groups them as
"NIC Group #N" where "N" is a number assigned to the teamed NIC. A
teamed NIC is a logical NIC, formed by grouping several physical NICs
together. All NICs in a team have an identical MAC address. Symantec
recommends that you do not select teamed NICs for the private network.
The wizard configures the LLT service (over Ethernet) on the selected network
adapters.
To configure the VCS private network over the User Datagram Protocol (UDP)
layer, do the following:
■
■
Select the check boxes next to the two NICs to be assigned to the private
network. You can assign maximum eight network links. Symantec
recommends reserving at least two NICs exclusively for the VCS private
network. You could lower the priority of one NIC and use the low-priority
NIC for both public and private communication.
■
If you have only two NICs on a selected system, it is recommended that
you lower the priority of at least one NIC that will be used for private as
well as public network communication. To lower the priority of a NIC,
right-click the NIC and select Low Priority from the pop-up menu.
■
Specify a unique UDP port for each of the link. Click Edit Ports if you
wish to edit the UDP ports for the links. You can use ports in the range
49152 to 65535. The default ports numbers are 50000 and 50001
respectively. Click OK.
■
For each selected NIC, verify the displayed IP address. If a selected
NIC has multiple IP addresses assigned, double-click the field and
choose the desired IP address from the drop-down list. In case of IPv4,
each IP address can be in a different subnet.
The IP address is used for the VCS private communication over the
specified UDP port.
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Modifying the cluster configuration
Removing nodes from a cluster
■
For each selected NIC, double-click the respective field in the Link
column and choose a link from the drop-down list. Specify a different
link (Link1 or Link2) for each NIC. Each link is associated with a UDP
port that you specified earlier.
The wizard configures the LLT service (over UDP) on the selected network
adapters. The specified UDP ports are used for the private network
communication.
14 On the Public Network Communication panel, select a NIC for public network
communication, for each system that is being added, and then click Next.
This step is applicable only if you have configured the ClusterService service
group, and the system being added has multiple adapters. If the system has
only one adapter for public network communication, the wizard configures that
adapter automatically.
Note: If you wish to use Windows NIC teaming, you must select the Static
Teaming mode. Only the Static Teaming mode is supported on Windows Server
2012.
15 Specify the credentials for the user in whose context the VCS Helper service
runs.
16 Review the summary information and click Add.
17 The wizard starts running commands to add the node. After all commands
have been successfully run, click Finish.
Removing nodes from a cluster
This topic describes how to remove nodes from a multiple node VCS cluster. To
remove a node from a single node cluster, you must delete the cluster.
See “Deleting a cluster configuration” on page 356.
To remove nodes from a cluster
1
Verify that no service groups are online on the node to be removed.
2
Remove the node from the SystemList of all service groups.
3
Start the VCS Configuration wizard.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > Cluster Configuration Wizard.
4
Read the information on the Welcome panel and click Next.
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Modifying the cluster configuration
Removing nodes from a cluster
5
In the Configuration Options panel, click Cluster Operations and click Next.
6
In the Domain Selection panel, select or type the name of the domain in which
the cluster resides and select the domain discovery options.
To discover information about all the systems and users in the domain:
■
Uncheck the Specify systems and users manually check box.
■
Click Next.
■
Proceed to step 10.
To specify systems and user names manually (recommended for large
domains):
7
■
Check the Specify systems and users manually check box.
Additionally, you may instruct the wizard to retrieve a list of systems and
users in the domain by selecting appropriate check boxes.
■
Click Next.
■
If you checked Retrieve system list from domain, proceed to step 8.
Otherwise proceed to the next step.
In the System Selection panel, type the name of the system and click Add.
Proceed to step 10.
8
In the System Selection panel, specify the systems for the cluster from which
you will be removing the nodes.
Enter the system name and click Add to add the system to the Selected
Systems list. Alternatively, you can select the systems from the Domain
Systems list and click the right-arrow icon.
If you specify only one node of an existing cluster, the wizard discovers all
nodes for that cluster.
9
The System Report panel displays the validation status, whether Accepted or
Rejected, of all the systems you specified earlier.
A system can be rejected for any of the following reasons:
■
The system does not respond to a ping request.
■
WMI access is disabled on the system.
■
The wizard is unable to retrieve information about the system's architecture
or operating system.
■
VCS is either not installed on the system or the version of VCS is different
from what is installed on the system on which you are running the wizard.
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Modifying the cluster configuration
Reconfiguring a cluster
Click on a system name to see the validation details. If you wish to include a
rejected system, rectify the error based on the reason for rejection and then
run the wizard again.
Click Next to proceed.
10 In the Cluster Configuration Options panel, click Edit Existing Cluster and
then click Next.
11 In the Cluster Selection panel, select the cluster to be edited and click Next.
If you chose to specify the systems manually in step 6, only the clusters
configured with the specified systems are displayed.
12 In the Edit Cluster Options panel, click Remove Nodes and then click Next.
In the Cluster User Information panel, enter the user name and password for
a user with administrative privileges to the cluster and click OK.
The Cluster User Information dialog box appears only when you remove a
node from a non-secure cluster.
13 In the Cluster Details panel, select the check boxes next to the nodes to be
removed and click Next.
See “Reconfiguring a cluster” on page 346.
14 If you want to remove the VCS Helper Service user account from the
administrative group of the nodes being removed from the cluster, click Yes
from the informational dialog box. Otherwise, click No.
15 The wizard validates the selected nodes. After the nodes have been validated,
click Next. If a node does not get validated, review the message associated
with the failure and restart the wizard after rectifying the problem.
An informational dialog box appears if you are removing all but one nodes of
a multiple node cluster. In the dialog box, specify whether you want to retain
or remove the private link heartbeat.
16 Review the summary information and click Remove.
The wizard starts running commands to remove the node from the cluster.
17 After the commands have been successfully run, click Finish.
Reconfiguring a cluster
You may need to reconfigure your cluster after changing an adapter on a cluster
node, to update the LLT information, or to configure Veritas Security Services.
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Modifying the cluster configuration
Reconfiguring a cluster
To reconfigure a cluster
1
Start the VCS Configuration wizard.
Click Start > All Programs > Symantec > Veritas Cluster Server>
Configuration Tools > Cluster Configuration Wizard.
2
Read the information on the Welcome panel and click Next.
3
In the Configuration Options panel, click Cluster Operations and click Next.
4
In the Domain Selection panel, select or type the name of the domain in which
the cluster resides and click Next.
To discover information about all the systems and users in the domain
■
Uncheck the Specify systems and users manually check box.
■
Click Next.
■
Proceed to step 8.
To specify systems and user names manually (recommended for large domains)
5
■
Check the Specify systems and users manually check box.
Additionally, you may instruct the wizard to retrieve a list of systems and
users in the domain by selecting appropriate check boxes.
■
Click Next.
■
If you checked Retrieve system list from domain, proceed to step 6.
Otherwise proceed to the next step.
In the System Selection panel, type the name of the system and click Add.
Proceed to step 8.
6
In the System Selection panel, specify the systems for the cluster to be
reconfigured.
Enter the system name and click Add to add the system to the Selected
Systems list. Alternatively, you can select the systems from the Domain Systems
list and click the right-arrow icon.
If you specify only one node of an existing cluster, the wizard discovers all
nodes for that cluster.
7
The System Report panel displays the validation status, whether Accepted or
Rejected, of all the systems you specified earlier.
A system can be rejected for any of the following reasons:
■
The system does not respond to a ping request.
■
WMI access is disabled on the system.
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Modifying the cluster configuration
Reconfiguring a cluster
■
The wizard is unable to retrieve information about the system's architecture
or operating system.
■
VCS is either not installed on the system or the version of VCS is different
from what is installed on the system on which you are running the wizard.
Click on a system name to see the validation details. If you wish to include a
rejected system, rectify the error based on the reason for rejection and then
run the wizard again.
Click Next to proceed.
8
In the Cluster Configuration Options panel, click Edit Existing Cluster and
click Next.
9
In the Cluster Selection panel, select the cluster to be reconfigured and click
Next. If you chose to specify the systems manually in step 4, only the clusters
configured with the specified systems are displayed.
10 In the Edit Cluster Options panel, click Reconfigure and click Next.
In the Cluster User Information dialog box, enter the user name and password
for a user with administrative privileges to the cluster and click OK.
The Cluster User Information dialog box appears only when you reconfigure
a non-secure cluster.
11 In the second Edit Cluster Options dialog box, select any of the following options
and click Next:
■
Change private network heartbeat links
Select this option to change the private network heartbeat links. If the
selected cluster is a single node cluster, the option is to remove the private
heartbeat links.
If the cluster has more than one node, the options are to add or remove
private heartbeat links.
See step 12.
■
Change HAD Helper User account
Selection this options to change the user account for the Veritas Cluster
Server Helper service.
See step 13.
■
Configure VCS Authentication Service
Select this option to configure the VCS authentication service for single
sign-on. Single sign-on configures a secure cluster.
12 If the option to change the private network heartbeat links was selected, do
one of the following:
■
To configure the VCS private network over Ethernet, do the following:
348
Modifying the cluster configuration
Reconfiguring a cluster
■
Select the check boxes next to the two NICs to be assigned to the private
network.
Symantec recommends reserving two NICs exclusively for the private
network. However, you could lower the priority of one NIC and use the
low-priority NIC for public and private communication.
■
If you have only two NICs on a selected system, it is recommended that
you lower the priority of at least one NIC that will be used for private as
well as public network communication.
To lower the priority of a NIC, right-click the NIC and select Low Priority
from the pop-up menu.
Note: If you wish to use Windows NIC teaming, you must select the
Static Teaming mode. Only the Static Teaming mode is supported on
Windows Server 2012.
■
If your configuration contains teamed NICs, the wizard groups them as
"NIC Group #N" where "N" is a number assigned to the teamed NIC. A
teamed NIC is a logical NIC, formed by grouping several physical NICs
together. All NICs in a team have an identical MAC address. Symantec
recommends that you do not select teamed NICs for the private network.
The wizard will configure the LLT service (over Ethernet) on the selected
network adapters.
■
To configure the VCS private network over the User Datagram Protocol
(UDP) layer, do the following:
■
Select Configure LLT over UDP on IPv4 network or Configure LLT
over UDP on IPv6 network depending on how LLT is configured on
the existing nodes in the cluster.
■
Select the check boxes next to the NICs to be assigned to the private
network. You can assign maximum eight network links.
Symantec recommends reserving two NICs exclusively for the VCS
private network.
■
If you have only two NICs on a selected system, it is recommended that
you lower the priority of at least one NIC that will be used for private as
well as public network communication.
To lower the priority of a NIC, right-click the NIC and select Low Priority
from the pop-up menu.
■
Specify a unique UDP port for each of the link. Click Edit Ports if you
wish to edit the UDP ports for the links. The default ports numbers are
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Modifying the cluster configuration
Configuring single sign-on for the cluster manually
50000 to 50007. You can use ports in the range 49152 to 65535. Click
OK.
■
For each selected NIC, verify the displayed IP address. If a selected
NIC has multiple IP addresses assigned, double-click the field and
choose the desired IP address from the drop-down list. In case of IPv4,
each IP address can be in a different subnet.
The IP address is used for the VCS private communication over the
specified UDP port.
■
For each selected NIC, double-click the respective field in the Link
column and choose a link from the drop-down list. Specify a different
link (Link1 or Link2) for each NIC. Each link is associated with a UDP
port that you specified earlier.
The wizard configures the LLT service (over UDP) on the selected network
adapters. The specified UDP ports are used for the private network
communication.
13 If the option to change the VCS HAD Helper User account was selected, in
the VCS Helper Service User Account dialog box, specify the name of a domain
user in whose context the VCS Helper service will run.
The VCS High Availability Daemon, which runs in the context of the local system
built-in account, uses the VCS Helper Service user context to access the
network.
■
Select one of the following:
■
Enter a valid user name for the selected account and click Next.
Do not append the domain name to the user name; do not enter user names
as DOMAIN\user or user@DOMAIN.
■
Enter a password for the selected account and click OK.
14 Review the summary information and click Reconfigure.
15 The wizard starts running commands to apply the changes. After all services
have been successfully configured, click Finish.
Configuring single sign-on for the cluster manually
This topic describes how you can manually configure single sign-on for the cluster.
In a secure cluster, the VCS Authentication Service is used to secure communication
between cluster nodes and clients, including the Cluster Manager (Java Console),
by using digital certificates for authentication and SSL to encrypt communication
over the public network. VCS uses SSL encryption and platform-based
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Modifying the cluster configuration
Configuring single sign-on for the cluster manually
authentication. The VCS high availability engine (HAD) and Veritas Command
Server run in secure mode.
Symantec recommends that you use the Cluster Configuration Wizard (VCW) to
perform this task.
See “Reconfiguring a cluster” on page 346.
To create a secure cluster manually
1
Stop VCS on all nodes:
Type the following at the command prompt on one of the cluster nodes:
C:\>hastop -all
2
Stop the Veritas Command Server service on all nodes.
Type the following at the command prompt on all the cluster nodes:
C:\>net stop cmdserver
3
On each node in the cluster, create an empty file with the name .secure under
%VCS_HOME%\conf\config directory.
Here, %VCS_HOME% represents the VCS installation directory, typically
C:\Program Files\Veritas\Cluster Server.
4
Start the Veritas Command Server service on all nodes.
Type the following at the command prompt on all the cluster nodes:
C:\>net start cmdserver
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Modifying the cluster configuration
Configuring the ClusterService group
5
On one of the cluster nodes, set the SecureClus attribute to 1 in the cluster
configuration file.
Set the SecureClus attribute to 1 in the cluster configuration file main.cf.
Open the configuration file main.cf using Notepad, and add the following line
in the cluster definition:
SecureClus = 1
For example:
cluster VCSCluster9495 (
UserNames = { admin = gmnFmhMjnInnLvnHmk }
Administrators = { admin }
SecureClus = 1
CredRenewFrequency = 0
CounterInterval = 5
)
6
Save and close the configuration file.
7
Start the VCS engine on the node where you modified the cluster configuration
file.
Type the following on the command prompt:
C:\>hastart
8
Start VCS on other nodes in the cluster.
Type the following on the command prompt on one of the cluster nodes:
C:\>hastart -all
Configuring the ClusterService group
Use the VCS Configuration wizard to configure the following ClusterService service
group components, if you did not configure them during the initial cluster
configuration:
■
Notification
■
GCO Option for inter-cluster communication for global clusters
Note that the wizard allows you to configure each component only once.
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Configuring the ClusterService group
To configure the ClusterService group
1
Start the VCS Configuration wizard.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > Cluster Configuration Wizard.
2
Read the information on the Welcome panel and click Next.
3
In the Configuration Options panel, click Cluster Operations and click Next.
4
In the Domain Selection panel, select or type the name of the domain in which
the cluster resides and click Next.
To discover information about all the systems and users in the domain
■
Clear the Specify systems and users manually check box.
■
Click Next.
■
Proceed to step 7.
To specify systems and user names manually (recommended for large domains)
5
■
Check the Specify systems and users manually check box.
Additionally, you may instruct the wizard to retrieve a list of systems and
users in the domain by selecting appropriate check boxes.
■
Click Next.
■
If you checked the Retrieve system list from domain check box, proceed
to step 6. Otherwise proceed to the next step.
In the System Selection panel, type the name of the system and click Add.
Proceed to step 7.
6
In the System Selection panel, specify the systems for the cluster where you
will be configuring the ClusterService group.
Enter the system name and click Add to add the system to the Selected
Systems list. Alternatively, you can select the systems from the Domain
Systems list and click the right-arrow icon.
If you specify only one node of an existing cluster, the wizard will discover all
the nodes for that cluster.
7
In the Cluster Configuration Options panel, click Edit Existing Cluster and
then click Next.
8
In the Cluster Selection panel, select the cluster to be edited and click Next.
If you chose to specify the systems manually in 4, only the clusters configured
with the specified systems are displayed.
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Configuring the ClusterService group
9
In the Edit Cluster Options panel, click Configure ClusterService Options
and then click Next.
In the Cluster User Information dialog box, enter the user name and password
for a user with administrative privileges to the cluster and click OK.
The Cluster User Information dialog box appears only when you configure a
ClusterService group in a non-secure cluster.
10 In the Cluster Service Components panel, select from the following components
to be configured in the ClusterService service group and then click Next.
■
Check the Notifier Option check box to configure notification of important
events to designated recipients.
See “Configuring notification” on page 354.
■
Check the GCO Option check box to configure the wide-area connector
(WAC) process for global clusters. The WAC process is required for
inter-cluster communication.
See “Configuring the wide-area connector process for global clusters”
on page 356.
Configuring notification
This topic describes how to configure the notifier resource.
To configure notification
1
On the Notifier Options panel, specify the mode of notification to be configured
and click Next.
You can configure VCS to generate SNMP (V2) traps on a designated server
and send emails to designated recipients in response to certain events.
2
If you chose to configure SNMP, specify information about the SNMP console
and click Next.
Configure the SNMP console as follows:
3
■
Click a field in the SNMP Console column and type the name or IP address
of the console. The specified SNMP console must be MIB 2.0 compliant.
■
Click the corresponding field in the Severity column and select a severity
level for the console.
■
Click + to add a field; click - to remove a field.
■
Enter an SNMP trap port. The default value is 162.
If you chose to configure SMTP server, specify information about SMTP
recipients and click Next.
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Configuring the ClusterService group
Configure the SMTP server as follows:
4
■
Type the name of the SMTP server.
■
Click a field in the Recipients column and enter a recipient for notification.
Enter recipients as admin@example.com.
■
Click the corresponding field in the Severity column and select a severity
level for the recipient. VCS sends messages of an equal or higher severity
to the recipient.
■
Click + to add fields; click - to remove a field.
On the Notifier Network Card Selection panel, specify the network information
and click Next.
Specify the network information on the Notifier Network Card Selection panel
as follows:
■
If the cluster has a ClusterService service group configured, you can use
the NIC resource configured in the service group or configure a new NIC
resource for notification.
■
If you choose to configure a new NIC resource, select a network adapter
for each node in the cluster. Note that the wizard lists the public network
adapters along with the adapters that were assigned a low priority.
5
Review the summary information and choose whether you want to bring the
notification resources online when VCS is started and click Configure.
6
If you are done with the configuration, click Finish to exit the wizard.
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Deleting a cluster configuration
Configuring the wide-area connector process for global clusters
This topic describes how to configure wide-area connector resource for global
clusters.
To configure the wide-area connector process for global clusters
1
On the GCO Network Selection panel, specify the network information and
click Next.
If the cluster has a ClusterService group configured, you can use the IP address
configured in the service group or configure a new IP address.
Do the following:
■
To specify an existing IP address, select Use existing IP resource and
then select the IP address from the drop-down list.
■
To use a new IP address, do the following:
■
■
In case of IPv4, select IPV4 and then enter the IP address and
associated subnet mask. Make sure that the specified IP address has
a DNS entry.
■
In case of IPv6, select IPV6 and select the IPv6 prefix from the
drop-down list.
The wizard uses the prefix and automatically generates a unique IPv6
address that is valid on the network. The IPv6 option is disabled if the
network does not support IPv6.
Select a network adapter for each node in the cluster. The wizard lists the
public network adapters along with the adapters that were assigned a low
priority.
2
Review the summary information and choose whether you want to bring the
resources online when VCS starts and click Configure.
3
Click Finish to exit the wizard.
The wizard does not set up a global cluster environment; it configures a
resource for the wide-area connector, which is required for inter-cluster
communication.
For instructions on setting up a global cluster environment:
See “Setting up a global cluster” on page 472.
Deleting a cluster configuration
This topic describes how to delete a cluster configuration.
356
Modifying the cluster configuration
Deleting a cluster configuration
To delete a cluster configuration
1
Start the VCS Configuration wizard.
Click Start > All Programs > Symantec > Veritas Cluster Server >
Configuration Tools > Cluster Configuration Wizard.
2
Read the information on the Welcome panel and click Next.
3
In the Configuration Options panel, click Cluster Operations and click Next.
4
In the Domain Selection panel, select or type the name of the domain in which
the cluster resides and click Next.
To discover information about all the systems and users in the domain
■
Uncheck the Specify systems and users manually check box.
■
Click Next.
Proceed to step 7.
To specify systems and user names manually (recommended for large domains)
5
■
Check the Specify systems and users manually check box.
■
Additionally, you may instruct the wizard to retrieve a list of systems and
users in the domain by selecting appropriate check boxes.
■
Click Next.
If you checked the Retrieve system list from domain check box, proceed
to step 6. Otherwise proceed to the next step.
In the System Selection panel, type the name of the system and click Add.
Proceed to step 7.
6
In the System Selection panel, specify the nodes of the cluster to be deleted.
Enter the system name and click Add to add the system to the Selected
Systems list. Alternatively, you can select the systems from the Domain Systems
list and click the right-arrow icon.
If you specify only one node of an existing cluster, VCW discovers all nodes
for that cluster.
7
In the Cluster Configuration Options panel, click Delete Cluster and then click
Next.
8
In the Cluster Selection panel, select the cluster whose configuration is to be
deleted and click Next.
If you chose to specify the systems manually in step 4, only the clusters
configured with the specified systems are displayed.
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Modifying the cluster configuration
Deleting a cluster configuration
9
If you want to remove the VCS Helper Service user account from the
administrative group of the all the nodes in the cluster, click Yes from the
informational dialog box. Otherwise, click No.
10 In the Cluster User Information panel, enter the user name and password for
a user with administrative privileges to the cluster and click OK.
The Cluster User Information dialog box appears only when you delete a
non-secure cluster.
11 Review the summary information and click Unconfigure.
12 The wizard starts running commands to remove the configuration from the
cluster. After all commands have been successfully run, click Finish.
VCW removes the cluster configuration; VCW does not unconfigure the VCS
Authentication Service or uninstall the product from the systems.
358
Chapter
10
Predicting VCS behavior
using VCS Simulator
This chapter includes the following topics:
■
About VCS Simulator
■
Simulator ports
■
Administering VCS Simulator from the Java Console
■
Administering VCS Simulator from the command line interface
About VCS Simulator
VCS Simulator enables you to simulate and test cluster configurations. Use VCS
Simulator to view and modify service group and resource configurations and test
failover behavior. VCS Simulator can be run on a stand-alone system and does not
require any additional hardware.
VCS Simulator runs an identical version of the VCS High Availability Daemon (HAD)
as in a cluster, ensuring that failover decisions are identical to those in an actual
cluster.
You can test configurations from different operating systems using VCS Simulator.
The VCS simulator can run only on Windows systems. However, it can simulate
non-Windows operating systems on a Windows system. For example, you can run
VCS Simulator on a Windows system and test VCS configurations for Windows,
Linux, Solaris, HP-UX, and AIX clusters. VCS Simulator also enables creating and
testing global clusters.
You can administer VCS Simulator from the Java Console or from the command
line.
Predicting VCS behavior using VCS Simulator
Simulator ports
To download VCS Simulator, go to http://go.symantec.com/vcsm_download.
Simulator ports
Table 10-1 lists the ports that VCS Simulator uses to connect to the various cluster
configurations. You can modify cluster configurations to adhere to your network
policies. Also, Symantec might change port assignments or add new ports based
on the number of simulator configurations.
Table 10-1
Simulator ports
Port
Usage
15552
SOL_ORA_SRDF_C1:simulatorport
15553
SOL_ORA_SRDF_C2:simulatorport
15554
SOL_ORACLE:simulatorport
15555
LIN_NFS:simulatorport
15556
HP_NFS:simulatorport
15557
AIX_NFS:simulatorport
15558
Consolidation:simulatorport
15559
SOL_NPLUS1:simulatorport
15572
AcmePrimarySite:simulatorport
15573
AcmeSecondarySite:simulatorport
15580
Win_Exch_2K7_primary:simulatorport
15581
Win_Exch_2K7_secondary:simulatorport
15582
WIN_NTAP_EXCH_CL1:simulatorport
15583
WIN_NTAP_EXCH_CL2:simulatorport
15611
WIN_SQL2K5_VVR_C1:simulatorport
15612
WIN_SQL2K5_VVR_C2:simulatorport
15613
WIN_SQL2K8_VVR_C1:simulatorport
15614
WIN_SQL2K8_VVR_C2:simulatorport
15615
WIN_E2K10_VVR_C1:simulatorport
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Administering VCS Simulator from the Java Console
Table 10-1
Simulator ports (continued)
Port
Usage
15616
WIN_E2K10_VVR_C2:simulatorport
Table 10-2 lists the ports that the VCS Simulator uses for the wide area connector
(WAC) process. Set the WAC port to -1 to disable WAC simulation.
Table 10-2
WAC ports
Port
Usage
15562
SOL_ORA_SRDF_C1:wacport
15563
SOL_ORA_SRDF_C2:wacport
15566
Win_Exch_2K7_primary:wacport
15567
Win_Exch_2K7_secondary:wacport
15570
WIN_NTAP_EXCH_CL1:wacport
15571
WIN_NTAP_EXCH_CL2:wacport
15582
AcmePrimarySite:wacport
15583
AcmeSecondarySite:wacport
15661
WIN_SQL2K5_VVR_C1:wacport
15662
WIN_SQL2K5_VVR_C2:wacport
15663
WIN_SQL2K8_VVR_C1:wacport
15664
WIN_SQL2K8_VVR_C2:wacport
15665
WIN_E2K10_VVR_C1:wacport
15666
WIN_E2K10_VVR_C2:wacport
Administering VCS Simulator from the Java Console
The Simulator Console enables you to start, stop, and manage simulated clusters.
Figure 10-1 shows the Symantec Veritas Cluster Server Simulator Cluster View
that lists all simulated clusters.
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Administering VCS Simulator from the Java Console
Figure 10-1
Symantec Veritas Cluster Server Simulator Cluster View
The console provides two views:
■
Cluster View—Lists all simulated clusters.
■
Global View—Lists global clusters.
Through the Java Console, VCS Simulator enables you to configure a simulated
cluster panel, bring a system in an unknown state into a RUNNING state, simulate
power loss for running systems, simulate resource faults, and save the configuration
while VCS is offline. For global clusters, you can simulate the process of generating
and clearing cluster faults.
You can run multiple simulated clusters on a system by using different port numbers
for each cluster.
The Java Console provides the same views and features that are available for
online configurations.
See “About the Cluster Manager (Java Console)” on page 101.
Starting VCS Simulator from the Java Console
This topic describes how to start VCS stimulator from the Java Console.
To start VCS Simulator from the Java Console (Windows)
◆
Click Start > Programs > Symantec > Veritas VCS Simulator - Java Console.
Creating a simulated cluster
You can start a sample cluster configuration or create a new simulated cluster.
See “Creating a simulated cluster” on page 362.
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Administering VCS Simulator from the Java Console
To create a simulated cluster
1
In the Simulator console, click Add Cluster.
2
In the Add Cluster dialog box, do the following:
■
Enter a name for the new cluster.
■
Accept the suggested system name or enter a new name for a system in
the cluster.
■
Enter a unique port number for the simulated cluster.
■
Select the platform for the cluster nodes.
■
If the cluster is part of a global cluster configuration, select the Enable
Global Cluster Option check box and enter a unique port number for the
wide-area connector (WAC) process.
■
Click OK.
VCS creates a simulated one-node cluster and creates a new directory for the
cluster’s configuration files. VCS also creates a user called admin with Cluster
Administrator privileges. You can start the simulated cluster and administer it
by launching the Java Console.
Adding VCS type definitions
You must add the VCS type definitions by using the Cluster Manager (Java Console)
before you attempt to load templates in Windows simulated clusters.
To add VCS type definitions
1
From the Start menu, click Start > All Programs > Symantec > Veritas Cluster
Server > Veritas Cluster Manager - Java Console to start the Cluster Monitor.
2
Log on to the simulated cluster.
3
From the Cluster Explorer, click File > Import Types.
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Administering VCS Simulator from the Java Console
4
Click Yes in the dialog box that prompts you to switch the configuration to
read/write mode.
5
In the Import Type dialog box, navigate to
%vcs_simulator_home%/conf/types/w2k directory and select LDMtypes.cf
and click Import.
The variable %vcs_simulator_home% is the path where the VCS Simulator is
installed, typically C:\Program Files\Veritas\VCS Simulator.
6
Repeat step 5 and add SFWTypes.cf.
Deleting a cluster
Deleting a simulated cluster removes all configuration files that are associated with
the cluster. Before deleting a cluster, make sure that the cluster is not configured
as a global cluster. You can delete global clusters from the Global View.
To delete a simulated cluster
1
From Simulator Explorer, select the cluster and click Delete Cluster.
2
In the confirmation dialog box, click Yes.
Starting a simulated cluster
Start the cluster to begin administering it.
To start a simulated cluster
1
In the Simulator console, select the cluster.
2
Click Start Cluster.
3
After the cluster starts, click Launch Console to administer the cluster.
4
Enter a valid user name and password to log on to the cluster.
VCS Simulator does not validate passwords; you can log on to a simulated
cluster by entering a valid VCS user name. If you use the default configuration,
enter admin for the user name and any non-blank value for password.
Cluster Explorer is launched upon initial logon, and the icons in the cluster
panel change color to indicate an active panel.
Verifying a simulated cluster configuration
Verify that the configuration is valid.
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To verify the simulated cluster configuration
1
In the Simulator console, select the cluster.
2
Click Verify Configuration.
Simulating a global cluster configuration
Simulate a global cluster environment to test your global cluster configuration.
See “ How VCS global clusters work” on page 463.
To simulate a global cluster configuration
1
Create the simulated clusters for the global configuration.
See “Creating a simulated cluster” on page 362.
Select the Enable Global Cluster Option check box and enter a unique port
number for the wide-area connector (WAC) process.
2
In the Simulator console, click Make Global.
3
In the Make Global Configuration dialog box, do the following:
■
Select an existing global cluster or enter the name for a new global cluster.
■
From the Available Clusters list, select the clusters to add to the global
cluster and click the right arrow. The clusters move to the Configured
Clusters list.
■
Click OK.
Bringing a system up
Bring a system up to simulate a running system.
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Administering VCS Simulator from the Java Console
To bring a system up
1
From Cluster Explorer, click the Systems tab of the configuration tree.
2
Right-click the system in an unknown state, and click Up.
Powering off a system
This topic describes how to power off a system.
To power off a system
1
From Cluster Explorer, click the Systems tab of the configuration tree.
2
Right-click the online system, and click Power Off.
Saving the offline configuration
This topic describes how to save the offline configuration:
To save the offline configuration
1
From Cluster Explorer, click Save Configuration As from the File menu.
2
Enter the path location.
3
Click OK.
Simulating a resource fault
Use VCS Simulator to imitate a resource fault.
To simulate a resource fault
1
From Cluster Explorer, click the Service Groups tab of the configuration tree.
2
Right-click an online resource, click Fault Resource, and click the system
name.
Simulating cluster faults in global clusters
Use VCS Simulator to imitate the process of generating and clearing cluster faults.
See “Monitoring alerts” on page 178.
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Predicting VCS behavior using VCS Simulator
Administering VCS Simulator from the Java Console
To simulate a cluster fault
1
From Cluster Explorer, click the cluster in the configuration tree.
2
Right-click the cluster, click Fault Cluster, and click the cluster name.
If any Cluster Explorer windows are open for the cluster being faulted, these
become inoperative for a short period during which the Cluster Monitor tries
to connect to the simulated High Availability Daemon for the cluster. Following
this, an alert message appears and the Cluster Explorer windows close on
their own.
When a faulted cluster is brought up, its fault is automatically cleared. In case
of a GCO configuration, the Remote Cluster status is also automatically
updated. Hence there is no need to clear the cluster fault.
Simulating failed fire drills
Use VCS Simulator to demonstrate a failed fire drill.
The following simulated clusters have fire drill service groups:
■
SOL_ORA_SRDF_C2 (firedrill group is OracleGrp_fd)
■
WIN_SQL_VVR_C2 (firedrill group is SQLPROD_fd)
■
Win_Exch_2k3_Secondary (firedrill group is sample_fd)
See “About setting up a disaster recovery fire drill” on page 485.
To simulate a failed fire drill
1
Start Cluster Explorer and click the cluster in which you want to simulate the
fire drill.
2
Select the FireDrill service group from the Tree View, and then select the
Properties Tab in the right pane.
3
Click Show all attributes. Scroll down to choose the Tag attribute and
double-click to edit the attribute value.
4
If prompted, switch the configuration to the read-write mode.
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Administering VCS Simulator from the command line interface
5
In the Edit Attribute window, set the value of the Tag attribute to the name of
a critical resource in the FireDrill Service Group.
The Tag attribute values for service groups SQLPROD_fd (in cluster
WIN_SQL_VVR_C2) and sample_fd (in cluster Win_Exch_2K3_secondary)
should be blank before these modifications.
For the SQLPROD_fd fire-drill service group, set the attribute value to the name
of the SQL Server instance - SQLServer2000-VSQL01_fd.
You do not need to change the attribute value for the Oracle group; by default,
the Tag attribute of the OracleGrp_fd is set to the name of a critical resource.
6
Try to bring the FireDrill service group up. Right-click the service group in the
Cluster Explorer and bring it online on a specified system. The FireDrill service
group faults.
To simulate a successful fire drill, keep the Tag attribute of the fire drill service
group blank and bring the Firedrill service group online.
Administering VCS Simulator from the command line
interface
Start VCS Simulator on a Windows system before creating or administering
simulated clusters.
Note: VCS Simulator treats clusters that are created from the command line and
the Java Console separately. Hence, clusters that are created from the command
line are not visible in the graphical interface. If you delete a cluster from the
command line, you may see the cluster in the Java Console.
Starting VCS Simulator from the command line interface
This topic describes how to start VCS simulator from the command line:
To start VCS Simulator from the command line (Windows)
VCS Simulator installs platform-specific types.cf files at the path
%VCS_SIMULATOR_HOME%\types\. The variable %VCS_SIMULATOR_HOME%
represents the Simulator installation directory, typically C:\Program Files\Veritas\VCS
Simulator\.
Example: C:\DOS>set %VCS_SIMULATOR_HOME%=C:\Program Files\Veritas\VCS
Simulator\
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Administering VCS Simulator from the command line interface
1
To simulate a cluster running a particular operating system, copy the types.cf.
file for the operating system from the types directory to
%VCS_SIMULATOR_HOME%\default_clus\conf\config\.
2
Add custom type definitions to the file, if required, and rename the file to
types.cf.
3
Add VCS type definitions to the simulated cluster.
See “Adding VCS type definitions” on page 363.
4
If you have a main.cf file to run in the simulated cluster, copy it to
%VCS_SIMULATOR_HOME%\default_clus\conf\config\.
5
Start VCS Simulator:
%VCS_SIMULATOR_HOME%\bin> hasim -start system_name
The variable system_name represents a system name, as defined in the
configuration file main.cf.
This command starts Simulator on port 14153.
6
Add systems to the configuration, if desired:
%VCS_SIMULATOR_HOME%\bin> hasim -sys -add system_name
%VCS_SIMULATOR_HOME%\bin> hasim -up system_name
7
Verify the state of each node in the cluster:
%VCS_SIMULATOR_HOME%\bin> hasim -sys -state
See “To simulate global clusters from the command line” on page 370.
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370
To simulate global clusters from the command line
1
Install VCS Simulator in a directory (%VCS_SIMULATOR_HOME%) on your
system.
See the section Installing VCS Simulator in the Veritas Cluster Server
Installation Guide.
2
Set up the clusters on your system. Run the following command to add a cluster:
%VCS_SIMULATOR_HOME%\bin> hasim -setupclus new_clustername -simport
port_no -wacport port_no
Do not use default_clus as the cluster name when simulating a global cluster.
VCS Simulator copies the sample configurations to the path
%VCS_SIMULATOR_HOME%\clustername and creates a system named
clustername_sys1.
For example, to add cluster clus_a using ports 15555 and 15575, run the
following command:
%VCS_SIMULATOR_HOME%\bin> hasim -setupclus clus_a -simport 15555
-wacport 15575
Similarly, add the second cluster:
%VCS_SIMULATOR_HOME%\bin> hasim -setupclus clus_b -simport 15556
-wacport 15576
To create multiple clusters without simulating a global cluster environment,
specify -1 for the wacport.
3
Start the simulated clusters:
%VCS_SIMULATOR_HOME%\bin> hasim -start clustername_sys1
-clus clustername
4
Set the following environment variables to access VCS Simulator from the
command line:
■
set %VCS_SIM_PORT%=port_number
■
set %VCS_SIM_WAC_PORT%=wacport
Note that you must set these variables for each simulated cluster, otherwise
Simulator always connects default_clus, the default cluster.
You can use the Java Console to link the clusters and to configure global
service groups.
Predicting VCS behavior using VCS Simulator
Administering VCS Simulator from the command line interface
See “About the Cluster Manager (Java Console)” on page 101.
You can also edit the configuration file main.cf manually to create the global
cluster configuration.
Administering simulated clusters from the command line
The functionality of VCS Simulator commands mimic that of standard ha commands.
Table 10-3 describes the VCS simulator commands:
Table 10-3
VCS simulator commands
Command
Description
hasim -start
system_name
Starts VCS Simulator. The variable system_name
represents the system that will transition from the
LOCAL_BUILD state to the RUNNING state.
hasim -setupclus
clustername -simport
port_no [-wacport
port_no] [-sys
systemname]
Creates a simulated cluster and associates the specified
ports with the cluster.
hasim -deleteclus
<clus>
Deletes the specified cluster. Deleting the cluster removes
all files and directories associated with the cluster.
Before deleting a cluster, make sure the cluster is not
configured as a global cluster.
hasim -start
Starts VCS Simulator on the cluster specified by
clustername_sys1 [-clus clustername.
clustername]
If you start VCS Simulator with the -disablel10n option,
[-disablel10n]
the simulated cluster does not accept localized values for
attributes. Use this option when simulating a UNIX
configuration on a Windows system to prevent potential
corruption when importing the simulated configuration to a
UNIX cluster.
hasim -stop
Stops the simulation process.
hasim -poweroff
system_name
Gracefully shuts down the system.
hasim -up system_name
Brings the system up.
371
Predicting VCS behavior using VCS Simulator
Administering VCS Simulator from the command line interface
Table 10-3
VCS simulator commands (continued)
Command
Description
hasim -fault
system_name
resource_name
Faults the specified resource on the specified system.
hasim -faultcluster
clustername
Simulates a cluster fault.
hasim -clearcluster
clustername
Clears a simulated cluster fault.
hasim -getsimconfig
cluster_name
Retrieves information about VCS Simulator ports.
hasim -hb [..]
Equivalent to standard hahb command.
hasim -disablel10n
Disables localized inputs for attribute values. Use this option
when simulating UNIX configurations on Windows systems.
hasim -clus [...]
Equivalent to standard haclus command.
hasim -sys [...]
Equivalent to standard hasys command.
hasim -grp [...]
Equivalent to standard hagrp command.
hasim -res [...]
Equivalent to standard hares command.
hasim -type [...]
Equivalent to standard hatype command.
hasim -conf [...]
Equivalent to standard haconf command.
hasim -attr [...]
Equivalent to standard haattr command.
372
Section
3
Administration - Beyond the
basics
■
Chapter 11. Controlling VCS behavior
■
Chapter 12. The role of service group dependencies
■
Chapter 13. VCS event notification
■
Chapter 14. VCS event triggers
Chapter
11
Controlling VCS behavior
This chapter includes the following topics:
■
VCS behavior on resource faults
■
About controlling VCS behavior at the service group level
■
About controlling VCS behavior at the resource level
■
Changing agent file paths and binaries
■
Service group workload management
■
Sample configurations depicting workload management
VCS behavior on resource faults
VCS considers a resource faulted in the following situations:
■
When the resource state changes unexpectedly. For example, an online resource
going offline.
■
When a required state change does not occur. For example, a resource failing
to go online or offline when commanded to do so.
In many situations, VCS agents take predefined actions to correct the issue before
reporting resource failure to the engine. For example, the agent may try to bring a
resource online several times before declaring a fault.
When a resource faults, VCS takes automated actions to clean up the faulted
resource. The Clean function makes sure the resource is completely shut down
before bringing it online on another node. This prevents concurrency violations.
When a resource faults, VCS takes all resources dependent on the faulted resource
offline. The fault is thus propagated in the service group
Controlling VCS behavior
VCS behavior on resource faults
Critical and non-critical resources
The Critical attribute for a resource defines whether a service group fails over when
the resource faults. If a resource is configured as non-critical (by setting the Critical
attribute to 0) and no resources depending on the failed resource are critical, the
service group will not fail over. VCS takes the failed resource offline and updates
the group's status to PARTIAL. The attribute also determines whether a service
group tries to come online on another node if, during the group’s online process, a
resource fails to come online.
VCS behavior diagrams
Figure 11-1 displays the symbols used for resource configuration and color codes.
Figure 11-1
Symbols for resource configuration/actions and color codes
Example scenario 1: Resource with critical parent faults
Figure 11-2 shows an example of a service group with five resources, of which
resource R1 is configured as a critical resource.
Figure 11-2
Scenario 1: Resource with critical parent faults
When resource R2 faults, the fault is propagated up the dependency tree to resource
R1. When the critical resource R1 goes offline, VCS must fault the service group
and fail it over elsewhere in the cluster. VCS takes other resources in the service
group offline in the order of their dependencies. After taking resources R3, R4, and
R5 offline, VCS fails over the service group to another node.
375
Controlling VCS behavior
About controlling VCS behavior at the service group level
Example scenario 2: Resource with non-critical parent faults
Figure 11-3 shows an example of a service group that does not have any critical
resources.
Figure 11-3
Scenario 2: Resource with non-critical parent faults
When resource R2 faults, the engine propagates the failure up the dependency
tree. Neither resource R1 nor resource R2 are critical, so the fault does not result
in the tree going offline or in service group failover.
Example scenario 3: Resource with critical parent fails to come
online
Figure 11-4 shows an example where a command is issued to bring the service
group online and resource R2 fails to come online.
Figure 11-4
Scenario 3: Resource with critical parent fails to come online
VCS calls the Clean function for resource R2 and propagates the fault up the
dependency tree. Resource R1 is set to critical, so the service group is taken offline
and failed over to another node in the cluster.
About controlling VCS behavior at the service group
level
You can configure service group attributes to modify VCS behavior in response to
resource faults.
376
Controlling VCS behavior
About controlling VCS behavior at the service group level
About the AutoRestart attribute
If a persistent resource on a service group (GROUP_1) faults, VCS fails the service
group over to another system if the following conditions are met:
■
The AutoFailOver attribute is set.
■
Another system in the cluster exists to which GROUP_1 can fail over.
If neither of these conditions is met, GROUP_1 remains offline and faulted, even
after the faulted resource becomes online.
Setting the AutoRestart attribute enables a service group to be brought back online
without manual intervention. If no failover targets are available, setting the
AutoRestart attribute enables VCS to bring the group back online on the first
available system after the group’s faulted resource came online on that system.
For example, NIC is a persistent resource. In some cases, when a system boots
and VCS starts, VCS probes all resources on the system. When VCS probes the
NIC resource, the resource may not be online because the networking is not up
and fully operational. In such situations, VCS marks the NIC resource as faulted,
and does not bring the service group online. However, when the NIC resource
becomes online and if AutoRestart is enabled, the service group is brought online.
About controlling failover on service group or system faults
The AutoFailOver attribute configures service group behavior in response to service
group and system faults.
Table 11-1 shows the possible values for the attribute AutoFailover.
Table 11-1
Possible values of the AutoFailover attribute and their description
AutoFailover
attribute value
Description
0
VCS does not fail over the service group when a system or service
group faults.
If a fault occurs in a service group, the group is taken offline, depending
on whether any of its resources are configured as critical. If a system
faults, the service group is not failed over to another system.
377
Controlling VCS behavior
About controlling VCS behavior at the service group level
Table 11-1
Possible values of the AutoFailover attribute and their description
(continued)
AutoFailover
attribute value
Description
1
VCS automatically fails over the service group when a system or a
service group faults, provided a suitable node exists for failover.
The service group attributes SystemZones and FailOverPolicy impact
the failover behavior of the service group. For global clusters, the failover
decision is also based on the ClusterFailOverPolicy.
See “Service group attributes” on page 626.
About defining failover policies
The service group attribute FailOverPolicy governs how VCS calculates the target
system for failover.
Table 11-2 shows the possible values for the attribute FailoverPolicy.
Table 11-2
Possible values of the FailOverPolicy attribute and their description
FailOverPolicy
attribute value
Description
Priority
VCS selects the system with the lowest priority as the failover target.
The Priority failover policy is ideal for simple two-node clusters or
small clusters with few service groups.
Priority is set in the SystemList attribute implicitly via ordering, such
as SystemList = {SystemA, SystemB} or explicitly, such as SystemList
= {SystemA=0, SystemB=1}. Priority is the default behavior.
RoundRobin
VCS selects the system running the fewest service groups as the
failover target. This policy is ideal for large clusters running many
service groups with similar server load characteristics (for example,
similar databases or applications)
Load
The Load failover policy comprises the following components:
System capacity and service group load, represented by the attributes
Capacity and Load respectively.
See System capacity and service group load on page 396.
System limits and service group prerequisites, represented by the
attributes Limits and Prerequisites, respectively.
See System limits and service group prerequisites on page 398.
378
Controlling VCS behavior
About controlling VCS behavior at the service group level
About system zones
The SystemZones attribute enables you to create a subset of systems to use in an
initial failover decision. This feature allows fine-tuning of application failover
decisions, and yet retains the flexibility to fail over anywhere in the cluster.
If the attribute is configured, a service group tries to stay within its zone before
choosing a host in another zone. For example, in a three-tier application
infrastructure with Web, application, and database servers, you could create two
system zones: one each for the application and the database. In the event of a
failover, a service group in the application zone will try to fail over to another node
within the zone. If no nodes are available in the application zone, the group will fail
over to the database zone, based on the configured load and limits.
