Setting Up Multiple OpenManage
Essentials Instances on the Same SQL
Server Database Instance
This Dell technical white paper explains how to redirect OpenManage
Essentials to a system on a single SQL Server database instance so that one
SQL Server database instance supports multiple OpenManage Essentials
instances.
OME Engineering Team
Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
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inaccuracies. The content is provided as is, without express or implied warranties of any kind.
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July 2013| Version 1.0
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
Contents
Executive Summary ..................................................................................................... 4
Introduction .............................................................................................................. 4
Advantages of setting up multiple OpenManage Essentials installations to run on same instance of
SQL Server database .................................................................................................. 4
Setting Up Multiple OpenManage Essentials Installations on a Single SQL Server Instance ................ 5
First Approach: Back Up and Restore ............................................................................ 6
Second Approach: Using MDF/LDF Files .......................................................................... 9
Removing the Connection Between OpenManage Essentials and the Database ........................ 11
Common Problem During Back-Up/Restore Process ........................................................... 17
Conclusion .............................................................................................................. 17
Figures
Figure 1.
Installing OpenManage Essentials on a Local Server Without SQL ................................. 5
Figure 2.
Creating a Back-Up of the OpenManage Essentials Database ...................................... 6
Figure 3.
Final Step in Creating a Back Up of the OpenManage Essentials Database ...................... 7
Figure 4.
Restoring the Database ................................................................................... 8
Figure 5.
Restoring the Back Up of OpenManage Essentials Database ........................................ 9
Figure 6.
Taking the OpenManage Essentials Database Offline .............................................. 10
Figure 7.
Attaching the OpenManage Essentials Database Using MDF/LDF Files .......................... 11
Figure 8.
Changing the Account Password for the OpenManage Essentials Database .................... 12
Figure 9.
Changing the Status of OpenManage Essentials Database ........................................ 13
Figure 10. Connection is Lost Between OpenManage Essentials and the Database ........................ 14
Figure 11. Database Retargeting to the Centralized SQL Database .......................................... 14
Figure 12. Changing the Registry Value Under Database ....................................................... 15
Figure 13. Changing the Registry Value Under UserDefined ................................................... 16
Figure 14. Restarting OpenManage Essentials Services From the Preferences page....................... 16
Figure 15. Microsoft SQL error which might occur during back-up and restore process .................. 17
Figure 16. Changing the details for restore to point to correct database back-up ........................ 17
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
Executive Summary
OpenManage Essentials is a one-to-many systems management tool which helps in monitoring servers,
storage devices, printers, KVMs, UPSs, PDUs, chassis and network devices, etc. With the highest
configuration supported (i.e. 8 GB RAM and 8 core processor) on the server running OpenManage
Essentials, a maximum of 2000 devices can be monitored using OpenManage Essentials. This white
paper provides a way to scale up the monitoring to more than 2000 devices by targeting multiple
OpenManage Essentials instances to the same SQL Server database instance. The only pre-requisite is to
install OpenManage Essentials on multiple servers first, as one server supports only one installation of
OpenManage Essentials. This scalability feature is supported by OpenManage Essentials v1.2 and
above.
Introduction
The goal of this white paper is to describe how you can set up multiple OpenManage Essentials
instances to run on the same SQL Server instance. When there are multiple OpenManage Essentials
instances running on the same SQL Server instance, then the administrator has the privilege of using a
single system for installing SQL Server which is used as the database for all OpenManage Essentials
instances.
During installation, OpenManage Essentials supports the installation of only one OpenManage Essentials
server on one database. This white paper provides a way to set up multiple OpenManage Essentials
instances to run on the same database instance. Instead of installing multiple SQL Servers, the
administrator can install OpenManage Essentials with a local database using SQL Express 2012 which is
included with OpenManage Essentials v1.2.
Advantages of setting up multiple OpenManage Essentials instances to run on
same instance of SQL Server database
1. When there are multiple subnets, sites and geographies that need to be managed, multiple
OpenManage Essentials servers managing different geographies can be run on the same database
instead of all being run on different databases.
2. When the set up is such that there is a centralized SQL Server which is used as the database for
various applications, then OpenManage Essentials can be installed on the same centralized SQL
Server instead of having multiple systems running SQL Server for all the OpenManage Essentials
servers.
3. There is a limit to manage only 2000 devices using one OpenManage Essentials server. If there are
more than 2000 devices that need to be managed in a data center, setting up multiple OpenManage
Essentials instances on the same SQL Server instance, allows you to scale up the management of all
the devices on the same SQL database.
4. Multiple OpenManage Essentials servers can be installed with different databases and database
names respectively, on the same SQL Server instance. Doing this helps in saving resources and time
which would otherwise be consumed in the creation of individual SQL databases for the installation
of each OpenManage Essentials instance.
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
Setting Up Multiple OpenManage Essentials Instances on a Single
SQL Server Instance
1. Install OpenManage Essentials on the remote or local database which is the centralized SQL
server. For this example, let us assume it as OMEssentials1.
2. On another server, install OpenManage Essentials on a different local or remote database.
OpenManage Essentials can also be installed on a local server that does not have a database.
While installing OpenManage Essentials, if a database is not found, then OpenManage Essentials
prompts for the installation of SQL Express 2012 on the local server as shown in Figure 1. On
clicking ‘Yes’, SQL Express 2012 will be installed on the same server and after that a typical or
custom installation of OpenManage Essentials can be performed. For this example, let us
assume this OpenManage Essentials to be OMEssentials2.
Figure 1.
Installing OpenManage Essentials on a Local Server Without SQL
3. Copy the SQL Server database instance from the second OpenManage Essentials instance( i.e.
OMEssentials2) and attach it to the centralized SQL server. This can be done in two ways:
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
First Approach: Back Up and Restore
i.