In this configuration, excess capacity and limits on the database backend are kept
in reserve to handle the larger load of a database failover. The application servers
handle the load of service groups in the application zone. During a cascading failure,
the excess capacity in the cluster is available to all service groups.
Load-based autostart
VCS provides a method to determine where a service group comes online when
the cluster starts. Setting the AutoStartPolicy to Load instructs the VCS engine,
HAD, to determine the best system on which to start the groups. VCS places service
groups in an AutoStart queue for load-based startup as soon as the groups probe
all running systems. VCS creates a subset of systems that meet all prerequisites
and then chooses the system with the highest AvailableCapacity.
Set AutoStartPolicy = Load and configure the SystemZones attribute to establish
a list of preferred systems on which to initially run a group.
About freezing service groups
Freezing a service group prevents VCS from taking any action when the service
group or a system faults. Freezing a service group prevents dependent resources
from going offline when a resource faults. It also prevents the Clean function from
being called on a resource fault.
You can freeze a service group when performing operations on its resources from
outside VCS control. This prevents VCS from taking actions on resources while
your operations are on. For example, freeze a database group when using database
controls to stop and start a database.
379
Controlling VCS behavior
About controlling VCS behavior at the service group level
About controlling Clean behavior on resource faults
The ManageFaults attribute specifies whether VCS calls the Clean function when
a resource faults. ManageFaults is a service group attribute; you can configure
each service group to operate as desired.
You can configure the ManageFaults attribute with the following possible values:
■
If the ManageFaults attribute is set to ALL, VCS calls the Clean function when
a resource faults.
■
If the ManageFaults attribute is set to NONE, VCS takes no action on a resource
fault; it "hangs the service group until administrative action can be taken. VCS
marks the resource state as ADMIN_WAIT and does not fail over the service
group until the resource fault is removed and the ADMIN_WAIT state is cleared.
VCS calls the resadminwait trigger when a resource enters the ADMIN_WAIT
state due to a resource fault if the ManageFaults attribute is set to NONE. You
can customize this trigger to provide notification about the fault.
When ManageFaults is set to NONE and one of the following events occur, the
resource enters the ADMIN_WAIT state:
Table 11-3 lists the possible events and the subsequent state of the resource when
the ManageFaults attribute is set to NONE.
Table 11-3
Possible events when the ManageFaults attribute is set to NONE
Event
Resource state
The offline function did not complete within
the expected time.
ONLINE|ADMIN_WAIT
The offline function was ineffective.
ONLINE|ADMIN_WAIT
The online function did not complete within OFFLINE|ADMIN_WAIT
the expected time.
The online function was ineffective.
OFFLINE|ADMIN_WAIT
The resource was taken offline unexpectedly. ONLINE|ADMIN_WAIT
For the online resource the monitor function ONLINE|MONITOR_TIMEDOUT|ADMIN_WAIT
consistently failed to complete within the
expected time.
Clearing resources in the ADMIN_WAIT state
When VCS sets a resource in the ADMIN_WAIT state, it invokes the resadminwait
trigger according to the reason the resource entered the state.
380
Controlling VCS behavior
About controlling VCS behavior at the service group level
See “About the resadminwait event trigger” on page 453.
To clear a resource
1
Take the necessary actions outside VCS to bring all resources into the required
state.
2
Verify that resources are in the required state by issuing the command:
hagrp -clearadminwait group -sys system
This command clears the ADMIN_WAIT state for all resources. If VCS continues
to detect resources that are not in the required state, it resets the resources
to the ADMIN_WAIT state.
3
If resources continue in the ADMIN_WAIT state, repeat step 1 and step 2, or
issue the following command to stop VCS from setting the resource to the
ADMIN_WAIT state:
hagrp -clearadminwait -fault group -sys system
This command has the following results:
■
■
If the resadminwait trigger was called for the reasons 0 or 1, the resource
state is set as ONLINE|UNABLE_TO_OFFLINE.
■
0 = The offline function did not complete within the expected time.
■
1 = The offline function was ineffective.
If the resadminwait trigger was called for reasons 2, 3, or 4, the resource
state is set as FAULTED. Note that when resources are set as FAULTED
for these reasons, the clean function is not called. Verify that resources in
ADMIN-WAIT are in clean, OFFLINE state prior to invoking this command.
■
2 = The online function did not complete within the expected time.
■
3 = The online function was ineffective.
■
4 = The resource was taken offline unexpectedly.
When a service group has a resource in the ADMIN_WAIT state, the following
service group operations cannot be performed on the resource: online, offline,
switch, and flush. Also, you cannot use the hastop command when resources
are in the ADMIN_WAIT state. When this occurs, you must issue the hastop
command with -force option only.
381
Controlling VCS behavior
About controlling VCS behavior at the service group level
About controlling fault propagation
The FaultPropagation attribute defines whether a resource fault is propagated up
the resource dependency tree. It also defines whether a resource fault causes a
service group failover.
You can configure the FaultPropagation attribute with the following possible values:
■
If the FaultPropagation attribute is set to 1 (default), a resource fault is
propagated up the dependency tree. If a resource in the path is critical, the
service group is taken offline and failed over, provided the AutoFailOver attribute
is set to 1.
■
If the FaultPropagation is set to 0, resource faults are contained at the resource
level. VCS does not take the dependency tree offline, thus preventing failover.
If the resources in the service group remain online, the service group remains
in the PARTIAL|FAULTED state. If all resources are offline or faulted, the service
group remains in the OFFLINE| FAULTED state.
When a resource faults, VCS fires the resfault trigger and sends an SNMP trap.
The trigger is called on the system where the resource faulted and includes the
name of the faulted resource.
Customized behavior diagrams
This topic depicts how the ManageFaults and FaultPropagation attributes change
VCS behavior when handling resource faults.
Figure 11-5 depicts the legends or resource color code.
Figure 11-5
Legends and resource color code
Example scenario: Resource with a critical parent and
ManageFaults=NONE
Figure 11-6 shows an example of a service group that has five resources. The
ManageFaults attribute for the group of resource R2 is set to NONE.
382
Controlling VCS behavior
About controlling VCS behavior at the service group level
Figure 11-6
Scenario: Resource with a critical parent and ManageFaults=NONE
If resource R2 fails, the resource is marked as ONLINE|ADMIN_WAIT. The Clean
function is not called for the resource. VCS does not take any other resource offline.
Example scenario: Resource with a critical parent and
FaultPropagation=0
Figure 11-7 ahows an example where the FaultPropagation attribute is set to 0.
Figure 11-7
Scenario: Resource with a critical parent and FaultPropagation=0
When resource R2 faults, the Clean function is called and the resource is marked
as faulted. The fault is not propagated up the tree, and the group is not taken offline.
VCS behavior for resources that support the intentional offline
functionality
Certain agents can identify when an application has been intentionally shut down
outside of VCS control.
For agents that support this functionality, if an administrator intentionally shuts down
an application outside of VCS control, VCS does not treat it as a fault. VCS sets
the service group state as offline or partial, depending on the state of other resources
in the service group.
This feature allows administrators to stop applications without causing a failover.
The feature is available for V51 agents.
383
Controlling VCS behavior
About controlling VCS behavior at the service group level
About the IntentionalOffline attribute
To configure a resource to recognize an intentional offline of configured application,
set the IntentionalOffline attribute to 1. Set the attribute to its default value of 0 to
disable this functionality. IntentionalOffline is Type level attribute and not a resource
level attribute.
You can configure the IntentionalOffline attribute with the following possible values:
■
If you set the attribute to 1: When the application is intentionally stopped outside
of VCS control, the resource enters an OFFLINE state. This attribute does not
affect VCS behavior on application failure. VCS continues to fault resources if
managed corresponding applications fail.
■
If you set the attribute to 0: When the application is intentionally stopped outside
of VCS control, the resource enters a FAULTED state.
About the ExternalStateChange attribute
Use the ExternalStateChange attribute to control service group behavior when a
configured application is intentionally started or stopped outside of VCS control.
The attribute defines how VCS handles service group state when resources are
intentionally brought online or taken offline outside of VCS control.
You can configure the ExternalStateChange attribute with the values listed in
Table 11-4.
Table 11-4
ExternalStateChange attribute values
Attribute
value
Service group behavior
OnlineGroup
If the configured application is started outside of VCS control, VCS brings
the corresponding service group online. If you attempt to start the
application on a frozen node or service group, VCS brings the
corresponding service group online once the node or the service group is
unfrozen.
OfflineGroup
If the configured application is stopped outside of VCS control, VCS takes
the corresponding service group offline.
OfflineHold
If a configured application is stopped outside of VCS control, VCS sets
the state of the corresponding VCS resource as offline. VCS does not take
any parent resources or the service group offline.
OfflineHold and OfflineGroup are mutually exclusive.
384
Controlling VCS behavior
About controlling VCS behavior at the resource level
About controlling VCS behavior at the resource level
You can control VCS behavior at the resource level. Note that a resource is not
considered faulted until the agent framework declares the fault to the VCS engine.
Certain attributes affect how the VCS agent framework reacts to problems with
individual resources before informing the fault to the VCS engine.
Resource type attributes that control resource behavior
The following attributes affect how the VCS agent framework reacts to problems
with individual resources before informing the fault to the VCS engine.
About the RestartLimit attribute
The RestartLimit attribute defines whether VCS attempts to restart a failed resource
before informing the engine of the fault.
If the RestartLimit attribute is set to a non-zero value, the agent attempts to restart
the resource before declaring the resource as faulted. When restarting a failed
resource, the agent framework calls the Clean function before calling the Online
function. However, setting the ManageFaults attribute to NONE prevents the Clean
function from being called and prevents the Online function from being retried.
About the OnlineRetryLimit attribute
The OnlineRetryLimit attribute specifies the number of times the Online function is
retried if the initial attempt to bring a resource online is unsuccessful.
When the OnlineRetryLimit set to a non-zero value, the agent framework calls the
Clean function before rerunning the Online function. Setting the ManageFaults
attribute to NONE prevents the Clean function from being called and also prevents
the Online operation from being retried.
About the ConfInterval attribute
The ConfInterval attribute defines how long a resource must remain online without
encountering problems before previous problem counters are cleared. The attribute
controls when VCS clears the RestartCount, ToleranceCount and
CurrentMonitorTimeoutCount values.
About the ToleranceLimit attribute
The ToleranceLimit attribute defines the number of times the monitor routine should
return an offline status before declaring a resource offline. This attribute is typically
used when a resource is busy and appears to be offline. Setting the attribute to a
385
Controlling VCS behavior
About controlling VCS behavior at the resource level
non-zero value instructs VCS to allow multiple failing monitor cycles with the
expectation that the resource will eventually respond. Setting a non-zero
ToleranceLimit also extends the time required to respond to an actual fault.
About the FaultOnMonitorTimeouts attribute
The FaultOnMonitorTimeouts attribute defines whether VCS interprets a Monitor
function timeout as a resource fault.
If the attribute is set to 0, VCS does not treat Monitor timeouts as a resource faults.
If the attribute is set to 1, VCS interprets the timeout as a resource fault and the
agent calls the Clean function to shut the resource down.
By default, the FaultOnMonitorTimeouts attribute is set to 4. This means that the
Monitor function must time out four times in a row before the resource is marked
faulted. The first monitor time out timer and the counter of time outs are reset after
one hour of the first monitor time out.
How VCS handles resource faults
This section describes the process VCS uses to determine the course of action
when a resource faults.
VCS behavior when an online resource faults
In the following example, a resource in an online state is reported as being offline
without being commanded by the agent to go offline.
VCS goes through the following steps when an online resource faults:
■
VCS first verifies the Monitor routine completes successfully in the required
time. If it does, VCS examines the exit code returned by the Monitor routine. If
the Monitor routine does not complete in the required time, VCS looks at the
FaultOnMonitorTimeouts (FOMT) attribute.
■
If FOMT=0, the resource will not fault when the Monitor routine times out. VCS
considers the resource online and monitors the resource periodically, depending
on the monitor interval.
If FOMT=1 or more, VCS compares the CurrentMonitorTimeoutCount (CMTC)
with the FOMT value. If the monitor timeout count is not used up, CMTC is
incremented and VCS monitors the resource in the next cycle.
■
If FOMT= CMTC, this means that the available monitor timeout count is
exhausted and VCS must now take corrective action. VCS checks the Frozen
attribute for the service group. If the service group is frozen, VCS declares the
resource faulted and calls the resfault trigger. No further action is taken.
386
Controlling VCS behavior
About controlling VCS behavior at the resource level
■
If the service group is not frozen, VCS checks the ManageFaults attribute for
the service group. If the ManageFaults attribute is set to NONE, VCS marks the
resource as ONLINE|ADMIN_WAIT and fires the resadminwait trigger. If the
ManageFaults attribute is set to ALL, VCS invokes the Clean function with the
reason Monitor Hung.
■
If the Clean function is successful (that is, Clean exit code = 0), VCS examines
the value of the RestartLimit attribute. If Clean fails (exit code = 1), the resource
remains online with the state UNABLE TO OFFLINE. VCS fires the resnotoff
trigger and monitors the resource again.
■
If the Monitor routine does not time out, it returns the status of the resource as
being online or offline.
■
If the ToleranceLimit (TL) attribute is set to a non-zero value, the Monitor cycle
returns offline (exit code = 100) for a number of times specified by the
ToleranceLimit and increments the ToleranceCount (TC). When the
ToleranceCount equals the ToleranceLimit (TC = TL), the agent declares the
resource as faulted.
■
If the Monitor routine returns online (exit code = 110) during a monitor cycle,
the agent takes no further action. The ToleranceCount attribute is reset to 0
when the resource is online for a period of time specified by the ConfInterval
attribute.
If the resource is detected as being offline a number of times specified by the
ToleranceLimit before the ToleranceCount is reset (TC = TL), the resource is
considered faulted.
■
After the agent determines the resource is not online, VCS checks the Frozen
attribute for the service group. If the service group is frozen, VCS declares the
resource faulted and calls the resfault trigger. No further action is taken.
■
If the service group is not frozen, VCS checks the ManageFaults attribute. If
ManageFaults=NONE, VCS marks the resource state as ONLINE|ADMIN_WAIT
and calls the resadminwait trigger. If ManageFaults=ALL, VCS calls the Clean
function with the CleanReason set to Unexpected Offline.
■
If the Clean function fails (exit code = 1) the resource remains online with the
state UNABLE TO OFFLINE. VCS fires the resnotoff trigger and monitors the
resource again. The resource enters a cycle of alternating Monitor and Clean
functions until the Clean function succeeds or a user intervenes.
■
If the Clean function is successful, VCS examines the value of the RestartLimit
(RL) attribute. If the attribute is set to a non-zero value, VCS increments the
RestartCount (RC) attribute and invokes the Online function. This continues till
the value of the RestartLimit equals that of the RestartCount. At this point, VCS
attempts to monitor the resource.
387
Controlling VCS behavior
About controlling VCS behavior at the resource level
■
If the Monitor returns an online status, VCS considers the resource online and
resumes periodic monitoring. If the monitor returns an offline status, the resource
is faulted and VCS takes actions based on the service group configuration.
VCS behavior when a resource fails to come online
In the following example, the agent framework invokes the Online function for an
offline resource. The resource state changes to WAITING TO ONLINE.
VCS goes through the following steps when a resource fails to come online:
■
If the Online function times out, VCS examines the value of the ManageFaults
attribute.
■
If ManageFaults is set to NONE, the resource state changes to
OFFLINE|ADMIN_WAIT.
388
Controlling VCS behavior
About controlling VCS behavior at the resource level
If ManageFaults is set to ALL, VCS calls the Clean function with the CleanReason
set to Online Hung.
■
If the Online function does not time out, VCS invokes the Monitor function. The
Monitor routine returns an exit code of 110 if the resource is online. Otherwise,
the Monitor routine returns an exit code of 100.
■
VCS examines the value of the OnlineWaitLimit (OWL) attribute. This attribute
defines how many monitor cycles can return an offline status before the agent
framework declares the resource faulted. Each successive Monitor cycle
increments the OnlineWaitCount (OWC) attribute. When OWL= OWC (or if
OWL= 0), VCS determines the resource has faulted.
■
VCS then examines the value of the ManageFaults attribute. If the ManageFaults
is set to NONE, the resource state changes to OFFLINE|ADMIN_WAIT.
If the ManageFaults is set to ALL, VCS calls the Clean function with the
CleanReason set to Online Ineffective.
■
If the Clean function is not successful (exit code = 1), the agent monitors the
resource. It determines the resource is offline, and calls the Clean function with
the Clean Reason set to Online Ineffective. This cycle continues till the Clean
function is successful, after which VCS resets the OnlineWaitCount value.
■
If the OnlineRetryLimit (ORL) is set to a non-zero value, VCS increments the
OnlineRetryCount (ORC) and invokes the Online function. This starts the cycle
all over again. If ORL = ORC, or if ORL = 0, VCS assumes that the Online
operation has failed and declares the resource as faulted.
389
Controlling VCS behavior
About controlling VCS behavior at the resource level
A
Resource
Offline
Online. Resource
Waiting to Online
Online
Timeout?
YES
NO
Resource
Online
110
Monitor
Exit Code
OWC =
OWC+1
100
YES
OWL>
OWC?
Manage
Faults
NO
Manage
Faults
ALL
NO
NONE
Resource
Offline | Admin_Wait
resadminwait Trigger
ALL
NONE
Clean.
“Online Ineffective
Resource
Offline | Admin_Wait
resadminwait Trigger
Clean.
“Online Hung
ORC=
ORC+1
Clean
Success?
YES
Reset OWC
NO
ORL >
ORC?
B
YES
VCS behavior after a resource is declared faulted
After a resource is declared faulted, VCS fires the resfault trigger and examines
the value of the FaultPropagation attribute.
VCS goes through the following steps after a resource is declared faulted:
■
If FaultPropagation is set to 0, VCS does not take other resources offline, and
changes the group state to OFFLINE|FAULTED or PARTIAL|FAULTED. The
service group does not fail over.
390
Controlling VCS behavior
About controlling VCS behavior at the resource level
If FaultPropagation is set to 1, VCS takes all resources in the dependent path
of the faulted resource offline, up to the top of the tree.
■
VCS then examines if any resource in the dependent path is critical. If no
resources are critical, the service group is left in its OFFLINE|FAULTED or
PARTIAL|FAULTED state. If a resource in the path is critical, VCS takes the all
resources in the service group offline in preparation of a failover.
■
If the AutoFailOver attribute is set to 0, the service group is not failed over; it
remains in a faulted state. If AutoFailOver is set to 1, VCS examines if any
systems in the service group’s SystemList are possible candidates for failover.
If no suitable systems exist, the group remains faulted and VCS calls the
nofailover trigger. If eligible systems are available, VCS examines the
FailOverPolicy to determine the most suitable system to which to fail over the
service group.
■
If FailOverPolicy is set to Load, a NoFailover situation may occur because of
restrictions placed on service groups and systems by Service Group Workload
Management.
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Controlling VCS behavior
About controlling VCS behavior at the resource level
A
Resource faults.
resfault Trigger
Fault
Propagation
0
No other resources affected.
No group failover.
1
Offline all
resources in
dependent path
Critical
resources?
NO
No other resources affected.
No group failover.
YES
Offline entire tree
Auto
Failover
0
System
available?
NO
Service group offline in
Faulted state.
Service group offline in
Faulted state. Nofailover
trigger.
Failover based on
FailOverPolicy
About disabling resources
Disabling a resource means that the resource is no longer monitored by a VCS
agent, and that the resource cannot be brought online or taken offline. The agent
starts monitoring the resource after the resource is enabled. The resource attribute
Enabled determines whether a resource is enabled or disabled. A persistent resource
can be disabled when all its parents are offline. A non-persistent resource can be
disabled when the resource is in an OFFLINE state.
392
Controlling VCS behavior
About controlling VCS behavior at the resource level
When to disable a resource
Typically, resources are disabled when one or more resources in the service group
encounter problems and disabling the resource is required to keep the service
group online or to bring it online.
Note: Disabling a resource is not an option when the entire service group requires
disabling. In that case, set the service group attribute Enabled to 0.
Use the following command to disable the resource when VCS is running:
# hares -modify resource_name Enabled 0
To have the resource disabled initially when VCS is started, set the resource’s
Enabled attribute to 0 in main.cf.
Limitations of disabling resources
When VCS is running, there are certain prerequisites to be met before the resource
is disabled successfully.
■
An online non-persistent resource cannot be disabled. It must be in a clean
OFFLINE state. (The state must be OFFLINE and IState must be NOT
WAITING.)
■
If it is a persistent resource and the state is ONLINE on some of the systems,
all dependent resources (parents) must be in clean OFFLINE state. (The state
must be OFFLINE and IState must be NOT WAITING)
Therefore, before disabling the resource you may be required to take it offline (if it
is non-persistent) and take other resources offline in the service group.
Additional considerations for disabling resources
Following are the additional considerations for disabling resources:
■
When a group containing disabled resources is brought online, the online
transaction is not propagated to the disabled resources. Children of the disabled
resource are brought online by VCS only if they are required by another enabled
resource.
■
You can bring children of disabled resources online if necessary.
■
When a group containing disabled resources is taken offline, the offline
transaction is propagated to the disabled resources.
■
If a service group is part of an hagrp -online -propagate operation or an
hagrp -offline -propagate operation and a resource in the service group is
393
Controlling VCS behavior
About controlling VCS behavior at the resource level
disabled, the resource might not complete its online operation or offline operation.
In this case, PolicyIntention of the service group is set to 0.
In an hagrp online -propagate operation, if the child service groups cannot
be brought online, the parent service groups also cannot be brought online.
Therefore, when the PolicyIntention value of 1 for the child service group is
cleared, the PolicyIntention value of all its parent service groups in dependency
tree is also cleared. When the PolicyIntention value of 2 for the parent service
group is cleared, the PolicyIntention value of all its child service groups in
dependency tree is also cleared.
This section shows how a service group containing disabled resources is brought
online.
Figure 11-8 shows Resource_3 is disabled. When the service group is brought
online, the only resources brought online by VCS are Resource_1 and Resource_2
(Resource_2 is brought online first) because VCS recognizes Resource_3 is
disabled. In accordance with online logic, the transaction is not propagated to the
disabled resource.
Scenario: Transaction not propagated to the disabled resource
(Resource_3)
Resource_1
Go
in
g
on
lin
g
Figure 11-8
Resource_2
Resource_3
Resource_3 is disabled.
Resource_4
Resource_4 is offline.
Resource_5
Resource_5 is offline.
Figure 11-9, shows that Resource_2 is disabled. When the service group is brought
online, resources 1, 3, 4 are also brought online (Resource_4 is brought online
first). Note Resource_3, the child of the disabled resource, is brought online because
Resource_1 is enabled and is dependent on it.
394
Controlling VCS behavior
Changing agent file paths and binaries
Figure 11-9
Scenario: Child of the disabled resource (Resource_3) is brought
online
Resource_1
Resource_2
Going onling
Resource_2 is disabled.
Resource_3
Resource_4
How disabled resources affect group states
When a service group is brought online containing non-persistent, disabled resources
whose AutoStart attributes are set to 1, the group state is PARTIAL, even though
enabled resources with Autostart=1 are online. This is because the disabled resource
is considered for the group state.
To have the group in the ONLINE state when enabled resources with AutoStart set
to 1 are in ONLINE state, set the AutoStart attribute to 0 for the disabled,
non-persistent resources.
Changing agent file paths and binaries
VCS runs agent binaries from the path %VCS_HOME%\bin\agent_name\.
You can instruct VCS to run a different set of agent binaries or scripts by specifying
values for the following attributes.
■
AgentFile:
Specify a value for this attribute if the name of the agent binary is not the same
as that of the resource type.
For example, if the resource type is NetBackup and the agent binary is called
NBU.dll, set the AgentFile attribute to NBU.dll.
■
AgentDirectory:
Specify a value for this attribute if the agent is not installed at the default location.
When you specify the agent directory, VCS looks for the agent file
(AgentNameAgent) in the agent directory. If the agent file name does not conform
to the AgentNameAgent convention, configure the AgentFile attribute.
For example, if the NetBackup agent is installed at C:\Program
Files\VERITAS\NetBackup, specify this path as the attribute value.
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Controlling VCS behavior
Service group workload management
To change the path of an agent
◆
Before configuring a resource for the agent, set the AgentFile and
AgentDirectory attributes of the agent’s resource type.
hatype -modify resource_type AgentFile "binary_name.dll"
hatype -modify resource_type AgentDirectory "C:\Program
Files\agent_path"
Service group workload management
Workload management is a load-balancing mechanism that determines which
system hosts an application during startup, or after an application or server fault.
Service Group Workload Management provides tools for making intelligent decisions
about startup and failover locations, based on system capacity and resource
availability.
About enabling service group workload management
The service group attribute FailOverPolicy governs how VCS calculates the target
system for failover. Set FailOverPolicy to Load to enable service group workload
management.
See “ About controlling VCS behavior at the resource level” on page 385.
System capacity and service group load
The Load and Capacity construct allows the administrator to define a fixed amount
of resources a server provides (Capacity), and a fixed amount of resources a specific
service group is expected to utilize (Load).
The system attribute Capacity sets a fixed load-handling capacity for servers. Define
this attribute based on system requirements.
The service group attribute Load sets a fixed demand for service groups. Define
this attribute based on application requirements.
When a service group is brought online, its load is subtracted from the system’s
capacity to determine available capacity. VCS maintains this info in the attribute
AvailableCapacity.
When a failover occurs, VCS determines which system has the highest available
capacity and starts the service group on that system. During a failover involving
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Controlling VCS behavior
Service group workload management
multiple service groups, VCS makes failover decisions serially to facilitate a proper
load-based choice.
System capacity is a soft restriction; in some situations, value of the Capacity
attribute could be less than zero. During some operations, including cascading
failures, the value of the AvailableCapacity attribute could be negative.
Static load versus dynamic load
Dynamic load is an integral component of the Service Group Workload Management
framework. Typically, HAD sets remaining capacity with the function:
AvailableCapacity = Capacity - (sum of Load values of all online service groups)
If the DynamicLoad attribute is defined, its value overrides the calculated Load
values with the function:
AvailableCapacity = Capacity - DynamicLoad
This enables better control of system loading values than estimated service group
loading (static load). However, this requires setting up and maintaining a load
estimation package outside VCS. It also requires modifying the configuration file
main.cf manually.
Note that the DynamicLoad (specified with hasys -load) is subtracted from the
Capacity as an integer and not a percentage value. For example, if a system’s
capacity is 200 and the load estimation package determines the server is 80 percent
loaded, it must inform VCS that the DynamicLoad value is 160 (not 80).
About overload warning
Overload warning provides the notification component of the Load policy. When a
server sustains the preset load level (set by the attribute LoadWarningLevel) for a
preset time (set by the attribute LoadTimeThreshold), VCS invokes the loadwarning
trigger.
See “Using event triggers” on page 449.
See System attributes on page 646.
The loadwarning trigger is a user-defined script or application designed to carry out
specific actions. It is invoked once, when system load exceeds the
LoadWarningLevel for the LoadTimeThreshold. It is not invoked again until the
LoadTimeCounter, which determines how many seconds system load has been
above LoadWarningLevel, is reset.
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Controlling VCS behavior
Sample configurations depicting workload management
System limits and service group prerequisites
Limits is a system attribute and designates which resources are available on a
system, including shared memory segments and semaphores.
Prerequisites is a service group attribute and helps manage application requirements.
For example, a database may require three shared memory segments and 10
semaphores. VCS Load policy determines which systems meet the application
criteria and then selects the least-loaded system.
If the prerequisites defined for a service group are not met on a system, the service
group cannot be brought online on the system.
When configuring these attributes, define the service group’s prerequisites first,
then the corresponding system limits. Each system can have a different limit and
there is no cap on the number of group prerequisites and system limits. Service
group prerequisites and system limits can appear in any order.
You can also use these attributes to configure the cluster as N-to-1 or N-to-N. For
example, to ensure that only one service group can be online on a system at a time,
add the following entries to the definition of each group and system:
Prerequisites = { GroupWeight = 1 }
Limits = { GroupWeight = 1 }
System limits and group prerequisites work independently of FailOverPolicy.
Prerequisites determine the eligible systems on which a service group can be
started. When a list of systems is created, HAD then follows the configured
FailOverPolicy.
About capacity and limits
When selecting a node as a failover target, VCS selects the system that meets the
service group’s prerequisites and has the highest available capacity. If multiple
systems meet the prerequisites and have the same available capacity, VCS selects
the system appearing lexically first in the SystemList.
Systems having an available capacity of less than the percentage set by the
LoadWarningLevel attribute, and those remaining at that load for longer than the
time specified by the LoadTimeThreshold attribute invoke the loadwarning trigger.
Sample configurations depicting workload
management
This topic lists some sample configurations that use the concepts.
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Controlling VCS behavior
Sample configurations depicting workload management
System and Service group definitions
The main.cf in this example shows various Service Group Workload Management
attributes in a system definition and a service group definition.
See “About attributes and their definitions” on page 606.
include "types.cf"
cluster SGWM-demo (
)
system LargeServer1 (
Capacity = 200
Limits = { ShrMemSeg=20, Semaphores=10, Processors=12 }
LoadWarningLevel = 90
LoadTimeThreshold = 600
)
system LargeServer2 (
Capacity = 200
Limits = { ShrMemSeg=20, Semaphores=10, Processors=12 }
LoadWarningLevel=70
LoadTimeThreshold=300
)
system MedServer1 (
Capacity = 100
Limits = { ShrMemSeg=10, Semaphores=5, Processors=6 }
)
system MedServer2 (
Capacity = 100
Limits = { ShrMemSeg=10, Semaphores=5, Processors=6 }
)
group G1 (
SystemList = { LargeServer1 = 0, LargeServer2 = 1,
MedServer1 = 2 , MedServer2 = 3 }
SystemZones = { LargeServer1=0, LargeServer2=0,
MedServer1=1, MedServer2=1 }
AutoStartPolicy = Load
AutoStartList = { MedServer1, MedServer2 }
FailOverPolicy = Load
Load = 100
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Controlling VCS behavior
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Prerequisites = { ShrMemSeg=10, Semaphores=5, Processors=6 }
)
Sample configuration: Basic four-node cluster
Following is the sample configuration for a basic four-node cluster:
include "types.cf"
cluster SGWM-demo
system Server1 (
Capacity = 100
)
system Server2 (
Capacity = 100
)
system Server3 (
Capacity = 100
)
system Server4 (
Capacity = 100
)
group G1 (
SystemList = { Server1, Server2, Server3, Server4 }
AutoStartPolicy = Load
AutoStartList = { Server1, Server2, Server3, Server4 }
FailOverPolicy = Load
Load = 20
)
group G2 (
SystemList = { Server1, Server2, Server3, Server4 }
AutoStartPolicy = Load
AutoStartList = { Server1, Server2, Server3, Server4 }
FailOverPolicy = Load
Load = 40
)
group G3 (
400
Controlling VCS behavior
Sample configurations depicting workload management
SystemList = { Server1, Server2, Server3, Server4 }
AutoStartPolicy = Load
AutoStartList = { Server1, Server2, Server3, Server4 }
FailOverPolicy = Load
Load = 30
)
group G4 (
SystemList = { Server1, Server2, Server3, Server4 }
AutoStartPolicy = Load
AutoStartList = { Server1, Server2, Server3, Server4 }
FailOverPolicy = Load
Load = 10
)
group G5 (
SystemList = { Server1, Server2, Server3, Server4 }
AutoStartPolicy = Load
AutoStartList = { Server1, Server2, Server3, Server4 }
FailOverPolicy = Load
Load = 50
)
group G6 (
SystemList = { Server1, Server2, Server3, Server4 }
AutoStartPolicy = Load
AutoStartList = { Server1, Server2, Server3, Server4 }
FailOverPolicy = Load
Load = 30
)
group G7 (
SystemList = { Server1, Server2, Server3, Server4 }
AutoStartPolicy = Load
AutoStartList = { Server1, Server2, Server3, Server4 }
FailOverPolicy = Load
Load = 20
)
group G8 (
SystemList = { Server1, Server2, Server3, Server4 }
AutoStartPolicy = Load
AutoStartList = { Server1, Server2, Server3, Server4 }
401
Controlling VCS behavior
Sample configurations depicting workload management
FailOverPolicy = Load
Load = 40
)
See “About AutoStart operation” on page 402.
About AutoStart operation
In this configuration, assume that groups probe in the same order they are described,
G1 through G8. Group G1 chooses the system with the highest AvailableCapacity
value. All systems have the same available capacity, so G1 starts on Server1
because this server is lexically first. Groups G2 through G4 follow on Server2
through Server4.
Table 11-5 shows the Autostart cluster configuration for a basic four-node cluster
with the initial four service groups online.
Table 11-5
Autostart cluster configuration for a basic four-node cluster
Server
Available capacity
Online groups
Server1
80
G1
Server2
60
G2
Server3
70
G3
Server4
90
G4
As the next groups come online, group G5 starts on Server4 because this server
has the highest AvailableCapacity value. Group G6 then starts on Server1 with
AvailableCapacity of 80. Group G7 comes online on Server3 with AvailableCapacity
of 70 and G8 comes online on Server2 with AvailableCapacity of 60.
Table 11-6 shows the Autostart cluster configuration for a basic four-node cluster
with the other service groups online.
Table 11-6
Autostart cluster configuration for a basic four-node clusterwith
the other service groups online
Server
Available capacity
Online groups
Server1
50
G1 and G6
Server2
20
G2 and G8
Server3
50
G3 and G7
Server4
40
G4 and G5
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Controlling VCS behavior
Sample configurations depicting workload management
In this configuration, Server2 fires the loadwarning trigger after 600 seconds because
it is at the default LoadWarningLevel of 80 percent.
About the failure scenario
In the first failure scenario, Server4 fails. Group G4 chooses Server1 because
Server1 and Server3 have AvailableCapacity of 50 and Server1 is lexically first.
Group G5 then comes online on Server3. Serializing the failover choice allows
complete load-based control and adds less than one second to the total failover
time.
Table 11-7 shows the cluster configuration following the first failure for a basic
four-node cluster.
Table 11-7
Cluster configuration following the first failure
Server
Available capacity
Online groups
Server1
40
G1, G6, and G4
Server2
20
G2 and G8
Server3
0
G3, G7, and G5
In this configuration, Server3 fires the loadwarning trigger to notify that the server
is overloaded. An administrator can then switch group G7 to Server1 to balance
the load across groups G1 and G3. When Server4 is repaired, it rejoins the cluster
with an AvailableCapacity value of 100, making it the most eligible target for a
failover group.
About the cascading failure scenario
If Server3 fails before Server4 can be repaired, group G3 chooses Server1, group
G5 chooses Server2, and group G7 chooses Server1. This results in the following
configuration:
Table 11-8 shows a cascading failure scenario for a basic four node cluster.
Table 11-8
Cascading failure scenario for a basic four node cluster
Server
Available capacity
Online groups
Server1
-10
G1, G6, G4, G3, and G7
Server2
-30
G2, G8, and G5
Server1 fires the loadwarning trigger to notify that it is overloaded.
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Controlling VCS behavior
Sample configurations depicting workload management
Sample configuration: Complex four-node cluster
The cluster in this example has two large enterprise servers (LargeServer1 and
LargeServer2) and two medium-sized servers (MedServer1 and MedServer2). It
has four service groups, G1 through G4, with various loads and prerequisites.
Groups G1 and G2 are database applications with specific shared memory and
semaphore requirements. Groups G3 and G4 are middle-tier applications with no
specific memory or semaphore requirements.
include "types.cf"
cluster SGWM-demo (
)
system LargeServer1 (
Capacity = 200
Limits = { ShrMemSeg=20, Semaphores=10, Processors=12 }
LoadWarningLevel = 90
LoadTimeThreshold = 600
)
system LargeServer2 (
Capacity = 200
Limits = { ShrMemSeg=20, Semaphores=10, Processors=12 }
LoadWarningLevel=70
LoadTimeThreshold=300
)
system MedServer1 (
Capacity = 100
Limits = { ShrMemSeg=10, Semaphores=5, Processors=6 }
)
system MedServer2 (
Capacity = 100
Limits = { ShrMemSeg=10, Semaphores=5, Processors=6 }
)
group G1 (
SystemList = { LargeServer1, LargeServer2, MedServer1,
MedServer2 }
SystemZones = { LargeServer1=0, LargeServer2=0, MedServer1=1,
MedServer2=1 }
AutoStartPolicy = Load
AutoStartList = { LargeServer1, LargeServer2 }
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Controlling VCS behavior
Sample configurations depicting workload management
405
FailOverPolicy = Load
Load = 100
Prerequisites = { ShrMemSeg=10, Semaphores=5, Processors=6 }
)
group G2 (
SystemList = { LargeServer1, LargeServer2, MedServer1,
MedServer2 }
SystemZones = { LargeServer1=0, LargeServer2=0, MedServer1=1,
MedServer2=1 }
AutoStartPolicy = Load
AutoStartList = { LargeServer1, LargeServer2 }
FailOverPolicy = Load
Load = 100
Prerequisites = { ShrMemSeg=10, Semaphores=5, Processors=6 }
)
group G3 (
SystemList = { LargeServer1, LargeServer2, MedServer1, MedServer2 }
SystemZones = { LargeServer1=0, LargeServer2=0, MedServer1=1,
MedServer2=1 }
AutoStartPolicy = Load
AutoStartList = { MedServer1, MedServer2 }
FailOverPolicy = Load
Load = 30
)
group G4 (
SystemList = { LargeServer1, LargeServer2, MedServer1, MedServer2 }
SystemZones = { LargeServer1=0, LargeServer2=0, MedServer1=1,
MedServer2=1 }
AutoStartPolicy = Load
AutoStartList = { MedServer1, MedServer2 }
FailOverPolicy = Load
Load = 20
)
About the AutoStart operation
In this configuration, the AutoStart sequence resembles:
G1—LargeServer1
G2—LargeServer2
Controlling VCS behavior
Sample configurations depicting workload management
G3—MedServer1
G4—MedServer2
All groups begin a probe sequence when the cluster starts. Groups G1 and G2
have an AutoStartList of LargeServer1 and LargeServer2. When these groups
probe, they are queued to go online on one of these servers, based on highest
AvailableCapacity value. If G1 probes first, it chooses LargeServer1 because
LargeServer1 and LargeServer2 both have an AvailableCapacity of 200, but
LargeServer1 is lexically first. Groups G3 and G4 use the same algorithm to
determine their servers.
About the normal operation
Table 11-9 shows the cluster configuration for a normal operation for a complex
four-node cluster.
Table 11-9
Normal operation cluster configuration for a complex four-node
cluster
Server
Available capacity
Current limits
Online groups
LargeServer1
100
ShrMemSeg=10
G1
Semaphores=5
Processors=6
LargeServer2
100
ShrMemSeg=10
G2
Semaphores=5
Processors=6
MedServer1
70
ShrMemSeg=10
G3
Semaphores=5
Processors=6
MedServer2
80
ShrMemSeg=10
G4
Semaphores=5
Processors=6
About the failure scenario
In this scenario, if LargeServer2 fails, VCS scans all available systems in group
G2’s SystemList that are in the same SystemZone and creates a subset of systems
that meet the group’s prerequisites. In this case, LargeServer1 meets all required
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Controlling VCS behavior
Sample configurations depicting workload management
Limits. Group G2 is brought online on LargeServer1. This results in the following
configuration:
Table 11-10 shows a failure scenario cluster configuration for a complex four-node
cluster.
Table 11-10
Failure scenario cluster configuration for a complex four-node
cluster
Server
Available capacity
Current limits
Online groups
LargeServer1
0
ShrMemSeg=0
G1, G2
Semaphores=0
Processors=0
MedServer1
70
ShrMemSeg=10
G3
Semaphores=5
Processors=6
MedServer2
80
ShrMemSeg=10
G4
Semaphores=5
Processors=6
After 10 minutes (LoadTimeThreshold = 600) VCS fires the loadwarning trigger on
LargeServer1 because the LoadWarningLevel exceeds 90 percent.
About the cascading failure scenario
In this scenario, another system failure can be tolerated because each system has
sufficient Limits to accommodate the service group running on its peer. If
MedServer1 fails, its groups can fail over to MedServer2.
If LargeServer1 fails, the failover of the two groups running on it is serialized. The
first group lexically, G1, chooses MedServer2 because the server meets the required
Limits and has AvailableCapacity value. Group G2 chooses MedServer1 because
it is the only remaining system that meets the required Limits.
Sample configuration: Server consolidation
The following configuration has a complex eight-node cluster running multiple
applications and large databases. The database servers, LargeServer1,
LargeServer2, and LargeServer3, are enterprise systems. The middle-tier servers
running multiple applications are MedServer1, MedServer2, MedServer3,
MedServer4, and MedServer5.
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Controlling VCS behavior
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In this configuration, the database zone (system zone 0) can handle a maximum
of two failures. Each server has Limits to support a maximum of three database
service groups. The application zone has excess capacity built into each server.
The servers running the application groups specify Limits to support one database,
even though the application groups do not run prerequisites. This allows a database
to fail over across system zones and run on the least-loaded server in the application
zone.
include "types.cf"
cluster SGWM-demo (
)
system LargeServer1 (
Capacity = 200
Limits = { ShrMemSeg=15, Semaphores=30, Processors=18 }
LoadWarningLevel = 80
LoadTimeThreshold = 900
)
system LargeServer2 (
Capacity = 200
Limits = { ShrMemSeg=15, Semaphores=30, Processors=18 }
LoadWarningLevel=80
LoadTimeThreshold=900
)
system LargeServer3 (
Capacity = 200
Limits = { ShrMemSeg=15, Semaphores=30, Processors=18 }
LoadWarningLevel=80
LoadTimeThreshold=900
)
system MedServer1 (
Capacity = 100
Limits = { ShrMemSeg=5, Semaphores=10, Processors=6 }
)
system MedServer2 (
Capacity = 100
Limits = { ShrMemSeg=5, Semaphores=10, Processors=6 }
)
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Controlling VCS behavior
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system MedServer3 (
Capacity = 100
Limits = { ShrMemSeg=5, Semaphores=10, Processors=6 }
)
system MedServer4 (
Capacity = 100
Limits = { ShrMemSeg=5, Semaphores=10, Processors=6 }
)
system MedServer5 (
Capacity = 100
Limits = { ShrMemSeg=5, Semaphores=10, Processors=6 }
)
group Database1 (
SystemList = { LargeServer1, LargeServer2, LargeServer3,
MedServer1, MedServer2, MedServer3, MedServer4,
MedServer5 }
SystemZones = { LargeServer1=0, LargeServer2=0,
LargeServer3=0,
MedServer1=1, MedServer2=1, MedServer3=1,
MedServer4=1,
MedServer5=1 }
AutoStartPolicy = Load
AutoStartList = { LargeServer1, LargeServer2, LargeServer3 }
FailOverPolicy = Load
Load = 100
Prerequisites = { ShrMemSeg=5, Semaphores=10, Processors=6 }
)
group Database2 (
SystemList = { LargeServer1, LargeServer2, LargeServer3,
MedServer1, MedServer2, MedServer3, MedServer4,
MedServer5 }
SystemZones = { LargeServer1=0, LargeServer2=0,
LargeServer3=0,
MedServer1=1, MedServer2=1, MedServer3=1,
MedServer4=1,
MedServer5=1 }
AutoStartPolicy = Load
AutoStartList = { LargeServer1, LargeServer2, LargeServer3 }
FailOverPolicy = Load
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Controlling VCS behavior
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Load = 100
Prerequisites = { ShrMemSeg=5, Semaphores=10, Processors=6 }
)
group Database3 (
SystemList = { LargeServer1, LargeServer2, LargeServer3,
MedServer1, MedServer2, MedServer3, MedServer4,
MedServer5 }
SystemZones = { LargeServer1=0, LargeServer2=0,
LargeServer3=0,
MedServer1=1, MedServer2=1, MedServer3=1,
MedServer4=1,
MedServer5=1 }
AutoStartPolicy = Load
AutoStartList = { LargeServer1, LargeServer2, LargeServer3 }
FailOverPolicy = Load
Load = 100
Prerequisites = { ShrMemSeg=5, Semaphores=10, Processors=6 }
)
group Application1 (
SystemList = { LargeServer1, LargeServer2, LargeServer3,
MedServer1, MedServer2, MedServer3, MedServer4,
MedServer5 }
SystemZones = { LargeServer1=0, LargeServer2=0,
LargeServer3=0,
MedServer1=1, MedServer2=1, MedServer3=1,
MedServer4=1,
MedServer5=1 }
AutoStartPolicy = Load
AutoStartList = { MedServer1, MedServer2, MedServer3,
MedServer4,
MedServer5 }
FailOverPolicy = Load
Load = 50
)
group Application2 (
SystemList = { LargeServer1, LargeServer2, LargeServer3,
MedServer1, MedServer2, MedServer3, MedServer4,
MedServer5 }
SystemZones = { LargeServer1=0, LargeServer2=0,
LargeServer3=0,
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Controlling VCS behavior
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MedServer1=1, MedServer2=1, MedServer3=1,
MedServer4=1,
MedServer5=1 }
AutoStartPolicy = Load
AutoStartList = { MedServer1, MedServer2, MedServer3,
MedServer4,
MedServer5 }
FailOverPolicy = Load
Load = 50
)
group Application3 (
SystemList = { LargeServer1, LargeServer2, LargeServer3,
MedServer1, MedServer2, MedServer3, MedServer4,
MedServer5 }
SystemZones = { LargeServer1=0, LargeServer2=0,
LargeServer3=0,
MedServer1=1, MedServer2=1, MedServer3=1,
MedServer4=1,
MedServer5=1 }
AutoStartPolicy = Load
AutoStartList = { MedServer1, MedServer2, MedServer3,
MedServer4,
MedServer5 }
FailOverPolicy = Load
Load = 50
)
group Application4 (
SystemList = { LargeServer1, LargeServer2, LargeServer3,
MedServer1, MedServer2, MedServer3, MedServer4,
MedServer5 }
SystemZones = { LargeServer1=0, LargeServer2=0,
LargeServer3=0,
MedServer1=1, MedServer2=1, MedServer3=1,
MedServer4=1,
MedServer5=1 }
AutoStartPolicy = Load
AutoStartList = { MedServer1, MedServer2, MedServer3,
MedServer4,
MedServer5 }
FailOverPolicy = Load
Load = 50
411
Controlling VCS behavior
Sample configurations depicting workload management
)
group Application5 (
SystemList = { LargeServer1, LargeServer2, LargeServer3,
MedServer1, MedServer2, MedServer3, MedServer4,
MedServer5 }
SystemZones = { LargeServer1=0, LargeServer2=0,
LargeServer3=0,
MedServer1=1, MedServer2=1, MedServer3=1,
MedServer4=1,
MedServer5=1 }
AutoStartPolicy = Load
AutoStartList = { MedServer1, MedServer2, MedServer3,
MedServer4,
MedServer5 }
FailOverPolicy = Load
Load = 50
)
About the AutoStart operation
Based on the preceding main.cf example, the AutoStart sequence resembles:
Database1
LargeServer1
Database2
LargeServer2
Database3
LargeServer3
Application1
MedServer1
Application2
MedServer2
Application3
MedServer3
Application4
MedServer4
Application5
MedServer5
About the normal operation
Table 11-11 shows the normal operation cluster configuration for a complex
eight-node cluster running multiple applications and large databases.
412
Controlling VCS behavior
Sample configurations depicting workload management
Table 11-11
Normal operation cluster configuration for a complex eight-node
cluster running multiple applications and large databases
Server
Available capacity
Current limits
Online groups
LargeServer1
100
ShrMemSeg=10
Database1
Semaphores=20
Processors=12
LargeServer2
100
ShrMemSeg=10
Database2
Semaphores=20
Processors=12
LargeServer3
100
ShrMemSeg=10
Database3
Semaphores=20
Processors=12
MedServer1
50
ShrMemSeg=5
Application1
Semaphores=10
Processors=6
MedServer2
50
ShrMemSeg=5
Application2
Semaphores=10
Processors=6
MedServer3
50
ShrMemSeg=5
Application3
Semaphores=10
Processors=6
MedServer4
50
ShrMemSeg=5
Application4
Semaphores=10
Processors=6
MedServer5
50
ShrMemSeg=5
Application5
Semaphores=10
Processors=6
About the failure scenario
In the following example, LargeServer3 fails. VCS scans all available systems in
the SystemList for the Database3 group for systems in the same SystemZone and
413
Controlling VCS behavior
Sample configurations depicting workload management
identifies systems that meet the group’s prerequisites. In this case, LargeServer1
and LargeServer2 meet the required Limits. Database3 is brought online on
LargeServer1. This results in the following configuration:
Table 11-12 shows the failure scenario for a complex eight-node cluster running
multiple applications and large databases.
Table 11-12
Failure scenario for a complex eight-node cluster running multiple
applications and large databases
Server
Available capacity
Current limits
Online groups
LargeServer1
0
ShrMemSeg=5
Database1 Database3
Semaphores=10
Processors=6
LargeServer2
100
ShrMemSeg=10
Database2
Semaphores=20
Processors=12
In this scenario, further failure of either system can be tolerated because each has
sufficient Limits available to accommodate the additional service group.
About the cascading failure scenario
If the performance of a database is unacceptable with two database groups running
on a single server, the SystemZones policy can help expedite performance. Failing
over a database group into the application zone has the effect of resetting the
group’s preferred zone. For example, in the above scenario Database3 was moved
to LargeServer1. The administrator could reconfigure the application zone to move
two application groups to a single system. The database application can then be
switched to the empty application server (MedServer1–MedServer5), which would
put Database3 in Zone1 (application zone). If a failure occurs in Database3, the
group selects the least-loaded server in the application zone for failover.
414
Chapter
12
The role of service group
dependencies
This chapter includes the following topics:
■
About service group dependencies
■
Service group dependency configurations
■
Frequently asked questions about group dependencies
■
About linking service groups
■
VCS behavior with service group dependencies
About service group dependencies
Service groups can be dependent on each other. The dependent group is the parent
and the other group is the child. For example a finance application (parent) may
require that the database application (child) is online before it comes online. While
service group dependencies offer more features to manage application service
groups, they create more complex failover configurations.
A service group may function both as a parent and a child. In Veritas Cluster Server,
a dependency tree may be up to five levels deep.
About dependency links
The dependency relationship between a parent and a child is called a link. The link
is characterized by the dependency category, the location of the service groups,
and the rigidity of dependency.
■
A dependency may be online, or offline.
The role of service group dependencies
About service group dependencies
■
A dependency may be local, global, or remote.
■
A dependency may be soft, firm, or hard with respect to the rigidity of the
constraints between parent and child service group.
You can customize the behavior of service groups by choosing the right combination
of the dependency category, location, and rigidity
Dependency categories
Dependency categories determine the relationship of the parent group with the
state of the child group.
Table 12-1 shows dependency categories and relationships between parent and
child service groups.
Table 12-1
Dependency categories
Dependency
Relationship between parent and child service groups
Online group
dependency
The parent group must wait for the child group to be brought online
before it can start.
For example, to configure a database application and a database service
as two separate groups, specify the database application as the parent,
and the database service as the child.
Online group dependency supports various location-based and
rigidity-based combinations.
Offline group
dependency
The parent group can be started only if the child group is offline and
vice versa. This behavior prevents conflicting applications from running
on the same system.
For example, configure a test application as the parent and the
production application as the child. The parent and child applications
can be configured on the same system or on different systems.
Offline group dependency supports only offline-local dependency.
Dependency location
The relative location of the parent and child service groups determines whether the
dependency between them is a local, global, or remote.
Table 12-2 shows the dependency locations for local, global, and remote
dependencies.
416
The role of service group dependencies
About service group dependencies
Table 12-2
Dependency
Dependency location
Relative location of the parent and child service groups
Local dependency The parent group depends on the child group being online or offline on
the same system.
Global dependency An instance of the parent group depends on one or more instances of
the child group being online on any system in the cluster.
Remote
dependency
An instance of parent group depends on one or more instances of the
child group being online on any system in the cluster other than the
system on which the parent is online.
Dependency rigidity
The type of dependency defines the rigidity of the link between parent and child
groups. A soft dependency means minimum constraints, whereas a hard dependency
means maximum constraints
Table 12-3 shows dependency rigidity and associated constraints.
Table 12-3
Dependency rigidity
Dependency
rigidity
Constraints between parent and child service groups
Soft dependency
Specifies the minimum constraints while bringing parent and child groups
online. The only constraint is that the child group must be online before
the parent group is brought online.
For example, in an online local soft dependency, an instance of the
child group must be online on the same system before the parent group
can come online.
Soft dependency provides the following flexibility:
■
■
■
■
If the child group faults, VCS does not immediately take the parent
offline. If the child group cannot fail over, the parent remains online.
When both groups are online, either group, child or parent, may be
taken offline while the other remains online.
If the parent group faults, the child group remains online.
When the link is created, the child group need not be online if the
parent is online. However, when both groups are online, their online
state must not conflict with the type of link.
417
The role of service group dependencies
About service group dependencies
Table 12-3
Dependency rigidity (continued)
Dependency
rigidity
Constraints between parent and child service groups
Firm dependency
Imposes more constraints when VCS brings the parent or child groups
online or takes them offline. In addition to the constraint that the child
group must be online before the parent group is brought online, the
constraints include:
■
■
■
■
Hard dependency
If the child group faults, the parent is taken offline. If the parent is
frozen at the time of the fault, the parent remains in its original state.
If the child cannot fail over to another system, the parent remains
offline.
If the parent group faults, the child group may remain online.
The child group cannot be taken offline if the parent group is online.
The parent group can be taken offline while the child is online.
When the link is created, the parent group must be offline. However,
if both groups are online, their online state must not conflict with the
type of link.
Imposes the maximum constraints when VCS brings the parent of child
service groups online or takes them offline. For example:
■
■
If a child group faults, the parent is taken offline before the child
group is taken offline. If the child group fails over, the parent fails
over to another system (or the same system for a local dependency).
If the child group cannot fail over, the parent group remains offline.
If the parent faults, the child is taken offline. If the child fails over,
the parent fails over. If the child group cannot fail over, the parent
group remains offline.
Note: When the child faults, if the parent group is frozen, the parent
remains online. The faulted child does not fail over.
The following restrictions apply when configuring a hard dependency:
■
Only online local hard dependencies are supported.
■
Only a single-level, parent-child relationship can be configured as
a hard dependency.
A child group can have only one online hard parent group. Likewise,
a parent group can have only one online hard child group.
Bringing the child group online does not automatically bring the
parent online.
Taking the parent group offline does not automatically take the child
offline.
Bringing the parent online is prohibited if the child is offline.
■
■
■
■
418
The role of service group dependencies
Service group dependency configurations
About dependency limitations
Following are some service group dependency limitations:
■
A group dependency tree may be at most five levels deep.
■
You cannot link two service groups whose current states violate the relationship.
For example, all link requests are accepted if all instances of parent group are
offline.
All link requests are rejected if parent group is online and child group is offline,
except in offline dependencies and in online local soft dependencies.
All online global link requests and online remote link requests to link two parallel
groups are rejected.
All online local link requests to link a parallel parent group to a failover child
group are rejected.
Service group dependency configurations
In the following tables, the term instance applies to parallel groups only. If a parallel
group is online on three systems, for example, an instance of the group is online
on each system. For failover groups, only one instance of a group is online at any
time. The default dependency type is Firm.
About failover parent / failover child
Table 12-4 shows service group dependencies for failover parent / failover child.
Table 12-4
Service group dependency configurations: Failover parent / Failover
child
Link
Failover
Failover
parent
parent is
depends on ... online If ...
If failover
child faults,
then ...
If failover
parent faults,
then ...
online local soft
Failover Child
online on same
system.
Parent stays
online.
Child stays
online.
Child is online
on same
system.
If Child fails over
to another
system, Parent
migrates to the
same system.
If Child cannot
fail over, Parent
remains online.
419
The role of service group dependencies
Service group dependency configurations
Table 12-4
Service group dependency configurations: Failover parent / Failover
child (continued)
Link
Failover
Failover
parent
parent is
depends on ... online If ...
If failover
child faults,
then ...
If failover
parent faults,
then ...
online local firm
Failover Child
online on same
system.
Parent taken
offline.
Child stays
online.
Child is online
on same
system.
If Child fails over
to another
system, Parent
migrates to the
same system.
If Child cannot
fail over, Parent
remains offline.
online local hard
online global soft
Failover Child
online on same
system.
Child is online
on same
system.
Parents taken
offline before
Child is taken
offline.
Child taken
offline.
Failover Child
online
somewhere in
the cluster.
Child is online
somewhere in
the cluster.
Parent stays
online.
Child stays
online.
If Child fails
over, Parent
If Child fails over migrates to the
to another
same system.
system, Parent
If Child cannot
migrates to the
fail over, Parent
same system.
remains offline.
If Child cannot
fail over, Parent
remains offline.
If Child fails over Parent fails over
to another
to any available
system, Parent system.
remains online.
If no failover
If Child cannot target system is
fail over, Parent available, Parent
remains online. remains offline.
420
The role of service group dependencies
Service group dependency configurations
Table 12-4
Service group dependency configurations: Failover parent / Failover
child (continued)
Link
Failover
Failover
parent
parent is
depends on ... online If ...
If failover
child faults,
then ...
If failover
parent faults,
then ...
online global firm
Failover Child
online
somewhere in
the cluster.
Child is online
somewhere in
the cluster.
Parent taken
offline after
Child is taken
offline.
Child stays
online.
Failover Child
online on
another system
in the cluster.
Child is online
on another
system in the
cluster.
If Child fails over
to the system on
which Parent
was online,
Parent migrates
to another
system.
Child stays
online.
online remote soft
Parent fails over
to any available
If Child fails over system.
to another
If no failover
system, Parent
target system is
is brought online
available, Parent
on any system.
remains offline.
If Child cannot
fail over, Parent
remains offline.
If Child fails over
to another
system, Parent
continues to run
on original
system.
Parent fails over
to a system
where Child is
not online.
If the only
system available
is where Child is
online, Parent is
not brought
online.
If no failover
If Child cannot
target system is
fail over, Parent
available, Child
remains online.
remains online.
421
The role of service group dependencies
Service group dependency configurations
Table 12-4
Link
Service group dependency configurations: Failover parent / Failover
child (continued)
Failover
Failover
parent
parent is
depends on ... online If ...
online remote firm Failover Child
online on
another system
in the cluster.
Child is online
on another
system in the
cluster.
If failover
child faults,
then ...
If failover
parent faults,
then ...
If Child fails over
to the system on
which Parent
was online,
Parent switches
to another
system.
Parent fails over
to a system
where Child is
not online.
If Child fails over
to the system on
which parent in
not running,
parent continues
running.
Parent fails over
to system on
which Child is
not online.
If the only
system available
is where Child is
If Child fails over online, Parent is
to another
not brought
system, Parent online.
restarts on
If no failover
original system.
target system is
If Child cannot available, Child
fail over, VCS
remains online.
takes the parent
offline.
offline local
Failover Child
offline on the
same system
Child is offline
on the same
system.
If no failover
target system is
If child fails over available, Child
to system on
remains online.
which parent is
running, parent
switches to
another system,
if available.
If no failover
target system is
available for
Child to fail over
to, Parent
continues
running.
422
The role of service group dependencies
Service group dependency configurations
About failover parent / parallel child
With a failover parent and parallel child, no hard dependencies are supported.
Table 12-5 shows service group dependency configurations for Failover parent /
Parallel child.
Table 12-5
Service group dependency configurations: Failover parent / Parallel
child
Link
Failover
Failover
parent is
parent
depends on ... online if ...
online local soft
Instance of
parallel Child
group on same
system.
If failover
If parallel
child faults on parent faults,
a system, then then ...
...
Instance of Child If Child instance
is online on
fails over to
same system.
another system,
the Parent also
fails over to the
same system.
Parent fails over
to other system
and depends on
Child instance
there.
Instance of Child Parent is taken
is online on
offline. Parent
same system.
fails over to
other system
and depends on
Child instance
there.
Parent fails over
to other system
and depends on
Child instance
there.
At least one
instance of Child
group is online
somewhere in
the cluster.
Parent fails over
to another
system,
maintaining
dependence on
all Child
instances.
Child Instance
If Child instance remains online
cannot failover where the
to another
Parent faulted.
system, Parent
remains online.
online local firm
online global soft
Instance of
parallel Child
group on same
system.
All instances of
parallel Child
group online in
the cluster.
Parent remains
online if Child
faults on any
system.
If Child cannot
fail over to
another system,
Parent remains
online.
Child Instance
remains online
where Parent
faulted.
423
The role of service group dependencies
Service group dependency configurations
Table 12-5
Service group dependency configurations: Failover parent / Parallel
child (continued)
Link
Failover
Failover
parent
parent is
depends on ... online if ...
If parallel
If failover
child faults on parent faults,
a system, then then ...
...
online global firm
One or more
instances of
parallel Child
group remaining
online.
Parent is taken
offline.
An instance of
Child group is
online
somewhere in
the cluster.
If another Child
instance is
online or Child
fails over,
Parent fails over
to another
system or the
same system.
Parent fails over
to another
system,
maintaining
dependence on
all Child
instances.
If no Child
instance is
online or Child
cannot fail over,
Parent remains
offline.
online remote soft
One or more
instances
parallel Child
group remaining
online on other
systems.
One or more
instances of
Child group are
online on other
systems.
Parent remains
online.
Parent fails over
to another
system,
If Child fails over
maintaining
to the system on
dependence on
which Parent is
the Child
online, Parent
instances.
fails over to
another system.
424
The role of service group dependencies
Service group dependency configurations
Table 12-5
Link
Service group dependency configurations: Failover parent / Parallel
child (continued)
Failover
Failover
parent
parent is
depends on ... online if ...
online remote firm All instances
parallel Child
group remaining
online on other
systems.
All instances of
Child group are
online on other
systems.
If parallel
If failover
child faults on parent faults,
a system, then then ...
...
Parent is taken
offline.
Parent fails over
to another
system,
If Child fails over
maintaining
to the system on
dependence on
which Parent is
all Child
online, Parent
instances.
fails over to
another system.
If Child fails over
to another
system, Parent
is brought online
on its original
system.
offline local
Parallel Child
offline on same
system.
No instance of
Child is online
on same
system.
Parent remains
online if Child
fails over to
another system.
Child remains
online and
parent fails over
to another
system where
If Child fails over
child is not
to the system on
online.
which Parent is
online, Parent
fails over.
About parallel parent / failover child
Table 12-6 shows service group dependencies for parallel parent / failover child.
Online local dependencies between parallel parent groups and failover child groups
are not supported.
425
The role of service group dependencies
Service group dependency configurations
Table 12-6
Service group dependency configurations: Parallel parent / Failover
child
Link
If parallel
Parallel parent Parallel parent If failover
instances
instances are child faults on parent faults,
a system, then then ...
depend on ... online if ...
...
online global soft
Failover Child
group online
somewhere in
the cluster.
Failover Child is Parent remains
online
online.
somewhere in
the cluster.
online global firm
Failover Child
group
somewhere in
the cluster.
Failover Child is All instances of Child stays
online
Parent taken
online.
somewhere in
offline.
the cluster.
After Child fails
over, Parent
instances are
failed over or
restarted on the
same systems.
online remote soft
Failover Child
Failover Child is If Child fails over
group on
online on
to system on
another system. another system. which Parent is
online, Parent
fails over to
other systems.
If Child fails over
to another
system, Parent
remains online.
Child remains
online
Child remains
online. Parent
tries to fail over
to another
system where
child is not
online.
426
The role of service group dependencies
Service group dependency configurations
Table 12-6
Link
Service group dependency configurations: Parallel parent / Failover
child (continued)
If parallel
Parallel parent Parallel parent If failover
instances
instances are child faults on parent faults,
a system, then then ...
depend on ... online if ...
...
online remote firm Failover Child
Failover Child is All instances of
group on
online on
Parent taken
another system. another system. offline.
Child remains
online. Parent
tries to fail over
to another
If Child fails over
system where
to system on
child is not
which Parent
online.
was online,
Parent fails over
to other
systems.
If Child fails over
to another
system, Parent
brought online
on same
systems.
offline local
Failover Child
offline on same
system.
Failover Child is Parent remains Child remains
not online on
online if Child
online.
same system.
fails over to
another system.
Child fails over
to another
system. If
Parent is online
on that system,
Parent is
brought offline.
Parent fails over
to any other
system.
About parallel parent / parallel child
Global and remote dependencies between parallel parent groups and parallel child
groups are not supported.
427
The role of service group dependencies
Service group dependency configurations
Table 12-7 shows service group dependency configurations for parallel parent /
parallel child.
Table 12-7
Service group dependency configurations: Parallel parent / Parallel
child
Link
Parallel parent Parallel parent If parallel
depends on ... is online If ... child faults,
then ...
If parallel
parent faults,
then ...
online local soft
Parallel Child
instance online
on same
system.
Parallel Child
instance is
online on same
system.
If Child fails over
to another
system, Parent
migrates to the
same system as
the Child.
Child instance
stays online.
Parallel Child
instance online
on same
system.
Parallel Child
instance is
online on same
system.
Parent taken
offline.
Child stays
online.
If Child fails over
to another
system, VCS
brings an
instance of the
Parent online on
the same
system as Child.
Parent instance
can fail over
only to system
where Child
instance is
running and
other instance of
Parent is not
running.
online local firm
Parent instance
can fail over
only to system
where Child
If Child cannot instance is
fail over, Parent running and
remains online. other instance of
Parent is not
running.
If Child cannot
fail over, Parent
remains offline.
428
The role of service group dependencies
Frequently asked questions about group dependencies
Table 12-7
Service group dependency configurations: Parallel parent / Parallel
child (continued)
Link
Parallel parent Parallel parent If parallel
depends on ... is online If ... child faults,
then ...
offline local
Parallel Child
offline on same
system.
No instance of
Child is online
on same
system.
If parallel
parent faults,
then ...
Parent remains Child remains
online if Child
online.
fails over to
Parent fails over
another system.
to a system
Parent goes
where Child is
offline if Child
not online.
fails over to a
system where
Parent is online.
Parent fails over
to another
system where
Child is not
online.
Frequently asked questions about group
dependencies
Table 12-8 lists some commonly asked questions about group dependencies.
Table 12-8
Frequently asked questions about group dependencies
Dependency
Frequently asked questions
Online local
Can child group be taken offline when parent group is online?
Soft=Yes Firm=No Hard = No.
Can parent group be switched while child group is online?
Soft=No Firm=No Hard = No.
Can child group be switched while parent group is online?
Soft=No Firm=No Hard = No.
429
The role of service group dependencies
About linking service groups
Table 12-8
Frequently asked questions about group dependencies (continued)
Dependency
Frequently asked questions
Online global
Can child group be taken offline when parent group is online?
Soft=Yes Firm=No.
Can parent group be switched while child group is running?
Soft=Yes Firm=Yes.
Can child group be switched while parent group is running?
Soft=Yes Firm=No
Online remote
Can child group be taken offline when parent group is online?
Soft=Yes Firm=No.
Can parent group be switched while child group is running?
Soft=Yes, but not to system on which child is running.
Firm=Yes, but not to system on which child is running.
Can child group be switched while parent group is running?
Soft=Yes Firm=No, but not to system on which parent is running.
Offline local
Can parent group be brought online when child group is offline?
Yes.
Can child group be taken offline when parent group is online?
Yes.
Can parent group be switched while the child group is running?
Yes, but not to system on which child is running.
Can child group be switched while the parent group is running?
Yes, but not to system on which parent is running.
About linking service groups
Note that a configuration may require that a certain service group be running before
another service group can be brought online. For example, a group containing
resources of a database service must be running before the database application
is brought online.
See “Linking service groups” on page 146.
Use the following command to link service groups from the command line
430
The role of service group dependencies
VCS behavior with service group dependencies
431
hagrp -link parent_group child_group gd_category gd_location [gd_type]
parent_group
Name of the parent group
child_group
Name of the child group
gd_category
category of group dependency (online/offline).
gd_location
the scope of dependency (local/global/remote).
gd_type
type of group dependency (soft/firm/hard). Default is firm
VCS behavior with service group dependencies
VCS enables or restricts service group operations to honor service group
dependencies. VCS rejects operations if the operation violates a group dependency.
Online operations in group dependencies
Typically, bringing a child group online manually is never rejected, except under
the following circumstances:
■
For online local dependencies, if parent is online, a child group online is rejected
for any system other than the system where parent is online.
■
For online remote dependencies, if parent is online, a child group online is
rejected for the system where parent is online.
■
For offline local dependencies, if parent is online, a child group online is rejected
for the system where parent is online.
The following examples describe situations where bringing a parallel child group
online is accepted:
■
For a parallel child group linked online local with failover/parallel parent, multiple
instances of child group online are acceptable.
■
For a parallel child group linked online remote with failover parent, multiple
instances of child group online are acceptable, as long as child group does not
go online on the system where parent is online.
■
For a parallel child group linked offline local with failover/parallel parent, multiple
instances of child group online are acceptable, as long as child group does not
go online on the system where parent is online.
The role of service group dependencies
VCS behavior with service group dependencies
Offline operations in group dependencies
VCS rejects offline operations if the procedure violates existing group dependencies.
Typically, firm dependencies are more restrictive to taking child group offline while
parent group is online. Rules for manual offline include:
■
Parent group offline is never rejected.
■
For all soft dependencies, child group can go offline regardless of the state of
parent group.
■
For all firm dependencies, if parent group is online, child group offline is rejected.
■
For the online local hard dependency, if parent group is online, child group offline
is rejected.
Switch operations in group dependencies
Switching a service group implies manually taking a service group offline on one
system, and manually bringing it back online on another system. VCS rejects manual
switch if the group does not comply with the rules for offline or online operations.
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Chapter
13
VCS event notification
This chapter includes the following topics:
■
About VCS event notification
■
Components of VCS event notification
■
About VCS events and traps
■
About monitoring aggregate events
■
About configuring notification
About VCS event notification
VCS provides a method for notifying important events such as resource or system
faults to administrators or designated recipients. VCS includes a notifier component,
which consists of the notifier process and the hanotify utility.
VCS supports SNMP consoles that can use an SNMP V2 MIB.
The notifier process performs the following tasks:
■
Receives notifications from HAD
■
Formats the notification
■
Generates an SNMP (V2) trap or sends an email to the designated recipient,
or does both.
If you have configured owners for resources, groups, or for the cluster, VCS also
notifies owners of the events that affect their resources. A resource owner is notified
of resource-related events, a group owner of group-related events, and so on.
You can also configure persons other than owners as recipients of notifications
about events of a resource, resource type, service group, system, or cluster. The
registered recipients get notifications for the events that have a severity level that
VCS event notification
About VCS event notification
is equal to or greater than the level specified. For example, if you configure recipients
for notifications and specify the severity level as Warning, VCS notifies the recipients
about events with the severity levels Warning, Error, and SevereError but not about
events with the severity level Information.
See “About attributes and their definitions” on page 606.
Figure 13-1 shows the severity levels of VCS events.
VCS event severity levels
Table 13-1
Severity level
Denotes
SevereError
Critical errors that can lead to data loss or corruption; SevereError is
the highest severity level.
Error
Faults
Warning
Deviations from normal behavior
Information
Important events that exhibit normal behavior; Information is the lowest
severity level.
Note: Severity levels are case-sensitive.
VCS event notification: Severity levels
Figure 13-1
SNMP
SMTP
SNMP
SMTP
Error
SevereError
Information
notifier
HAD
System A
HAD
System B
SNMP traps are forwarded to the SNMP console. Typically, traps are predefined
for events such as service group or resource faults. You can use the hanotify utility
to send additional traps.
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About VCS event notification
Event messages and severity levels
When the VCS engine starts up, it queues all messages of severity Information and
higher for later processing.
When notifier connects, it communicates to HAD the lowest severity threshold level
currently defined for the SNMP option or for the SMTP option.
If notifier is started from the command line without specifying a severity level for
the SNMP console or SMTP recipients, notifier communicates the default severity
level Warning to HAD. If notifier is configured under VCS control, severity must be
specified.
See the description of the NotifierMngr agent in the Veritas Cluster Server Bundled
Agents Reference Guide.
For example, if the following severities are specified for notifier:
■
Warning for email recipient 1
■
Error for email recipient 2
■
SevereError for SNMP console
Notifier communicates the minimum severity, Warning, to HAD, which then queues
all messages labelled severity level Warning and greater.
Notifier ensures that recipients receive only the messages they are designated to
receive according to the specified severity level. However, until notifier communicates
the specifications to HAD, HAD stores all messages, because it does not know the
severity the user has specified. This behavior prevents messages from being lost
between the time HAD stores them and notifier communicates the specifications
to HAD.
About persistent and replicated message queue
VCS includes a sophisticated mechanism for maintaining event messages, which
ensures that messages are not lost. On each node, VCS queues messages to be
sent to the notifier process. This queue is persistent as long as VCS is running and
the contents of this queue remain the same on each node. If the notifier service
group fails, notifier is failed over to another node in the cluster. Because the message
queue is consistent across nodes, notifier can resume message delivery from where
it left off even after failover.
How HAD deletes messages
The VCS engine, HAD, stores messages to be sent to notifier. After every 180
seconds, HAD tries to send all the pending notifications to notifier. When HAD
receives an acknowledgement from notifier that a message is delivered to at least
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Components of VCS event notification
one of the recipients, it deletes the message from its queue. For example, if two
SNMP consoles and two email recipients are designated, notifier sends an
acknowledgement to HAD even if the message reached only one of the four
recipients. If HAD does not get acknowledgement for some messages, it keeps on
sending these notifications to notifier after every 180 seconds till it gets an
acknowledgement of delivery from notifier. An error message is printed to the log
file when a delivery error occurs.
HAD deletes messages under the following conditions too:
■
The message has been in the queue for one hour and notifier is unable to deliver
the message to the recipient.
■
The message queue is full and to make room for the latest message, the earliest
message is deleted.
Components of VCS event notification
This topic describes the notifier process and the hanotify utility.
About the notifier process
The notifier process configures how messages are received from VCS and how
they are delivered to SNMP consoles and SMTP servers. Using notifier, you can
specify notification based on the severity level of the events generating the
messages. You can also specify the size of the VCS message queue, which is 30
by default. You can change this value by modifying the MessageQueue attribute.
See the Veritas Cluster Server Bundled Agents Reference Guide for more
information about this attribute.
When notifier is started from the command line, VCS does not control the notifier
process. For best results, use the NotifierMngr agent that is bundled with VCS.
Configure notifier as part of a highly available service group, which can then be
monitored, brought online, and taken offline.
For information about the agent, see the Veritas Cluster Server Bundled Agents
Reference Guide.
Note that notifier must be configured in a failover group, not parallel, because only
one instance of notifier runs in the entire cluster. Also note that notifier does not
respond to SNMP get or set requests; notifier is a trap generator only.
Notifier enables you to specify configurations for the SNMP manager and SMTP
server, including machine names, ports, community IDs, and recipients’ email
addresses. You can specify more than one manager or server, and the severity
level of messages that are sent to each.
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VCS event notification
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Note: If you start the notifier outside of VCS control, use the absolute path of the
notifier in the command. VCS cannot monitor the notifier process if it is started
outside of VCS control using a relative path.
Example of notifier command
Following is an example of a notifier command:
/opt/VRTSvcs/bin/notifier -s m=north -s
m=south,p=2000,l=Error,c=your_company
-t m=north,e="abc@your_company.com",l=SevereError
In this example, notifier:
■
Sends all level SNMP traps to north at the default SNMP port and community
value public.
■
Sends Warning traps to north.
■
Sends Error and SevereError traps to south at port 2000 and community value
your_company.
■
Sends SevereError email messages to north as SMTP server at default port
and to email recipient abc@your_company.com.
About the hanotify utility
The hanotify utility enables you to construct user-defined messages. The utility
forwards messages to HAD, which stores them in its internal message queue. Along
with other messages, user-defined messages are also forwarded to the notifier
process for delivery to email recipients, SNMP consoles, or both.
Figure 13-2 shows the hanotify utility.
hanotify utility
Figure 13-2
notifier
hanotify
had
System A
had
System B
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About VCS events and traps
Example of hanotify command
Following is an example of hanotify command:
hanotify -i 1.3.6.1.4.1.1302.3.8.10.2.8.0.10 -l Warning -n
agentres -T 7 -t "custom agent" -o 4 -S sys1 -L mv -p
sys2 -P mv -c MyAgent -C 7 -O johndoe -m "Custom message"
In this example, the number 1.3.6.1.4.1.1302.3.8.10.2.8.0.10 is the OID (Object
Identifier) for the message being sent. Because it is a user-defined message, HAD
has no way of knowing the OID associated with the SNMP trap corresponding to
this message. Users must provide the OID.
The message severity level is set to Warning. The affected systems are sys1 and
sys2. Running this command generates a custom notification with the message
"Custom message" for the resource agentres.
About VCS events and traps
This topic lists the events that generate traps, email notification, or both. Note that
SevereError indicates the highest severity level, Information the lowest. Traps
specific to global clusters are ranked from Critical, the highest severity, to Normal,
the lowest.
Events and traps for clusters
Table 13-2 shows events and traps for clusters.
Table 13-2
Events and traps for clusters
Event
Severity
level
Description
Cluster has faulted.
Error
The cluster is down because of a
fault.
Heartbeat is down.
Error
The connector on the local cluster
lost its heartbeat connection to the
remote cluster.
(Global Cluster Option)
Remote cluster is in RUNNING state.
(Global Cluster Option)
Information Local cluster has complete snapshot
of the remote cluster, indicating the
remote cluster is in the RUNNING
state.
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Table 13-2
Events and traps for clusters (continued)
Event
Severity
level
Heartbeat is "alive."
Information The heartbeat between clusters is
healthy.
(Global Cluster Option)
User has logged on to VCS.
Description
Information A user log on has been recognized
because a user logged on by Cluster
Manager, or because a haxxx
command was invoked.
Events and traps for agents
Table 13-3 depicts events and traps for agents.
Table 13-3
Events and traps for agents
Event
Severity
level
Description
Agent is faulted.
Warning
The agent has faulted on one node in the
cluster.
Agent is restarting
Information
VCS is restarting the agent.
Events and traps for resources
Table 13-4 depicts events and traps for resources.
Table 13-4
Events and traps for resources
Event
Severity
level
Description
Resource state is unknown.
Warning
VCS cannot identify the state of
the resource.
Resource monitoring has timed out.
Warning
Monitoring mechanism for the
resource has timed out.
Resource is not going offline.
Warning
VCS cannot take the resource
offline.
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VCS event notification
About VCS events and traps
Table 13-4
Events and traps for resources (continued)
Event
Severity
level
Description
Health of cluster resource declined.
Warning
Used by agents to give
additional information on the
state of a resource. A decline in
the health of the resource was
identified during monitoring.
Resource went online by itself.
Warning (not The resource was brought
for first
online on its own.
probe)
Resource has faulted.
Error
The resource has faulted on
one node in the cluster.
Resource is being restarted by agent.
Information
The agent is restarting the
resource.
The health of cluster resource improved.
Information
Used by agents to give extra
information about state of
resource. An improvement in
the health of the resource was
identified during monitoring.
Resource monitor time has changed.
Warning
This trap is generated when
statistical analysis for the time
taken by the monitor function of
an agent is enabled for the
agent.
See “ VCS agent statistics”
on page 545.
This trap is generated when the
agent framework detects a
sudden change in the time
taken to run the monitor
function for a resource. The trap
information contains details of:
■
■
The change in time required
to run the monitor function
The actual times that were
compared to deduce this
change.
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VCS event notification
About VCS events and traps
Table 13-4
Events and traps for resources (continued)
Event
Severity
level
Description
Resource is in ADMIN_WAIT state.
Error
The resource is in the
admin_wait state.
See “ About controlling Clean
behavior on resource faults”
on page 380.
Events and traps for systems
Table 13-5 depicts events and traps for systems.
Table 13-5
Events and traps for systems
Event
Severity
level
Description
VCS is being restarted by hashadow.
Warning
The hashadow process is
restarting the VCS engine.
VCS is in jeopardy.
Warning
One node running VCS is
in jeopardy.
VCS is up on the first node in the cluster.
Information
VCS is up on the first
node.
VCS has faulted.
SevereError
VCS is down because of
a fault.
A node running VCS has joined cluster.
Information
The cluster has a new
node that runs VCS.
VCS has exited manually.
Information
VCS has exited gracefully
from one node on which it
was previously running.
CPU usage exceeded threshold on the system.
Warning
The system’s CPU usage
exceeded the Warning
threshold level set in the
CPUThreshold attribute.
Swap usage exceeded threshold on the system. Warning
The system’s swap usage
exceeded the Warning
threshold level set in the
SwapThreshold attribute.
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About VCS events and traps
Events and traps for service groups
Table 13-6 depicts events and traps for service groups.
Table 13-6
Events and traps for service groups
Event
Severity level Description
Service group has faulted.
Error
The service group is offline
because of a fault.
Service group concurrency violation.
SevereError
A failover service group has
become online on more than
one node in the cluster.
Service group has faulted and cannot be
failed over anywhere.
SevereError
Specified service group faulted
on all nodes where group
could be brought online. There
are no nodes to which the
group can fail over.
Service group is online
Information
The service group is online.
Service group is offline.
Information
The service group is offline.
Service group is autodisabled.
Information
VCS has autodisabled the
specified group because one
node exited the cluster.
Service group is restarting.
Information
The service group is restarting.
Service group is being switched.
Information
VCS is taking the service
group offline on one node and
bringing it online on another.
Service group restarting in response to
persistent resource going online.
Information
The service group is restarting
because a persistent resource
recovered from a fault.
The global service group is online/partial
on multiple clusters.
SevereError
A concurrency violation
occurred for the global service
group.
Error
The attributes ClusterList,
AutoFailOver, and Parallel are
mismatched for the same
global service group on
different clusters.
(Global Cluster Option)
Attributes for global service groups are
mismatched.
(Global Cluster Option)
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SNMP-specific files
VCS includes two SNMP-specific files: vcs.mib and vcs_trapd, which are created
in:
%VCS_HOME%\snmp.
The file vcs.mib is the textual MIB for built-in traps that are supported by VCS. Load
this MIB into your SNMP console to add it to the list of recognized traps.
The file vcs_trapd is specific to the HP OpenView Network Node Manager (NNM)
SNMP console. The file includes sample events configured for the built-in SNMP
traps supported by VCS. To merge these events with those configured for SNMP
traps:
xnmevents -merge vcs_trapd
When you merge events, the SNMP traps sent by VCS by way of notifier are
displayed in the HP OpenView NNM SNMP console.
Note: For more information on xnmevents, see the HP OpenView documentation.
Trap variables in VCS MIB
Traps sent by VCS are reversible to SNMPv2 after an SNMPv2 to SNMPv1
conversion.
For reversible translations between SNMPv1 and SNMPv2 trap PDUs, the
second-last ID of the SNMP trap OID must be zero. This ensures that once you
make a forward translation (SNMPv2 trap to SNMPv1; RFC 2576 Section 3.2), the
reverse translation (SNMPv1 trap to SNMPv2 trap; RFC 2576 Section 3.1) is
accurate.
The VCS notifier follows this guideline by using OIDs with second-last ID as zero,
enabling reversible translations.
About severityId
This variable indicates the severity of the trap being sent.
Table 13-7 shows the values that the variable severityId can take.
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VCS event notification
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Table 13-7
Possible values of the variable severityId
Severity level and description
Value in trap PDU
Information
0
Important events exhibiting normal behavior
Warning
1
Deviation from normal behavior
Error
2
A fault
Severe Error
3
Critical error that can lead to data loss or corruption
EntityType and entitySubType
These variables specify additional information about the entity.
Table 13-8 shows the variables entityType and entitySubType.
Table 13-8
Variables entityType and entitySubType
Entity type
Entity sub-type
Resource
String. For example, disk.
Group
String
The type of the group (failover or parallel)
System
Heartbeat
String
Type of the heartbeat
VCS
String
GCO
String
Agent name
String
The agent name
About entityState
This variable describes the state of the entity.
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VCS event notification
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Table 13-9 shows the the various states.
Table 13-9
Possible states
Entity
States
VCS states
■
User has logged into VCS
■
Cluster has faulted
■
Cluster is in RUNNING state
■
Agent is restarting
■
Agent has faulted
■
Resource state is unknown
■
Resource monitoring has timed out
■
Resource is not going offline
■
Resource is being restarted by agent
■
Resource went online by itself
■
Resource has faulted
■
Resource is in admin wait state
■
Resource monitor time has changed
■
Service group is online
■
Service group is offline
■
Service group is auto disabled
■
Service group has faulted
■
Service group has faulted and cannot be failed over anywhere
■
Service group is restarting
■
Service group is being switched
■
Service group concurrency violation
■
■
Service group is restarting in response to persistent resource
going online
Service group attribute value does not match corresponding
remote group attribute value
Global group concurrency violation
■
VCS is up on the first node in the Cluster
■
VCS is being restarted by hashadow
■
VCS is in jeopardy
■
VCS has faulted
■
A node running VCS has joined cluster
■
VCS has exited manually
■
CPU usage exceeded the threshold on the system
Agent states
Resources states
Service group states
■
System states
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VCS event notification
About monitoring aggregate events
Table 13-9
Possible states (continued)
Entity
States
GCO heartbeat states
■
Cluster has lost heartbeat with remote cluster
■
Heartbeat with remote cluster is alive
About monitoring aggregate events
This topic describes how you can detect aggregate events by monitoring individual
notifications.
How to detect service group failover
VCS does not send any explicit traps when a failover occurs in response to a service
group fault. When a service group faults, VCS generates the following notifications
if the AutoFailOver attribute for the service group is set to 1:
■
Service Group Fault for the node on which the service group was online and
faulted
■
Service Group Offline for the node on which the service group faulted
■
Service Group Online for the node to which the service group failed over
How to detect service group switch
When a service group is switched, VCS sends a notification of severity Information
to indicate the following events:
■
Service group is being switched.
■
Service group is offline for the node from which the service group is switched.
■
Service group is online for the node to which the service group was switched.
This notification is sent after VCS completes the service group switch operation.
Note: You must configure appropriate severity for the notifier to receive these
notifications. To receive VCS notifications, the minimum acceptable severity level
is Information.
About configuring notification
Configuring notification involves creating a resource for the Notifier Manager
(NotifierMgr) agent in the ClusterService group.
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VCS event notification
About configuring notification
See the Veritas Cluster Server Bundled Agents Reference Guide for more
information about the agent.
VCS provides several methods for configuring notification:
■
Manually editing the main.cf file.
■
Using the Notifier wizard.
See “Setting up VCS event notification by using the Notifier wizard” on page 173.
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Chapter
14
VCS event triggers
This chapter includes the following topics:
■
About VCS event triggers
■
Using event triggers
■
List of event triggers
About VCS event triggers
Triggers let you invoke user-defined scripts for specified events in a cluster.
VCS determines if the event is enabled and invokes the hatrigger script. The
script is located at:
%VCS_HOME%\bin\hatrigger.pl
VCS also passes the name of the event trigger and associated parameters. For
example, when a service group comes online on a system, VCS invokes the following
command:
hatrigger -postonline system service_group
VCS does not wait for the trigger to complete execution. VCS calls the trigger and
continues normal operation.
VCS invokes event triggers on the system where the event occurred, with the
following exceptions:
■
VCS invokes the sysoffline and nofailover event triggers on the lowest-numbered
system in the RUNNING state.
■
VCS invokes the violation event trigger on all systems on which the service
group was brought partially or fully online.
VCS event triggers
Using event triggers
By default, the hatrigger script invokes the trigger script(s) from the default path
$VCS_HOME/bin/triggers. You can customize the trigger path by using the
TriggerPath attribute.
See “Resource attributes” on page 607.
See “Service group attributes” on page 626.
The same path is used on all nodes in the cluster. The trigger path must exist on
all the cluster nodes. On each cluster node, the trigger scripts must be installed in
the trigger path.
Using event triggers
VCS provides a sample Perl script for each event trigger at the following location:
%VCS_HOME%\bin\sample_triggers
Customize the scripts according to your requirements: you may choose to write
your own Perl scripts.
To use an event trigger
1
Use the sample scripts to write your own custom actions for the trigger.
2
Move the modified trigger script to the following path on each node:
%VCS_HOME%\bin\triggers
3
Configure other attributes that may be required to enable the trigger. See the
usage information for the trigger for more information.
List of event triggers
The information in the following sections describes the various event triggers,
including their usage, parameters, and location.
About the dumptunables trigger
The following table describes the dumptunables event trigger:
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Description The dumptunables trigger is invoked when HAD goes into the RUNNING state.
When this trigger is invoked, it uses the HAD environment variables that it
inherited, and other environment variables to process the event. Depending on
the value of the to_log parameter, the trigger then redirects the environment
variables to either stdout or the engine log.
This trigger is not invoked when HAD is restarted by hashadow.
This event trigger is internal and non-configurable.
Usage
-dumptunables triggertype system to_log
triggertype—represents whether trigger is custom (triggertype=0) or internal
(triggertype=1).
For this trigger, triggertype=0.
system—represents the name of the system on which the trigger is invoked.
to_log—represents whether the output is redirected to engine log (to_log=1) or
stdout (to_log=0).
About the injeopardy event trigger
The following table describes the injeopardy event trigger:
Description
Invoked when a system is in jeopardy. Specifically, this trigger is invoked
when a system has only one remaining link to the cluster, and that link
is a network link (LLT). This event is considered critical because if the
system loses the remaining network link, VCS does not fail over the
service groups that were online on the system. Use this trigger to notify
the administrator of the critical event. The administrator can then take
appropriate action to ensure that the system has at least two links to
the cluster.
This event trigger is non-configurable.
Usage
-injeopardy triggertype system system_state
triggertype—represents whether trigger is custom (triggertype=0) or
internal (triggertype=1).
For this trigger, triggertype=0.
system—represents the name of the system.
system_state—represents the value of the State attribute.
About the loadwarning event trigger
The following table describes the loadwarning event trigger:
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Description
Invoked when a system becomes overloaded because the load of the
system’s online groups exceeds the system’s LoadWarningLevel
attribute for an interval exceeding the LoadTimeThreshold attribute.
For example, assume that the Capacity is 150, the LoadWarningLevel
is 80, and the LoadTimeThreshold is 300. Also, the sum of the Load
attribute for all online groups on the system is 135. Because the
LoadWarningLevel is 80, safe load is 0.80*150=120. The trigger is
invoked if the system load stays at 135 for more than 300 seconds
because the actual load is above the limit of 120 specified by
LoadWarningLevel.
Use this trigger to notify the administrator of the critical event. The
administrator can then switch some service groups to another system,
ensuring that no one system is overloaded.
This event trigger is non-configurable.
Usage
-loadwarning triggertype system available_capacity
triggertype—represents whether trigger is custom (triggertype=0) or
internal (triggertype=1).
For this trigger, triggertype=0.
system—represents the name of the system.
available_capacity—represents the system’s AvailableCapacity attribute.
(AvailableCapacity=Capacity-sum of Load for system’s online groups.)
About the nofailover event trigger
The following table describes the nofailover event trigger:
Description
Called from the lowest-numbered system in RUNNING state when a
service group cannot fail over.
This event trigger is non-configurable.
Usage
-nofailover triggertype system service_group
triggertype—represents whether trigger is custom (triggertype=0) or
internal (triggertype=1).
For this trigger, triggertype=0.
system—represents the name of the last system on which an attempt
was made to bring the service group online.
service_group—represents the name of the service group.
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About the postoffline event trigger
The following table describes the postoffline event trigger:
Description
This event trigger is invoked on the system where the group went offline
from a partial or fully online state. This trigger is invoked when the group
faults, or is taken offline manually.
This event trigger is non-configurable.
Usage
-postoffline triggertype system service_group
triggertype—represents whether trigger is custom (triggertype=0) or
internal (triggertype=1).
For this trigger, triggertype=0.
system—represents the name of the system.
service_group—represents the name of the service group that went
offline.
About the postonline event trigger
The following table describes the postonline event trigger:
Description
This event trigger is invoked on the system where the group went online
from an offline state.
This event trigger is non-configurable.
Usage
-postonline triggertype system service_group
triggertype—represents whether trigger is custom (triggertype=0) or
internal (triggertype=1).
For this trigger, triggertype=0.
system—represents the name of the system.
service_group—represents the name of the service group that went
online.
About the preonline event trigger
The following table describes the preonline event trigger:
452
VCS event triggers
List of event triggers
Description
Indicates when the HAD should call a user-defined script before bringing
a service group online in response to the hagrp -online command
or a fault.
If the trigger does not exist, VCS continues to bring the group online.
If the script returns 0 without an exit code, VCS runs the hagrp
-online -nopre command, with the -checkpartial option if
appropriate.
If you do want to bring the group online, define the trigger to take no
action. This event trigger is configurable.
Usage
-preonline triggertype system service_group
whyonlining [system_where_group_faulted]
triggertype—represents whether trigger is custom (triggertype=0) or
internal (triggertype=1).
For this trigger, triggertype=0.
system—represents the name of the system.
service_group—represents the name of the service group on which the
hagrp command was issued or the fault occurred.
whyonlining—represents two values:
FAULT: Indicates that the group was brought online in response to a
group failover.
MANUAL: Indicates that group was brought online or switched manually
on the system that is represented by the variable system.
system_where_group_faulted—represents the name of the system on
which the group has faulted or switched. This variable is optional and
set when the engine invokes the trigger during a failover or switch.
To enable the
trigger
Set the PreOnline attribute in the service group definition to 1.
To disable the
trigger
Set the PreOnline attribute in the service group definition to 0.
You can set a local (per-system) value for the attribute to control
behavior on each node in the cluster.
You can set a local (per-system) value for the attribute to control
behavior on each node in the cluster.
About the resadminwait event trigger
The following table describes the resadminwait event trigger:
453
VCS event triggers
List of event triggers
Description
Invoked when a resource enters ADMIN_WAIT state.
When VCS sets a resource in the ADMIN_WAIT state, it invokes the
resadminwait trigger according to the reason the resource entered the
state.
See “Clearing resources in the ADMIN_WAIT state” on page 380.
This event trigger is non-configurable.
Usage
-resadminwait system resource adminwait_reason
system—represents the name of the system.
resource—represents the name of the faulted resource.
adminwait_reason—represents the reason the resource entered the
ADMIN_WAIT state. Values range from 0-5:
0 = The offline function did not complete within the expected time.
1 = The offline function was ineffective.
2 = The online function did not complete within the expected time.
3 = The online function was ineffective.
4 = The resource was taken offline unexpectedly.
5 = The monitor function consistently failed to complete within the
expected time.
About the resfault event trigger
The following table describes the resfault event trigger:
Description
Invoked on the system where a resource has faulted. Note that when
a resource is faulted, resources within the upward path of the faulted
resource are also brought down.
This event trigger is configurable.
To configure this trigger, you must define the following:
TriggerResFault: Set the attribute to 1 to invoke the trigger when a
resource faults.
454
VCS event triggers
List of event triggers
Usage
-resfault triggertype system resource previous_state
triggertype—represents whether trigger is custom (triggertype=0) or
internal (triggertype=1).
For this trigger, triggertype=0.
system—represents the name of the system.
resource—represents the name of the faulted resource.
previous_state—represents the resource’s previous state.
To enable the
trigger
To invoke the trigger when a resource faults, set the TriggerResFault
attribute to 1.
About the resnotoff event trigger
The following table describes the resnotoff event trigger:
455
VCS event triggers
List of event triggers
Description
Invoked on the system if a resource in a service group does not go
offline even after issuing the offline command to the resource.
When invoked, the trigger script waits for a predefined interval and
checks the state of the resource. If the resource is not offline, the trigger
issues a system shutdown command, followed by the command
hastop -local -evacuate.
This event trigger is configurable.
To configure this trigger, you must define the following:
Resource Name Define resources for which to invoke this trigger by
entering their names in the following line in the script: @resources =
("resource1", "resource2");
If any of these resources do not go offline, the trigger is invoked with
that resource name and system name as arguments to the script.
$shutdown_timeout Define the time the script waits before it checks
the resource state and issues a system shutdown command. For
example, if this variable is set to 300, the script waits for 300 seconds
before checking that the resource is offline and issuing the shutdown
command.
$shutdown_countdown Define the time the script waits to shut down
the system after issuing the hastop -local -evacuate command.
For example, the value 300 indicates that the script waits for 300
seconds after issuing the hastop -local -evacuate command,
and then shuts down the system.
Define this value to be greater than the time required to switch all service
groups on the system to another system.
$forced_close_app Define whether the script forcefully closes all
running applications when it triggers the system shutdown command.
The value 1 indicates the script forcefully closes all running applications.
The value 0 indicates it does not. Default is 1.
$reboot_option Define whether the script reboots the system after
issuing the system shutdown command. The value 1 indicates the script
reboots the system. The value 0 indicates it does not. Default is 1.
Usage
-resnotoff triggertype system resource
triggertype—represents whether trigger is custom (triggertype=0) or
internal (triggertype=1).
For this trigger, triggertype=0.
system—represents the system on which the resource is not going
offline.
resource—represents the name of the resource.
456
VCS event triggers
List of event triggers
About the resrestart event trigger
The following table describes the resrestart event trigger.
Description This trigger is invoked when a resource is restarted by an agent because resource
faulted and RestartLimit was greater than 0.
Usage
-resrestart triggertype system resource
triggertype—represents whether trigger is custom (triggertype=0) or internal
(triggertype=1).
For this trigger, triggertype=0.
system—represents the name of the system.
resource—represents the name of the resource.
To enable This event trigger is not enabled by default. You must enable resrestart by setting
the trigger the attribute TriggerResRestart to 1 in the main.cf file, or by issuing the command:
hagrp -modify service_group TriggerResRestart 1
However, the attribute is configurable at the resource level. To enable resrestart
for a particular resource, you can set the attribute TriggerResRestart to 1 in the
main.cf file or issue the command:
hares -modify resource TriggerResRestart 1
About the resstatechange event trigger
The following table describes the resstatechange event trigger:
457
VCS event triggers
List of event triggers
Description
This trigger is invoked under the following conditions:
Resource goes from OFFLINE to ONLINE.
Resource goes from ONLINE to OFFLINE.
Resource goes from ONLINE to FAULTED.
Resource goes from FAULTED to OFFLINE. (When fault is cleared on
non-persistent resource.)
Resource goes from FAULTED to ONLINE. (When faulted persistent
resource goes online or faulted non-persistent resource is brought
online outside VCS control.)
Resource is restarted by an agent because resource faulted and
RestartLimit was greater than 0.
Warning: In later releases, you cannot use resstatechange to indicate
restarting of a resource. Instead, use resrestart. See “About the
resrestart event trigger” on page 457.
This event trigger is configurable.
Usage
-resstatechange triggertype system resource
previous_state new_state
triggertype—represents whether trigger is custom (triggertype=0) or
internal (triggertype=1).
For this trigger, triggertype=0.
system—represents the name of the system.
resource—represents the name of the resource.
previous_state—represents the resource’s previous state.
new_state—represents the resource’s new state.
458
VCS event triggers
List of event triggers
To enable the
trigger
This event trigger is not enabled by default. You must enable
resstatechange by setting the attribute TriggerResStateChange to 1 in
the main.cf file, or by issuing the command:
hagrp -modify service_group TriggerResStateChange 1
Use the resstatechange trigger carefully. For example, enabling this
trigger for a service group with 100 resources means that 100 hatrigger
processes and 100 resstatechange processes are fired each time the
group is brought online or taken offline. Also, this is not a "wait-mode
trigger. Specifically, VCS invokes the trigger and does not wait for trigger
to return to continue operation.
However, the attribute is configurable at the resource level. To enable
resstatechange for a particular resource, you can set the attribute
TriggerResStateChange to 1 in the main.cf file or issue the command:
hares -modify resource TriggerResStateChange 1
About the sysoffline event trigger
The following table describes the sysoffline event trigger:
Description
Called from the lowest-numbered system in RUNNING state when a
system leaves the cluster.
This event trigger is non-configurable.
Usage
-sysoffline system system_state
system—represents the name of the system.
system_state—represents the value of the State attribute.
See “System states” on page 603.
About the unable_to_restart_agent event trigger
The following table describes the unable_to_restart_agent event trigger:
Description
This trigger is invoked when an agent faults more than a predetermined
number of times with in an hour. When this occurs, VCS gives up trying
to restart the agent. VCS invokes this trigger on the node where the
agent faults.
You can use this trigger to notify the administrators that an agent has
faulted, and that VCS is unable to restart the agent. The administrator
can then take corrective action.
459
VCS event triggers
List of event triggers
Usage
-unable_to_restart_agent system resource_type
system—represents the name of the system.
resource_type—represents the resource type associated with the agent.
To disable the
trigger
Remove the files associated with the trigger from the
$VCS_HOME/bin/triggers directory.
About the unable_to_restart_had event trigger
The following table describes the unable_to_restart_had event trigger:
Description
This event trigger is invoked by hashadow when hashadow cannot
restart HAD on a system. If HAD fails to restart after six attempts,
hashadow invokes the trigger on the system.
The default behavior of the trigger is to reboot the system. However,
service groups previously running on the system are autodisabled when
hashadow fails to restart HAD. Before these service groups can be
brought online elsewhere in the cluster, you must autoenable them on
the system. To do so, customize the unable_to_restart_had trigger to
remotely execute the following command from any node in the cluster
where VCS is running:
hagrp -autoenable service_group -sys system
For example, if hashadow fails to restart HAD on system1, and if group1
and group2 were online on that system, a trigger customized in this
manner would autoenable group1 and group2 on system1 before
rebooting. Autoenabling group1 and group2 on system1 enables these
two service groups to come online on another system when the trigger
reboots system1.
This event trigger is non-configurable.
Usage
-unable_to_restart_had
This trigger has no arguments.
About the violation event trigger
The following table describes the violation event trigger:
460
VCS event triggers
List of event triggers
Description
This trigger is invoked only on the system that caused the concurrency
violation. Specifically, it takes the service group offline on the system
where the trigger was invoked. Note that this trigger applies to failover
groups only. The default trigger takes the service group offline on the
system that caused the concurrency violation.
This event trigger is internal and non-configurable.
Usage
-violation system service_group
system—represents the name of the system.
service_group—represents the name of the service group that was fully
or partially online.
461
Section
4
Cluster configurations for
disaster recovery
■
Chapter 15. Connecting clusters–Creating global clusters
■
Chapter 16. Administering global clusters from Cluster Manager (Java console)
■
Chapter 17. Administering global clusters from the command line
■
Chapter 18. Setting up replicated data clusters
Chapter
15
Connecting
clusters–Creating global
clusters
This chapter includes the following topics:
■
How VCS global clusters work
■
VCS global clusters: The building blocks
■
Prerequisites for global clusters
■
Setting up a global cluster
■
About cluster faults
■
About setting up a disaster recovery fire drill
■
Multi-tiered application support using the RemoteGroup agent in a global
environment
■
Test scenario for a multi-tiered environment
How VCS global clusters work
Local clustering provides local failover for each site or building. But, these
configurations do not provide protection against large-scale disasters such as major
floods, hurricanes, and earthquakes that cause outages for an entire city or region.
The entire cluster could be affected by an outage.
In such situations, VCS global clusters ensure data availability by migrating
applications to remote clusters located considerable distances apart.
Connecting clusters–Creating global clusters
VCS global clusters: The building blocks
Let us take the example of an Oracle database configured in a VCS global cluster.
Oracle is installed and configured in both clusters. Oracle data is located on shared
disks within each cluster and is replicated across clusters to ensure data
concurrency. The Oracle service group is online on a system in cluster A and is
configured to fail over globally, on clusters A and B.
Figure 15-1 shows a sample global cluster setup.
Sample global cluster setup
Figure 15-1
Client
Cluster A
Client
Client
Public
Network
Client
Clients
Redirected
Cluster B
Application
Failover
Oracle
Group
Oracle
Group
Replicated
Data
Separate
Storage
Separate
Storage
VCS continuously monitors and communicates events between clusters. Inter-cluster
communication ensures that the global cluster is aware of the state of the service
groups that are configured in the global cluster at all times.
In the event of a system or application failure, VCS fails over the Oracle service
group to another system in the same cluster. If the entire cluster fails, VCS fails
over the service group to the remote cluster, which is part of the global cluster. VCS
also redirects clients once the application is online on the new location.
VCS global clusters: The building blocks
VCS extends clustering concepts to wide-area high availability and disaster recovery
with the following:
■
Remote cluster objects
See “ Visualization of remote cluster objects” on page 465.
■
Global service groups
See “About global service groups” on page 465.
■
Global cluster management
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Connecting clusters–Creating global clusters
VCS global clusters: The building blocks
See “About global cluster management” on page 465.
■
Serialization
See “About serialization–The Authority attribute” on page 467.
■
Resiliency and right of way
See “About resiliency and "Right of way"” on page 468.
■
VCS agents to manage wide-area failover
See “ VCS agents to manage wide-area failover” on page 468.
■
Split-brain in two-cluster global clusters
See “About the Steward process: Split-brain in two-cluster global clusters”
on page 468.
■
Secure communication
See “ Secure communication in global clusters” on page 469.
Visualization of remote cluster objects
VCS enables you to visualize remote cluster objects using any of the supported
components that are used to administer VCS.
See “ Components for administering VCS” on page 41.
You can define remote clusters in your configuration file, main.cf. The Remote
Cluster Configuration wizard provides an easy interface to do so. The wizard updates
the main.cf files of all connected clusters with the required configuration changes.
See “Adding a remote cluster” on page 498.
About global service groups
A global service group is a regular VCS group with additional properties to enable
wide-area failover. The global service group attribute ClusterList defines the list of
clusters to which the group can fail over. The service group must be configured on
all participating clusters and must have the same name on each cluster. The Global
Group Configuration Wizard provides an easy interface to configure global groups.
See “Administering global service groups” on page 505.
About global cluster management
VCS enables you to perform operations (online, offline, switch) on global service
groups from any system in any cluster. You must log on with adequate privileges
for cluster operations.
See “User privileges in global clusters” on page 73.
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Connecting clusters–Creating global clusters
VCS global clusters: The building blocks
You can bring service groups online or switch them to any system in any cluster.
If you do not specify a target system, VCS uses the FailOverPolicy to determine
the system.
See “About defining failover policies” on page 378.
Management of remote cluster objects is aided by inter-cluster communication
enabled by the wide-area connector (wac) process.
About the wide-area connector process
The wide-area connector (wac) is a failover Process resource that ensures
communication between clusters.
Figure 15-2 is an illustration of the wide-area connector process.
Wide-area connector (wac) process
Figure 15-2
App
Group
HAD
App
Group
HAD
Cluster 1
App
Group
App
Group
wac
Process
wac
Process
HAD
HAD
App
Group
HAD
App
Group
HAD
Cluster 2
The wac process runs on one system in each cluster and connects with peers in
remote clusters. It receives and transmits information about the status of the cluster,
service groups, and systems. This communication enables VCS to create a
consolidated view of the status of all the clusters configured as part of the global
cluster. The process also manages wide-area heartbeating to determine the health
of remote clusters. The process also transmits commands between clusters and
returns the result to the originating cluster.
VCS provides the option of securing the communication between the wide-area
connectors.
See “ Secure communication in global clusters” on page 469.
About the wide-area heartbeat agent
The wide-area heartbeat agent manages the inter-cluster heartbeat. Heartbeats
are used to monitor the health of remote clusters. VCS wide-area hearbeat agents
include Icmp and IcmpS. While other VCS resource agents report their status to
VCS engine, heartbeat agents report their status directly to the WAC process. The
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Connecting clusters–Creating global clusters
VCS global clusters: The building blocks
heartbeat name must be the same as the heartbeat type name. You can add only
one heartbeat of a specific heartbeat type.
You can create custom wide-area heartbeat agents. For example, the VCS
replication agent for SRDF includes a custom heartbeat agent for Symmetrix arrays.
You can add heartbeats using the hahb -add heartbeatname command and
change the default values of the heartbeat agents using the hahb -modify
command.
See “Administering heartbeats in a global cluster setup” on page 525.
See “Heartbeat attributes (for global clusters)” on page 665.
About serialization–The Authority attribute
VCS ensures that multi-cluster service group operations are conducted serially to
avoid timing problems and to ensure smooth performance. The Authority attribute
prevents a service group from coming online in multiple clusters at the same time.
Authority is a persistent service group attribute and it designates which cluster has
the right to bring a global service group online. The attribute cannot be modified at
runtime.
If two administrators simultaneously try to bring a service group online in a
two-cluster global group, one command is honored, and the other is rejected based
on the value of the Authority attribute.
The attribute prevents bringing a service group online in a cluster that does not
have the authority to do so. If the cluster holding authority is down, you can enforce
a takeover by using the command hagrp -online -force service_group. This
command enables you to fail over an application to another cluster when a disaster
occurs.
Note: A cluster assuming authority for a group does not guarantee the group will
be brought online on the cluster. The attribute merely specifies the right to attempt
bringing the service group online in the cluster. The presence of Authority does not
override group settings like frozen, autodisabled, non-probed, and so on, that prevent
service groups from going online.
You must seed authority if it is not held on any cluster.
Offline operations on global groups can originate from any cluster and do not require
a change of authority to do so, because taking a group offline does not necessarily
indicate an intention to perform a cross-cluster failover.
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Connecting clusters–Creating global clusters
VCS global clusters: The building blocks
About the Authority and AutoStart attributes
The attributes Authority and AutoStart work together to avoid potential concurrency
violations in multi-cluster configurations.
If the AutoStartList attribute is set, and if a group’s Authority attribute is set to 1,
the VCS engine waits for the wac process to connect to the peer. If the connection
fails, it means the peer is down and the AutoStart process proceeds. If the
connection succeeds, HAD waits for the remote snapshot. If the peer is holding the
authority for the group and the remote group is online (because of takeover), the
local cluster does not bring the group online and relinquishes authority.
If the Authority attribute is set to 0, AutoStart is not invoked.
About resiliency and "Right of way"
VCS global clusters maintain resiliency using the wide-area connector process and
the ClusterService group. The wide-area connector process runs as long as there
is at least one surviving node in a cluster.
The wide-area connector, its alias, and notifier are components of the ClusterService
group.
VCS agents to manage wide-area failover
VCS agents now manage external objects that are part of wide-area failover. These
objects include replication, DNS updates, and so on. These agents provide a robust
framework for specifying attributes and restarts, and can be brought online upon
fail over.
About the Steward process: Split-brain in two-cluster global clusters
Failure of all heartbeats between any two clusters in a global cluster indicates one
of the following:
■
The remote cluster is faulted.
■
All communication links between the two clusters are broken.
In global clusters with more than three clusters, VCS queries the connected clusters
to confirm that the remote cluster is truly down. This mechanism is called inquiry.
In a two-cluster setup, VCS uses the Steward process to minimize chances of a
wide-area split-brain. The process runs as a standalone binary on a system outside
of the global cluster configuration.
Figure 15-3 depicts the Steward process to minimize chances of a split brain within
a two-cluster setup.
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Connecting clusters–Creating global clusters
VCS global clusters: The building blocks
Figure 15-3
Steward process: Split-brain in two-cluster global clusters
Cluster B
Cluster A
Steward
When all communication links between any two clusters are lost, each cluster
contacts the Steward with an inquiry message. The Steward sends an ICMP ping
to the cluster in question and responds with a negative inquiry if the cluster is running
or with positive inquiry if the cluster is down. The Steward can also be used in
configurations with more than two clusters. VCS provides the option of securing
communication between the Steward process and the wide-area connectors.
See “ Secure communication in global clusters” on page 469.
In non-secure configurations, you can configure the steward process on a platform
that is different to that of the global cluster nodes. Secure configurations have not
been tested for running the steward process on a different platform.
A Steward is effective only if there are independent paths from each cluster to the
host that runs the Steward. If there is only one path between the two clusters, you
must prevent split-brain by confirming manually via telephone or some messaging
system with administrators at the remote site if a failure has occurred. By default,
VCS global clusters fail over an application across cluster boundaries with
administrator confirmation. You can configure automatic failover by setting the
ClusterFailOverPolicy attribute to Auto.
The default port for the steward is 14156.
Secure communication in global clusters
In global clusters, VCS provides the option of making the following types of
communication secure:
■
Communication between the wide-area connectors.
■
Communication between the wide-area connectors and the Steward process.
For secure authentication, the wide-area connector process gets a security context
as an account in the local authentication broker on each cluster node.
The WAC account belongs to the same domain as HAD and Command Server and
is specified as:
469
Connecting clusters–Creating global clusters
Prerequisites for global clusters
name = WAC
domain = VCS_SERVICES@cluster_uuid
See “Cluster attributes” on page 655.
You must configure the wide-area connector process in all clusters to run in secure
mode. If the wide-area connector process runs in secure mode, you must run the
Steward in secure mode.
See “Configuring the Steward process (optional)” on page 479.
See “ Prerequisites for clusters running in secure mode” on page 472.
Prerequisites for global clusters
This topic describes the prerequisites for configuring global clusters.
Prerequisites for cluster setup
You must have at least two clusters to set up a global cluster. Every cluster must
have the required licenses. A cluster can be part of only one global cluster. VCS
supports a maximum of four clusters participating in a global cluster.
Clusters must be running on the same platform. The operating system versions
must also be the same. Clusters must be using the same VCS version.
Cluster names must be unique within each global cluster; system and resource
names need not be unique across clusters. Service group names need not be
unique across clusters; however, global service groups must have identical names.
Every cluster must have a valid virtual IP address, which is tied to the cluster. Define
this IP address in the cluster’s ClusterAddress attribute. This address is normally
configured as part of the initial VCS installation. The IP address must have a DNS
entry.
All clusters in a global cluster must use either IPv4 or IPv6 addresses. VCS does
not support configuring clusters that use different Internet Protocol versions in a
global cluster.
For remote cluster operations, you must configure a VCS user with the same name
and privileges in each cluster.
See “User privileges in global clusters” on page 73.
Prerequisites for application setup
Applications to be configured as global groups must be configured to represent
each other in their respective clusters. All application groups in a global group must
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Connecting clusters–Creating global clusters
Prerequisites for global clusters
have the same name in each cluster. The individual resources of the groups can
be different. For example, one group might have a MultiNIC resource or more
Mount-type resources. Client systems redirected to the remote cluster in case of a
wide-area failover must be presented with the same application they saw in the
primary cluster.
However, the resources that make up a global group must represent the same
application from the point of the client as its peer global group in the other cluster.
Clients redirected to a remote cluster should not be aware that a cross-cluster
failover occurred, except for some downtime while the administrator initiates or
confirms the failover.
Prerequisites for wide-area heartbeats
There must be at least one wide-area heartbeat going from each cluster to every
other cluster. VCS starts communicating with a cluster only after the heartbeat
reports that the cluster is alive. VCS uses the ICMP ping by default, the infrastructure
for which is bundled with the product. VCS configures the Icmp heartbeat if you
use Cluster Manager (Java Console) to set up your global cluster. Other heartbeats
must be configured manually.
Although multiple heartbeats can be configured but one heartbeat is sufficient to
monitor the health of the remote site. Because Icmp & IcmpS heartbeats use IP
network to check the health of the remote site. Even one heartbeat is not a single
point of failure if the network is sufficiently redundant. Adding multiple heartbeats
will not be useful if they have a single point of failure.
If you have a separate connection for the replication of data between the two sites,
then that can be used to reduce single point of failure. Currently, Symantec only
ships heartbeat agent for symmetric arrays.
Prerequisites for ClusterService group
The ClusterService group must be configured with the Process (for the wide-area
connector), NIC, and IP resources. The service group may contain additional
resources for Cluster Management Console and notification, if these components
are configured. It is configured automatically when VCS is installed or upgraded.
Prerequisites for replication setup
VCS global clusters are used for disaster recovery, so you must set up real-time
data replication between clusters. You can use VCS agents for supported replication
solutions to manage the replication.
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Connecting clusters–Creating global clusters
Setting up a global cluster
Prerequisites for clusters running in secure mode
If you plan to configure secure communication among clusters in the global clusters,
then you must meet the following prerequisites:
■
You must configure the wide area connector processes in both clusters to run
in secure mode.
When you configure security using CPI, the installer creates an AT account for
the wide-area connector also.
■
Both clusters must run in secure mode.
■
You can configure security by using the installvcs -security command.
For more information, see the Veritas Cluster Server Installation Guide.
■
Both the clusters must share a trust relationship. You can set up a trust
relationship by using the installvcs -securitytrustcommand.
For more information, see the Veritas Cluster Server Installation Guide.
Setting up a global cluster
This topic describes how to plan, configure, and test a global cluster. It provides an
example of converting a single instance Oracle database configured for local high
availability in a VCS cluster to a highly available, disaster-protected infrastructure
using a second cluster. The solution uses Veritas Volume Replicator to replicate
data.
The following figure shows an example of a single-instance Oracle database that
is configured as a VCS service group (appgroup) on a two-node cluster.
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Connecting clusters–Creating global clusters
Setting up a global cluster
Figure 15-4
Example: A single-instance Oracle database is configured as a VCS
service group (appgroup) on a two-node cluster
Note: Before beginning the process, review the prerequisites and make sure your
configuration is ready for a global cluster application: See “ Prerequisites for global
clusters” on page 470.
Setting up a global cluster involves the following steps:
■
Prepare the application for the global environment
See “Preparing the application for the global environment” on page 474.
■
Configure the ClusterService group
See “Configuring the ClusterService group” on page 474.
■
Configure replication resources in VCS
See “Configuring replication resources in VCS” on page 475.
■
Link the application and replication service groups
See “Linking the application and replication service groups” on page 477.
■
Configure the second cluster
See “Configuring the second cluster” on page 478.
■
Linkclusters
See “Linking clusters” on page 478.
■
Configure the Steward process
See “Configuring the Steward process (optional)” on page 479.
■
Configure the global service group
See “Configuring the global service group” on page 483.
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Connecting clusters–Creating global clusters
Setting up a global cluster
Preparing the application for the global environment
This topic describes how to to set up a global cluster environment.
To prepare the application for the global cluster environment
1
Install the application (Oracle in this example) in the second cluster.
Make sure the installation is identical with the one in the first cluster.
2
Set up replication between the shared disk groups in both clusters.
If your configuration uses VVR, the process involves grouping the shared data
volumes in the first cluster into a Replicated Volume Group (RVG), and creating
the VVR Secondary on hosts in the new cluster, located in your remote site.
See Veritas Volume Replicator documentation.
Configuring the ClusterService group
You can configure the service group using the VCS Configuration wizard, Cluster
Manager (Java Console), or the command line.
For instructions on how to create the service group using the wizard:
See “Configuring the ClusterService group” on page 352.
To configure the ClusterService group
1
If the ClusterService group does not exist in the cluster create a new service
group called ClusterService.
2
Add resources of type IP, NIC, and Process to the service group.
3
Name the NIC resource csgnic and configure the MACAddress attribute for
the resource. The MACAddress is the physical address of the adapter on the
system. This attribute has a per-system value.
4
Name the IP resource webip and configure the following attributes for the
resource:
5
■
MACAddress—The physical address of the adapter on the system. This
attribute could have a per-system value.
■
Address—The virtual IP address for communicating between clusters. The
IP address must have a DNS entry.
■
SubNetMask—The subnet mask associated with the virtual IP address.
Name the Process resource wac and configure the following attributes for the
resource:
■
StartProgram—Complete path to the wide-area connector process.
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Connecting clusters–Creating global clusters
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■
If the clusters are running in secure mode, you can set this attribute to:
%VCS_HOME%\bin\wac.exe -secure. For example: C:\Program
Files\VERITAS\Cluster Server\bin\wac.exe -secure.
■
If the clusters are not running in secure mode, set this attribute to:
%VCS_HOME%\bin\wac.exe
For example: C:\Program Files\VERITAS\Cluster Server\bin\wac.exe.
■
StopProgram—Complete path to the program that stops the wac process.
Set this attribute to: %VCS_HOME%\bin\wacstop.exe For example:
C:\Program Files\VERITAS\Cluster Server\bin\wacstop.exe.
■
MonitorProgram—Complete path to the program that monitors the wac
process, typically C:\Program Files\VERITAS\Cluster
Server\bin\wacmonitor.exe.
6
Mark the wac resource as critical.
7
Set resource dependencies as per the following information:
■
Process resource (wac) depends on the IP resource (webip)
■
IP resource (webip) depends on the NIC resource (csgnic)
Enable the resources and bring the ClusterService group online.
Configuring replication resources in VCS
This topic describes how to set up replication using Veritas Volume Replicator
(VVR.)
VCS supports several replication solutions for global clustering. Contact your
Symantec sales representative for the solutions that VCS supports.
About the prerequisites for configuring replication resources
in VCS
■
Create Replicator Log Volumes for the primary and secondary sites.
■
Create the replicated data sets for VVR. See the VVR documentation for
instructions.
■
Verify that the disk group is imported on the node on which you want to create
the VVR RVG Service Group.
■
Verify VCS is running, by running the following command on the host on which
the you intend to run the VVR configuration Wizard.
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Connecting clusters–Creating global clusters
Setting up a global cluster
To create a VVR service group
1
From the active node of the cluster at the primary site, click Start > All
Programs > Symantec > Veritas Cluster Server > Configuration Tools >
Volume Replicator Agent Configuration Wizard to launch the configuration
wizard.
2
Read and verify the requirements on the Welcome panel, and click Next.
3
In the Wizard Options panel, click Create a new replication service group,
and then click Next.
4
Specify the service group name and system priority list:
■
Enter the service group name.
■
In the Available Cluster Systems box, click the nodes on which to configure
the service group, and click the right-arrow icon to move the nodes to the
service group’s system list. Make sure that the set of nodes selected for
the replication service group is the same or a superset of nodes selected
for the application’s Server service group. Ensure that the nodes are in the
same priority order.
■
To remove a node from the service group’s system list, click the node in
the Systems in Priority Orderbox, and click the left arrow icon.
■
To change the priority of a node in the system list, click the node in the
Systems in Priority Order box, then click the up and down arrow icons. The
node at the top of the list has the highest priority.
■
Click Next.
5
A message appears, indicating that the configuration will be changed from
Read Only to Read/Write. Click Yes to continue.
6
In the Disk Group and Replicated Volume Group Configuration panel:
■
Select Configure RVGPrimary resource for selected RVG.
■
Select the replicated volume group for which you want to configure the VVR
RVG resource.
■
Click Next.
7
In the IP Resource Options panel, select Create a new IP resource and click
Next.
8
Enter the network information:
■
Verify or enter the virtual IP address; use the IP address specified as the
primary IP address when you configured the RDS.
■
Verify the subnet mask.
476
Connecting clusters–Creating global clusters
Setting up a global cluster
■
Specify the adapters for each system in the configuration.
■
Click Next.
Note: At this step, the specified IP address does not yet need to exist.
9
If a message appears, indicating that the specified IP is not configured for
replication in this RVG, click OK to continue.
10 Review the summary of the service group configuration:
The Resourcesbox lists the configured resources. Click a resource to view its
attributes and their configured values in the Attributesbox.
■
If necessary, change the resource names; the wizard assigns unique names
to resources based on their respective name rules.
To edit a resource name, click the resource name and modify it in the right
pane. Press Enter after editing each attribute. To cancel editing a resource
name, press Esc.
■
Click Next to create the VVR service group.
11 When prompted, click Yes to create the service group.
Click Finish to bring the replication service group online.
Linking the application and replication service groups
Set an online local hard group dependency from appgroup to appgroup_rep to
ensure that the service groups fail over and switch together.
To link the service groups
1
In the Cluster Explorer configuration tree, click the cluster name.
2
In the view panel, click the Service Groups tab. This opens the service group
dependency graph.
3
Click Link.
4
Click the parent group, appgroup, and move the mouse toward the child group,
appgroup_rep.
5
Click the child group appgroup_rep.
6
In the Link Service Groups dialog box, click the online local relationship and
the hard dependency type and click OK.
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Connecting clusters–Creating global clusters
Setting up a global cluster
Configuring the second cluster
This topic describes how to configure a second cluster:
To configure a second cluster
1
Modify the ClusterService group in the second cluster for global cluster
configuration.
See “Configuring the ClusterService group” on page 474.
2
Create a configuration that is similar to the one in the first cluster.
You can do this by either using Cluster Manager (Java Console) to copy and
paste resources from the primary cluster, or by copying the configuration of
the appgroup and appgroup_rep groups from the main.cf file in the primary
cluster to the secondary cluster.
Run the VVR Configuration wizard to set up the VVR service group.
3
To assign remote administration privileges to users, configure users with the
same name and privileges on both clusters.
See “User privileges in global clusters” on page 73.
4
Make appropriate changes to the configuration. For example, you must modify
the SystemList attribute to reflect the systems in the secondary cluster.
Make sure that the name of the service group (appgroup) is identical in both
clusters.
VVR best practice is to use the same disk group and RVG name on both sites.
If the volume names are the same on both sides, the Mount resources will
mount the same block devices, and the same Oracle instance will start at the
secondary in case of a failover.
Linking clusters
After the VCS and VVR infrastructure has been set up at both sites, you must link
the two clusters. The Remote Cluster Configuration wizard provides an easy interface
to link clusters.
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Connecting clusters–Creating global clusters
Setting up a global cluster
To link clusters
1
Verify that the virtual IP address for the ClusterAddress attribute for each cluster
is set.
Use the same IP address as the one assigned to the IP resource in the
ClusterService group.
2
If you are adding a cluster to an existing global cluster environment, run the
wizard from a cluster in the global cluster environment. Otherwise, run the
wizard from any cluster. From Cluster Explorer, click Edit>Add/Delete Remote
Cluster.
See “Adding a remote cluster” on page 498.
To configure an additional heartbeat between the clusters (optional)
1
On Cluster Explorer’s Edit menu, click Configure Heartbeats.
2
In the Heartbeat configuration dialog box, enter the name of the heartbeat and
select the check box next to the name of the cluster.
3
Click the icon in the Configure column to open the Heartbeat Settings dialog
box.
4
Specify the value of the Arguments attribute and various timeout and interval
fields. Click + to add an argument value; click - to delete it.
If you specify IP addresses in the Arguments attribute, make sure the IP
addresses have DNS entries.
5
Click OK.
6
Click OK in the Heartbeat configuration dialog box.
Now, you can monitor the state of both clusters from the Java Console:
Configuring the Steward process (optional)
In case of a two-cluster GCO, you can configure a Steward to prevent potential
split-brain conditions, provided the proper network infrastructure exists.
See “About the Steward process: Split-brain in two-cluster global clusters”
on page 468.
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Connecting clusters–Creating global clusters
Setting up a global cluster
To configure the Steward process for clusters not running in secure mode
1
Identify a system that will host the Steward process.
Make sure both clusters can connect to the system through a ping command.
2
Copy the file steward from a node in the cluster to the Steward system. The
file resides at the following path:
%VCS_HOME%\bin
The variable %VCS_HOME% represents the VCS installation directory, typically
C:\Program Files\VERITAS\Cluster Server.
3
In both clusters, set the Stewards attribute to the IP address of the system
running the Steward process. For example:
cluster cluster1938 (
UserNames = { admin = gNOgNInKOjOOmWOiNL }
ClusterAddress = "10.182.147.19"
Administrators = { admin }
CredRenewFrequency = 0
CounterInterval = 5
Stewards = {"10.212.100.165"}
}
4
On the system designated to host the Steward, start the Steward process:
steward.exe -start
To configure the Steward process for clusters running in secure mode
1
Verify the prerequisites for securing Steward communication are met.
See “ Prerequisites for clusters running in secure mode” on page 472.
2
Identify a system that will host the Steward process.
Make sure both clusters can connect to the system through a ping command.
3
Copy the steward file from a node in the cluster to the Steward system. The
file resides at the following path:
%VCS_HOME%\bin\
The variable %VCS_HOME% represents the VCS installation directory, typically
C:\Program Files\Veritas\Cluster Server.
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Connecting clusters–Creating global clusters
Setting up a global cluster
4
Install the Symantec Product Authentication Services client on the system that
is designated to run the Steward process.
See the Quick Start Guide for Symantec Product Authentication Service for
instructions.
5
Create an account for the Steward in any authentication broker of the clusters
that are part of the global cluster. All cluster nodes serve as authentication
brokers when the cluster runs in secure mode.
vssat addprpl --pdrtype ab --domain
HA_SERVICES@<fully_qualified_name_of_cluster_node_on_which_t
his_command_is_being_run> --prplname Steward_GCO_systemname
--password password --prpltype service
When creating the account, make sure the following conditions are met:
■
The domain name must be of the form:
HA_SERVICES@fully_qualified_system_name
■
The account name must be of the form: Steward_GCO_systemname
■
The account type must be service and the domain type must be VX.
6
Note the password used to create the account.
7
Retrieve the broker hash for the account.
vssat showbrokerhash
8
Create a credential package (steward.cred) for this account. Note that the
credential package will be bound to a system.
vssat createpkg --prplname Steward_GCO_systemname --domain
vx:HA_SERVICES@<fully_qualified_name_of_cluster_node_on_whic
h_this_command_is_being_run> --broker systemname:2821 -password password --hash <brokerhash_obtained_in_above_step>
--out steward.cred --host_ctx
systemname_on_which_steward_will_run
9
Copy the file steward.cred to the system designated to run the Steward process.
Copy the file to the C:\temp directory.
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Connecting clusters–Creating global clusters
Setting up a global cluster
10 Execute the credential package on the system designated to run the Steward
process.
vssat execpkg --in <path_to_credential>\steward.cred --ob -host_ctx
The variable <path_to_credential> represents the directory to which you coped
the steward credentials.
11 On the Steward system, create a file called Steward.conf and populate it with
the following information:
broker=system_name
accountname=accountname
domain=HA_SERVICES@FQDN_of_system_that_issued_the_certificate
12 In both clusters, set the Stewards attribute to the IP address of the system that
runs the Steward process. For example:
cluster cluster1938 (
UserNames = { admin = gNOgNInKOjOOmWOiNL }
ClusterAddress = "10.182.147.19"
Administrators = { admin }
CredRenewFrequency = 0
CounterInterval = 5
Stewards = {"10.212.100.165"}
}
13 On the system designated to run the Steward, start the Steward process:
steward.exe -start -secure
Stopping the Steward process
When you start the Steward, the process does not release the command window.
Stop the Steward process, by typing control+C in the command window or open
another command window and run the command to stop the Steward process.
To stop the Steward process that is not configured in secure mode
◆
Open a new command window and run the following command:
steward.exe -stop
482
Connecting clusters–Creating global clusters
Setting up a global cluster
To stop the Steward process running in secure mode
◆
Open a new command window and run the following command:
steward.exe -stop -secure
Configuring the global service group
Configure the Oracle service group, appgroup, as a global group by running the
Global Group Configuration wizard.
To create the global service group
1
In the service group tree of Cluster Explorer, right-click the application service
group (appgroup)
2
Select Configure As Global from the menu.
3
Enter the details of the service group to modify (appgroup).
4
From the Available Clusters box, click the clusters on which the group can
come online. The local cluster is not listed as it is implicitly defined to be part
of the ClusterList. Click the right arrow to move the cluster name to the
ClusterList box.
5
Select the policy for cluster failover:
■
Manual prevents a group from automatically failing over to another cluster.
■
Auto enables a group to automatically fail over to another cluster if it is
unable to fail over within the cluster, or if the entire cluster faults.
■
Connected enables a group to automatically fail over to another cluster if
it is unable to fail over within the cluster.
6
Click Next.
7
Enter or review the connection details for each cluster. Click the Configure
icon to review the remote cluster information for each cluster.
8
Enter the IP address of the remote cluster, the IP address of a cluster system,
or the host name of a cluster system.
9
Enter the user name and the password for the remote cluster and click OK.
10 Click Next.
483
Connecting clusters–Creating global clusters
About cluster faults
11 Click Finish.
12 Save the configuration.
The appgroup service group is now a global group and can be failed over
between clusters.
For remote cluster operations, you must configure a VCS user with the same
name and privileges in each cluster.
See “User privileges in global clusters” on page 73.
About cluster faults
In the global cluster setup, consider a case where the primary cluster suffers a
failure. The Oracle service group cannot fail over in the local cluster and must fail
over globally, to a node in another cluster.
In this situation, VCS sends an alert indicating that the cluster is down.
An administrator can bring the group online in the remote cluster.
The RVGPrimary agent ensures that VVR volumes are made writable and the DNS
agent ensures that name services are resolved to the remote site. The application
can be started at the remote site.
About the type of failure
If a disaster disables all processing power in your primary data center, heartbeats
from the failover site to the primary data center fail. VCS sends an alert signalling
cluster failure. If you choose to take action on this failure, VCS prompts you to
declare the type of failure.
You can choose one of the following options to declare the failure:
■
Disaster, implying permanent loss of the primary data center
■
Outage, implying the primary may return to its current form in some time
■
Disconnect, implying a split-brain condition; both clusters are up, but the link
between them is broken
■
Replica, implying that data on the takeover target has been made consistent
from a backup source and that the RVGPrimary can initiate a takeover when
the service group is brought online. This option applies to VVR environments
only.
You can select the groups to be failed over to the local cluster, in which case VCS
brings the selected groups online on a node based on the group’s FailOverPolicy
attribute. It also marks the groups as being OFFLINE in the other cluster. If you do
484
Connecting clusters–Creating global clusters
About setting up a disaster recovery fire drill
not select any service groups to fail over, VCS takes no action except implicitly
marking the service groups as offline in the failed cluster.
Switching the service group back to the primary
You can switch the service group back to the primary after resolving the fault at the
primary site. Before switching the application to the primary site, you must
resynchronize any changed data from the active Secondary site since the failover.
This can be done manually through VVR or by running a VCS action from the
RVGPrimary resource.
To switch the service group when the primary site has failed and the secondary did
a takeover
1
In the Service Groups tab of the configuration tree, right-click the resource.
2
Click Actions.
3
Specify the details of the action:
■
From the Action list, choose fbsync.
■
Click the system on which to execute the action.
■
Click OK.
This begins a fast-failback of the replicated data set. You can monitor the value
of the ResourceInfo attribute for the RVG resource to determine when the
resynchronization has completed.
4
Once the resynchronization completes, switch the service group to the primary
cluster.
■
In the Service Groups tab of the Cluster Explorer configuration tree,
right-click the service group.
■
Click Switch To, and click Remote switch.
■
In the Switch global group dialog box, click the cluster to switch the group.
Click the specific system, or click Any System, and click OK.
About setting up a disaster recovery fire drill
The disaster recovery fire drill procedure tests the fault-readiness of a configuration
by mimicking a failover from the primary site to the secondary site. This procedure
is done without stopping the application at the primary site and disrupting user
access, interrupting the flow of replicated data, or causing the secondary site to
need resynchronization.
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Connecting clusters–Creating global clusters
About setting up a disaster recovery fire drill
The initial steps to create a fire drill service group on the secondary site that closely
follows the configuration of the original application service group and contains a
point-in-time copy of the production data in the Replicated Volume Group (RVG).
Bringing the fire drill service group online on the secondary site demonstrates the
ability of the application service group to fail over and come online at the secondary
site, should the need arise. Fire drill service groups do not interact with outside
clients or with other instances of resources, so they can safely come online even
when the application service group is online.
You must conduct a fire drill only at the secondary site; do not bring the fire drill
service group online on the node hosting the original application.
Before you perform a fire drill in a disaster recovery setup that uses VVR, perform
the following steps:
■
Set the value of the ReuseMntPt attribute to 1 for all Mount resources.
■
Configure the fire drill service group.
See “About creating and configuring the fire drill service group manually”
on page 486.
■
After the fire drill service group is taken offline, reset the value of the ReuseMntPt
attribute to 0 for all Mount resources.
Set an offline local dependency between the fire drill service group and the
application service group to make sure a fire drill does not block an application
failover in case a disaster strikes the primary site.
See “About creating and configuring the fire drill service group manually” on page 486.
VCS also supports HA fire drills to verify a resource can fail over to another node
in the cluster.
For detailed instructions on how to set up a fire drill in using the Solutions
Configurations Center, see the following documents:
■
Veritas Storage Foundation and High Availability Solutions HA and Disaster
Recovery Solutions Guide for Microsoft SQL
■
Veritas Storage Foundation and High Availability Solutions HA and Disaster
Recovery Solutions Guide for Microsoft Exchange
■
Veritas Storage Foundation and High Availability Solutions, Solutions Guide
About creating and configuring the fire drill service group manually
You can create the fire drill service group using the command line or Cluster
Manager (Java Console.) The fire drill service group uses the duplicated copy of
the application data.
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Connecting clusters–Creating global clusters
About setting up a disaster recovery fire drill
Creating and configuring the fire drill service group involves the following tasks:
■
See “Creating the fire drill service group” on page 487.
■
See “Linking the fire drill and replication service groups” on page 488.
■
See “Adding resources to the fire drill service group” on page 488.
■
See “Configuring the fire drill service group” on page 488.
■
See “Enabling the FireDrill attribute” on page 489.
Creating the fire drill service group
This section describes how to use the Cluster Manager (Java Console) to create
the fire drill service group and change the failover attribute to false so that the fire
drill service group does not failover to another node during a test.
To create the fire drill service group
1
Open the Veritas Cluster Manager (Java Console). (Start > All Programs >
Symantec > Veritas Cluster Manager - Java Console)
2
Log on to the cluster and click OK.
3
Click the Service Group tab in the left pane and click the Resources tab in
the right pane.
4
Right-click the cluster in the left pane and click Add Service Group.
5
In the Add Service Group dialog box, provide information about the new
service group.
■
In Service Group name, enter a name for the fire drill service group
■
Select systems from the Available Systems box and click the arrows to add
them to the Systems for Service Group box.
■
Click OK.
To disable the AutoFailOver attribute
1
Click the Service Group tab in the left pane and select the fire drill service
group.
2
Click the Properties tab in the right pane.
3
Click the Show all attributes button.
4
Double-click the AutoFailOver attribute.
5
In the Edit Attribute dialog box, clear the AutoFailOver check box.
6
Click OK to close the Edit Attribute dialog box.
7
Click the Save and Close Configuration icon in the tool bar.
487
Connecting clusters–Creating global clusters
About setting up a disaster recovery fire drill
Linking the fire drill and replication service groups
Create an online local firm dependency link between the fire drill service group and
the replication service group.
To link the service groups
1
In Cluster Explorer, click the System tab in the left pane and click theService
Groups tab in the right pane.
2
Click Link.
3
Click the fire drill service group, drag the link and click the replication service
group.
4
Define the dependency. Choose the online local and firm options and click
OK.
Adding resources to the fire drill service group
Add resources to the new fire drill service group to recreate key aspects of the
application service group.
To add resources to the service group
1
In Cluster Explorer, click the Service Group tab in the left pane, click the
application service group and click the Resources tab in the right pane.
2
Right-click the resource at the top of the tree, select Copy and click Self and
Child Nodes.
3
In the left pane, click the fire drill service group.
4
Right-click the right pane, and click Paste.
5
In the Name Clashes dialog box, specify a way for the resource names to be
modified, for example, insert an FD_ prefix. Click Apply.
6
Click OK.
Configuring the fire drill service group
After copying resources to the fire drill service group, edit the resources so they
will work properly with the duplicated data. The attributes must be modified to reflect
the configuration at the remote site. Bringing the service group online without
modifying resource attributes is likely to result in a cluster fault and interruption in
service.
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Connecting clusters–Creating global clusters
About setting up a disaster recovery fire drill
To configure the service group
1
In Cluster Explorer, click the Service Group tab in the left pane, click the fire
drill service group in the left pane and click the Resources tab in the right
pane.
2
Right-click the RVGPrimary resource and click Delete.
3
Right-click the resource to be edited and click View>Properties View. If a
resource to be edited does not appear in the pane, click Show All Attributes.
4
Edit attributes to reflect the configuration at the remote site. For example,
change the MountV resources so that they point to the volumes used in the
fire drill service group. Similarly, reconfigure the DNS and IP resources.
Enabling the FireDrill attribute
You must edit certain resource types so they are FireDrill-enabled. Making a
resource type FireDrill-enabled changes the way that VCS checks for concurrency
violations. Typically, when FireDrill is not enabled, resources can not come online
on more than one node in a cluster at a time. This behavior prevents multiple nodes
from using a single resource or from answering client requests. Fire drill service
groups do not interact with outside clients or with other instances of resources, so
they can safely come online even when the application service group is online.
Typically, you would enable the FireDrill attribute for the resource type used the
configure the agent. For example, in a service group monitoring SQL Server 2008,
enable the FireDrill attribute for the SQLServer2008 and the SQLFilestream resource
types.
To enable the FireDrill attribute
1
In Cluster Explorer, click the Types tab in the left pane, right-click the type to
be edited, and click View > Properties View.
2
Click Show All Attributes.
3
Double click FireDrill.
4
In the Edit Attribute dialog box, enable FireDrill as required, and click OK.
Repeat the process of enabling the FireDrill attribute for all required resource
types.
489
Connecting clusters–Creating global clusters
Multi-tiered application support using the RemoteGroup agent in a global environment
Multi-tiered application support using the
RemoteGroup agent in a global environment
Figure 15-5 represents a two-site, two-tier environment. The application cluster,
which is globally clustered between L.A. and Denver, has cluster dependencies up
and down the tiers. Cluster 1 (C1), depends on the remote service group for cluster
3 (C3). At the same time, cluster 2 (C2) also depends on the remote service group
for cluster 4 (C4).
Figure 15-5
A VCS two-tiered globally clustered application and database
Stockton
Denver
Global local service group (LSG)
with a RemoteGroup resource (RGR)
Application
tier
Cluster 1 (C1)
Global cluster
Cluster 2 (C2)
Global remote service
group (RSG)
Database
tier
Cluster 3 (C3)
Global cluster
Cluster 4 (C4)
Just as a two-tier, two-site environment is possible, you can also tie a three-tier
environment together.
Figure 15-6 represents a two-site, three-tier environment. The application cluster,
which is globally clustered between L.A. and Denver, has cluster dependencies up
and down the tiers. Cluster 1 (C1), depends on the RemoteGroup resource on the
DB tier for cluster 3 (C3), and then on the remote service group for cluster 5 (C5).
The stack for C2, C4, and C6 functions the same.
490
Connecting clusters–Creating global clusters
Test scenario for a multi-tiered environment
Figure 15-6
A three-tiered globally clustered application, database, and storage
Stockton
Denver
Global local service group (LSG)
with a RemoteGroup resource (RGR)
Web
application
tier
Cluster 1 (C1)
Global cluster
Cluster 2 (C2)
Global middle service group (GMG)
with a RemoteGroup resource (RGR)
Application
tier
Cluster 3 (C3)
Global cluster
Cluster 4 (C4)
Global remote service
group (RSG)
Database
tier
Cluster 5 (C5)
Global cluster
Cluster 6 (C6)
Test scenario for a multi-tiered environment
In the following scenario, eight systems reside in four clusters. Each tier contains
a global cluster. The global local service group in the top tier depends on the global
remote service group in the bottom tier.
The following main.cf files show this multi-tiered environment. The FileOnOff
resource is used to test the dependencies between layers. Note that some attributes
have been edited for clarity, and that these clusters are not running in secure mode.
Figure 15-7 shows the scenario for testing.
491
Connecting clusters–Creating global clusters
Test scenario for a multi-tiered environment
Figure 15-7
A VCS two-tiered globally clustered scenario
Site A
sysA
Site B
sysB
C1= 10.182.10.145
sysW
sysC
Global cluster
sysX
C3= 10.182.6.152
C2= 10.182.10.146
sysY
Global cluster
sysD
sysZ
C4= 10.182.6.154
About the main.cf file for cluster 1
The contents of the main.cf file for cluster 1 (C1) in the top tier, containing the sysA
and sysB nodes.
include "types.cf"
cluster C1 (
ClusterAddress = "10.182.10.145"
)
remotecluster C2 (
ClusterAddress = "10.182.10.146"
)
heartbeat Icmp (
ClusterList = { C2 }
AYATimeout = 30
Arguments @C2 = { "10.182.10.146" }
492
Connecting clusters–Creating global clusters
Test scenario for a multi-tiered environment
493
)
system sysA (
)
system sysB (
)
group LSG (
SystemList = { sysA = 0, sysB = 1 }
ClusterList = { C2 = 0, C1 = 1 }
AutoStartList = { sysA, sysB }
ClusterFailOverPolicy = Auto
)
FileOnOff filec1 (
PathName = "/tmp/c1"
)
RemoteGroup RGR (
IpAddress = "10.182.6.152"
// The above IPAddress is the highly available address of C3—
// the same address that the wac uses
Username = root
Password = xxxyyy
GroupName = RSG
VCSSysName = ANY
ControlMode = OnOff
)
About the main.cf file for cluster 2
The contents of the main.cf file for cluster 2 (C2) in the top tier, containing the sysC
and sysD nodes.
include "types.cf"
cluster C2 (
ClusterAddress = "10.182.10.146"
)
remotecluster C1 (
ClusterAddress = "10.182.10.145"
Connecting clusters–Creating global clusters
Test scenario for a multi-tiered environment
494
)
heartbeat Icmp (
ClusterList = { C1 }
AYATimeout = 30
Arguments @C1 = { "10.182.10.145" }
)
system sysC (
)
system sysD (
)
group LSG (
SystemList = { sysC = 0, sysD = 1 }
ClusterList = { C2 = 0, C1 = 1 }
Authority = 1
AutoStartList = { sysC, sysD }
ClusterFailOverPolicy = Auto
)
FileOnOff filec2 (
PathName = filec2
)
RemoteGroup RGR (
IpAddress = "10.182.6.154"
// The above IPAddress is the highly available address of C4—
// the same address that the wac uses
Username = root
Password = vvvyyy
GroupName = RSG
VCSSysName = ANY
ControlMode = OnOff
)
About the main.cf file for cluster 3
The contents of the main.cf file for cluster 3 (C3) in the bottom tier, containing the
sysW and sysX nodes.
Connecting clusters–Creating global clusters
Test scenario for a multi-tiered environment
include "types.cf"
cluster C3 (
ClusterAddress = "10.182.6.152"
)
remotecluster C4 (
ClusterAddress = "10.182.6.154"
)
heartbeat Icmp (
ClusterList = { C4 }
AYATimeout = 30
Arguments @C4 = { "10.182.6.154" }
)
system sysW (
)
system sysX (
)
group RSG (
SystemList = { sysW = 0, sysX = 1 }
ClusterList = { C3 = 1, C4 = 0 }
AutoStartList = { sysW, sysX }
ClusterFailOverPolicy = Auto
)
FileOnOff filec3 (
PathName = "/tmp/filec3"
)
About the main.cf file for cluster 4
The contents of the main.cf file for cluster 4 (C4) in the bottom tier, containing the
sysY and sysZ nodes.
include "types.cf"
cluster C4 (
ClusterAddress = "10.182.6.154"
)
495
Connecting clusters–Creating global clusters
Test scenario for a multi-tiered environment
remotecluster C3 (
ClusterAddress = "10.182.6.152"
)
heartbeat Icmp (
ClusterList = { C3 }
AYATimeout = 30
Arguments @C3 = { "10.182.6.152" }
)
system sysY (
)
system sysZ (
)
group RSG (
SystemList = { sysY = 0, sysZ = 1 }
ClusterList = { C3 = 1, C4 = 0 }
Authority = 1
AutoStartList = { sysY, sysZ }
ClusterFailOverPolicy = Auto
)
FileOnOff filec4 (
PathName = "/tmp/filec4"
)
496
Chapter
16
Administering global
clusters from Cluster
Manager (Java console)
This chapter includes the following topics:
■
About global clusters
■
Adding a remote cluster
■
Deleting a remote cluster
■
Administering global service groups
■
Administering global heartbeats
About global clusters
The process of creating a global cluster environment involves creating a common
service group for specified clusters, making sure all the service groups are capable
of being brought online in the specified clusters, connecting the standalone clusters,
and converting the service group that is common to all the clusters to a global
service group. Use the console to add and delete remote clusters, create global
service groups, and manage cluster heartbeats.
Creating a global cluster environment requires the following conditions:
■
All service groups are properly configured and able to come online.
■
The service group that will serve as the global group has the same unique name
across all applicable clusters.
■
The clusters must use the same version of VCS.
Administering global clusters from Cluster Manager (Java console)
Adding a remote cluster
■
The clusters must use the same operating system.
■
The clusters are standalone and do not already belong to a global cluster
environment.
Through the Java Console, you can simulate the process of generating and clearing
global cluster faults in an OFFLINE state. Use VCS Simulator to complete these
operations.
See “About VCS Simulator” on page 359.
For remote cluster operations, you must configure a VCS user with the same name
and privileges in each cluster.
See “User privileges in global clusters” on page 73.
Adding a remote cluster
Cluster Explorer provides a wizard to create global clusters by linking standalone
clusters. Command Center only enables you to perform remote cluster operations
on the local cluster.
■
If you are creating a global cluster environment for the first time with two
standalone clusters, run the wizard from either of the clusters.
■
If you are adding a standalone cluster to an existing global cluster environment,
run the wizard from a cluster already in the global cluster environment.
The following information is required for the Remote Cluster Configuration Wizard
in Cluster Explorer:
■
The active host name or IP address of each cluster in the global configuration
and of the cluster being added to the configuration.
■
The user name and password of the administrator for each cluster in the
configuration.
■
The user name and password of the administrator for the cluster being added
to the configuration.
Note: Symantec does not support adding a cluster that is already part of a global
cluster environment. To merge the clusters of one global cluster environment (for
example, cluster A and cluster B) with the clusters of another global environment
(for example, cluster C and cluster D), separate cluster C and cluster D into
standalone clusters and add them one by one to the environment containing cluster
A and cluster B.
498
Administering global clusters from Cluster Manager (Java console)
Adding a remote cluster
To add a remote cluster to a global cluster environment in Cluster Explorer
1
Do one of the following to add a remote cluster to a global cluster environment
in Cluster Explorer:
From Cluster Explorer, click Add/Delete Remote Cluster on the Edit menu.
or
From the Cluster Explorer configuration tree, right-click the cluster name, and
click Add/Delete Remote Clusters.
2
Review the required information for the Remote Cluster Configuration Wizard
and click Next.
3
In the Wizard Options dialog box, click Add Cluster and then, click Next.
4
Enter the details of the new cluster:
If the cluster is not running in secure mode, do the following:
■
Enter the host name of a cluster system, an IP address of a cluster system,
or the IP address of the cluster that will join the global environment.
■
Verify the port number.
■
Enter the user name and the password.
■
Click Next.
If the cluster is running in secure mode, do the following:
499
Administering global clusters from Cluster Manager (Java console)
Adding a remote cluster
■
Enter the host name of a cluster system, an IP address of a cluster system,
or the IP address of the cluster that will join the global environment.
■
Verify the port number.
■
Choose to connect to the remote cluster with the credentials used for the
current cluster connection or enter new credentials, including the user name,
password, and the domain.
If you have connected to the remote cluster using the wizard earlier, you
can use the credentials from the previous connection.
Click Next.
5
Enter the details of the existing remote clusters; this information on administrator
rights enables the wizard to connect to all the clusters and make changes to
the configuration.
6
Click the Configure icon.
If the cluster is not running in secure mode, do the following:
500
Administering global clusters from Cluster Manager (Java console)
Adding a remote cluster
■
Enter the host name of a cluster system, an IP address of a cluster system,
or the IP address of the cluster that will join the global environment.
■
Verify the port number.
■
Enter the user name.
■
Enter the password.
■
Click OK.
■
Repeat these steps for each cluster in the global environment.
If the cluster is running in secure mode, do the following:
■
Enter the host name of a cluster system, an IP address of a cluster system,
or the IP address of the cluster that will join the global environment.
■
Verify the port number.
■
Choose to connect to the remote cluster with the credentials used for the
current cluster connection or enter new credentials, including the user name,
password, and the domain.
501
Administering global clusters from Cluster Manager (Java console)
Deleting a remote cluster
■
Click OK.
7
Click Next.
8
Click Finish. After running the wizard, the configurations on all the relevant
clusters are opened and changed; the wizard does not close the configurations.
To add a remote cluster to a global cluster environment in Command Center
1
Click Commands > Configuration > Cluster Objects > Add Remote Cluster.
2
Enter the name of the cluster.
3
Enter the IP address of the cluster.
4
Click Apply.
Note: Command Center enables you to perform operations on the local cluster;
this does not affect the overall global cluster configuration.
Deleting a remote cluster
The Remote Cluster Configuration Wizard enables you to delete a remote cluster.
This operation involves the following tasks:
■
Taking the ApplicationProcess resource configured to monitor the wac resource
offline on the cluster that will be removed from the global environment. For
example, to delete cluster C2 from a global environment containing C1 and C2,
log on to C2 and take the wac resource offline.
■
Removing the name of the specified cluster (C2) from the cluster lists of the
other global groups using the Global Group Configuration Wizard. Note that the
Remote Cluster Configuration Wizard in Cluster Explorer updates the cluster
lists for heartbeats. Log on to the local cluster (C1) to complete this task before
using the Global Group Configuration Wizard.
■
Deleting the cluster (C2) from the local cluster (C1) using the Remote Cluster
Configuration Wizard.
Note: You cannot delete a remote cluster if the cluster is part of a cluster list for
global service groups or global heartbeats, or if the cluster is in the RUNNING,
BUILD, INQUIRY, EXITING, or TRANSITIONING states.
502
Administering global clusters from Cluster Manager (Java console)
Deleting a remote cluster
To take the wac resource offline
1
From Cluster Monitor, log on to the cluster that will be deleted from the global
cluster environment.
2
Do one of the following:
In the Service Groups tab of the Cluster Explorer configuration tree, right-click
the wac resource under the Process type in the ClusterService group.
or
Click the ClusterService group in the configuration tree, click the Resources
tab, and right-click the resource in the view panel.
3
Click Offline, and click the appropriate system from the menu.
To remove a cluster from a cluster list for a global group
1
From Cluster Explorer, click Configure Global Groups on the Edit menu.
2
Click Next.
3
Enter the details of the service group to modify, as follows:
4
■
Click the name of the service group.
■
For global to local cluster conversion, click the left arrow to move the cluster
name from the cluster list back to the Available Clusters box.
■
Click Next.
Enter or review the connection details for each cluster. Click the Configure
icon to review the remote cluster information for each cluster.
If the cluster is not running in secure mode, do the following:
■
Enter the IP address of the remote cluster, the IP address of a cluster
system, or the host name of a cluster system.
■
Verify the port number.
■
Enter the user name.
■
Enter the password.
■
Click OK.
If the cluster is running in secure mode, do the following:
■
Enter the IP address of the remote cluster, the IP address of a cluster
system, or the host name of a cluster system.
■
Verify the port number.
503
Administering global clusters from Cluster Manager (Java console)
Deleting a remote cluster
■
Choose to connect to the remote cluster using the connected cluster’s
credentials or enter new credentials, including the user name, password,
and the domain.
■
Click OK.
5
Click Next.
6
Click Finish.
To delete a remote cluster from the local cluster
1
Do one of the following:
From Cluster Explorer, click Add/Delete Remote Cluster on the Edit menu.
or
From the Cluster Explorer configuration tree, right-click the cluster name, and
click Add/Delete Remote Clusters.
2
Review the required information for the Remote Cluster Configuration Wizard
and click Next.
3
In the Wizard Options dialog box, click Delete Cluster and click Next:
4
In the Delete Cluster dialog box, click the name of the remote cluster to delete,
and then click Next:
5
Review the connection details for each cluster. Click the Configure icon to
review the remote cluster information for each cluster.
If the cluster is not running in secure mode, do the following:
■
Enter the IP address of the remote cluster, the IP address of a cluster
system, or the host name of a cluster system.
■
Verify the port number.
■
Enter the user name.
504
Administering global clusters from Cluster Manager (Java console)
Administering global service groups
■
Enter the password.
■
Click OK.
If the cluster is running in secure mode, do the following:
6
■
Enter the IP address of the remote cluster, the IP address of a cluster
system, or the host name of a cluster system.
■
Verify the port number.
■
Choose to connect to the remote cluster with the credentials used for the
current cluster connection or enter new credentials, including the user name,
password, and the domain.
■
If you have connected to the remote cluster using the wizard earlier, you
can use the credentials from the previous connection.
■
Click OK.
Click Finish.
Administering global service groups
After connecting clusters in a global cluster environment, use the Global Group
Configuration Wizard to convert a local service group that is common to the global
clusters to a global group. This wizard also enables you to convert global groups
into local groups.
Administering global groups requires the following conditions:
■
A group that will serve as the global group must have the same name across
all applicable clusters.
■
You must know the user name and password for the administrator for each
cluster in the configuration.
Use Cluster Explorer to bring a global group online and take a global group offline
on a remote cluster.
Converting local and global groups
Perform the following procedure to convert local and global groups.
505
Administering global clusters from Cluster Manager (Java console)
Administering global service groups
To convert local and global groups
1
Do one of the following:
From Cluster Explorer, click Configure Global Groups... on the Edit menu.
or
From the Cluster Explorer configuration tree, right-click the service group, click
Configure As Global... or Make Local... and proceed to 3.
2
Review the information required for the Global Group Configuration Wizard
and click Next.
3
Enter the details of the service group to modify:
■
Click the name of the service group that will be converted from a local group
to a global group, or vice versa.
■
From the Available Clusters box, click the clusters on which the group
can come online. Click the right arrow to move the cluster name to the
Clusters for Service Group box; for global to local cluster conversion,
click the left arrow to move the cluster name back to the Available Clusters
box. A priority number (starting with 0) indicates the cluster in which the
group will attempt to come online. If necessary, double-click the entry in
the Priority column to enter a new value.
■
Select one of the following policies for cluster failover:
■
■
Manual prevents a group from automatically failing over to another
cluster.
■
Auto enables a group to automatically fail over to another cluster if it is
unable to fail over within the cluster, or if the entire cluster faults.
■
Connected enables a group to automatically fail over to another cluster
if it is unable to fail over within the cluster.
Click Next.
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Administering global clusters from Cluster Manager (Java console)
Administering global service groups
4
Enter or review the connection details for each cluster:
Click the Configure icon to review the remote cluster information for each
cluster.
If the cluster is not running in secure mode, do the following:
■
Enter the IP address of the remote cluster, the IP address of a cluster
system, or the host name of a cluster system.
■
Verify the port number.
■
Enter the user name and password.
■
Click OK.
Repeat these steps for each cluster in the global environment.
If the cluster is running in secure mode, do the following:
■
Enter the IP address of the remote cluster, the IP address of a cluster
system, or the host name of a cluster system.
■
Verify the port number.
■
Choose to connect to the remote cluster with the credentials used for the
current cluster connection, or enter new credentials, including the user
name, password, and the domain.
If you have connected to the remote cluster using the wizard earlier, you
can use the credentials from the previous connection.
■
Click OK.
Repeat these steps for each cluster in the global environment.
5
In the Remote cluster information dialog box, click Next.
6
Click Finish.
507
Administering global clusters from Cluster Manager (Java console)
Administering global service groups
Bringing a service group online in a remote cluster
This topic describes how to bring a service group online in a remote cluster.
To bring a service group online in a remote cluster
1
Do the following:
In the Service Groups tab of the Cluster Explorer configuration tree of a local
cluster, right-click the service group.
or
Click a local cluster in the configuration tree, click the Service Groups tab,
and right-click the service group icon in the view panel.
2
Click Online, and click Remote online...
3
In the Online global group dialog box, do the following:
4
■
Click the remote cluster to bring the group online.
■
Click the specific system, or click Any System, to bring the group online.
■
Click OK.
In the Question dialog box, click Yes.
Taking a service group offline in a remote cluster
This topic describes how to take a service group offline in a remote cluster.
To take a service group offline in a remote cluster
1
Do the following:
In the Service Groups tab of the Cluster Explorer configuration tree of a local
cluster, right-click the service group.
or
Click a local cluster in the configuration tree, click the Service Groups tab,
and right-click the service group icon in the view panel.
2
Click Offline, and click Remote offline...
3
In the Offline global group dialog box, do the following:
4
■
Click the remote cluster to take the group offline.
■
Click the specific system, or click All Systems, to take the group offline.
■
Click OK.
In the Question dialog box, click Yes.
508
Administering global clusters from Cluster Manager (Java console)
Administering global heartbeats
Switching a service group to a remote cluster
This topic describes how to switch a service group to a remote cluster.
To switch a service group to a remote cluster
1
Do the following:
In the Service Groups tab of the Cluster Explorer configuration tree of a local
cluster, right-click the service group.
or
Click a local cluster in the configuration tree, click the Service Groups tab,
and right-click the service group icon in the view panel.
2
Click Switch To, and click Remote switch...
3
In the Switch global group dialog box:
4
■
Click the cluster to switch the group.
■
Click the specific system, or click Any System, to switch the group.
In the Question dialog box, click Yes.
Administering global heartbeats
Use Cluster Explorer to add, modify, and delete heartbeats in a global cluster
environment. Icmp heartbeats send Icmp packets simultaneously to all IP addresses;
IcmpS heartbeats send individual Icmp packets to IP addresses in serial order.
Global clustering requires a minimum of one heartbeat between clusters; the Icmp
heartbeat is added when the cluster is added to the environment. You can add
additional heartbeats as a precautionary measure.
Adding a global heartbeat
This topic describes how to add a global heartbeat.
To add a cluster heartbeat from Cluster Explorer
1
Click Configure Heartbeats on the Edit menu.
2
In the Heartbeat Configuration dialog box, do the following:
509
Administering global clusters from Cluster Manager (Java console)
Administering global heartbeats
■
Enter the name of the heartbeat.
■
Select the check box next to the name of the cluster to add it to the cluster
list for the heartbeat.
■
Click the icon in the Configure column to open the Heartbeat Settings
dialog box.
■
Specify the value of the Arguments attribute and various timeout and interval
fields. Click + to add an argument value; click - to delete it.
■
Click OK.
■
Click OK on the Heartbeat configuration dialog box.
To add a cluster heartbeat from Command Center
1
Click Commands>Configuration>Cluster Objects>Add Heartbeat.
2
Enter the name of the heartbeat.
3
Click Apply.
Modifying a global heartbeat
This topic describes how to modify a global heartbeat.
To modify a global heartbeat
1
From Cluster Explorer, click Configure Heartbeats on the Edit menu.
2
In the Heartbeat Configuration dialog box:
510
Administering global clusters from Cluster Manager (Java console)
Administering global heartbeats
■
Click Existing Heartbeat.
■
Click the name of the existing heartbeat from the menu.
■
Select or clear the check box next to the name of a cluster to add or remove
it from the cluster list for the heartbeat.
■
If necessary, click the icon in the Configure column to open the Heartbeat
Settings dialog box. Otherwise, proceed to the last step.
■
Change the values of the Arguments attribute and various timeout and
interval fields. Click + to add an argument value; click - to delete it.
■
Click OK.
■
Click OK on the Heartbeat Configuration dialog box.
Deleting a global heartbeat
This topic describes how to delete a global heartbeat. You cannot delete the last
heartbeat between global clusters.
To delete a cluster heartbeat from Command Center
1
Click Commands>Configuration>Cluster Objects>Delete Heartbeat.
2
Click the heartbeat to delete.
3
Click Apply.
511
Chapter
17
Administering global
clusters from the command
line
This chapter includes the following topics:
■
About administering global clusters from the command line
■
About global querying in a global cluster setup
■
Administering global service groups in a global cluster setup
■
Administering resources in a global cluster setup
■
Administering clusters in global cluster setup
■
Administering heartbeats in a global cluster setup
About administering global clusters from the
command line
For remote cluster operations, you must configure a VCS user with the same name
and privileges in each cluster.
See “User privileges in global clusters” on page 73.
Review the following procedures to administer global clusters from the
command-line.
See “User privileges in global clusters” on page 73.
See “User privileges in global clusters” on page 73.
Administering global clusters from the command line
About global querying in a global cluster setup
See “User privileges in global clusters” on page 73.
See “User privileges in global clusters” on page 73.
See “Administering heartbeats in a global cluster setup” on page 525.
About global querying in a global cluster setup
VCS enables you to query global cluster objects, including service groups, resources,
systems, resource types, agents, and clusters. You may enter query commands
from any system in the cluster. Commands to display information on the global
cluster configuration or system states can be executed by all users; you do not
need root privileges. Only global service groups may be queried.
See “Querying global cluster service groups” on page 513.
See “Querying resources across clusters” on page 514.
See “Querying systems” on page 516.
See “Querying clusters” on page 516.
See “Querying status” on page 518.
See “Querying heartbeats” on page 518.
Querying global cluster service groups
This topic describes how to perform a query on global cluster service groups:
To display service group attribute values across clusters
◆
Use the following command to display service group attribute values across
clusters:
hagrp -value service_group attribute [system]
[-clus cluster | -localclus]
The option -clus displays the attribute value on the cluster designated by the
variable cluster; the option -localclus specifies the local cluster.
If the attribute has local scope, you must specify the system name, except
when querying the attribute on the system from which you run the command.
513
Administering global clusters from the command line
About global querying in a global cluster setup
To display the state of a service group across clusters
◆
Use the following command to display the state of a service group across
clusters:
hagrp -state [service_groups -sys systems]
[-clus cluster | -localclus]
The option -clus displays the state of all service groups on a cluster designated
by the variable cluster; the option -localclus specifies the local cluster.
To display service group information across clusters
◆
Use the following command to display service group information across clusters:
hagrp -display [service_groups] [-attribute attributes]
[-sys systems] [-clus cluster | -localclus]
The option -clus applies to global groups only. If the group is local, the cluster
name must be the local cluster name, otherwise no information is displayed.
To display service groups in a cluster
◆
Use the following command to display service groups in a cluster:
hagrp -list [conditionals] [-clus cluster | -localclus]
The option -clus lists all service groups on the cluster designated by the
variable cluster; the option -localclus specifies the local cluster.
To display usage for the service group command
◆
Use the following command to display usage for the service group command:
hagrp [-help [-modify|-link|-list]]
Querying resources across clusters
This topic describes how to perform queries on resources:
514
Administering global clusters from the command line
About global querying in a global cluster setup
To display resource attribute values across clusters
◆
Use the following command to display resource attribute values across clusters:
hares -value resource attribute [system]
[-clus cluster | -localclus]
The option -clus displays the attribute value on the cluster designated by the
variable cluster; the option -localclus specifies the local cluster.
If the attribute has local scope, you must specify the system name, except
when querying the attribute on the system from which you run the command.
To display the state of a resource across clusters
◆
Use the following command to display the state of a resource across clusters:
hares -state [resource -sys system]
[-clus cluster | -localclus]
The option -clus displays the state of all resources on the specified cluster;
the option -localclus specifies the local cluster. Specifying a system displays
resource state on a particular system.
To display resource information across clusters
◆
Use the following command to display resource information across clusters:
hares -display [resources] [-attribute attributes]
[-group service_groups] [-type types] [-sys systems]
[-clus cluster | -localclus]
The option -clus lists all service groups on the cluster designated by the
variable cluster; the option -localclus specifies the local cluster.
To display a list of resources across clusters
◆
Use the following command to display a list of resources across clusters:
hares -list [conditionals] [-clus cluster | -localclus]
The option -clus lists all resources that meet the specified conditions in global
service groups on a cluster as designated by the variable cluster.
To display usage for the resource command
◆
Use the following command to display usage for the resource command:
hares -help [-modify | -list]
515
Administering global clusters from the command line
About global querying in a global cluster setup
516
Querying systems
This topic describes how to perform queries on systems:
To display system attribute values across clusters
◆
Use the following command to display system attribute values across clusters:
hasys -value system attribute [-clus cluster | -localclus]
The option -clus displays the values of a system attribute in the cluster as
designated by the variable cluster; the option -localclus specifies the local
cluster.
To display the state of a system across clusters
◆
Use the following command to display the state of a system across clusters:
hasys -state [system] [-clus cluster | -localclus]
Displays the current state of the specified system. The option -clus displays
the state in a cluster designated by the variable cluster; the option -localclus
specifies the local cluster. If you do not specify a system, the command displays
the states of all systems.
For information about each system across clusters
◆
Use the following command to display information about each system across
clusters:
hasys -display [systems] [-attribute attributes] [-clus cluster |
-localclus]
The option -clus displays the attribute values on systems (if specified) in a
cluster designated by the variable cluster; the option -localclus specifies the
local cluster.
For a list of systems across clusters
◆
Use the following command to display a list of systems across clusters:
hasys -list [conditionals] [-clus cluster | -localclus]
Displays a list of systems whose values match the given conditional statements.
The option -clus displays the systems in a cluster designated by the variable
cluster; the option -localclus specifies the local cluster.
Querying clusters
This topic describes how to perform queries on clusters:
Administering global clusters from the command line
About global querying in a global cluster setup
For the value of a specific cluster attribute on a specific cluster
◆
Use the following command to obtain the value of a specific cluster attribute
on a specific cluster:
haclus -value attribute [cluster] [-localclus]
The attribute must be specified in this command. If you do not specify the
cluster name, the command displays the attribute value on the local cluster.
To display the state of a local or remote cluster
◆
Use the following command to display the state of a local or remote cluster:
haclus -state [cluster] [-localclus]
The variable cluster represents the cluster. If a cluster is not specified, the state
of the local cluster and the state of all remote cluster objects as seen by the
local cluster are displayed.
For information on the state of a local or remote cluster
◆
Use the following command for information on the state of a local or remote
cluster:
haclus -display [cluster] [-localclus]
If a cluster is not specified, information on the local cluster is displayed.
For a list of local and remote clusters
◆
Use the following command for a list of local and remote clusters:
haclus -list [conditionals]
Lists the clusters that meet the specified conditions, beginning with the local
cluster.
To display usage for the cluster command
◆
Use the following command to display usage for the cluster command:
haclus [-help [-modify]]
517
Administering global clusters from the command line
About global querying in a global cluster setup
To display the status of a faulted cluster
◆
Use the following command to display the status of a faulted cluster:
haclus -status cluster
Displays the status on the specified faulted cluster. If no cluster is specified,
the command displays the status on all faulted clusters. It lists the service
groups that were not in the OFFLINE or the FAULTED state before the fault
occurred. It also suggests corrective action for the listed clusters and service
groups.
Querying status
This topic describes how to perform queries on status of remote and local clusters:
For the status of local and remote clusters
◆
Use the following command to obtain the status of local and remote clusters:
hastatus
Querying heartbeats
The hahb command is used to manage WAN heartbeats that emanate from the
local cluster. Administrators can monitor the "health of the remote cluster via
heartbeat commands and mechanisms such as Internet, satellites, or storage
replication technologies. Heartbeat commands are applicable only on the cluster
from which they are issued.
Note: You must have Cluster Administrator privileges to add, delete, and modify
heartbeats.
The following commands are issued from the command line.
For a list of heartbeats configured on the local cluster
◆
Use the following command for a list of heartbeats configured on the local
cluster:
hahb -list [conditionals]
The variable conditionals represents the conditions that must be met for the
heartbeat to be listed.
518
Administering global clusters from the command line
About global querying in a global cluster setup
To display information on heartbeats configured in the local cluster
◆
Use the following command to display information on heartbeats configured in
the local cluster:
hahb -display [heartbeat ...]
If heartbeat is not specified, information regarding all heartbeats configured on
the local cluster is displayed.
To display the state of the heartbeats in remote clusters
◆
Use the following command to display the state of heartbeats in remote clusters:
hahb -state [heartbeat] [-clus cluster]
For example, to get the state of heartbeat Icmp from the local cluster to the
remote cluster phoenix:
hahb -state Icmp -clus phoenix
To display an attribute value of a configured heartbeat
◆
Use the following command to display an attribute value of a configured
heartbeat:
hahb -value heartbeat attribute [-clus cluster]
The -value option provides the value of a single attribute for a specific
heartbeat. The cluster name must be specified for cluster-specific attribute
values, but not for global.
For example, to display the value of the ClusterList attribute for heartbeat Icmp:
hahb -value Icmp ClusterList
Note that ClusterList is a global attribute.
To display usage for the command hahb
◆
Use the following command to display usage for the command hahb:
hahb [-help [-modify]]
If the -modify option is specified, the usage for the hahb -modify option is
displayed.
519
Administering global clusters from the command line
Administering global service groups in a global cluster setup
Administering global service groups in a global cluster
setup
Operations for the VCS global clusters option are enabled or restricted depending
on the permissions with which you log on. The privileges associated with each user
role are enforced for cross-cluster, service group operations.
This topic includes commands to administer global service groups.
See the hagrp (1M) manual page for more information.
To administer global service groups in a global cluster setup
◆
Depending on the administrative task you want to perform on global service
groups, run the hagrp command as follows:
To bring a service hagrp -online -force
group online
across clusters for
the first time
To bring a service
group online
across clusters
hagrp -online service_group -sys system [-clus
cluster | -localclus]
To bring a service
group online on
any node
hagrp -online [-force] service_group -any [-clus
cluster | -localclus]
To display the
resources for a
service group
The option -clus brings the service group online on the system
designated in the cluster. If a system is not specified, the service
group is brought online on any node within the cluster. The option
-localclus brings the service group online in the local cluster.
The option -any specifies that HAD brings a failover group online
on the optimal system, based on the requirements of service group
workload management and existing group dependencies. If
bringing a parallel group online, HAD brings the group online on
each system designated in the SystemList attribute.
hagrp -resources service_group [-clus
cluster_name | -localclus]
The option -clus displays information for the cluster designated
by the variable cluster_name; the option -localclus specifies
the local cluster.
520
Administering global clusters from the command line
Administering global service groups in a global cluster setup
To take a service
group offline
across clusters
hagrp -offline [-force] [-ifprobed] service_group
-sys system [-clus cluster | -localclus]
To take a service
group offline
anywhere
hagrp -offline [-ifprobed] service_group -any
[-clus cluster | -localclus]
The option -clus takes offline the service group on the system
designated in the cluster.
The option -any specifies that HAD takes a failover group offline
on the system on which it is online. For a parallel group, HAD
takes the group offline on each system on which the group is
online. HAD adheres to the existing group dependencies when
taking groups offline.
To switch a service hagrp -switch service_group -to system [-clus
group across
cluster | -localclus [-nopre]]
clusters
The option -clus identifies the cluster to which the service group
will be switched. The service group is brought online on the system
specified by the -to system argument. If a system is not specified,
the service group may be switched to any node within the specified
cluster.
The option -nopre indicates that the VCS engine must switch
the service group regardless of the value of the PreSwitch service
group attribute.
To switch a service hagrp -switch service_group -any [-clus cluster
group anywhere
| -localclus]
The -any option specifies that the VCS engine switches a service
group to the best possible system on which it is currently not online,
based on the value of the group's FailOverPolicy attribute. The
VCS engine switches a global service group from a system to
another system in the local cluster or a remote cluster.
If you do not specify the -clus option, the VCS engine by default
assumes -localclus option and selects an available system
within the local cluster.
The option -clus identifies the remote cluster to which the service
group will be switched. The VCS engine then selects the target
system on which to switch the service group.
To switch a parallel hagrp -switch
global service
VCS brings the parallel service group online on all possible nodes
group across
in the remote cluster.
clusters
521
Administering global clusters from the command line
Administering resources in a global cluster setup
Administering resources in a global cluster setup
This topic describes how to administer resources.
See the hares (1M) manual page for more information.
To administer resources in a global cluster setup
◆
Depending on the administrative task you want to perform for resources, run
the hares command as follows:
To take action on a hares -action resource token [-actionargs arg1
resource across
...] [-sys system] [-clus cluster | -localclus]
clusters
The option -clus implies resources on the cluster. If the
designated system is not part of the local cluster, an error is
displayed. If the -sys option is not used, it implies resources on
the local node.
To invoke the Info
function across
clusters
hares -refreshinfo resource [-sys system] [-clus
cluster | -localclus]
To display usage
for the resource
command
hares [-help [-modify |-list]]
Causes the Info function to update the value of the ResourceInfo
resource level attribute for the specified resource if the resource
is online. If no system or remote cluster is specified, the Info
function runs on local system(s) where the resource is online.
Administering clusters in global cluster setup
The topic includes commands that are used to administer clusters in a global cluster
setup.
See the haclus (1M) manual page for more information.
To administer clusters in global cluster setup
◆
Depending on the administrative task you want to perform on the clusters, run
the haclus command as follows:
The variable cluster in the following commands represents the cluster.
To add a remote
cluster object
haclus -add cluster ip
This command does not apply to the local cluster.
522
Administering global clusters from the command line
Administering clusters in global cluster setup
To delete a remote
cluster object
haclus -delete cluster
To modify an attribute
of a local or remote
cluster object
haclus -modify attribute value [-clus
cluster]...
To declare the state of haclus -declare
a cluster after a
disconnet/outage/disaster/replica -clus
disaster
cluster [-failover]
To manage cluster
alerts
See “Managing cluster alerts in a global cluster setup”
on page 523.
To change the cluster
name
See “Changing the cluster name in a global cluster setup”
on page 524.
Managing cluster alerts in a global cluster setup
This topic includes commands to manage cluster alerts.
See the haalert (1M) manual page for more information.
To manage cluster alerts
◆
Run the haalert command to manage cluster alerts.
haalert -testfd
Generates a simulated "cluster fault" alert that is sent
to the VCS engine and GUI.
haalert -display
For each alert, the command displays the following
information:
haalert -list
■
alert ID
■
time when alert occurred
■
cluster on which alert occurred
■
object name for which alert occurred
■
(cluster name, group name, and so on).
■
informative message about alert
For each alert, the command displays the following
information:
■
time when alert occurred
■
alert ID
523
Administering global clusters from the command line
Administering clusters in global cluster setup
haalert -delete
alert_id -notes
"description"
Deletes a specific alert. You must enter a text message
within quotes describing the reason for deleting the
alert. The comment is written to the engine log as well
as sent to any connected GUI clients.
haalert -help
Displays the usage text
Changing the cluster name in a global cluster setup
This topic describes how to change the ClusterName attribute in a global cluster
configuration. The instructions describe how to rename VCSPriCluster to
VCSPriCluster2 in a two-cluster configuration, comprising clusters VCSPriCluster
and VCSSecCluster configured with the global group AppGroup.
Before changing the cluster name, make sure the cluster is not part of any
ClusterList, in the wide-area Heartbeat agent and in global service groups.
To change the name of a cluster
1
Run the following commands from cluster VCSPriCluster:
hagrp -offline ClusterService -any
hagrp -modify AppGroup ClusterList -delete VCSPriCluster
haclus -modify ClusterName VCSPriCluster2
hagrp -modify AppGroup ClusterList -add VCSPriCluster2 0
2
Run the following commands from cluster VCSSecCluster:
hagrp -offline ClusterService -any
hagrp -modify appgrp ClusterList -delete VCSPriCluster
hahb -modify Icmp ClusterList -delete VCSPriCluster
haclus -delete VCSPriCluster
haclus -add VCSPriCluster2 your_ip_address
hahb -modify Icmp ClusterList -add VCSPriCluster2
hahb -modify Icmp Arguments your_ip_address -clus VCSPriCluster2
hagrp -modify AppGroup ClusterList -add VCSPriCluster2 0
hagrp -online ClusterService -any
3
Run the following command from the cluster renamed to VCSPriCluster2:
hagrp -online ClusterService -any
524
Administering global clusters from the command line
Administering heartbeats in a global cluster setup
Administering heartbeats in a global cluster setup
This topic includes commands that are used to administer heartbeats.
See the hahb (1M) manual page for more information.
To administer heartbeats in a global cluster setup
◆
Depending on the administrative task you want to perform for heartbeats, run
the hahb command as follows:
To create a
heartbeat
hahb -add heartbeat
For example, type the following command to add a new IcmpS
heartbeat. This represents a heartbeat sent from the local cluster
and immediately forks off the specified agent process on the local
cluster.
hahb -add IcmpS
To modify a
heartbeat
hahb -modify heartbeat attribute value ... [-clus
cluster]
If the attribute is local, that is, it has a separate value for each
remote cluster in the ClusterList attribute, the option -clus
cluster must be specified. Use -delete -keys to clear the
value of any list attributes.
For example, type the following command to modify the ClusterList
attribute and specify targets "phoenix and "houston for the newly
created heartbeat:
hahb -modify Icmp ClusterList phoenix houston
To modify the Arguments attribute for target phoenix:
hahb -modify Icmp Arguments phoenix.example.com
-clus phoenix
To delete a
heartbeat
hahb -delete heartbeat
To change the
scope of an
attribute to
cluster-specific
hahb -local heartbeat attribute
For example, type the following command to change the scope of
the attribute AYAInterval from global to cluster-specific:
hahb -local Icmp AYAInterval
525
Administering global clusters from the command line
Administering heartbeats in a global cluster setup
To change the
scope of an
attribute to global
hahb -global heartbeat attribute value ... | key
... | key value ...
For example, type the following command to change the scope of
the attribute AYAInterval from cluster-specific to cluster-generic:
hahb -global Icmp AYAInterval 60
526
Chapter
18
Setting up replicated data
clusters
This chapter includes the following topics:
■
About replicated data clusters
■
How VCS replicated data clusters work
■
About setting up a replicated data cluster configuration
About replicated data clusters
The Replicated Data Cluster (RDC) configuration provides both local high availability
and disaster recovery functionality in a single VCS cluster.
You can set up RDC in a VCS environment using Veritas Volume Replicator (VVR).
A Replicated Data Cluster (RDC) uses data replication to assure data access to
nodes. An RDC exists within a single VCS cluster. In an RDC configuration, if an
application or a system fails, the application is failed over to another system within
the current primary site. If the entire primary site fails, the application is migrated
to a system in the remote secondary site (which then becomes the new primary).
For VVR replication to occur, the disk groups containing the Replicated Volume
Group (RVG) must be imported at the primary and secondary sites. The replication
service group must be online at both sites simultaneously, and must be configured
as a hybrid VCS service group.
The application service group is configured as a failover service group. The
application service group must be configured with an online local hard dependency
on the replication service group.
Setting up replicated data clusters
How VCS replicated data clusters work
Note: VVR supports multiple replication secondary targets for any given primary.
However, RDC for VCS supports only one replication secondary for a primary.
An RDC configuration is appropriate in situations where dual dedicated LLT links
are available between the primary site and the disaster recovery secondary site
but lacks shared storage or SAN interconnect between the primary and secondary
data centers. In an RDC, data replication technology is employed to provide node
access to data in a remote site.
Note: You must use dual dedicated LLT links between the replicated nodes.
How VCS replicated data clusters work
To understand how a replicated data cluster configuration works, let us take the
example of an application configured in a VCS replicated data cluster. The
configuration has two system zones:
■
Primary zone (zone 0) comprising nodes located at the primary site and attached
to the primary storage
■
Secondary zone (zone 1) comprising nodes located at the secondary site and
attached to the secondary storage
The application is installed and configured on all nodes in the cluster. Application
data is located on shared disks within each RDC zone and is replicated across
RDC zones to ensure data concurrency. The application service group is online on
a system in the current primary zone and is configured to fail over in the cluster.
Figure 18-1 depicts an application configured on a VCS replicated data cluster.
528
Setting up replicated data clusters
About setting up a replicated data cluster configuration
A VCS replicated data cluster configuration
Figure 18-1
Client
Client
Client
Public
Network
Zone 0
Client
Clients
Redirected
Zone 1
Private Network
Service
Group
Service
Group
Application
Failover
Replicated
Data
Separate
Storage
Separate
Storage
In the event of a system or application failure, VCS attempts to fail over the
application service group to another system within the same RDC zone. However,
in the event that VCS fails to find a failover target node within the primary RDC
zone, VCS switches the service group to a node in the current secondary RDC
zone (zone 1). VCS also redirects clients once the application is online on the new
location.
About setting up a replicated data cluster
configuration
Depending on your application, refer to one of the following solutions guides for
detailed configuration information:
■
For Microsoft Exchange 2007, see the Veritas Storage Foundation and High
Availability Solutions HA and Disaster Recovery Solutions Guide for Microsoft
Exchange 2007.
■
For Microsoft Exchange 2010, see the Veritas Storage Foundation and High
Availability Solutions HA and Disaster Recovery Solutions Guide for Microsoft
Exchange 2010.
■
For Microsoft SQL Server 2005 or 2008, see the Veritas Storage Foundation
and High Availability Solutions HA and Disaster Recovery Solutions Guide for
Microsoft SQL Server.
529
Setting up replicated data clusters
About setting up a replicated data cluster configuration
■
For Microsoft SQL Server 2008 or 2008 R2, see the Veritas Storage Foundation
and High Availability Solutions HA and Disaster Recovery Solutions Guide for
Microsoft SQL Server 2008.
■
For any other application, see the Veritas Storage Foundation and High
Availability Solutions HA and Disaster Recovery Solutions Guide.
530
Section
Troubleshooting and
performance
■
Chapter 19. VCS performance considerations
■
Chapter 20. Troubleshooting and recovery for VCS
5
Chapter
19
VCS performance
considerations
This chapter includes the following topics:
■
How cluster components affect performance
■
How cluster operations affect performance
■
Monitoring CPU usage
■
VCS agent statistics
■
About VCS performance with non-HA products
■
About VCS performance with SFW
How cluster components affect performance
VCS and its agents run on the same systems as the applications. Therefore, VCS
attempts to minimize its impact on overall system performance. The main
components of clustering that have an impact on performance include the kernel;
specifically, GAB and LLT, the VCS engine (HAD), and the VCS agents. For details
on attributes or commands mentioned in the following sections, see the chapter on
administering VCS from the command line and the appendix on VCS attributes.
See “How kernel components (GAB and LLT) affect performance” on page 533.
See “ How the VCS engine (HAD) affects performance” on page 534.
See “ How agents affect performance” on page 534.
See “How the VCS graphical user interfaces affect performance” on page 536.
VCS performance considerations
How cluster components affect performance
How kernel components (GAB and LLT) affect performance
Typically, overhead of VCS kernel components is minimal. Kernel components
provide heartbeat and atomic information exchange among cluster systems. By
default, each system in the cluster sends two small heartbeat packets per second
to other systems in the cluster.
Heartbeat packets are sent over all network links configured in the
%VCS_HOME%\comms\llt\llttab.txt configuration file.
System-to-system communication is load-balanced across all private network links.
If a link fails, VCS continues to use all remaining links. Typically, network links are
private and do not increase traffic on the public network or LAN. You can configure
a public network (LAN) link as low-priority, which by default generates a small
(approximately 64-byte) broadcast packet per second from each system, and which
will carry data only when all private network links have failed.
If the network adapters cannot ping each other, the cluster nodes
may not get GAB membership
While configuring LLT over UDP, if the network adapters selected for the LLT
communication cannot ping each other and you proceed with the cluster
configuration, VCW configures the LLT service on the selected network adapters
but the cluster nodes may not receive GAB membership and as a result the Veritas
High Availability Engine, HAD, may fail to start.
You can confirm the GAB membership by running the following command:
gabconfig -a
If no port membership information is returned it indicates that GAB is not operating.
This issue can be addressed in either of the following methods:
To address this issue using method 1
1
Reboot the cluster nodes that do not have GAB membership.
2
Verify the GAB operation in the cluster.
Type the following on the command prompt:
gabconfig -a
If GAB membership information is displayed for all cluster nodes, GAB is working
correctly. However, if the appropriate GAB membership information is not returned
for one or more nodes, GAB is not operating correctly. In that case, proceed to the
next method.
533
VCS performance considerations
How cluster components affect performance
To address this issue using method 2
1
Stop the LLT service in the cluster.
Type the following on the command prompt:
:net stop llt
2
Delete the cluster using VCW.
3
Ensure that the network adapters can ping each other and then re-create the
cluster using VCW.
How the VCS engine (HAD) affects performance
The VCS engine, HAD, runs as a daemon process. By default it runs as a
high-priority process, which ensures it sends heartbeats to kernel components and
responds quickly to failures. HAD runs logging activities in a separate thread to
reduce the performance impact on the engine due to logging.
VCS runs in a loop waiting for messages from agents, ha commands, the graphical
user interfaces, and the other systems. Under normal conditions, the number of
messages processed by HAD is few. They mainly include heartbeat messages from
agents and update messages from the global counter. VCS may exchange additional
messages when an event occurs, but typically overhead is nominal even during
events. Note that this depends on the type of event; for example, a resource fault
may involve taking the group offline on one system and bringing it online on another
system. A system fault invokes failing over all online service groups on the faulted
system.
To continuously monitor VCS status, use the VCS graphical user interfaces or the
command hastatus. Both methods maintain connection to VCS and register for
events, and are more efficient compared to running commands like hastatus
-summary or hasys in a loop.
The number of clients connected to VCS can affect performance if several events
occur simultaneously. For example, if five GUI processes are connected to VCS,
VCS sends state updates to all five. Maintaining fewer client connections to VCS
reduces this overhead.
How agents affect performance
The VCS agent processes have the most impact on system performance. Each
agent process has two components: the agent framework and the agent functions.
The agent framework provides common functionality, such as communication with
the HAD, multithreading for multiple resources, scheduling threads, and invoking
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VCS performance considerations
How cluster components affect performance
functions. Agent functions implement agent-specific functionality. Review the
performance guidelines to follow when configuring agents.
See “Monitoring resource type and agent configuration” on page 535.
Monitoring resource type and agent configuration
By default, VCS monitors each resource every 60 seconds. You can change this
by modifying the MonitorInterval attribute for the resource type. You may consider
reducing monitor frequency for non-critical or resources with expensive monitor
operations. Note that reducing monitor frequency also means that VCS may take
longer to detect a resource fault.
By default, VCS also monitors offline resources. This ensures that if someone brings
the resource online outside of VCS control, VCS detects it and flags a concurrency
violation for failover groups. To reduce the monitoring frequency of offline resources,
modify the OfflineMonitorInterval attribute for the resource type.
The VCS agent framework uses multithreading to allow multiple resource operations
to run in parallel for the same type of resources. For example, a single Mount agent
handles all mount resources. The number of agent threads for most resource types
is 10 by default. To change the default, modify the NumThreads attribute for the
resource type. The maximum value of the NumThreads attribute is 30.
Continuing with this example, the Mount agent schedules the monitor function for
all mount resources, based on the MonitorInterval or OfflineMonitorInterval attributes.
If the number of mount resources is more than NumThreads, the monitor operation
for some mount resources may be required to wait to execute the monitor function
until the thread becomes free.
Additional considerations for modifying the NumThreads attribute include:
■
If you have only one or two resources of a given type, you can set NumThreads
to a lower value.
■
If you have many resources of a given type, evaluate the time it takes for the
monitor function to execute and the available CPU power for monitoring. For
example, if you have 50 mount points, you may want to increase NumThreads
to get the ideal performance for the Mount agent without affecting overall system
performance.
You can also adjust how often VCS monitors various functions by modifying their
associated attributes. The attributes MonitorTimeout, OnlineTimeOut, and
OfflineTimeout indicate the maximum time (in seconds) within which the monitor,
online, and offline functions must complete or else be terminated. The default for
the MonitorTimeout attribute is 60 seconds. The defaults for the OnlineTimeout and
OfflineTimeout attributes is 300 seconds. For best results, Symantec recommends
measuring the time it takes to bring a resource online, take it offline, and monitor
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VCS performance considerations
How cluster operations affect performance
before modifying the defaults. Issue an online or offline command to measure the
time it takes for each action. To measure how long it takes to monitor a resource,
fault the resource and issue a probe, or bring the resource online outside of VCS
control and issue a probe.
Agents typically run with normal priority. When you develop agents, consider the
following:
■
If you write a custom agent, write the monitor function using C or C++. If you
write a script-based monitor, VCS must invoke a new process each time with
the monitor. This can be costly if you have many resources of that type.
■
If monitoring the resources is proving costly, you can divide it into cursory, or
shallow monitoring, and the more extensive deep (or in-depth) monitoring.
Whether to use shallow or deep monitoring depends on your configuration
requirements.
See About resource monitoring on page ?.
As an additional consideration for agents, properly configure the attribute SystemList
for your service group. For example, if you know that a service group can go online
on SystemA and SystemB only, do not include other systems in the SystemList.
This saves additional agent processes and monitoring overhead.
How the VCS graphical user interfaces affect performance
The VCS graphical user interface, Cluster Manager (Java Console) maintains a
persistent connection to HAD, from which it receives regular updates regarding
cluster status. For best results, run the GUI on a system outside the cluster to avoid
impact on node performance.
How cluster operations affect performance
Review the following topics that describe how the following operations on systems,
resources, and service groups in the cluster affect performance:
A cluster system boots
See “ VCS performance consideration when booting a cluster
system” on page 537.
A resource comes online
See “ VCS performance consideration when a resource
comes online” on page 538.
A resource goes offline
See “ VCS performance consideration when a resource goes
offline” on page 538.
A service group comes online See “VCS performance consideration when a service group
comes online” on page 538.
536
VCS performance considerations
How cluster operations affect performance
A service group goes offline
See “VCS performance consideration when a service group
goes offline” on page 539.
A resource fails
See “ VCS performance consideration when a resource fails”
on page 539.
A system fails
See “ VCS performance consideration when a system fails”
on page 540.
A network link fails
See “ VCS performance consideration when a network link
fails” on page 541.
A system panics
See “ VCS performance consideration when a system panics”
on page 541.
A service group switches over See “ VCS performance consideration when a service group
switches over” on page 543.
A service group fails over
See “ VCS performance consideration when a service group
fails over” on page 544.
VCS performance consideration when booting a cluster system
When a cluster system boots, the kernel drivers and VCS process start in a particular
order. If it is the first system in the cluster, VCS reads the cluster configuration file
main.cf and builds an in-memory configuration database. This is the LOCAL_BUILD
state. After building the configuration database, the system transitions into the
RUNNING mode. If another system joins the cluster while the first system is in the
LOCAL_BUILD state, it must wait until the first system transitions into RUNNING
mode. The time it takes to build the configuration depends on the number of service
groups in the configuration and their dependencies, and the number of resources
per group and resource dependencies. VCS creates an object for each system,
service group, type, and resource. Typically, the number of systems, service groups
and types are few, so the number of resources and resource dependencies
determine how long it takes to build the configuration database and get VCS into
RUNNING mode. If a system joins a cluster in which at least one system is in
RUNNING mode, it builds the configuration from the lowest-numbered system in
that mode.
Note: Bringing service groups online as part of AutoStart occurs after VCS transitions
to RUNNING mode.
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VCS performance consideration when a resource comes online
The online function of an agent brings the resource online. This function may return
before the resource is fully online. The subsequent monitor determines if the
resource is online, then reports that information to VCS. The time it takes to bring
a resource online equals the time for the resource to go online, plus the time for
the subsequent monitor to execute and report to VCS.
Most resources are online when the online function finishes. The agent schedules
the monitor immediately after the function finishes, so the first monitor detects the
resource as online. However, for some resources, such as a database server,
recovery can take longer. In this case, the time it takes to bring a resource online
depends on the amount of data to recover. It may take multiple monitor intervals
before a database server is reported online. When this occurs, it is important to
have the correct values configured for the OnlineTimeout and OnlineWaitLimit
attributes of the database server resource type.
VCS performance consideration when a resource goes offline
Similar to the online function, the offline function takes the resource offline and may
return before the resource is actually offline. Subsequent monitoring confirms
whether the resource is offline. The time it takes to offline a resource equals the
time it takes for the resource to go offline, plus the duration of subsequent monitoring
and reporting to VCS that the resource is offline. Most resources are typically offline
when the offline function finishes. The agent schedules the monitor immediately
after the offline function finishes, so the first monitor detects the resource as offline.
VCS performance consideration when a service group comes online
The time it takes to bring a service group online depends on the number of resources
in the service group, the service group dependency structure, and the time to bring
the group’s resources online. For example, if service group G1 has three resources,
R1, R2, and R3 (where R1 depends on R2 and R2 depends on R3), VCS first
onlines R3. When R3 is online, VCS onlines R2. When R2 is online, VCS onlines
R1. The time it takes to online G1 equals the time it takes to bring all resources
online. However, if R1 depends on both R2 and R3, but there was no dependency
between them, the online operation of R2 and R3 is started in parallel. When both
are online, R1 is brought online. The time it takes to online the group is Max (the
time to online R2 and R3), plus the time to online R1. Typically, broader service
group trees allow more parallel operations and can be brought online faster. More
complex service group trees do not allow much parallelism and serializes the group
online operation.
The time it takes to bring a service group online or take it offline also depends on
the type of service group, such as fileshare, printshare, enterprise agent, etc.
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For a fileshare service group, there are four factors that determine how long it takes
to bring a fileshare online:
■
ShareSubDirectories
If set to 1, each child subdirectory is shared. the fileshare group’s online entry
point shares child folders in addition to parent folders.
■
Number of subdirectories
The greater the number of subdirectories being shared, the longer it takes to
bring online, monitor, and take offline a fileshare service group.
■
Number of permissions
For each share, the online entry point applies the share permissions as
configured.
■
AutoShare and AutoControl
By default, if ShareSubDirectories is set, the fileshare service group monitors
new directories and shares them. AutoShare occurs in the monitor entry points.
For a printshare service group, the number of printers configured in the service
group determines the time required for the service group to come online. The greater
the number of printers, the more time required to bring the group online, monitor it,
and take it offline.
VCS performance consideration when a service group goes offline
Taking service groups offline works from the top down, as opposed to the online
operation, which works from the bottom up. The time it takes to offline a service
group depends on the number of resources in the service group and the time to
offline the group’s resources. For example, if service group G1 has three resources,
R1, R2, and R3 where R1 depends on R2 and R2 depends on R3, VCS first offlines
R1. When R1 is offline, VCS offlines R2. When R2 is offline, VCS offlines R3. The
time it takes to offline G1 equals the time it takes for all resources to go offline.
VCS performance consideration when a resource fails
The time it takes to detect a resource fault or failure depends on the MonitorInterval
attribute for the resource type. When a resource faults, the next monitor detects it.
The agent may not declare the resource as faulted if the ToleranceLimit attribute
is set to non-zero. If the monitor function reports offline more often than the number
set in ToleranceLimit, the resource is declared faulted. However, if the resource
remains online for the interval designated in the ConfInterval attribute, previous
reports of offline are not counted against ToleranceLimit.
When the agent determines that the resource is faulted, it calls the clean function
(if implemented) to verify that the resource is completely offline. The monitor following
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clean verifies the offline. The agent then tries to restart the resource according to
the number set in the RestartLimit attribute (if the value of the attribute is non-zero)
before it gives up and informs HAD that the resource is faulted. However, if the
resource remains online for the interval designated in ConfInterval, earlier attempts
to restart are not counted against RestartLimit.
In most cases, ToleranceLimit is 0. The time it takes to detect a resource failure is
the time it takes the agent monitor to detect failure, plus the time to clean up the
resource if the clean function is implemented. Therefore, the time it takes to detect
failure depends on the MonitorInterval, the efficiency of the monitor and clean (if
implemented) functions, and the ToleranceLimit (if set).
VCS performance consideration when a system fails
When a system crashes or is powered off, it stops sending heartbeats to other
systems in the cluster. By default, other systems in the cluster wait 21 seconds
before declaring it dead. The time of 21 seconds derives from 16 seconds default
timeout value for LLT peer inactive timeout, plus 5 seconds default value for GAB
stable timeout.
The default peer inactive timeout is 16 seconds, and can be modified in the
%VCS_HOME%\comms\llt\llttab.txt file.
For example, to specify 12 seconds:
set-timer peerinact:1200
Note: After modifying the peer inactive timeout, you must unconfigure, then restart
LLT before the change is implemented. To unconfigure LLT, type lltconfig -u.
To restart LLT, type lltconfig -c.
GAB stable timeout can be changed by specifying:
gabconfig -t timeout_value_milliseconds
Though this can be done, we do not recommend changing the values of the LLT
peer inactive timeout and GAB stable timeout.
If a system boots, it becomes unavailable until the reboot is complete. The reboot
process kills all processes, including HAD. When the VCS process is killed, other
systems in the cluster mark all service groups that can go online on the rebooted
system as autodisabled. The AutoDisabled flag is cleared when the system goes
offline. As long as the system goes offline within the interval specified in the
ShutdownTimeout value, VCS treats this as a system reboot. You can modify the
default value of the ShutdownTimeout attribute.
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VCS performance considerations
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See System attributes on page 646.
VCS performance consideration when a network link fails
If a system loses a network link to the cluster, other systems stop receiving
heartbeats over the links from that system. LLT detects this and waits for 16 seconds
before declaring the system lost a link.
See “ VCS performance consideration when a system fails” on page 540.
You can modify the LLT peer inactive timeout value in the
%VCS_HOME%\comms\llt\llttab.txt file.
For example, to specify 12 seconds:
set-timer peerinact:1200
Note: After modifying the peer inactive timeout, you must unconfigure, then restart
LLT before the change is implemented. To unconfigure LLT, type lltconfig -u.
To restart LLT, type lltconfig -c.
VCS performance consideration when a system panics
There are several instances in which GAB will intentionally panic a system. For
example, GAB panics a system if it detects an internal protocol error or discovers
an LLT node-ID conflict. Other instances are as follows:
■
Client process failure
See “About GAB client process failure” on page 541.
■
Registration monitoring
See “About registration monitoring” on page 542.
■
Network failure
See “About network failure” on page 543.
■
Quick reopen
See “About quick reopen” on page 543.
About GAB client process failure
If a GAB client process such as HAD fails to heartbeat to GAB, the process is killed.
If the process hangs in the kernel and cannot be killed, GAB halts the system. If
the -k option is used in the gabconfig command, GAB tries to kill the client process
until successful, which may have an impact on the entire cluster. If the -b option is
used in gabconfig, GAB does not try to kill the client process. Instead, it panics
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VCS performance considerations
How cluster operations affect performance
the system when the client process fails to heartbeat. This option cannot be turned
off once set.
HAD heartbeats with GAB at regular intervals. The heartbeat timeout is specified
by HAD when it registers with GAB; the default is 15 seconds. If HAD gets stuck
within the kernel and cannot heartbeat with GAB within the specified timeout, GAB
tries to kill HAD by sending a SIGABRT signal. If it does not succeed, GAB sends
a SIGKILL and closes the port. By default, GAB tries to kill HAD five times before
closing the port. The number of times GAB tries to kill HAD is a kernel tunable
parameter, gab_kill_ntries, and is configurable. The minimum value for this tunable
is 3 and the maximum is 10.
This is an indication to other nodes that HAD on this node has been killed. Should
HAD recover from its stuck state, it first processes pending signals. Here it will
receive the SIGKILL first and get killed.
After sending a SIGKILL, GAB waits for a specific amount of time for HAD to get
killed. If HAD survives beyond this time limit, GAB panics the system. This time
limit is a kernel tunable parameter, gab_isolate_time and is configurable. The
minimum value for this timer is 16 seconds and maximum is 4 minutes.
About registration monitoring
The registration monitoring feature lets you configure GAB behavior when HAD is
killed and does not reconnect after a specified time interval.
This scenario may occur in the following situations:
■
The system is very busy and the hashadow process cannot restart HAD.
■
The HAD and hashadow processes were killed by user intervention.
■
The hashadow process restarted HAD, but HAD could not register.
■
A hardware failure causes termination of the HAD and hashadow processes.
■
Any other situation where the HAD and hashadow processes are not run.
When this occurs, the registration monitoring timer starts. GAB takes action if HAD
does not register within the time defined by the VCS_GAB_RMTIMEOUT parameter,
which is defined in the vcsenv file. The default value for VCS_GAB_RMTIMEOUT
is 200 seconds.
When HAD cannot register after the specified time period, GAB logs a message
every 15 seconds saying it will panic the system.
You can control GAB behavior in this situation by setting the VCS_GAB_RMACTION
parameter in the vcsenv file.
■
To configure GAB to panic the system in this situation, set:
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VCS performance considerations
How cluster operations affect performance
VCS_GAB_RMACTION=panic
In this configuration, killing the HAD and hashadow processes results in a panic
unless you start HAD within the registration monitoring timeout interval.
■
To configure GAB to log a message in this situation, set:
VCS_GAB_RMACTION=SYSLOG
The default value of this parameter is SYSLOG, which configures GAB to log a
message when HAD does not reconnect after the specified time interval.
In this scenario, you can choose to restart HAD (using hastart) or restart the
GAB service.
When you enable registration monitoring, GAB takes no action if the HAD process
unregisters with GAB normally, that is if you stop HAD using the hastop command.
About network failure
If a network partition occurs, a cluster can split into two or more separate
sub-clusters. When two clusters join as one, GAB ejects one sub-cluster. GAB
prints diagnostic messages and sends iofence messages to the sub-cluster being
ejected.
The systems in the sub-cluster process the iofence messages depending on the
type of GAB port that a user client process or a kernel module uses:
■
If the GAB client is a user process, then GAB tries to kill the client process.
■
If the GAB client is a kernel module, then GAB panics the system.
The gabconfig command's -k and -j options apply to the user client processes.
The -k option prevents GAB from panicking the system when it cannot kill the user
processes. The -j option panics the system and does not kill the user process
when GAB receives the iofence message.
About quick reopen
If a system leaves cluster and tries to join the cluster before the new cluster is
configured (default is five seconds), the system is sent an iofence message with
reason set to "quick reopen”. When the system receives the message, it tries to kill
the client process.
VCS performance consideration when a service group switches over
The time it takes to switch a service group equals the time to offline a service group
on the source system, plus the time to bring the service group online on the target
system.
543
VCS performance considerations
Monitoring CPU usage
VCS performance consideration when a service group fails over
The time it takes to fail over a service group when a resource faults equals the
following:
■
The time it takes to detect the resource fault
■
The time it takes to offline the service group on source system
■
The time it takes for the VCS policy module to select target system
■
The time it takes to bring the service group online on target system
The time it takes to fail over a service group when a system faults equals the
following:
■
The time it takes to detect system fault
■
The time it takes to offline the dependent service groups on other running
systems
■
The time it takes for the VCS policy module to select target system
■
The time it takes to bring the service group online on target system
The time it takes the VCS policy module to determine the target system is negligible
in comparison to the other factors.
If you have a firm group dependency and the child group faults, VCS offlines all
immediate and non-immediate parent groups before bringing the child group online
on the target system. Therefore, the time it takes a parent group to be brought
online also depends on the time it takes the child group to be brought online.
Monitoring CPU usage
VCS includes a system attribute, CPUUsageMonitoring, which monitors CPU usage
on a specific system and notifies the administrator when usage has been exceeded.
The default values for the CPUUsageMonitoring attribute are:
■
Enabled = 0
■
NotifyThreshold = 0
■
NotifyTimeLimit = 0
■
ActionThreshold = 0
■
ActionTimeLimit = 0
■
Action = NONE.
544
VCS performance considerations
VCS agent statistics
The values for ActionTimeLimit and NotifyTimeLimit represent the time in seconds.
The values for ActionThreshold and NotifyThreshold represent the threshold in
terms of CPU percentage utilization.
If Enabled is set to 1, HAD monitors the usage and updates CPUUsage attribute.
If Enabled is set to 0 (default), HAD does not monitor the usage.
If the system’s CPU usage continuously exceeds the value set in NotifyThreshold
for a duration greater than the value set in NotifyTimeLimit, HAD sends notification
via an SNMP trap or SMTP message.
If the CPU usage continuously exceeds the value set in NotifyThreshold for a
duration greater than the value set in NotifyTimeLimit, subsequent notifications are
sent after five minutes to avoid sending notifications too frequently (if the
NotifyTimeLimit value is set to a value less than five minutes). In this case,
notification is sent after the first interval of NotifyTimeLimit. As CPU usage continues
to exceed the threshold value, notifications are sent after five minutes. If the values
of NotifyThreshold or NotifyTimeLimit are set to 0, no notification is sent.
If system’s CPU usage exceeds the value set in ActionThreshold continuously for
a duration greater than the value set in ActionTimeLimit, the specified action is
taken. If the CPU usage continuously exceeds the ActionThreshold for a duration
greater than the value set in ActionTimeLimit, subsequent action is taken after five
minutes to avoid taking action too frequently (if the ActionTimeLimit value is set to
less than five minutes). In this case action is taken after the first interval of
ActionTimeLimit. As CPU usage continues to exceed the threshold value, action is
taken after five minutes. If the values of ActionThreshold or ActionTimeLimit are
set to 0, no action is taken. Actions can have one of the following values:
NONE: No action will be taken and the message is logged in the VCS engine log.
REBOOT: System is rebooted.
CUSTOM: The cpuusage trigger is invoked.
VCS agent statistics
You can configure VCS to track the time taken for monitoring resources.
You can also detect potential problems with resources and systems on which
resources are online by analyzing the trends in the time taken by the resource's
monitor cycle. Note that VCS keeps track of monitor cycle times for online resources
only.
VCS calculates the time taken for a monitor cycle to complete and computes an
average of monitor times after a specific number of monitor cycles and stores the
average in a resource-level attribute.
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VCS performance considerations
VCS agent statistics
VCS also tracks increasing trends in the monitor cycle times and sends notifications
about sudden and gradual increases in monitor times.
VCS uses the following parameters to compute the average monitor time and to
detect increasing trends in monitor cycle times:
■
Frequency: The number of monitor cycles after which the monitor time average
is computed and sent to the VCS engine.
For example, if Frequency is set to 10, VCS computes the average monitor time
after every 10 monitor cycles.
■
ExpectedValue: The expected monitor time (in milliseconds) for a resource.
VCS sends a notification if the actual monitor time exceeds the expected monitor
time by the ValueThreshold. So, if you set this attribute to 5000 for a FileOnOff
resource, and if ValueThreshold is set to 40%, VCS will send a notification only
when the monitor cycle for the FileOnOff resource exceeds the expected time
by over 40%, that is 7000 milliseconds.
■
ValueThreshold: The maximum permissible deviation (in percent) from the
expected monitor time. When the time for a monitor cycle exceeds this limit,
VCS sends a notification about the sudden increase or decrease in monitor
time.
For example, a value of 100 means that VCS sends a notification if the actual
monitor time deviates from the expected time by over 100%.
VCS sends these notifications conservatively. If 12 consecutive monitor cycles
exceed the threshold limit, VCS sends a notification for the first spike, and then
a collective notification for the next 10 consecutive spikes.
■
AvgThreshold: The threshold value (in percent) for increase in the average
monitor cycle time for a resource.
VCS maintains a running average of the time taken by the monitor cycles of a
resource. The first such computed running average is used as a benchmark
average. If the current running average for a resource differs from the benchmark
average by more than this threshold value, VCS regards this as a sign of gradual
increase or decrease in monitor cycle times and sends a notification about it for
the resource. Whenever such an event occurs, VCS resets the internally
maintained benchmark average to this new average. VCS sends notifications
regardless of whether the deviation is an increase or decrease in the monitor
cycle time.
For example, a value of 25 means that if the actual average monitor time is 25%
more than the benchmark monitor time average, VCS sends a notification.
Tracking monitor cycle times
VCS marks sudden changes in monitor times by comparing the time taken for each
monitor cycle with the ExpectedValue. If this difference exceeds the ValueThreshold,
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VCS performance considerations
VCS agent statistics
VCS sends a notification about the sudden change in monitor time. Note that VCS
sends this notification only if monitor time increases.
VCS marks gradual changes in monitor times by comparing the benchmark average
and the moving average of monitor cycle times. VCS computes the benchmark
average after a certain number of monitor cycles and computes the moving average
after every monitor cycle. If the current moving average exceeds the benchmark
average by more than the AvgThreshold, VCS sends a notification about this gradual
change in the monitor cycle time.
VCS attributes enabling agent statistics
This topic describes the attributes that enable VCS agent statistics.
MonitorStatsParam A resource type-level attribute, which stores the required parameter
values for calculating monitor time statistics.
static str MonitorStatsParam = { Frequency = 10,
ExpectedValue = 3000, ValueThreshold = 100,
AvgThreshold = 40 }
■
■
■
■
MonitorTimeStats
Frequency: Defines the number of monitor cycles after which the
average monitor cycle time should be computed and sent to the
engine. If configured, the value for this attribute must be between
1 and 30. It is set to 0 by default.
ExpectedValue: The expected monitor time in milliseconds for all
resources of this type. Default=3000.
ValueThreshold: The acceptable percentage difference between
the expected monitor cycle time (ExpectedValue) and the actual
monitor cycle time. Default=100.
AvgThreshold: The acceptable percentage difference between the
benchmark average and the moving average of monitor cycle times.
Default=40
Stores the average time taken by a number of monitor cycles specified
by the Frequency attribute along with a timestamp value of when the
average was computed.
str MonitorTimeStats{} = { Avg = "0", TS = "" }
This attribute is updated periodically after a number of monitor cycles
specified by the Frequency attribute. If Frequency is set to 10, the
attribute stores the average of 10 monitor cycle times and is updated
after every 10 monitor cycles.
The default value for this attribute is 0.
547
VCS performance considerations
About VCS performance with non-HA products
ComputeStats
A flag that specifies whether VCS keeps track of the monitor times for
the resource.
boolean ComputeStats = 0
The value 0 indicates that VCS will not keep track of the time taken by
the monitor routine for the resource. The value 1 indicates that VCS
keeps track of the monitor time for the resource.
The default value for this attribute is 0.
About VCS performance with non-HA products
To ensure optimum performance, it is important to evaluate the impact of non-HA
products on cluster nodes. Evaluating factors such as the complexity of the VCS
configuration, the capacity of the hardware to host multiple applications, and the
intended use of the product will assist you in determining how and where to host
the applications.
When modifying the system, consider whether or not the change will cause the
service group to fault. A simple task such as Windows Explorer browsing fileshares
hosted by VCS may seem harmless, but it would prevent VCS from failing over
because the drive is locked by another application.
About VCS performance with SFW
If you use Veritas Storage Foundation for Windows (SFW) on clustered nodes, we
strongly recommend the following:
■
Carefully evaluate changes to underlying storage. Typically, changes to the
volume and disk group configurations require corresponding changes to the
VCS configuration. Common changes include unassigning or reassigning the
drive letters, splitting or joining a disk group, or snapshotting the volume. Prior
to implementing these types of changes, evaluate your configuration to determine
whether to freeze, offline, or fail over the VCS service groups to avoid faulting
the groups inadvertently.
■
Like Cluster Manager, the SFW GUI runs under the Java Runtime environment
and maintains a persistent connection to the SFW engine, from which it receives
regular updates regarding status. For best results, run the SFW GUI on a system
outside the cluster. This will avoid potential impact on node performance.
■
Certain SFW operations, such as rescan, resync, etc., are CPU-intensive and
can affect VCS performance. The VCS kernel module GAB expects the VCS
548
VCS performance considerations
About VCS performance with SFW
engine, HAD, to send heartbeats that ensure the engine is functioning properly.
If the heartbeat interval exceeds five seconds the engine logs an error.
By default, if GAB does not receive a heartbeat from HAD within 15 seconds, GAB
assumes something is wrong and kills HAD (which then gets restarted by hashadow).
You can tune this interval by changing the value of the system variable
VCS_GAB_TIMEOUT, which specifies the number of seconds GAB waits for a
heartbeat before killing HAD.
549
Chapter
20
Troubleshooting and
recovery for VCS
This chapter includes the following topics:
■
VCS message logging
■
Handling network failure
■
Troubleshooting VCS startup
■
Troubleshooting secure clusters
■
Troubleshooting service groups
■
Troubleshooting resources
■
Troubleshooting notification
■
Troubleshooting and recovery for global clusters
■
Troubleshooting the steward process
■
VCS utilities
VCS message logging
VCS generates two error message logs: the engine log and the agent log. Log file
names are appended by letters. Letter A indicates the first log file, B the second,
C the third, and so on.
The engine log is located at %VCS_HOME%\log\engine_A.txt. The format of engine
log messages is:
Timestamp (Year/MM/DD) | Mnemonic | Severity | UMI| Message Text
Troubleshooting and recovery for VCS
VCS message logging
The agent log components are defined as follows:
■
Timestamp: the date and time the message was generated.
■
Mnemonic: the string ID that represents the product (for example, VCS).
■
Severity: levels include CRITICAL, ERROR, WARNING, NOTICE, and INFO
(most to least severe, respectively).
■
UMI: a unique message ID.
■
Message Text: the actual message generated by VCS.
A typical engine log resembles:
2011/02/10 16:08:09 VCS INFO V-16-1-10077 received new cluster
membership.
The agent log is located at %VCS_HOME%\log\agent_A.txt. The format of agent
log messages is:
Timestamp (Year/MM/DD) | Mnemonic | Severity | UMI | Agent Type |
Resource Name | Entry Point | Message Text
A typical agent log resembles:
2011/02/23 10:38:23 VCS WARNING V-16-2-23331
Oracle:VRT:monitor:Open for ora_lgwr failed, setting cookie to
null.
VCW logs
The VCS Cluster Configuration Wizard (VCW) log is located at
%allusersprofile%\Application Data\Veritas\Cluster Server\vcw.log.
Here, %allusersprofile% is the file system directory containing application data for
all users. A typical path is C:\Documents and Settings\All Users\.
The format of the VCW log is
ThreadID | Message Text
■
ThreadID: the ID of the thread initiated by VCW.
■
Message Text: the actual message generated by VCW.
A typical VCW log resembles:
00000576-00000264: ExecMethod return 00000000.
00000576-00000110: CRegistry::Query for VCS License failed.
Error=0x00000000
00000576-00000264: ExecMethod return 00000000.
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Troubleshooting and recovery for VCS
VCS message logging
552
00000576-00000264: ExecMethod return 00000001.
00000576-00000127: QueryDWORDValue returned 0x00000001
00000576-00000132: CRegistry::Query for VxSS Root information failed.
Error=0x00000001
VCWsilent logs
The VCWsilent log is located at <currentdirectory>\vcwsilent.log.
Here, <currentdirectory> is the directory from where the VCWsilent.exe is run.
A typical VCWsilent log resembles:
00005540-00000064: 5540:
selected machines...
00009956-00000064: 9956:
related files...
00009956-00000048: 9956:
files...
00009956-00000048: 9956:
00009956-00000048: 9956:
00009956-00000064: 9956:
00009956-00000048: 9956:
nodes.
STARTING - Discovering NICs on the
STARTING - Generating private network
COMPLETED - Gererating LLT host
COMPLETED - Generating GAB tab files...
COMPLETED - Generating main.cf file...
STARTING - Configuring LLT on all the nodes.
COMPLETED - Configuring LLT on all the
Solutions wizard logs
The Solutions Configuration Center (SCC) provides access to many wizards.
However, the following three wizards are built in to the Solutions Configuration
Center:
■
Disaster Recovery Wizard
■
Fire Drill Wizard
■
Quick Recovery Configuration Wizard
These solutions wizards are launched only from the Solutions Configuration Center,
whereas other wizards can be launched from product consoles or the Start menu.
Logs created by these solutions wizards are located in the following paths:
For Windows Server:
C:\ProgramData\Veritas\winsolutions\log
Troubleshooting and recovery for VCS
Handling network failure
Message catalogs
VCS includes multilingual support for message catalogs. Most binary message
catalogs (BMCs), are stored in %VCS_HOME%\messages\language\. The catalogs
gab.bmc and llt.bmc are stored in %VCS_ROOT%\comms\messages\language\. The
variable language represents a two-letter abbreviation. For example, en represents
English.
The VCS command-line interface displays error/success messages in any language
supported by VCS. The hamsg command displays the VCS engine logs in
VCS-supported languages.
Table 20-1 shows the complete list of BMCs.
Table 20-1
Binary message catalogs
Module Name
Description
VRTSvcsAgfw.bmc
VCS agent framework messages
VRTSvcsAlerts.bmc
Alerts messages
VRTSvcsApi.bmc
VCS API messages
VRTSvcsCommon.bmc
Common messages
VRTSvcsHad.bmc
VCS engine (HAD) messages
VRTSvcsHbfw.bmc
VCS heartbeat framework messages
VRTSvcsTriggers.bmc
VCS triggers messages
VRTSvcsAgentplatform.bmc VCS bundled agent messages
VRTSvcsplatformagent_name.bmc VCS enterprise agent messages
VRTSvcsWac.bmc
Wide-area connector messages
gab.bmc
GAB command-line interface messages
llt.bmc
LLT command-line interface messages
Handling network failure
VCS protects against network partitions by requiring that all systems be connected
by two or more communication channels. In a VCS cluster, all systems send
heartbeats to each other across communication channels. If a system's heartbeats
are not received across one channel, VCS detects that the channel has failed. If a
system's heartbeats are not received across any channels, VCS detects that the
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system has failed. The services running on that system are then restarted on
another.
VCS continues to operate as a single cluster when at least one network channel
exists between the systems. However, when only one channel remains, failover
due to system failure is disabled. Even after the last network connection is lost,
VCS continues to operate as partitioned clusters on each side of the failure.
For more information on protecting your cluster against network failure: See
“Verifying LLT, GAB, and cluster operation” on page 562.
Disabling failover
When VCS loses communication with a system, a new regular membership is issued
that excludes the departed system. VCS must then determine if it should restart
that system's services, or if the system is running services outside of communication
with VCS. Two conditions indicate that the system could still be running the services:
■
Prior to the system's departure, the systems remaining in the new membership
were connected to the departed system by only one communication channel.
■
The departed system continues writing heartbeats to disk. VCS detects these
conditions using the jeopardy membership.
If there is at least one system in the new regular membership that was not part of
the prior jeopardy membership, then failover is disabled only for those systems that
left the regular membership and were part of the prior jeopardy membership. Failover
is also disabled for systems that are in the new jeopardy membership and outside
of the new regular membership. This indicates these systems are actively writing
heartbeats to disk. If there are no systems in the new regular membership that were
not part of the previous jeopardy membership, failover is disabled for all systems
that have departed. This indicates that connections from the remaining systems to
all systems in the prior regular membership were potentially unreliable.
Example of how VCS handles network failure
In the following example, a single cluster has two networks connecting four nodes.
Figure 20-1 shows an example of a single VCS clusters with four nodes and two
networks connecting them.
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Figure 20-1
VCS and network failure: Four node cluster
Public Network
Node 0
Node 1
Node 2
Node 3
Regular membership: 0,1,2,3
Jeopardy scenario: link failure
In this scenario, a link to node 2 fails, leaving the node with only one possible
heartbeat.
Figure 20-2 shows a jeopardy scenario within a four node cluster where a link to
node 2 fails.
Figure 20-2
VCS and network failure: Link to node 2 fails.
Public Network
Node 0
Node 1
Node 2
Node 3
Regular membership: 0,1,2,3
Jeopardy membership: 2
A new cluster membership is issued with nodes 0, 1, 2, and 3 in the regular
membership and node 2 in a jeopardy membership. All normal cluster operations
continue, including normal failover of service groups due to resource fault.
Jeopardy scenario: link and node failure
Consider that in the previous link-failure scenario, node 2 fails due to a power fault.
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Figure 20-3 shows a jeopardy scenario, where node 2 fails and subsequently the
service groups running on node 2 also fail leading to link and node failure.
VCS and network failure: Node 2 in jeopardy membership
Figure 20-3
Public Network
Node 0
Node 1
Node 2
Node 3
Regular membership: 0,1,3 (with
known previous jeopardy
membership for node 2)
All other systems recognize that node 2 has faulted. In this situation, a new
membership is issued for nodes 0, 1 and 3 as regular members. Since node 2 was
in a jeopardy membership, service groups running on node 2 are autodisabled, so
no other node can assume ownership of these service groups. If the node is actually
failed, the system administrator can clear the AutoDisabled flag on the service
groups in question and online the groups on other systems in the cluster.
Jeopardy scenario: failure of all links
In the scenario depicted in the illustration below, node 2 loses both heartbeats.
See “The -scsitest command options” on page 588. shows a jeopardy scenario where
node 2 loses both heartbeats.
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VCS and network failure: Node 2 forms a single-node-mini cluster
Figure 20-4
Public Network
Node 0
Node 1
Node 2
Node 3
Regular membership: 0,1,3
(Cluster 1)
Regular membership: 2 (Cluster 2)
In this situation, a new membership is issued for node 0, 1 and 3 as regular
members. Since node 2 was in a jeopardy membership, service groups running on
node 2 are autodisabled, so no other node can assume ownership of these service
groups. Nodes 0, 1 and 3 form a mini-cluster. Node 2 forms another single-node
mini-cluster. All service groups that were present on nodes 0, 1 and 3 are
autodisabled on node 2.
Network partitioning
With VCS, two or more communication channels guard against network partitioning;
a condition where a failure on the network is misinterpreted as a failure of one or
more systems in the cluster. If one system in the cluster assumes wrongly that
another system has failed, it may restart applications already running on the other
system, thereby corrupting the data.
Using a second communication channel enables VCS to distinguish between network
and system failures. If all but one network channel fails, VCS enters a degraded
mode that disables automatic application failover caused by system failure. If the
last network channel fails, VCS splits into multiple "mini-clusters" without failing
over or shutting down applications. This design enables administrative services to
operate uninterrupted; for example, you can use VCS to shut down applications
during system maintenance. When connections are restored, systems will attempt
to rejoin into a single cluster. By default, GAB kills processes associated with ports
on rejoining systems. To avoid potential data corruption during rejoin, add the option
-j to the gabconfig command to enable system halt after a split. The gabconfig
command is located in %VCS_ROOT%\comms\gab.
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When VCS shuts down a system
In some cases, VCS kernel components may intentionally bring down a system to
avoid network partitioning. See the Veritas Cluster Server Release Notes for details.
Pre-existing network partitions
A pre-existing network partition refers to failures in communication channels that
occur while the systems are down. Regardless of whether the cause is scheduled
maintenance or system failure, VCS cannot respond to failures when systems are
down. This leaves VCS vulnerable to network partitioning when the systems are
booted. VCS seeding is designed to help prevent this situation.
Seeding of VCS clusters
To protect your cluster from a pre-existing network partition, VCS employs the
concept of a seed. Nodes can be seeded automatically or manually. Only those
nodes that have been seeded can run VCS.
By default, when a node comes up, it is not seeded. When the last node in a cluster
is booted, the cluster will seed and start VCS on all the nodes. Nodes can then be
brought down and restarted in any combination. Seeding is automatic as long as
at least one instance of VCS is running in the cluster.
Nodes are seeded automatically in one of the following ways:
■
When an unseeded node communicates with a seeded node
■
When all the nodes in the cluster are unseeded but able to communicate with
each other
VCS requires that you declare the number of nodes that will participate in the cluster.
Before VCS can accept HA commands, the cluster nodes must be seeded. If the
nodes are not seeded and you attempt to issue a command, VCS returns the
following error:
VCS:11037:Node has not received cluster membership yet, cannot
process HA command
The number of nodes participating in a cluster could change. A possible scenario
is that one or more nodes are down for maintenance when the cluster comes up.
In this scenario, the cluster does not seed automatically and therefore VCS does
not start successfully. To overcome this issue, you can manually seed the cluster
with the currently available nodes.
Before manually seeding the cluster, make sure of the following:
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■
The nodes participating in the cluster are able to send and receive heartbeats
to each other.
■
There is no possibility of a network partition condition in the cluster.
Warning: Symantec recommends that you do not seed the cluster manually, unless
you are aware of the associated risks and implications.
To manually seed a cluster
◆
Run the following command from only one of the operational nodes:
gabconfig -x
This command seeds all the nodes that communicate with the node on which
you run this command.
Note: This seeding is not persistent. If you restart the operational cluster nodes,
you will need to rerun this command.
You can also seed a cluster by updating the %VCS_ROOT%\comms\gab\gabtab.txt
file. By default, VCS records the total number of nodes in the cluster in this file. If
the number of nodes that actually participate in the cluster is lower, modify
gabtab.txt manually.
To manually seed a cluster and make the changes persistent
1
Determine the number of nodes that are operational in the cluster.
2
For each cluster node, modify the following line in gabtab.txt:
gabconfig -c -n numberOfNodes
Set numberOfNodes to the number of currently operational nodes.
When you save gabtab.txt, these changes are made persistent. However,
for this change to take effect, you need to perform the next step.
3
■
To seed the cluster without any application down time, do one of the
following:
■
Run the following command on any one operational node:
gabconfig -x
■
Restart the VCS communication stack by running the following
commands sequentially on each operational node:
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taskkill /f /im hashadow.exe
taskkill /f /im had.exe
Ensure that the hashadow and had processes are killed. Then, proceed
with the following commands:
net stop vcscomm
net stop gab
net stop llt
Finally, run the following command on any one operational node:
hastart -all
■
If some application down time is acceptable, reboot each operational node
individually so that the changes to gabtab.txt take effect.
Reconnecting the private network
When a final network connection is lost, the systems on each side of the network
partition segregate into mini-clusters.
Reconnecting a private network after a cluster has been segregated causes HAD
to stop and restart.
Following are the rules that determine the systems that will be affected:
■
On a two-node cluster, the system with the lowest LLT host ID stays running
and the higher recycles HAD.
■
In a multi-node cluster, the largest running group stays running. The smaller
groups recycle HAD.
■
On a multi-node cluster splitting into two equal size clusters, the cluster with the
lowest node number stays running. The higher group recycles HAD.
Troubleshooting VCS startup
When VCS is started, GAB, LLT, and HAD are started automatically. If they are
not, review the corresponding log file. Startup errors for LLT and GAB are stored
in the System Event log. Startup errors for HAD are stored in the Application Event
log.
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To view log files
1
From the Control Panel, double-click Administrative Tools, then Event Viewer.
2
Review the System Log to view LLT and GAB errors.
3
Review the Application Log to view HAD errors.
Low Latency Transport (LLT)
During installation, an llttab.txt configuration file containing minimum directives is
created and placed in the following directory on each node in the cluster:
Drive:\Program Files\VERITAS\comms\llt
Each llttab.txt file specifies the node's ID, the network interfaces to use, and other
directives.
For the most common LLT directives:
See “Common LLT directives” on page 561.
Note: The directives must always appear as they are listed in the original default
llttab.txt file.
Common LLT directives
This topic lists the common LLT directives:
link
Attaches LLT to a network interface. At least one link is required, and
up to eight are supported. The first argument to link is a user-defined
tag shown in the lltstat output to identify the link. It may also be
used in llttab.txt to set optional static MAC addresses.
The second argument to link is the device name of the network
interface. (To obtain network device names, use the objdir\device
command provided by the Windows 2000 Device Driver Kit.) There
should be one link directive for each network interface, and each
network interface configured for LLT must be attached to a separate
physical network. LLT uses an unregistered Ethernet SAP of 0xCAFE.
If the SAP is unacceptable, refer to the llttab.txt online Help for
information on how to customize SAP. Note that IP addresses need
not be assigned to the network device because LLT does not use IP
addresses.
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link-lowpri
Use this directive in place of link for public network interfaces. This
directive prevents VCS communication on the public network until the
network is the last link, and reduces the rate of heartbeat broadcasts.
Note that LLT distributes network traffic evenly across all available
network connections and broadcasts heartbeats to monitor each network
connection.
set-cluster
Assigns a unique cluster number. Use this directive when more than
one cluster is configured on the same physical network connection.
Note that LLT uses a default cluster number of zero.
set-node
Assigns the node ID. This number must be unique for each node in the
cluster, and must be between 0-31.
Note: LLT fails to operate if nodes share the same ID.
start
This directive must always appear last.
Group Membership Atomic Broadcast (GAB)
During installation, a gabtab.txt configuration file is automatically created and placed
in the following directory on each system in the cluster:
Drive:\Program Files\VERITAS\comms\gab
Verifying LLT, GAB, and cluster operation
Before verifying LLT, GAB, or cluster operation, you must log on to any node in the
cluster using an account with administrator privileges.
Verifying LLT
Use the lltstat command to verify the links are active for LLT. This command
returns information about the LLT links for the node on which it is typed.
In the following example, lltstat -n is typed on System 0 and System 1 in a
private network.
System 0
Drive:\>lltstat -n
LLT node information:
Node
State
* 0 System 0
OPEN
1 System 1
OPEN
System 1
Links
2
2
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Drive:\>lltstat -n
LLT node information:
Node
State
0 System 0
OPEN
*1 System 1
OPEN
Links
2
2
Note that each node has two links and each node is in the OPEN state. The asterisk
(*) denotes the node on which the command is typed.
If the output of lltstat -n does not show each node in the cluster, or does not
show two links for each node, type lltstat -nvv | to view additional information
about LLT.
In the following example, lltstat -nvv | more is typed on System 0 in a private
network. Note that each node should be OPEN, each link should be UP, and each
address should be correct.
Drive:\> lltstat -nvv |
Node
* 0 HOUWIN201
more
State
OPEN
Link
Adapter0
Adapter1
Status
UP
UP
Address
00:03:47:0D:A8:74
00:03:47:0D:A8:75
1 HOUWIN202
OPEN
Adapter0
Adapter1
UP
UP
00:03:47:0D:A4:46
00:03:47:0D:A4:47
2
CONNWAIT
Adapter0
Adapter1
DOWN
DOWN
3
CONNWAIT
Adapter0
Adapter1
DOWN
DOWN
4
CONNWAIT
Adapter0
Adapter1
DOWN
DOWN
5
CONNWAIT
Adapter0
Adapter1
DOWN
DOWN
6
CONNWAIT
Adapter0
Adapter1
DOWN
DOWN
7
CONNWAIT
Adapter0
Adapter1
DOWN
DOWN
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8
CONNWAIT
Adapter0
Adapter1
DOWN
DOWN
9
CONNWAIT
Adapter0
Adapter1
DOWN
DOWN
10
CONNWAIT
Adapter0
Adapter1
DOWN
DOWN
12
CONNWAIT
Adapter0
Adapter1
DOWN
DOWN
13
CONNWAIT
Adapter0
Adapter1
DOWN
DOWN
14
CONNWAIT
Adapter0
Adapter1
DOWN
DOWN
15
CONNWAIT
Adapter0
Adapter1
DOWN
DOWN
-- More --
To obtain information only about the configured systems in the cluster, use the
lltstat -nvv configured command. See the following example:
Drive:\>lltstat -nvv configured
Node
* 0 HOUWIN201
State
OPEN
Link
Adapter0
Adapter1
Status
UP
UP
Address
00:03:47:0D:A8:74
00:03:47:0D:A8:75
1 HOUWIN202
OPEN
Adapter0
Adapter1
UP
UP
00:03:47:0D:A4:46
00:03:47:0D:A4:47
To obtain information about the ports open for LLT, type lltstat -p on any node.
In the following example, lltstat -p is typed on System 0 in a private network.
Drive:\> lltstat -p
LLT port information:
Port
0
Usage
gab
Cookie
0x0
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opens:
0 1 2 3 4 5 6 7 8 9
connects:
0 1
10 11 12 13 14...
Note that two nodes (0 and 1) are connected.
Setting the checksum option
Do not use these options unless you are asked to do so by a qualified Technical
Support representative.
lltconfig -K 0 | 1 | 2
Checksum
setting options
Action
0
Disable checksums
1
Calcuate checksum value for header.
When set to 1, LLT checksums each packet it sends to peer to guard
against packet corruption on the wire. LLT also offloads checksum
calculation to the hardware if the underlying NIC supports it.
In case checksum verification fails on the receiver LLT drops that packet,
causing the sender to retransmit it.
2
565
Checksum calculated for header and message.
When set to 2, LLT also checksums the whole data buffer submitted
by the client to be verified by the peer before delivering it to peer-client.
In case the checksum verification fails on the receiver, LLT panics the
machine. This is purposefully done to help in analysis of memory
corruption from a crash dump.
You can also set the checksum by adding the following information to the lltconfig
file
set-checksum 0 | 1 | 2
Verifying GAB
To verify GAB operation, type the following command as Administrator on each
node:
Drive:\> gabconfig -a
If GAB is operating, the following GAB port membership information is returned:
Troubleshooting and recovery for VCS
Troubleshooting VCS startup
GAB Port Memberships===================================
Port
a
gen
a36e0003
membership 01
Port
h
gen
fd570002
membership 01
Port a indicates GAB is communicating, gen a36e0003 is a random generation
number, and membership 01 indicates nodes 0 and 1 are connected.
If GAB is not operating, no GAB port membership information is returned:
GAB Port Memberships===================================
If only one network is connected, the following GAB port membership information
is returned:
GAB Port Memberships
===================================
Port
a
gen
membership
Port
a
gen
jeopardy ;1
Port
h
gen
membership
Port
h
gen
jeopardy
;1
a36e0003
01
a36e0003
fd570002
01
fd570002
Verifying HAD
To verify HAD operation, type the following command as Administrator on each
node:
Drive:\> gabconfig
-a
If HAD is operating, the following port membership information is returned:
GAB Port Memberships
===================================
Port
a
gen
membership 01
Port
h
gen
membership 01
a36e0003
fd570002
Port h indicates HAD is started, gen fd570002 is a random generation number, and
membership 01 indicates nodes 0 and 1 are both running VCS.
If HAD is not operating, no port membership information is returned.
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GAB Port Memberships
===================================
For instructions on how to seed the cluster:
See “Seeding of VCS clusters” on page 558.
If HAD is running on only one node, the following port membership information is
returned:
GAB Port Memberships
===================================
Port
a
gen
a36e0003
Port
h
gen
fd570002
Port
h
gen
fd51002
membership 01
membership 0
visible ;1
This information indicates HAD is running on node 1, but only GAB is running on
node 0. Check the Application Event Log on node 0 for more information.
Verifying the cluster
To verify cluster operation, type the following command as Administrator on any
node:
Drive:\>hasys -display
#System
Attribute
Value
HOUWIN201
AgentsStopped
0
HOUWIN201
AvailableCapacity
100
HOUWIN201
CPUUsage
0
HOUWIN201
CPUUsageMonitoring
Enable 0 ActionThreshold 0
ActionTimeLimit 0 Action NONE NotifyThreshold 0 NotifyTimeLimit 0
HOUWIN201
Capacity
100
HOUWIN201
ConfigBlockCount
84
HOUWIN201
ConfigCheckSum
18907
HOUWIN201
ConfigDiskState
CURRENT
HOUWIN201
ConfigFile
C:\Program
Files\VERITAS\Cluster Server\conf\config
HOUWIN201
ConfigInfoCnt
0
HOUWIN201
ConfigModDate
Tue Dec 03 15:13:58 2001
HOUWIN201
CurrentLimits
HOUWIN201
DiskHbStatus
HOUWIN201
DynamicLoad
0
HOUWIN201
Frozen
0
HOUWIN201
GUIIPAaddr
HOUWIN201
LLTNodeId
0
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HOUWIN201
Limits
HOUWIN201
LinkHbStatus
Adapter0 UP Adapter1 UP
HOUWIN201
LoadTimeCounter
0
HOUWIN201
LoadTimeThreshold
600
HOUWIN201
LoadWarningLevel
80
HOUWIN201
MajorVersion
2
HOUWIN201
MinorVersion
0
HOUWIN201
NodeID
0
HOUWIN201
OnGrpCnt
1
HOUWIN201
ShutdownTimeout
60
HOUWIN201
SourceFile
.\main.cf
HOUWIN201
SysInfo
WINNT:HOUWIN201,5.0,2195,
Service Pack 2, INTEL,1
HOUWIN201
SysName
HOUWIN201
HOUWIN201
SysState
RUNNING
HOUWIN201
SystemLocation
HOUWIN201
SystemOwner
HOUWIN201
TFrozen
0
HOUWIN201
TRSE
0
HOUWIN201
UpDownState
Up
HOUWIN201
UserInt
0
HOUWIN201
UserStr
#
HOUWIN202
AgentsStopped
0
HOUWIN202
AvailableCapacity
100
HOUWIN202
CPUUsage
0
HOUWIN202
CPUUsageMonitoring
Enable 0 ActionThreshold 0
ActionTimeLimit 0 Action NONE NotifyThreshold 0NotifyTimeLimit 0
HOUWIN202
Capacity
100
HOUWIN202
ConfigBlockCount
84
HOUWIN202
ConfigCheckSum
18907
HOUWIN202
ConfigDiskState
CURRENT
HOUWIN202
ConfigFile
C:\Program Files\VERITAS\
Cluster Server\conf\config
HOUWIN202
ConfigInfoCnt
0
HOUWIN202
ConfigModDate
Tue Dec 03 15:15:58 2001
HOUWIN202
CurrentLimits
HOUWIN202
DiskHbStatus
HOUWIN202
DynamicLoad
0
HOUWIN202
Frozen
0
HOUWIN202
GUIIPAaddr
HOUWIN202
LLTNodeIdHOUWIN202
Limits
HOUWIN202
LinkHbStatus
Adapter0 UP Adapter1 UP
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HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
Service Pack
HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
HOUWIN202
LoadTimeCounter
LoadTimeThreshold
LoadWarningLevel
MajorVersion
MinorVersion
NodeID
OnGrpCnt
ShutdownTimeout
SourceFile
SysInfo
2, INTEL,1
SysName
SysState
SystemLocation
SystemOwner
TFrozen
TRSE
UpDownState
UserInt
UserStr
0
600
80
2
0
1
1
60
.\main.cf
WINNT:HOUWIN202,5.0,2195,
RUNNING
0
0
Up
0
Note the value for the attribute ConfigFile is an empty file created by default to
enable VCS to start. Also note the value of the attribute SysState is RUNNING,
which indicates VCS is started. This output indicates VCS was successfully installed
on both nodes in the cluster.
VCS startup errors
This topic includes error messages associated with starting VCS and provides
descriptions of each error and the recommended action.
"VCS:10622 local configuration missing"
"VCS:10623 local configuration invalid"
"VCS:10624 local configuration stale"
The local configuration is invalid.
Recommended Action: Start the VCS engine, HAD, on another system that has a
valid configuration file. The system with the configuration error "pulls" the valid
configuration from the other system.
Another method is to correct the configuration file on the local system and force
VCS to reread the configuration file. If the file appears valid, verify that is not an
earlier version. It is possible that VCS marked the configuration stale by creating a
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.stale file because the last VCS shutdown was not graceful. The .stale file is created
in the directory %VCS_HOME%\conf\config.
Type the following commands to verify the configuration and force VCS to reread
the configuration file:
C:\> cd %VCS_HOME\conf\config
C:\> hacf -verify .
C:\> hasys -force system
"VCS:11032 registration failed. Exiting"
GAB was not registered or has become unregistered.
Recommended Action: GAB is registered by the gabconfig command in the file
%VCS_ROOT%\comms\gab\gabtab.txt. Verify that the file exists and that it contains
the command gabconfig -c.
GAB can become unregistered if LLT is set up incorrectly. Verify that the file is
correct in %VCS_ROOT%\comms\llt\llttab.txt. If the LLT configuration is incorrect,
make the appropriate changes and reboot.
"Waiting for cluster membership."
This indicates that GAB may not be seeded. If this is the case, the command
gabconfig -a does not show any members, and the following messages may
appear on the console or in the event log.
GAB: Port a registration waiting for seed port membership
GAB: Port h registration waiting for seed port membership
The following message will also be sent to the engine log:
Did not receive cluster membership, manual intervention may be
needed for seeding
Seeding the cluster
Perform the following steps to seed the cluster:
To seed the cluster
1
Verify the value of gabconfig -c in the file %VCS_ROOT%\comms\gab\gabtab.txt
is the same for all nodes.
2
Determine how many nodes are operational.
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3
For each cluster node, modify gabtab.txt to reflect the required number of
members to seed are equal to the number of cluster nodes in operation.
4
Reboot each node, or stop HAD -force on all nodes and restart.
See “Seeding of VCS clusters” on page 558.
Cluster name contains Unicode characters
If Unicode characters are used to define a cluster name, the Symantec High
Availability Configuration wizard successfully configures the VCS cluster. However,
after the configuration workflow is complete, the VCS cluster transitions to the
STALE_ADMIN_WAIT state and fails to start.
This issue occurs because Unicode characters are not permitted in the main.cf file.
If you encounter this issue, you must change the cluster name to an acceptable
value.
To change cluster name
1
Take the service group offline.
2
Stop the HAD service on all nodes in the cluster using the command:
hastop -all -force
3
Navigate to the %vcs_home%\conf\config folder and open the main.cf file.
4
Change the cluster name and save the main.cf file.
5
Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\VERITAS\VCS\Base in the registry.
6
Change the value of ClusterName (REG_SZ) to the new cluster name as
mentioned in the main.cf file.
7
On all nodes in the cluster, update the registry key as described in the previous
two steps.
8
From any node in the cluster, start the HAD service using the command:
hastart -all
Cluster ID is not unique over a network
Each cluster in a network must have a unique ID. If one or more clusters in a network
have the same ID, the VCS cluster fails to start.
If you encounter this issue, you must change the cluster ID to a unique value.
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Troubleshooting and recovery for VCS
Troubleshooting secure clusters
To change cluster ID
1
Take the service group offline.
2
Stop the HAD service on all nodes in the cluster using the command:
hastop -local
3
Stop the GAB service using the command:
net stop gab
4
Stop the LLT service using the command:
net stop llt
5
Navigate to the %vcs_root%\comms\llt folder and open the llttab.txt file.
6
Update the line set-cluster old_id to set-cluster new_id, and save and
close the llttab.txt file.
7
Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\VERITAS\VCS\Base in the registry.
8
Change the value of ClusterID (REG_DWORD) to the new cluster ID.
9
On all nodes in the cluster, update the registry key as described in the previous
two steps.
10 From any node in the cluster, start the HAD service using the command:
hastart -all
Troubleshooting secure clusters
"Error returned from engine: HAD on this node not accepting clients."
This error occurs when an HA command fails because the VCS engine could not
initialize its security credentials. When this occurs, the following message is logged
to the event log:
"Security ON. Init failed. Clients will be rejected."
Recommended action:
■
Verify the Symantec Product Authentication Service configuration. Make sure
the cluster was configured to run in secure mode before the SecureClus attribute
was set to 1.
■
Verify the Veritas Authentication Service is running. Stop and restart the service.
■
Restart the VCS engine (HAD) on the node.
"Unable to connect to the VCS engine securely."
Recommended action:
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Troubleshooting service groups
■
Verify the Veritas Authentication Service is running. Stop and restart the service.
■
Restart the VCS engine (HAD) on the node.
Troubleshooting service groups
This topic cites the most common problems associated with bringing service groups
online and taking them offline. Recommended action is also included, where
applicable.
System is not in RUNNING state.
Recommended action: Type hasys -display system to verify the system is running.
For more information on system states:
See “System states” on page 603.
Service group not configured to run on the system.
The SystemList attribute of the group may not contain the name of the system.
Recommended action: Use the output of the command hagrp -display
service_group to verify the system name.
Service group not configured to autostart.
If the service group is not starting automatically on the system, the group may not
be configured to AutoStart, or may not be configured to AutoStart on that particular
system.
Recommended action: Use the output of the command hagrp -display
service_group to verify the values of the AutoStart and AutoStartList attributes.
Service group is frozen.
Recommended action: Use the output of the command hagrp -display
service_group to verify the value of the Frozen and TFrozen attributes. Use the
command hagrp -unfreeze to unfreeze the group. Note that VCS will not take a
frozen service group offline.
Service group autodisabled.
When VCS does not know the status of a service group on a particular system, it
autodisables the service group on that system. Autodisabling occurs under the
following conditions:
■
When the VCS engine, HAD, is not running on the system.
■
When all resources within the service group are not probed on the system.
■
When a particular system is visible through disk heartbeat only.
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Troubleshooting service groups
Under these conditions, all service groups that include the system in their SystemList
attribute are autodisabled. This does not apply to systems that are powered off.
Recommended action: Use the output of the command hagrp -display
service_group to verify the value of the AutoDisabled attribute.
Warning: To bring a group online manually after VCS has autodisabled the group,
make sure that the group is not fully or partially active on any system that has the
AutoDisabled attribute set to 1 by VCS. Specifically, verify that all resources that
may be corrupted by being active on multiple systems are brought down on the
designated systems. Then, clear the AutoDisabled attribute for each system:
C:\> hagrp -autoenable service_group -sys system
Failover service group is online on another system.
The group is a failover group and is online or partially online on another system.
Recommended action: Use the output of the command hagrp -display
service_group to verify the value of the State attribute. Use the command hagrp
-offline to offline the group on another system.
Service group is waiting for the resource to be brought online/taken offline.
Recommended action: Review the IState attribute of all resources in the service
group to locate which resource is waiting to go online (or which is waiting to be
taken offline). Use the hastatus command to help identify the resource. See the
engine and agent logs for information on why the resource is unable to be brought
online or be taken offline.
To clear this state, make sure all resources waiting to go online/offline do not bring
themselves online/offline. Use the command hagrp -flush to clear the internal
state of VCS. You can now bring the service group online or take it offline on another
system.
A critical resource faulted.
Output of the command hagrp -display service_group indicates that the service
group has faulted.
Recommended action: Use the command hares -clear to clear the fault.
Service group is waiting for a dependency to be met.
Recommended action: To see which dependencies have not been met, type hagrp
-dep service_group to view service group dependencies, or hares -dep resource
to view resource dependencies.
Service group not fully probed.
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Troubleshooting resources
This occurs if the agent processes have not monitored each resource in the service
group. When the VCS engine, HAD, starts, it immediately "probes" to find the initial
state of all of resources. (It cannot probe if the agent is not returning a value.) A
service group must be probed on all systems included in the SystemList attribute
before VCS attempts to bring the group online as part of AutoStart. This ensures
that even if the service group was online prior to VCS being brought up, VCS will
not inadvertently bring the service group online on another system.
Recommended action: Use the output of hagrp -display service_group to see
the value of the ProbesPending attribute for the system's service group. (It should
be zero.) To determine which resources are not probed, verify the local Probed
attribute for each resource on the specified system. Zero means waiting for probe
result, 1 means probed, and 2 means VCS not booted. See the engine and agent
logs for information.
ClusterService group configuration
If you run the hastop -local command on a node that is not defined in the
ClusterService group's SystemList and has other service groups online, VCS takes
the service groups offline on the node and the node gets stuck in the LEAVING
state.
To prevent this from happening, make sure that the ClusterService group is defined
on all nodes in the cluster. In other words, the SystemList attribute of the
ClusterService group must contain all nodes in the cluster.
Troubleshooting resources
This section cites the most common problems associated with bringing resources
online and taking them offline. Recommended action is also included, where
applicable.
Service group brought online due to failover.
VCS attempts to bring resources online that were already online on the failed system,
or were in the process of going online. Each parent resource must wait for its child
resources to be brought online before starting.
Recommended Action: Verify that the child resources are online.
Waiting for service group states.
The state of the service group prevents VCS from bringing the resource online.
Recommended action: For more information on states:
See “Remote cluster states” on page 601.
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Troubleshooting notification
Waiting for child resources.
One or more child resources of parent resource are offline.
Recommended Action: Bring the child resources online first.
Waiting for parent resources.
One or more parent resources are online.
Recommended action: Take the parent resources offline first.
Waiting for resource to respond.
The resource is waiting to come online or go offline, as indicated. VCS directed the
agent to run an online entry point for the resource.
Recommended Action: Verify the resource's IState attribute. See the engine and
agent logs for information on why the resource cannot be brought online.
Agent not running.
The resource's agent process is not running.
Recommended action: Use hastatus -summary to see if the agent is listed as
faulted. Restart the agent:
C:\> haagent -start resource_type -sys
system
Invalid agent argument list.
The scripts are receiving incorrect arguments.
Recommended action: Verify that the arguments to the scripts are correct. Use the
output of hares -display resource to see the value of the ArgListValues attribute.
If the ArgList attribute was dynamically changed, stop the agent and restart it.
To stop the agent, type:
C:\> haagent -stop resource_type -sys
system
To restart the agent, type:
C:\> haagent -start
resource_type -sys system
Troubleshooting notification
Occasionally you may encounter problems when using VCS notification. This section
cites the most common problems and the recommended actions.
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Troubleshooting and recovery for global clusters
Notifier is configured but traps are not seen on SNMP console.
Recommended action: Verify the version of SNMP traps supported by the console:
VCS notifier sends SNMP v2.0 traps. If you are using HP OpenView Network Node
Manager as the SNMP, verify events for VCS are configured using xnmevents. You
may also try restarting the OpenView daemon (ovw) if, after merging VCS events
in vcs_trapd, the events are not listed in the OpenView Network Node Manager
Event configuration.
By default, notifier assumes the community string is public. If your SNMP console
was configured with a different community, reconfigure it according to the notifier
configuration.
Troubleshooting and recovery for global clusters
This topic describes the concept of disaster declaration and provides troubleshooting
tips for configurations using global clusters.
Disaster declaration
When a cluster in a global cluster transitions to the FAULTED state because it can
no longer be contacted, failover executions depend on whether the cause was due
to a split-brain, temporary outage, or a permanent disaster at the remote cluster.
If you choose to take action on the failure of a cluster in a global cluster, VCS
prompts you to declare the type of failure.
■
Disaster, implying permanent loss of the primary data center
■
Outage, implying the primary may return to its current form in some time
■
Disconnect, implying a split-brain condition; both clusters are up, but the link
between them is broken
■
Replica, implying that data on the takeover target has been made consistent
from a backup source and that the RVGPrimary can initiate a takeover when
the service group is brought online. This option applies to VVR environments
only.
You can select the groups to be failed over to the local cluster, in which case VCS
brings the selected groups online on a node based on the group's FailOverPolicy
attribute. It also marks the groups as being offline in the other cluster. If you do not
select any service groups to fail over, VCS takes no action except implicitly marking
the service groups as offline on the downed cluster.
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Troubleshooting and recovery for global clusters
Lost heartbeats and the inquiry mechanism
The loss of internal and all external heartbeats between any two clusters indicates
that the remote cluster is faulted, or that all communication links between the two
clusters are broken (a wide-area split-brain).
A configuration with more than two clusters must distinguish between the two
(Systems A and B) by querying the remaining clusters to confirm the remote cluster
to which heartbeats have been lost is truly down. This mechanism is referred to as
"Inquiry." If in a two-cluster configuration a connector loses all heartbeats (internal
and external) to the other connector, it must consider the remote cluster faulted. If
there are more than two clusters and a connector loses all heartbeats to a second
cluster, it queries the remaining connectors regarding their "view" of the cluster in
question before declaring it faulted. If the other connectors view the cluster as
running (a negative inquiry), the querying connector transitions the cluster to the
UNKNOWN state, a process that minimizes false cluster faults. If all connectors
report that the cluster is faulted (a positive inquiry), the querying connector also
considers it faulted and transitions the remote cluster state to FAULTED.
VCS alerts
VCS alerts are identified by the alert ID, which is comprised of the following
elements:
■
alert_type—The type of the alert.
See “Types of alerts” on page 578.
■
cluster—The cluster on which the alert was generated
■
system—The system on which this alert was generated
■
object—The name of the VCS object for which this alert was generated. This
could be a cluster or a service group.
Alerts are generated in the following format:
alert_type-cluster-system-object
For example:
GNOFAILA-Cluster1-oracle_grp
This is an alert of type GNOFAILA generated on cluster Cluster1 for the service
group oracle_grp.
Types of alerts
VCS generates the following types of alerts.
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Troubleshooting and recovery for global clusters
■
CFAULT—Indicates that a cluster has faulted
■
GNOFAILA—Indicates that a global group is unable to fail over within the cluster
where it was online. This alert is displayed if the ClusterFailOverPolicy attribute
is set to Manual and the wide-area connector (wac) is properly configured and
running at the time of the fault.
■
GNOFAIL—Indicates that a global group is unable to fail over to any system
within the cluster or in a remote cluster.
Some reasons why a global group may not be able to fail over to a remote
cluster:
■
The ClusterFailOverPolicy is set to either Auto or Connected and VCS is
unable to determine a valid remote cluster to which to automatically the group
over.
■
The ClusterFailOverPolicy attribute is set to Connected and the cluster in
which the group has faulted cannot communicate with one ore more remote
clusters in the group's ClusterList.
■
The wide-area connector (wac) is not online or is incorrectly configured in
the cluster in which the group has faulted
Managing alerts
Alerts require user intervention. You can respond to an alert in the following ways:
■
If the reason for the alert can be ignored, use the Alerts dialog box in the Java
or Web consoles or the haalert command to delete the alert. You must provide
a comment as to why you are deleting the alert; VCS logs the comment to engine
log.
■
Take an action on administrative alerts that have actions associated with them.
You can do so using the Java or Web consoles.
See “Actions associated with alerts” on page 579.
■
VCS deletes or negates some alerts when a negating event for the alert occurs.
See “Negating events” on page 580.
An administrative alert will continue to live if none of the above actions are performed
and the VCS engine (HAD) is running on at least one node in the cluster. If HAD
is not running on any node in the cluster, the administrative alert is lost.
Actions associated with alerts
This section describes the actions you can perform from the Java and the Web
consoles on the following types of alerts:
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Troubleshooting the steward process
■
CFAULT—When the alert is presented, clicking Take Action guides you through
the process of failing over the global groups that were online in the cluster before
the cluster faulted.
■
GNOFAILA—When the alert is presented, clicking Take Action guides you
through the process of failing over the global group to a remote cluster on which
the group is configured to run.
■
GNOFAIL—There are no associated actions provided by the consoles for this
alert
Negating events
VCS deletes a CFAULT alert when the faulted cluster goes back to the running
state
VCS deletes the GNOFAILA and GNOFAIL alerts in response to the following
events:
■
The faulted group's state changes from FAULTED to ONLINE.
■
The group's fault is cleared.
■
The group is deleted from the cluster where alert was generated.
Troubleshooting the steward process
When you start the steward, it blocks the command prompt and prints messages
to the standard output. To stop the steward, run the following command from a
different command prompt of the same system:
If the steward is running in secure mode: steward -stop - secure
If the steward is not running in secure mode: steward -stop
In addition to the standard output, the steward can log to its own log files:
■
steward_A.log
■
steward-err_A.log
Use the tststew utility to verify that:
■
The steward process is running
■
The steward process is sending the right response
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Troubleshooting and recovery for VCS
VCS utilities
581
VCS utilities
VCS provides several utilities that address common issues, however, you must use
them with extreme caution. For best results, contact Symantec Technical Support
prior to using these utilities.
The getcomms utility
The getcomms utility collects and saves information related to the private network.
The information can be used by Technical Support to debug network-related issues.
To run the getcomms utility
◆
Run getcomms using the Perl executables provided with VCS.
C:\> "VRTS_HOME\VRTSPerl\bin\perl.exe"
getcomms.pl [-option]
The variable VRTS_HOME represents the Veritas installation directory, typically
C:\Program Files\VERITAS. If you chose the default installation paths, use
the following command to run getcomms:
C:\> "C:\Program
Files\VERITAS\VRTSPerl\bin\perl.exe" getcomms.pl
[-option]
getcomms options
You have several options to use to limit the diagnostic information to specific
components.
Table 20-2 shows the possible options for getcomms.
Table 20-2
getcomms options
Options
Action
-local
Retrieves and dumps information about the local system
-remote
Retrieves and dumps information about all live systems in
the cluster
-stuck
Prints the message queue
-d logdir
Dumps information at the directory specified by the variable
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Troubleshooting and recovery for VCS
VCS utilities
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Log location
The getcomms utility writes the output to the directory %temp%\commslog.timestamp
where %temp% is a system-defined environment variable and timestamp represents
the time the log was taken.
The hagetcf utility
The hagetcf utility retrieves and writes detailed diagnostic information about the
VCS configuration. The information can be used by Technical Support to debug
configuration-related issues.
To access hagetcf, type:
C:\> hagetcf [-option]
Running hagetcf displays output similar to the example below:
Veritas Cluster Server(TM) 6.0 for Windows 2008 Diagnostics
Copyright (C) 2012 Symantec Corporation All rights reserved.
Dumping output to:
C:\Program Files\Veritas\Cluster Server\hagetcf\<month><day>_<hh><mm>
Log location
By default, hagetcf writes the output to the directory %VCS_HOME%\hagetcf, where
%VCS_HOME% is the VCS installation directory, typically C:\Program
Files\VERITAS\Cluster Server\.
Options for the hagetcf utility
There are several options available with the hagetcf command to limit the diagnostic
information to specific components.
Table 20-3 shows the possible options.
Table 20-3
Options for the hagetcf command
Options
Action
-default
Dumps the default VCS logs that include outputs of the following
hagetcf command options:
-app, -sys, -hw, -ha, -log, -lock, -conf, -state, -islog, -trigger
Note: The output also includes information about MSDTC and the
VCS agent for MSDTC.
Troubleshooting and recovery for VCS
VCS utilities
Table 20-3
Options for the hagetcf command (continued)
Options
Action
-app
Dumps the application event log.
-sec
Dumps the security event log.
-sys
Dumps the system event log.
-hw
Dumps the hardware event log.
-allevt
Dumps all event logs.
-conf
Dumps the VCS config directory.
-log
Dumps the VCS log directory.
-ldf
Dumps the VCS ldf directory.
-lock
Dumps the lock directory.
-triggers
Dump all files from the VCS triggers directory.
-alldir
Dumps the config, log, ldf, and lock directories.
-ha
Dumps the output of the following commands:
hares -display -all
hagrp -display -all
hasys -display
getcomms.pl
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VCS utilities
Table 20-3
Options for the hagetcf command (continued)
Options
Action
-state
Dumps the following system state information:
■
Dr. Watson log
■
Drive signature information from the havol utility
■
■
Network information, including NICs, ipconfig, and network-related
registry entries
The VERITAS registry key
■
Output of the nbstat and the netstat commands
■
Licensing information
■
Disk and volume information
■
SCSI and Fibre configuration information
■
Server configuration information
■
Service and device state and configuration information
■
Processes running on the system
■
Information about the privileges of the current user
■
Information about products installed on the system
-haver
Dumps version information about all VCS binaries.
-nogetcomms
Excludes the output of the getcomms.pl command.
-sql
Dumps information about SQL Server and the VCS agent for SQL
Server.
-exch
Dumps information about Exchange Server and the VCS agent for
Exchange Server.
-iis
Dumps IIS information.
-notes
Dumps Notes information.
-orac
Dumps information about Oracle and the VCS agent for Oracle.
-msmq
Dumps information about MSMQ.
-allagents
Dumps information about all enterprise agents.
-vxlog
Dumps diagnostic information about the following:
■
Backup Exec
■
Veritas Enterprise Administrator
-islog
Dumps installation log.
-o <outdir>
Dumps hagetcf output to <outdir>.
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Table 20-3
Options for the hagetcf command (continued)
Options
Action
-? or -help
Displays the command's usage information.
Note: If you do not specify any options, the command retrieves diagnostic information
with the following options: -app, -sys, -ha, -log, -lock, -conf, -state,
-islog, -trigger. It also includes the Symantec High Availability Console logs,
if the Console components are installed on the cluster system.
The NICTest utility
The NICTest utility determines whether a NIC maintains its connection status in a
system-defined variable. The utility helps configuring NICs under VCS.
To perform the NIC test
1
At the command prompt, type:
C:\> NICTest adapter_macaddress
The variable adapter_macaddress represents the physical address of the
adapter. You can retrieve the MAC address using the ipconfig -all
command. The utility displays an error message if the entered MAC address
is invalid or if it cannot find the specified adapter.
2
Press Return.
3
Disconnect the NIC and press Return. The system prompts you to connect the
NIC.
4
Connect the NIC and press Return.
If the NIC does not maintain its connection status, the following message
appears:
NIC <adapter_macaddress> does not maintain the connection
status.
If the NIC maintains its connection status, the following message appears:
NIC <adapter_macaddress> maintains the connection status.
Please set the UseConnectionStatus attribute for this
resource to True.
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VCS utilities
The VCSRegUtil utility
If an application is run outside of VCS, registry changes are not logged to the shared
disk. VCS provides a utility, VCSRegUtil.exe, that marks the system on which
registry changes are made outside of the VCS environment.
If a system is marked by the VCSRegUtil utility, the agent detects registry changes
when VCS is started. The agent then logs changes to the shared disk. Therefore,
you must run the VCSRegUtil.exe utility whenever you run the clustered application
outside of VCS. For example, you must use it when issuing the command hastop
-all -force to take all resources offline and run the application outside the VCS
environment. The utility also unmarks a previously marked system. When the
resource is brought online on a system marked by this utility, the agent unmarks
the system.
Note: If a system is marked using VCSRegUtil.exe, and if the attribute RestoreLocally
is set to 1, the system marking overrides the RestoreLocally attribute and registry
changes are not applied to the system when it is brought online.
To mark a system, at the command prompt, type:
C:\> VCSRegUtil /RESOURCE=RegRepResourceName
/MARK
To unmark a system, at the command prompt, type:
C:\> VCSRegUtil /RESOURCE=RegRepResourceName
/UNMARK
The havol utility
The havol utility provides the following options:
■
-getdrive: Retrieves information about the disk and stores it in a file called
DriveInfo.txt in the same path from where you executed the command.
■
-scsitest: Reserves and releases disks. It helps troubleshoot issues related to
SCSI reservation.
Note: -scsitest option is not supported in an SFW environment.
C:\> havol -scsitest <options>
C:\> havol -getdrive [-details]
Using the -getdrive option
At the command prompt, type:
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VCS utilities
C:\> havol -getdrive
For detailed information about the disk, type:
C:\> havol -getdrive -details
The utility retrieves information about the disk and stores it in a file called DriveInfo.txt
in the same path from where you executed the command.
Sample file contents include:
Detailed Information about Fixed Disks with valid volumes
in the system: VCSW2K112J
Harddisk Number = 1
Harddisk Type = Basic Disk
Disk Signature = 130349684
Valid Partitions = 3
Access Test = SUCCESS
Partition Number = 3
Partition Type = IFS
Partition Bootable = NO
Partition Size = 400.06 MB
WINNT style Name = \device\Harddisk1\Partition3
Target Name = \Device\HarddiskVolume6
Device Name =
\\?\Volume{03074b0e-b4d7-11d6-b5a9-00d0b7471a1f}\
DriveLetter = Unassigned
DrivePath001 = F:\f1\
Partition Number = 2
Partition Type = IFS Partition
Bootable = NO
Partition Size = 400.06 MB
WINNT style Name = \device\Harddisk1\Partition2
Target Name = \Device\HarddiskVolume5
Device Name =
\\?\Volume{03074af7-b4d7-11d6-b5a9-00d0b7471a1f}\
DriveLetter = Unassigned
DrivePath001 = F:\f2\
Partition
Partition
Partition
Partition
Number = 1
Type = IFS
Bootable = NO
Size = 4.01 GB
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WINNT style Name = \device\Harddisk1\Partition1
Target Name = \Device\HarddiskVolume4
Device Name =
\\?\Volume{e587ddc7-8cee-11d6-b401-00d0b7471a1f}\
DriveLetter = F:
MountPoint001 = F:\f2\ ->
\\?\Volume{03074af7-b4d7-11d6-b5a9-00d0b7471a1f}\
MountPoint002 = F:\f1\ ->
\\?\Volume{03074b0e-b4d7-11d6-b5a9-00d0b7471a1f}\
Using the -scsitest option
At the command prompt, type:
C:\> havol -scsitest [/option]
The variable option represents additional parameters for the command.
See “The -scsitest command options” on page 588.
Warning: Reserving or releasing shared disks may cause the configured service
groups to fail over to another system.
Note: -scsitest option is not supported in an SFW environment.
Retrieving the disk number
Most scsitest options require the disk number. To list the disk numbers visible from
the system, type the following command:
C:\> havol -scsitest /L
Verify the disk signature to ensure you choose the correct disk number. If the
required disk number or signature is not listed, try rescanning the SCSI bus. Type:
C:\> havol -scsitest
/RESCAN
The -scsitest command options
You have several options with the scsitest command to limit the diagnostic
information to specific components.
Table 20-4 shows the basic options for the -scsitest command.
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Table 20-4
-scsitest command: basic options
Basic Options
Action
-ADDR:1
Gets the SCSI address of disk number 1.
-LISTDISKS or -L Lists all visible disks.
-REL:1
Releases disk number 1.
-RES:1
Reserves disk number 1.
-RESCAN
Rescans the SCSI bus.
-RESET:1
Resets the disk number 1 (in ioctl mode).
-SIG:1
Retrieves the signature of disk number 1.
Table 20-5 shows the advanced options for the -scscitest command.
Table 20-5
-scsitest command: advanced options
Advanced
Options
Action
-DISKCOUNT
Returns the total number of disks reserved persistently.
-PREL:1
Persistently releases disk number 1.
-PRES:1
Persistently reserves disk number 1.
-REMOVEALL
Removes all disks from persistent reservation.
-RESETPBI:1,0
Resets the port number 1 and path 0 by ioctl mode.
-RESETPBS:1,0
Resets the port number 1 and path 0 by SRB mode.
-STARTDRV
Starts the DiskRes driver.
-STOPDRV
Stops the DiskRes driver.
-VER
Retrieves the DiskRes.sys version.
The vmgetdrive utility
Use the VMGetDrive utility to retrieve information about the cluster disk groups and
configured volumes.
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Troubleshooting and recovery for VCS
VCS utilities
To retrieve information about the cluster disk groups using the VMGetDrive utility
1
At the command prompt, from the path %VCS_HOME%\bin, type:
%VCS_HOME%\bin> vmgetdrive
The system retrieves information about the volume and stores it in a file called
VMDriveInfo.txt in the same path from where you executed the command.
2
Open the file VMDriveInfo.txt using a text editor, and get the required
information. Sample file contents include:
There are 1 Imported Cluster Disk Groups
DiskGroup Name = VCS1
No of disks in diskgroup 'VCS1' = 2
Harddisk2
Harddisk3
No of volumes in diskgroup 'VCS1' = 2
Volume Name = Stripe1
Drive Letter = NONE
File System = NTFS
Mount Point = NONE
Volume Label =
Volume Type = STRIPED
Volume Name = Volume1
Drive Letter = NONE
File System = NTFS
Mount Point = NONE
Volume Label =
Volume Type = CONCATENATED
Configuring the VCS HAD Helper service manually
Use the HadHelper command to configure the VCS HAD Helper service manually.
Command syntax
Following is the command syntax for the HAadHelper command:
HADHelper /Install /User:<user_name> [/Password:<password>]
HADHelper /Uninstall
HADHelper /Configure /User:<user_name> [/Password:<password>]
HADHelper /ShowConfig
590
Troubleshooting and recovery for VCS
VCS utilities
■
If you do not specify a password for the /Install and /Configure options, the
command prompts for a password.
■
Specify the <user_name> as domain\user or user. If you do not append the
domain name, the command assumes the user belongs to the current domain.
■
Assign the privilege Add workstation to domain on the domain controller to
the user.
Command options
Note that the following command options are case insensitive.
Table 20-6 shows the possible options for the HadHelper command.
Table 20-6
HadHelper command options
Options
Action
/Install
Installs the HADHelper service, configures the user for the service,
assigns the required local security privileges to the user, and adds the
user to the local administrators group.
If the service already exists, the option configures the user for the
service.
/Uninstall
Uninstalls the service, removes the local security privileges for the
configured user, and removes the user from local administrators group.
Note: Stop the service before running the command to uninstall the
service.
/Configure
Changes the user for the service, assigns the required local security
privileges to the user, and adds the user to local administrators group.
The option also revokes the local security privileges of the previous
user and removes the user from local administrators group.
/ShowConfig
Displays the user name, user SID, and the local security privileges held
by the user.
591
Section
6
Appendixes
■
Appendix A. VCS user privileges—administration matrices
■
Appendix B. Cluster and system states
■
Appendix C. VCS attributes
■
Appendix D. Configuring LLT over UDP
■
Appendix E. Handling concurrency violation in any-to-any configurations
■
Appendix F. Accessibility and VCS
Appendix
A
VCS user
privileges—administration
matrices
This appendix includes the following topics:
■
About administration matrices
■
Administration matrices
About administration matrices
In general, users with Guest privileges can run the following command options:
-display, -state, and -value.
Users with privileges for Group Operator and Cluster Operator can execute the
following options: -online, -offline, and -switch.
Users with Group Administrator and Cluster Administrator privileges can run the
following options -add, -delete, and -modify.
See “About VCS user privileges and roles” on page 70.
Administration matrices
Review the matrices in the following topics to determine which command options
can be executed within a specific user role. Checkmarks denote the command and
option can be executed. A dash indicates they cannot.
VCS user privileges—administration matrices
Administration matrices
Agent Operations (haagent)
Table A-1 lists agent operations and required privileges.
Table A-1
User privileges for agent operations
Agent Operation Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
Start agent
–
–
–
✓
✓
Stop agent
–
–
–
✓
✓
Display info
✓
✓
✓
✓
✓
List agents
✓
✓
✓
✓
✓
Attribute Operations (haattr)
Table A-2 lists attribute operations and required privileges.
Table A-2
User privileges for attribute operations
Attribute
Operations
Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
Add
–
–
–
–
✓
Change default
value
–
–
–
–
✓
Delete
–
–
–
–
✓
Display
✓
✓
✓
✓
✓
Cluster Operations (haclus, haconf)
Table A-3 lists cluster operations and required privileges.
Table A-3
User privileges for cluster operations
Cluster
Operations
Cluster
Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
Display
✓
✓
✓
✓
✓
Modify
–
–
–
–
✓
Add
–
–
–
–
✓
594
VCS user privileges—administration matrices
Administration matrices
Table A-3
User privileges for cluster operations (continued)
Cluster
Operations
Cluster
Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
Delete
–
–
–
–
✓
Declare
–
–
–
✓
✓
View state or
status
✓
✓
✓
✓
✓
Update license
–
–
–
–
✓
Make configuration –
read-write
–
✓
–
✓
Save configuration –
–
✓
–
✓
Make configuration –
read-only
–
✓
–
✓
Service group operations (hagrp)
Table A-4 lists service group operations and required privileges.
Table A-4
User privileges for service group operations
Service Group
Operations
Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
Add and delete
–
–
–
–
✓
Link and unlink
–
–
–
–
✓
Clear
–
✓
✓
✓
✓
Bring online
–
✓
✓
✓
✓
Take offline
–
✓
✓
✓
✓
View state
✓
✓
✓
✓
✓
Switch
–
✓
✓
✓
✓
Freeze/unfreeze
–
✓
✓
✓
✓
Freeze/unfreeze
persistent
–
–
✓
–
✓
Enable
–
–
✓
–
✓
595
VCS user privileges—administration matrices
Administration matrices
Table A-4
User privileges for service group operations (continued)
Service Group
Operations
Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
Disable
–
–
✓
–
✓
Modify
–
–
✓
–
✓
Display
✓
✓
✓
✓
✓
View
dependencies
✓
✓
✓
✓
✓
View resources
✓
✓
✓
✓
✓
List
✓
✓
✓
✓
✓
Enable resources
–
–
✓
–
✓
Disable resources –
–
✓
–
✓
Flush
–
✓
✓
✓
✓
Autoenable
–
✓
✓
✓
✓
Ignore
–
✓
✓
✓
✓
Heartbeat operations (hahb)
Table A-5 lists heartbeat operations and required privileges.
Table A-5
User privileges for heartbeat operations
Heartbeat
Operations
Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
Add
–
–
–
–
✓
Delete
–
–
–
–
✓
Make local
–
–
–
–
✓
Make global
–
–
–
–
✓
Display
✓
✓
✓
✓
✓
View state
✓
✓
✓
✓
✓
List
✓
✓
✓
✓
✓
596
VCS user privileges—administration matrices
Administration matrices
Log operations (halog)
Table A-6 lists log operations and required privileges.
Table A-6
Log operations
User privileges for log operations
Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
Enable debug tags –
–
–
–
✓
Delete debug tags –
–
–
–
✓
Add messages to
log file
–
–
✓
–
✓
Display
✓
✓
✓
✓
✓
Display log file info ✓
✓
✓
✓
✓
Resource operations (hares)
Table A-7 lists resource operations and required privileges.
Table A-7
User privileges for resource operations
Resource
operations
Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
Add
–
–
✓
–
✓
Delete
–
–
✓
–
✓
Make attribute
local
–
–
✓
–
✓
Make attribute
global
–
–
✓
–
✓
Link and unlink
–
–
✓
–
✓
Clear
–
✓
✓
✓
✓
Bring online
–
✓
✓
✓
✓
Take offline
–
✓
✓
✓
✓
Modify
–
–
✓
–
✓
View state
✓
✓
✓
✓
✓
597
VCS user privileges—administration matrices
Administration matrices
Table A-7
User privileges for resource operations (continued)
Resource
operations
Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
Display
✓
✓
✓
✓
✓
View
dependencies
✓
✓
✓
✓
✓
List, Value
✓
✓
✓
✓
✓
Probe
–
✓
✓
✓
✓
Override attribute
–
–
✓
–
✓
Remove overrides –
–
✓
–
✓
Run an action
–
✓
✓
✓
✓
Refresh info
–
✓
✓
✓
✓
Flush info
–
✓
✓
✓
✓
System operations (hasys)
Table A-8 lists system operations and required privileges.
Table A-8
User privileges for system operations
System
operations
Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
Add
–
–
–
–
✓
Delete
–
–
–
–
✓
Freeze and
unfreeze
–
–
–
✓
✓
Freeze and
–
unfreeze persistent
–
–
–
✓
Freeze and
evacuate
–
–
–
–
✓
Display
✓
✓
✓
✓
✓
Start forcibly
–
–
–
–
✓
Modify
–
–
–
–
✓
598
VCS user privileges—administration matrices
Administration matrices
Table A-8
User privileges for system operations (continued)
System
operations
Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
View state
✓
✓
✓
✓
✓
List
✓
✓
✓
✓
✓
Update license
–
–
–
–
✓
Resource type operations (hatype)
Table A-9 lists resource type operations and required privileges.
Table A-9
User privileges for resource type operations
Resource type
operations
Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
Add
–
–
–
–
✓
Delete
–
–
–
–
✓
Display
✓
✓
✓
✓
✓
View resources
✓
✓
✓
✓
✓
Modify
–
–
–
–
✓
List
✓
✓
✓
✓
✓
User operations (hauser)
Table A-10 lists user operations and required privileges.
Table A-10
User privileges for user operations
User operations Guest
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
Add
–
–
–
–
✓
Delete
–
–
–
–
✓
599
VCS user privileges—administration matrices
Administration matrices
Table A-10
User privileges for user operations (continued)
User operations Guest
Update
✓
Group
Operator
Group
Admin.
Cluster
Operator
Cluster
Admin.
✓
✓
✓
✓
Note: If
Note: If
configuration configuration
is read/write is read/write
Note: If
configuration
is read/write
Display
✓
✓
✓
✓
✓
List
✓
✓
✓
✓
✓
Modify privileges
–
–
✓
–
✓
600
Appendix
B
Cluster and system states
This appendix includes the following topics:
■
Remote cluster states
■
System states
Remote cluster states
In global clusters, the "health" of the remote clusters is monitored and maintained
by the wide-area connector process. The connector process uses heartbeats, such
as Icmp, to monitor the state of remote clusters. The state is then communicated
to HAD, which then uses the information to take appropriate action when required.
For example, when a cluster is shut down gracefully, the connector transitions its
local cluster state to EXITING and notifies the remote clusters of the new state.
When the cluster exits and the remote connectors lose their TCP/IP connection to
it, each remote connector transitions their view of the cluster to EXITED.
To enable wide-area network heartbeats, the wide-area connector process must
be up and running. For wide-area connectors to connect to remote clusters, at least
one heartbeat to the specified cluster must report the state as ALIVE.
There are three hearbeat states for remote clusters: HBUNKNOWN, HBALIVE, and
HBDEAD.
See “Examples of system state transitions” on page 605.
Table B-1 provides a list of VCS remote cluster states and their descriptions.
Table B-1
VCS state definitions
State
Definition
INIT
The initial state of the cluster. This is the default state.
Cluster and system states
Remote cluster states
Table B-1
VCS state definitions (continued)
State
Definition
BUILD
The local cluster is receiving the initial snapshot from the remote cluster.
RUNNING
Indicates the remote cluster is running and connected to the local
cluster.
LOST_HB
The connector process on the local cluster is not receiving heartbeats
from the remote cluster
LOST_CONN
The connector process on the local cluster has lost the TCP/IP
connection to the remote cluster.
UNKNOWN
The connector process on the local cluster determines the remote
cluster is down, but another remote cluster sends a response indicating
otherwise.
FAULTED
The remote cluster is down.
EXITING
The remote cluster is exiting gracefully.
EXITED
The remote cluster exited gracefully.
INQUIRY
The connector process on the local cluster is querying other clusters
on which heartbeats were lost.
TRANSITIONING
The connector process on the remote cluster is failing over to another
node in the cluster.
Examples of cluster state transitions
Following are examples of cluster state transitions:
■
If a remote cluster joins the global cluster configuration, the other clusters in the
configuration transition their "view" of the remote cluster to the RUNNING state:
INIT -> BUILD -> RUNNING
■
If a cluster loses all heartbeats to a remote cluster in the RUNNING state,
inquiries are sent. If all inquiry responses indicate the remote cluster is actually
down, the cluster transitions the remote cluster state to FAULTED:
RUNNING -> LOST_HB -> INQUIRY -> FAULTED
■
If at least one response does not indicate the cluster is down, the cluster
transitions the remote cluster state to UNKNOWN:
RUNNING -> LOST_HB -> INQUIRY -> UNKNOWN
■
When the ClusterService service group, which maintains the connector process
as highly available, fails over to another system in the cluster, the remote clusters
602
Cluster and system states
System states
transition their view of that cluster to TRANSITIONING, then back to RUNNING
after the failover is successful:
RUNNING -> TRANSITIONING -> BUILD -> RUNNING
■
When a remote cluster in a RUNNING state is stopped (by taking the
ClusterService service group offline), the remote cluster transitions to EXITED:
RUNNING -> EXITING -> EXITED
System states
Whenever the VCS engine is running on a system, it is in one of the states described
in the table below. States indicate a system’s current mode of operation. When the
engine is started on a new system, it identifies the other systems available in the
cluster and their states of operation. If a cluster system is in the state of RUNNING,
the new system retrieves the configuration information from that system. Changes
made to the configuration while it is being retrieved are applied to the new system
before it enters the RUNNING state.
If no other systems are up and in the state of RUNNING or ADMIN_WAIT, and the
new system has a configuration that is not invalid, the engine transitions to the state
LOCAL_BUILD, and builds the configuration from disk. If the configuration is invalid,
the system transitions to the state of STALE_ADMIN_WAIT.
See “Examples of system state transitions” on page 605.
Table B-2 provides a list of VCS system states and their descriptions.
Table B-2
VCS system states
State
Definition
ADMIN_WAIT
The running configuration was lost. A system transitions into this state
for the following reasons:
■
■
CURRENT_
DISCOVER_WAIT
The last system in the RUNNING configuration leaves the cluster
before another system takes a snapshot of its configuration and
transitions to the RUNNING state.
A system in LOCAL_BUILD state tries to build the configuration
from disk and receives an unexpected error from hacf indicating
the configuration is invalid.
The system has joined the cluster and its configuration file is valid.
The system is waiting for information from other systems before it
determines how to transition to another state.
603
Cluster and system states
System states
Table B-2
State
VCS system states (continued)
Definition
CURRENT_PEER_ The system has a valid configuration file and another system is doing
WAIT
a build from disk (LOCAL_BUILD). When its peer finishes the build,
this system transitions to the state REMOTE_BUILD.
EXITING
The system is leaving the cluster.
EXITED
The system has left the cluster.
EXITING_FORCIBLY An hastop -force command has forced the system to leave the
cluster.
FAULTED
The system has left the cluster unexpectedly.
INITING
The system has joined the cluster. This is the initial state for all
systems.
LEAVING
The system is leaving the cluster gracefully. When the agents have
been stopped, and when the current configuration is written to disk,
the system transitions to EXITING.
LOCAL_BUILD
The system is building the running configuration from the disk
configuration.
REMOTE_BUILD
The system is building a running configuration that it obtained from a
peer in a RUNNING state.
RUNNING
The system is an active member of the cluster.
STALE_ADMIN_WAIT The system has an invalid configuration and there is no other system
in the state of RUNNING from which to retrieve a configuration. If a
system with a valid configuration is started, that system enters the
LOCAL_BUILD state.
Systems in STALE_ADMIN_WAIT transition to STALE_PEER_WAIT.
STALE_
DISCOVER_WAIT
The system has joined the cluster with an invalid configuration file. It
is waiting for information from any of its peers before determining how
to transition to another state.
STALE_PEER_WAIT The system has an invalid configuration file and another system is
doing a build from disk (LOCAL_BUILD). When its peer finishes the
build, this system transitions to the state REMOTE_BUILD.
UNKNOWN
The system has not joined the cluster because it does not have a
system entry in the configuration.
604
Cluster and system states
System states
Examples of system state transitions
Following are examples of system state transitions:
■
If VCS is started on a system, and if that system is the only one in the cluster
with a valid configuration, the system transitions to the RUNNING state:
INITING -> CURRENT_DISCOVER_WAIT -> LOCAL_BUILD -> RUNNING
■
If VCS is started on a system with a valid configuration file, and if at least one
other system is already in the RUNNING state, the new system transitions to
the RUNNING state:
INITING -> CURRENT_DISCOVER_WAIT -> REMOTE_BUILD -> RUNNING
■
If VCS is started on a system with an invalid configuration file, and if at least
one other system is already in the RUNNING state, the new system transitions
to the RUNNING state:
INITING -> STALE_DISCOVER_WAIT -> REMOTE_BUILD -> RUNNING
■
If VCS is started on a system with an invalid configuration file, and if all other
systems are in STALE_ADMIN_WAIT state, the system transitions to the
STALE_ADMIN_WAIT state as shown below. A system stays in this state until
another system with a valid configuration file is started.
INITING -> STALE_DISCOVER_WAIT -> STALE_ADMIN_WAIT
■
If VCS is started on a system with a valid configuration file, and if other systems
are in the ADMIN_WAIT state, the new system transitions to the ADMIN_WAIT
state.
INITING -> CURRENT_DISCOVER_WAIT -> ADMIN_WAIT
■
If VCS is started on a system with an invalid configuration file, and if other
systems are in the ADMIN_WAIT state, the new system transitions to the
ADMIN_WAIT state.
INITING -> STALE_DISCOVER_WAIT -> ADMIN_WAIT
■
When a system in RUNNING state is stopped with the hastop command, it
transitions to the EXITED state as shown below. During the LEAVING state,
any online system resources are taken offline. When all of the system’s resources
are taken offline and the agents are stopped, the system transitions to the
EXITING state, then EXITED.
RUNNING -> LEAVING -> EXITING -> EXITED
605
Appendix
C
VCS attributes
This appendix includes the following topics:
■
About attributes and their definitions
■
Resource attributes
■
Resource type attributes
■
Service group attributes
■
System attributes
■
Cluster attributes
■
Heartbeat attributes (for global clusters)
■
Remote cluster attributes
About attributes and their definitions
In addition to the attributes listed in this appendix, see the Veritas Cluster Server
Agent Developer’s Guide.
You can modify the values of attributes labelled user-defined from the command
line or graphical user interface, or by manually modifying the main.cf configuration
file. You can change the default values to better suit your environment and enhance
performance.
When changing the values of attributes, be aware that VCS attributes interact with
each other. After changing the value of an attribute, observe the cluster systems
to confirm that unexpected behavior does not impair performance.
The values of attributes labelled system use only are set by VCS and are read-only.
They contain important information about the state of the cluster.
VCS attributes
Resource attributes
The values labeled agent-defined are set by the corresponding agent and are also
read-only.
Attribute values are case-sensitive.
See “About VCS attributes” on page 60.
Resource attributes
Table C-1 lists resource attributes.
Table C-1
Resource attributes
Resource
attributes
Description
ArgListValues
List of arguments passed to the resource’s agent on each system.This attribute is
resource-specific and system-specific, meaning that the list of values passed to the agent depend
on which system and resource they are intended.
(agent-defined)
The number of values in the ArgListValues should not exceed 425. This requirement becomes
a consideration if an attribute in the ArgList is a keylist, a vector, or an association. Such type
of non-scalar attributes can typically take any number of values, and when they appear in the
ArgList, the agent has to compute ArgListValues from the value of such attributes. If the non-scalar
attribute contains many values, it will increase the size of ArgListValues. Hence when developing
an agent, this consideration should be kept in mind when adding a non-scalar attribute in the
ArgList. Users of the agent need to be notified that the attribute should not be configured to be
so large that it pushes that number of values in the ArgListValues attribute to be more than 425.
■
Type and dimension: string-vector
■
Default: non-applicable.
607
VCS attributes
Resource attributes
Table C-1
Resource attributes (continued)
Resource
attributes
Description
AutoStart
Indicates if a resource should be brought online as part of a service group online, or if it needs
the hares -online command.
(user-defined)
For example, you have two resources, R1 and R2. R1 and R2 are in group G1. R1 has an
AutoStart value of 0, R2 has an AutoStart value of 1.
In this case, you see the following effects:
# hagrp -online G1 -sys sys1
Brings only R2 to an ONLINE state. The group state is ONLINE and not a PARTIAL state. R1
remains OFFLINE.
# hares -online R1 -sys sys1
Brings R1 online, the group state is ONLINE.
# hares -offline R2 -sys sys1
Brings R2 offline, the group state is PARTIAL.
Resources with a value of zero for AutoStart, contribute to the group's state only in their ONLINE
state and not for their OFFLINE state.
■
Type and dimension: boolean-scalar
■
Default: 1
ComputeStats
Indicates to agent framework whether or not to calculate the resource’s monitor statistics.
(user-defined)
■
Type and dimension: boolean-scalar
■
Default: 0
ConfidenceLevel
(agent-defined)
Critical
(user-defined)
Indicates the level of confidence in an online resource. Values range from 0–100. Note that
some VCS agents may not take advantage of this attribute and may always set it to 0. Set the
level to 100 if the attribute is not used.
■
Type and dimension: integer-scalar
■
Default: 0
Indicates whether a fault of this resource should trigger a failover of the entire group or not. If
Critical is 0 and no parent above has Critical = 1, then the resource fault will not cause group
failover.
■
Type and dimension: boolean-scalar
■
Default: 1
608
VCS attributes
Resource attributes
Table C-1
Resource attributes (continued)
Resource
attributes
Description
Enabled
Indicates agents monitor the resource.
(user-defined)
If a resource is created dynamically while VCS is running, you must enable the resource before
VCS monitors it. For more information on how to add or enable resources, see the chapters on
administering VCS from the command line and graphical user interfaces.
When Enabled is set to 0, it implies a disabled resource.
Flags
(system use only)
■
Type and dimension: boolean-scalar
■
Default: If you specify the resource in main.cf prior to starting VCS, the default value for this
attribute is 1, otherwise it is 0.
Provides additional information for the state of a resource. Primarily this attribute raises flags
pertaining to the resource. Values:
NORMAL—Standard working order.
RESTARTING —The agent is attempting to restart the resource because the resource was
detected as offline in latest monitor cycle unexpectedly. See RestartLimit attribute for more
information.
STATE UNKNOWN—The latest monitor call by the agent could not determine if the resource
was online or offline.
MONITOR TIMEDOUT —The latest monitor call by the agent was terminated because it exceeded
the maximum time specified by the static attribute MonitorTimeout.
UNABLE TO OFFLINE—The agent attempted to offline the resource but the resource did not
go offline. This flag is also set when a resource faults and the clean function completes
successfully, but the subsequent monitor hangs or is unable to determine resource status.
■
Type and dimension: integer-scalar
■
Default: Not applicable.
Group
String name of the service group to which the resource belongs.
(system use only)
■
Type and dimension: string-scalar
■
Default: Not applicable.
609
VCS attributes
Resource attributes
Table C-1
Resource attributes (continued)
Resource
attributes
Description
IState
The internal state of a resource. In addition to the State attribute, this attribute shows to which
state the resource is transitioning. Values:
(system use only)
NOT WAITING—Resource is not in transition.
WAITING TO GO ONLINE—Agent notified to bring the resource online but procedure not yet
complete.
WAITING FOR CHILDREN ONLINE—Resource to be brought online, but resource depends on
at least one offline resource. Resource transitions to waiting to go online when all children are
online.
WAITING TO GO OFFLINE—Agent notified to take the resource offline but procedure not yet
complete.
WAITING TO GO OFFLINE (propagate)—Same as above, but when completed the resource’s
children will also be offline.
WAITING TO GO ONLINE (reverse)—Resource waiting to be brought online, but when it is
online it attempts to go offline. Typically this is the result of issuing an offline command while
resource was waiting to go online.
WAITING TO GO OFFLINE (path) - Agent notified to take the resource offline but procedure
not yet complete. When the procedure completes, the resource’s children which are a member
of the path in the dependency tree will also be offline.
WAITING TO GO OFFLINE (reverse) - Resource waiting to be brought offline, but when it is
offline it attempts to go online. Typically this is the result of issuing an online command while
resource was waiting to go offline.
WAITING TO GO ONLINE (reverse/path) - Resource waiting to be brought online, but when
online it is brought offline. Resource transitions to WAITING TO GO OFFLINE (path). Typically
this is the result of fault of a child resource while resource was waiting to go online.
WAITING FOR PARENT OFFLINE – Resource waiting for parent resource to go offline. When
parent is offline the resource is brought offline.
Note: Although this attribute accepts integer types, the command line indicates the text
representations.
WAITING TO GO ONLINE (reverse/propagate)—Same as above, but resource propagates the
offline operation.
■
Type and dimension: integer-scalar
■
Default: 1
not waiting
610
VCS attributes
Resource attributes
Table C-1
Resource attributes (continued)
Resource
attributes
Description
LastOnline
Indicates the system name on which the resource was last online. This attribute is set by VCS.
(system use only)
■
Type and dimension: string-scalar
■
Default: Not applicable
MonitorOnly
(system use only)
Indicates if the resource can be brought online or taken offline. If set to 0, resource can be
brought online or taken offline. If set to 1, resource can only be monitored.
Note: This attribute can only be affected by the command hagrp -freeze.
MonitorTimeStats
(system use only)
■
Type and dimension: boolean-scalar
■
Default: 0
Valid keys are Average and TS. Average is the average time taken by the monitor function over
the last Frequency number of monitor cycles. TS is the timestamp indicating when the engine
updated the resource’s Average value.
■
Type and dimension: string-association
■
Default: Average = 0
TS = ""
Name
Contains the actual name of the resource.
(system use only)
■
Type and dimension: string-scalar
■
Default: Not applicable.
Path
(system use only)
Probed
(system use only)
Set to 1 to identify a resource as a member of a path in the dependency tree to be taken offline
on a specific system after a resource faults.
■
Type and dimension: boolean-scalar
■
Default: 0
Indicates whether the state of the resource has been determined by the agent by running the
monitor function.
■
Type and dimension: boolean-scalar
■
Default: 0
611
VCS attributes
Resource attributes
Table C-1
Resource attributes (continued)
Resource
attributes
Description
ResourceInfo
This attribute has three predefined keys: State: values are Valid, Invalid, or Stale. Msg: output
of the info agent function of the resource on stdout by the agent framework. TS: timestamp
indicating when the ResourceInfo attribute was updated by the agent framework
(system use only)
ResourceOwner
(user-defined)
■
Type and dimension: string-association
■
Default:
State = Valid
Msg = ""
TS = ""
This attribute is used for VCS email notification and logging. VCS sends email notification to the
person that is designated in this attribute when events occur that are related to the resource.
Note that while VCS logs most events, not all events trigger notifications. VCS also logs the
owner name when certain events occur.
Make sure to set the severity level at which you want notifications to be sent to ResourceOwner
or to at least one recipient defined in the SmtpRecipients attribute of the NotifierMngr agent.
■
Type and dimension: string-scalar
■
Default: ""
■
Example: "jdoe@example.com"
ResourceRecipients This attribute is used for VCS email notification. VCS sends email notification to persons
designated in this attribute when events related to the resource occur and when the event's
(user-defined)
severity level is equal to or greater than the level specified in the attribute.
Make sure to set the severity level at which you want notifications to be sent to
ResourceRecipients or to at least one recipient defined in the SmtpRecipients attribute of the
NotifierMngr agent.
Signaled
(system use only)
Start
(system use only)
■
Type and dimension: string-association
■
email id: The e-mail address of the person registered as a recipient for notification.
severity: The minimum level of severity at which notifications must be sent.
Indicates whether a resource has been traversed. Used when bringing a service group online
or taking it offline.
■
Type and dimension: integer-association
■
Default: Not applicable.
Indicates whether a resource was started (the process of bringing it online was initiated) on a
system.
■
Type and dimension: integer -scalar
■
Default: 0
612
VCS attributes
Resource attributes
Table C-1
Resource attributes (continued)
Resource
attributes
Description
State
Resource state displays the state of the resource and the flags associated with the resource.
(Flags are also captured by the Flags attribute.) This attribute and Flags present a comprehensive
view of the resource’s current state. Values:
(system use only)
ONLINE
OFFLINE
FAULTED
OFFLINE|MONITOR TIMEDOUT
OFFLINE|STATE UNKNOWN
OFFLINE|ADMIN WAIT
ONLINE|RESTARTING
ONLINE|MONITOR TIMEDOUT
ONLINE|STATE UNKNOWN
ONLINE|UNABLE TO OFFLINE
ONLINE|ADMIN WAIT
FAULTED|MONITOR TIMEDOUT
FAULTED|STATE UNKNOWN
A FAULTED resource is physically offline, though unintentionally.
Note: Although this attribute accepts integer types, the command line indicates the text
representations.
Type and dimension: integer -scalar
Default: 0
TriggerEvent
A flag that turns Events on or off.
(user-defined)
■
Type and dimension: boolean-scalar
■
Default: 0
613
VCS attributes
Resource attributes
Table C-1
Resource attributes (continued)
Resource
attributes
Description
TriggerPath
Enables you to customize the trigger path.
(user-defined)
■
Type and dimension: string-scalar
■
Default: ""
If a trigger is enabled but the trigger path at the service group level and at the resource level is
"" (default), VCS invokes the trigger from the $VCS_HOME/bin/triggers directory.
The TriggerPath value is case-sensitive. VCS does not trim the leading spaces or trailing spaces
in the Trigger Path value. If the path contains leading spaces or trailing spaces, the trigger might
fail to get executed. The path that you specify is relative to $VCS_HOME and the trigger path
defined for the service group.
Specify the path in the following format:
ServiceGroupTriggerPath/Resource/Trigger
If TriggerPath for service group sg1 is mytriggers/sg1 and TriggerPath for resource res1 is "",
you must store the trigger script in the $VCS_HOME/mytriggers/sg1/res1 directory. For example,
store the resstatechange trigger script in the $VCS_HOME/mytriggers/sg1/res1 directory. Yon
can manage triggers for all resources for a service group more easily.
If TriggerPath for resource res1 is mytriggers/sg1/vip1 in the preceding example, you must store
the trigger script in the $VCS_HOME/mytriggers/sg1/vip1 directory. For example, store the
resstatechange trigger script in the $VCS_HOME/mytriggers/sg1/vip1 directory.
Modification of TriggerPath value at the resource level does not change the TriggerPath value
at the service group level. Likewise, modification of TriggerPath value at the service group level
does not change the TriggerPath value at the resource level.
TriggerResRestart
Determines whether or not to invoke the resrestart trigger if resource restarts.
(user-defined)
See “About the resrestart event trigger” on page 457.
If this attribute is enabled at the group level, the resrestart trigger is invoked irrespective of the
value of this attribute at the resource level.
See “Service group attributes” on page 626.
■
Type and dimension: boolean-scalar
■
Default: 0 (disabled)
614
VCS attributes
Resource type attributes
Table C-1
Resource attributes (continued)
Resource
attributes
Description
TriggerResState
Change
Determines whether or not to invoke the resstatechange trigger if the resource changes state.
(user-defined)
See “About the resstatechange event trigger” on page 457.
If this attribute is enabled at the group level, then the resstatechange trigger is invoked irrespective
of the value of this attribute at the resource level.
See “Service group attributes” on page 626.
■
Type and dimension: boolean-scalar
■
Default: 0 (disabled)
TriggersEnabled
Determines if a specific trigger is enabled or not.
(user-defined)
Triggers are disabled by default. You can enable specific triggers on all nodes or only on selected
nodes. Valid values are RESFAULT, RESNOTOFF, RESSTATECHANGE, RESRESTART, and
RESADMINWAIT.
To enable triggers on a specific node, add trigger keys in the following format:
TriggersEnabled@node1 = {RESADMINWAIT, RESNOTOFF}
The resadminwait trigger and resnotoff trigger are enabled on node1.
To enable triggers on all nodes in the cluster, add trigger keys in the following format:
TriggersEnabled = {RESADMINWAIT, RESNOTOFF}
The resadminwait trigger and resnotoff trigger are enabled on all nodes.
■
Type and dimension: string-keylist
■
Default: {}
Resource type attributes
You can override some static attributes for resource types.
See “Overriding resource type static attributes” on page 159.
For more information on any attribute listed below, see the chapter on setting agent
parameters in the Veritas Cluster Server Agent Developer’s Guide.
Table C-2 lists the resource type attributes.
Table C-2
Resource type attributes
Description
Resource type attributes
615
VCS attributes
Resource type attributes
Table C-2
Resource type attributes (continued)
Resource type attributes
Description
AdvDbg
Enables activation of advanced debugging:
(user-defined)
■
Type and dimension: string-keylist
■
Default: Not applicable
For information about the AdvDbg attribute, see the Veritas Cluster Server Agent
Developer's Guide.
AgentClass
Indicates the scheduling class for the VCS agent process.
(user-defined)
Use only one of the following sets of attributes to configure scheduling class and priority
for VCS:
■
AgentClass, AgentPriority, ScriptClass, and ScriptPriority
Or
OnlineClass, OnlinePriority, EPClass, and EPPriority
■
Type and dimension: string-scalar
■
Default: TS
■
AgentDirectory
Complete path of the directory in which the agent binary and scripts are located.
(user-defined)
If none of the above directories exist, the agent does not start.
Use this attribute in conjunction with the AgentFile attribute to specify a different location
or different binary for the agent.
■
Type and dimension: string-scalar
■
Default = ""
AgentFailedOn
A list of systems on which the agent for the resource type has failed.
(system use only)
■
Type and dimension: string-keylist
■
Default: Not applicable.
AgentFile
(user-defined)
Complete name and path of the binary for an agent. If you do not specify a value for
this attribute, VCS uses the agent binary at the path defined by the AgentDirectory
attribute.
■
Type and dimension: string-scalar
■
Default = ""
616
VCS attributes
Resource type attributes
Table C-2
Resource type attributes (continued)
Resource type attributes
Description
AgentPriority
Indicates the priority in which the agent process runs.
(user-defined)
Use only one of the following sets of attributes to configure scheduling class and priority
for VCS:
■
■
AgentClass, AgentPriority, ScriptClass, and ScriptPriority
Or
OnlineClass, OnlinePriority, EPClass, and EPPriority
Type and dimension: string-scalar
Default: 0
AgentReplyTimeout
(user-defined)
AgentStartTimeout
(user-defined)
AlertOnMonitorTimeouts
(user-defined)
Note: This attribute can be
overridden.
The number of seconds the engine waits to receive a heartbeat from the agent before
restarting the agent.
■
Type and dimension: integer-scalar
■
Default: 130 seconds
The number of seconds after starting the agent that the engine waits for the initial agent
"handshake" before restarting the agent.
■
Type and dimension: integer-scalar
■
Default: 60 seconds
When a monitor times out as many times as the value or a multiple of the value specified
by this attribute, then VCS sends an SNMP notification to the user. If this attribute is
set to a value, say N, then after sending the notification at the first monitor timeout,
VCS also sends an SNMP notification at each N-consecutive monitor timeout including
the first monitor timeout for the second-time notification.
When AlertOnMonitorTimeouts is set to 0, VCS will send an SNMP notification to the
user only for the first monitor timeout; VCS will not send further notifications to the user
for subsequent monitor timeouts until the monitor returns a success.
The AlertOnMonitorTimeouts attribute can be used in conjunction with the
FaultOnMonitorTimeouts attribute to control the behavior of resources of a group
configured under VCS in case of monitor timeouts. When FaultOnMonitorTimeouts is
set to 0 and AlertOnMonitorTimeouts is set to some value for all resources of a service
group, then VCS will not perform any action on monitor timeouts for resources
configured under that service group, but will only send notifications at the frequency
set in the AlertOnMonitorTimeouts attribute.
■
Type and dimension: integer-scalar
■
Default: 0
617
VCS attributes
Resource type attributes
Table C-2
Resource type attributes (continued)
Resource type attributes
Description
ArgList
An ordered list of attributes whose values are passed to the open, close, online, offline,
monitor, clean, info, and action functions.
(user-defined)
CleanRetryLimit
(user-defined)
■
Type and dimension: string-vector
■
Default: Not applicable.
Number of times to retry the clean function before moving a resource to ADMIN_WAIT
state. If set to 0, clean is re-tried indefinitely.
The valid values of this attribute are in the range of 0-1024.
ConfInterval
(user-defined)
■
Type and dimension: integer-scalar
■
Default: 0
When a resource has remained online for the specified time (in seconds), previous
faults and restart attempts are ignored by the agent. (See ToleranceLimit and
RestartLimit attributes for details.)
Note: This attribute can be
overridden.
EPClass
(user-defined)
■
Type and dimension: integer-scalar
■
Default: 600 seconds
Enables you to control the scheduling class for the agent functions (entry points) other
than the online entry point whether the entry point is in C or scripts.
The following values are valid for this attribute:
■
RT (Real Time)
■
TS (Time Sharing)
■
-1—indicates that VCS does not use this attribute to control the scheduling class
of entry points.
Use only one of the following sets of attributes to configure scheduling class and priority
for VCS:
■
AgentClass, AgentPriority, ScriptClass, and ScriptPriority
Or
OnlineClass, OnlinePriority, EPClass, and EPPriority
■
Type and dimension: string-scalar
■
Default: -1
■
618
VCS attributes
Resource type attributes
Table C-2
Resource type attributes (continued)
Resource type attributes
Description
EPPriority
Enables you to control the scheduling priority for the agent functions (entry points)
other than the online entry point. The attribute controls the agent function priority
whether the entry point is in C or scripts.
(user-defined)
The following values are valid for this attribute:
■
■
■
0—indicates the default priority value for the configured scheduling class as given
by the EPClass attribute for the operating system.
Greater than 0—indicates a value greater than the default priority for the operating
system. Symantec recommends a value of greater than 0 for this attribute. A system
that has a higher load requires a greater value.
-1—indicates that VCS does not use this attribute to control the scheduling priority
of entry points.
Use only one of the following sets of attributes to configure scheduling class and priority
for VCS:
■
AgentClass, AgentPriority, ScriptClass, and ScriptPriority
Or
OnlineClass, OnlinePriority, EPClass, and EPPriority
■
Type and dimension: string-scalar
■
Default: -1
■
ExternalStateChange
(user-defined)
Defines how VCS handles service group state when resources are intentionally brought
online or taken offline outside of VCS control.
Note: This attribute can be
The attribute can take the following values:
overridden.
OnlineGroup: If the configured application is started outside of VCS control, VCS
brings the corresponding service group online.
OfflineGroup: If the configured application is stopped outside of VCS control, VCS
takes the corresponding service group offline.
OfflineHold: If a configured application is stopped outside of VCS control, VCS sets
the state of the corresponding VCS resource as offline. VCS does not take any parent
resources or the service group offline.
OfflineHold and OfflineGroup are mutually exclusive.
619
VCS attributes
Resource type attributes
Table C-2
Resource type attributes (continued)
Resource type attributes
Description
FaultOnMonitorTimeouts
When a monitor times out as many times as the value specified, the corresponding
resource is brought down by calling the clean function. The resource is then marked
FAULTED, or it is restarted, depending on the value set in the RestartLimit attribute.
(user-defined)
Note: This attribute can be
overridden.
FaultPropagation
(user-defined)
Note: This attribute can be
overridden.
FireDrill
(user-defined)
InfoInterval
(user-defined)
When FaultOnMonitorTimeouts is set to 0, monitor failures are not considered indicative
of a resource fault. A low value may lead to spurious resource faults, especially on
heavily loaded systems.
■
Type and dimension: integer-scalar
■
Default: 4
Specifies if VCS should propagate the fault up to parent resources and take the entire
service group offline when a resource faults.
The value 1 indicates that when a resource faults, VCS fails over the service group, if
the group’s AutoFailOver attribute is set to 1. If The value 0 indicates that when a
resource faults, VCS does not take other resources offline, regardless of the value of
the Critical attribute. The service group does not fail over on resource fault.
■
Type and dimension: boolean-scalar
■
Default: 1
Specifies whether or not fire drill is enabled for resource type. If set to 1, fire drill is
enabled. If set to 0, it is disabled.
■
Type and dimension: boolean-scalar
■
Default: 0
Duration (in seconds) after which the info function is invoked by the agent framework
for ONLINE resources of the particular resource type.
If set to 0, the agent framework does not periodically invoke the info function. To
manually invoke the info function, use the command hares -refreshinfo. If the value
you designate is 30, for example, the function is invoked every 30 seconds for all
ONLINE resources of the particular resource type.
■
Type and dimension: integer-scalar
■
Default: 0
620
VCS attributes
Resource type attributes
Table C-2
Resource type attributes (continued)
Resource type attributes
Description
IntentionalOffline
Defines how VCS reacts when a configured application is intentionally stopped outside
of VCS control.
(user-defined)
Add this attribute for agents that support detection of an intentional offline outside of
VCS control. Note that the intentional offline feature is available for agents registered
as V51 or later.
The value 0 instructs the agent to register a fault and initiate the failover of a service
group when the supported resource is taken offline outside of VCS control.
The value 1 instructs VCS to take the resource offline when the corresponding
application is stopped outside of VCS control.
LogDbg
(user-defined)
LogFileSize
(user-defined)
MonitorInterval
(user-defined)
Note: This attribute can be
overridden.
■
Type and dimension: boolean-scalar
■
Default: 0
Indicates the debug severities enabled for the resource type or agent framework. Debug
severities used by the agent functions are in the range of DBG_1–DBG_21. The debug
messages from the agent framework are logged with the severities DBG_AGINFO,
DBG_AGDEBUG and DBG_AGTRACE, representing the least to most verbose.
■
Type and dimension: string-keylist
■
Default: {} (none)
Specifies the size (in bytes) of the agent log file. Minimum value is 64 KB. Maximum
value is 134217728 bytes (128MB).
■
Type and dimension: integer-scalar
■
Default: 33554432 (32MB)
Duration (in seconds) between two consecutive monitor calls for an ONLINE or
transitioning resource.
A low value may impact performance if many resources of the same type exist. A high
value may delay detection of a faulted resource.
■
Type and dimension: integer-scalar
■
Default: 60 seconds
621
VCS attributes
Resource type attributes
Table C-2
Resource type attributes (continued)
Resource type attributes
Description
MonitorStatsParam
Stores the required parameter values for calculating monitor time statistics.
(user-defined)
static str MonitorStatsParam = {Frequency = 10,
ExpectedValue = 3000, ValueThreshold = 100,
AvgThreshold = 40}
Frequency: The number of monitor cycles after which the average monitor cycle time
should be computed and sent to the engine. If configured, the value for this attribute
must be between 1 and 30. The value 0 indicates that the monitor cycle ti me should
not be computed. Default=0.
ExpectedValue: The expected monitor time in milliseconds for all resources of this
type. Default=100.
ValueThreshold: The acceptable percentage difference between the expected monitor
cycle time (ExpectedValue) and the actual monitor cycle time. Default=100.
AvgThreshold: The acceptable percentage difference between the benchmark average
and the moving average of monitor cycle times. Default=40.
NumThreads
(user-defined)
■
Type and dimension: integer-association
■
Default: Different value for each parameter.
Number of threads used within the agent process for managing resources. This number
does not include threads used for other internal purposes.
If the number of resources being managed by the agent is less than or equal to the
NumThreads value, only that many number of threads are created in the agent. Addition
of more resources does not create more service threads. Similarly deletion of resources
causes service threads to exit. Thus, setting NumThreads to 1 forces the agent to just
use 1 service thread no matter what the resource count is. The agent framework limits
the value of this attribute to 30.
OfflineMonitorInterval
(user-defined)
■
Type and dimension: integer-scalar
■
Default: 10
Duration (in seconds) between two consecutive monitor calls for an OFFLINE resource.
If set to 0, OFFLINE resources are not monitored.
Note: This attribute can be
■
Type and dimension: integer-scalar
overridden.
■
Default: 300 seconds
622
VCS attributes
Resource type attributes
Table C-2
Resource type attributes (continued)
Resource type attributes
Description
OfflineWaitLimit
Number of monitor intervals to wait for the resource to go offline after completing the
offline procedure. Increase the value of this attribute if the resource is likely to take a
longer time to go offline.
(user-defined)
Note: This attribute can be
overridden.
OnlineClass
Probes fired manually are counted when OfflineWaitLimit is set and the resource is
waiting to go offline. For example, say the OfflineWaitLimit of a resource is set to 5 and
the MonitorInterval is set to 60. The resource waits for a maximum of five monitor
intervals (five times 60), and if all five monitors within OfflineWaitLimit report the resource
as online, it calls the clean agent function. If the user fires a probe, the resource waits
for four monitor intervals (four times 60), and if the fourth monitor does not report the
state as offline, it calls the clean agent function. If the user fires another probe, one
more monitor cycle is consumed and the resource waits for three monitor intervals
(three times 60), and if the third monitor does not report the state as offline, it calls the
clean agent function.
■
Type and dimension: integer-scalar
■
Default: 0
Enables you to control the scheduling class for the online agent function (entry point).
This attribute controls the class whether the entry point is in C or scripts.
The following values are valid for this attribute:
■
RT (Real Time)
■
TS (Time Sharing)
■
-1—indicates that VCS does not use this attribute to control the scheduling class
of entry points.
Use only one of the following sets of attributes to configure scheduling class and priority
for VCS:
■
AgentClass, AgentPriority, ScriptClass, and ScriptPriority
Or
OnlineClass, OnlinePriority, EPClass, and EPPriority
■
Type and dimension: string-scalar
■
Default: -1
■
623
VCS attributes
Resource type attributes
Table C-2
Resource type attributes (continued)
Resource type attributes
Description
OnlinePriority
Enables you to control the scheduling priority for the online agent function (entry point).
This attribute controls the priority whether the entry point is in C or scripts.
The following values are valid for this attribute:
■
■
■
0—indicates the default priority value for the configured scheduling class as given
by the OnlineClass for the operating system.
Symantec recommends that you set the value of the OnlinePriority attribute to 0.
Greater than 0—indicates a value greater than the default priority for the operating
system.
-1—indicates that VCS does not use this attribute to control the scheduling priority
of entry points.
Use only one of the following sets of attributes to configure scheduling class and priority
for VCS:
■
AgentClass, AgentPriority, ScriptClass, and ScriptPriority
Or
OnlineClass, OnlinePriority, EPClass, and EPPriority
■
Type and dimension: string-scalar
■
Default: -1
■
OnlineRetryLimit
(user-defined)
Number of times to retry the online operation if the attempt to online a resource is
unsuccessful. This parameter is meaningful only if the clean operation is implemented.
Note: This attribute can be
■
Type and dimension: integer-scalar
overridden.
■
Default: 0
OnlineWaitLimit
Number of monitor intervals to wait for the resource to come online after completing
the online procedure. Increase the value of this attribute if the resource is likely to take
a longer time to come online.
(user-defined)
Note: This attribute can be
overridden.
Each probe command fired from the user is considered as one monitor interval. For
example, say the OnlineWaitLimit of a resource is set to 5. This means that the resource
will be moved to a faulted state after five monitor intervals. If the user fires a probe,
then the resource will be faulted after four monitor cycles, if the fourth monitor does
not report the state as ONLINE. If the user again fires a probe, then one more monitor
cycle is consumed and the resource will be faulted if the third monitor does not report
the state as ONLINE.
■
Type and dimension: integer-scalar
■
Default: 2
624
VCS attributes
Resource type attributes
Table C-2
Resource type attributes (continued)
Resource type attributes
Description
Operations
Indicates valid operations for resources of the resource type. Values are OnOnly (can
online only), OnOff (can online and offline), None (cannot online or offline).
(user-defined)
RestartLimit
(user-defined)
■
Type and dimension: string-scalar
■
Default: OnOff
Number of times to retry bringing a resource online when it is taken offline unexpectedly
and before VCS declares it FAULTED.
Note: This attribute can be
■
Type and dimension: integer-scalar
overridden.
■
Default: 0
ScriptClass
Indicates the scheduling class of the script processes (for example, online) created by
the agent.
(user-defined)
Use only one of the following sets of attributes to configure scheduling class and priority
for VCS:
■
AgentClass, AgentPriority, ScriptClass, and ScriptPriority
Or
OnlineClass, OnlinePriority, EPClass, and EPPriority
■
Type and dimension: string-scalar
■
Default: -1
■
Type and dimension: string-scalar
■
Default: TS
■
ScriptPriority
Indicates the priority of the script processes created by the agent.
(user-defined)
Use only one of the following sets of attributes to configure scheduling class and priority
for VCS:
■
AgentClass, AgentPriority, ScriptClass, and ScriptPriority
Or
OnlineClass, OnlinePriority, EPClass, and EPPriority
■
Type and dimension: string-scalar
■
Default: 0
■
SourceFile
File from which the configuration is read. Do not configure this attribute in main.cf.
(user-defined)
Make sure the path exists on all nodes before running a command that configures this
attribute.
■
Type and dimension: string-scalar
■
Default: .\types.cf
625
VCS attributes
Service group attributes
Table C-2
Resource type attributes (continued)
Resource type attributes
Description
SupportedActions
Valid action tokens for the resource type.
(user-defined)
■
Type and dimension: string-vector
■
Default: {}
ToleranceLimit
After a resource goes online, the number of times the monitor function should return
OFFLINE before declaring the resource FAULTED.
(user-defined)
Note: This attribute can be
overridden.
TypeOwner
(user-defined)
A large value could delay detection of a genuinely faulted resource.
■
Type and dimension: integer-scalar
■
Default: 0
This attribute is used for VCS notification. VCS sends notifications to persons designated
in this attribute when an event occurs related to the agent's resource type. If the agent
of that type faults or restarts, VCS send notification to the TypeOwner. Note that while
VCS logs most events, not all events trigger notifications.
Make sure to set the severity level at which you want notifications to be sent to
TypeOwner or to at least one recipient defined in the SmtpRecipients attribute of the
NotifierMngr agent.
TypeRecipients
(user-defined)
■
Type and dimension: string-scalar
■
Default: ""
■
Example: "jdoe@example.com"
This attribute is used for VCS email notification. VCS sends email notification to persons
designated in this attribute when events related to the agent's resource type occur and
when the event's severity level is equal to or greater than the level specified in the
attribute.
Make sure to set the severity level at which you want notifications to be sent to
TypeRecipients or to at least one recipient defined in the SmtpRecipients attribute of
the NotifierMngr agent.
■
Type and dimension: string-association
■
email id: The e-mail address of the person registered as a recipient for notification.
severity: The minimum level of severity at which notifications must be sent.
Service group attributes
Table C-3 lists the service group attributes.
626
VCS attributes
Service group attributes
Table C-3
Service group attributes
Service Group
Attributes
Definition
ActiveCount
Number of resources in a service group that are active (online or
waiting to go online). When the number drops to zero, the service
group is considered offline.
(system use only)
AdministratorGroups
(user-defined)
■
Type and dimension: integer-scalar
■
Default: Not applicable.
List of operating system user account groups that have administrative
privileges on the service group.
This attribute applies to clusters running in secure mode.
■
Type and dimension: string-keylist
■
Default: {} (none)
Administrators
List of VCS users with privileges to administer the group.
(user-defined)
Note: A Group Administrator can perform all operations related to
a specific service group, but cannot perform generic cluster
operations.
See “About VCS user privileges and roles” on page 70.
Authority
(user-defined)
■
Type and dimension: string-keylist
■
Default: {} (none)
Indicates whether or not the local cluster is allowed to bring the
service group online. If set to 0, it is not, if set to 1, it is. Only one
cluster can have this attribute set to 1 for a specific global group.
See “About serialization–The Authority attribute” on page 467.
■
Type and dimension: integer-scalar
■
Default: 0
627
VCS attributes
Service group attributes
Table C-3
Service group attributes (continued)
Service Group
Attributes
Definition
AutoDisabled
Indicates that VCS does not know the status of a service group (or
specified system for parallel service groups). This could occur
because the group is not probed (on specified system for parallel
groups) in the SystemList attribute. Or the VCS engine is not running
on a node designated in the SystemList attribute, but the node is
visible.
(system use only)
When VCS does not know the status of a service group on a node
but you want VCS to consider the service group enabled, perform
this co