Launch SQL Server Management Studio and connect to the OpenManage Essentials
database.
ii.
Right click Databases>>OMEssentials and click “Back Up” under “Tasks” as shown in
Figure 2.
Figure 2.
Creating a Back-Up of the OpenManage Essentials Database
iii.
A window will open as shown in Figure 3. Verify that the values are the same as shown
in Figure 3, and then click “OK.”
iv.
The back up is created in the mentioned folder location under “Destination”. Copy the
back up file to the centralized SQL server.
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
Figure 3.
v.
Final Step in Creating a Back Up of the OpenManage Essentials Database
Launch SQL Server Management Studio on the centralized SQL server and right-click
“Databases” and select “Restore Database.”
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
Figure 4.
vi.
Restoring the Database
Enter the name of the database and provide the location of the back up database in
the window that opens as shown in Figure 5.
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
Figure 5.
vii.
Restoring the Back Up of OpenManage Essentials Database
Click “OK.” The new database should be created and shown under databases with the
name as given by the administrator.
Second Approach: Using MDF/LDF Files
i.
Identify the location of the mdf and ldf files: right-click the database and select
“Properties”. In the window that opens, click “Files” and copy the location of the
mdf and ldf files
ii.
Stop the SQL Server service for the instance on which OpenManage Essentials is
installed or take the database offline. The service can be stopped from “SQL Server
Configuration Manager” or by typing services.msc in the Run console. To take the
database offline, right-click the database and select “Take Offline” under “Tasks” as
shown in Figure 6.
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
Figure 6.
Taking the OpenManage Essentials Database Offline
iii.
Once the database is offline, open the location of the mdf/ldf files and copy the files.
Change the name of the mdf and ldf files to anything other than OMEssentials.mdf and
OMEssentials_1.mdf. Assume, OMEssentials2.mdf and OMEssentials2_1.ldf.
iv.
Copy these renamed mdf/ldf files to the centralized SQL server.
v.
Once the files are copied, launch the Microsoft SQL server Management Studio” in the
centralized SQL server and right-click “Databases”.
vi.
Click “Attach”. A window opens up. Enter the name of the database under “Databases
to attach” by clicking “Add”. Change the name under the “Attach As” option to
match the name of the copied mdf and ldf files shown in Figure 7.
vii.
Provide the path of the mdf and ldf files in “Current File Path” under “OMEssentials
database details” as shown in Figure 7.
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
viii.
Figure 7.
Click “OK”. The new database should be created and shown under databases with the
name as given by the administrator.
Attaching the OpenManage Essentials Database Using MDF/LDF Files
4. Remove the connection between second OpenManage Essentials and the database. This can be
done as explained in the steps below.
Removing the Connection Between OpenManage Essentials and the Database
i.
Launch SQL Server Management Studio and login.
ii.
Navigate to Security Logins and right-click the login used for installing OpenManage
Essentials. If it is a typical installation, a login with the name “OMEService” gets
created.
iii.
Click “Properties” and under the “General” section change the password as shown in
Figure 8 or change the “status” as shown in Figure 9.
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
Figure 8.
Changing the Account Password for the OpenManage Essentials Database
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
Figure 9.
iv.
Changing the Status of OpenManage Essentials Database
Click “OK”.
5. Shut down the first OpenManage Essentials instance. Keep it off till the second OpenManage
Essentials instance is up and running.
6. Once the connection between database and OpenManage Essentials is lost in the second
OpenManage Essentials (i.e. OMEssentials2), a pop up is shown on the OpenManage Essentials
screen which helps in database retargeting as shown in Figure 10. Click “OK”.
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
Figure 10.
Connection is Lost Between OpenManage Essentials and the Database
7. Provide the IP or hostname of the centralized SQL database and the credentials as show in
Figure 11. Click “Connect”.
Figure 11.
Database Retargeting to the Centralized SQL Database
8. Once the retargeting is complete, the second OpenManage Essentials instance will start using
the database of the first OpenManage Essentials instance. Launch the registry editor in the
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
server with the second OpenManage Essentials instance (i.e. OMEssentials2) using regedit in
the Run console.
9. Change the key value for these “value name” as shown in Figure 12 to the name of the new
database (i.e. OMEssentials2), so that it can point to the restored database.
i.
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Dell Computer Corporation\Dell
OpenManage Essentials\Database
Figure 12.
ii.
Changing the Registry Value Under Database
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Dell Computer Corporation\Dell
OpenManage Essentials\Database\UserDefined
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
Figure 13.
Changing the Registry Value Under UserDefined
10. Restart OpenManage Essentials services from the Preferences page as shown in Figure 14. This
is for setting up the odbc connection with the new database.
Figure 14.
Restarting OpenManage Essentials Services From the Preferences page
11. Reset IIS from the command prompt using the iisreset command.
12. The second OpenManage Essentials instance should now be pointing to its original database
which was restored.
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Setting Up Multiple OpenManage Essentials Instances on the Same SQL Server Database Instance
13. Start the first OpenManage Essentials instance, which should be pointing to its own database.
Common Problem During Back-Up/Restore Process
During the back up and restore process, there is a possibility of landing up on this common problem
where SQL throws an error as shown in Figure 15.
Figure 15.
Microsoft SQL error which might occur during back-up and restore process
Microsoft SQL server by default takes OMEssentials.mdf and OMEssentials_1.ldf files during the restore
operation. The path of the files needs to be changed to point to the backed up database. To fix this
problem, go back to the restore operation performed as indicated in Figure 16 and edit the files to
point to a new name and the new backed up database.
Figure 16.
Changing the details for restore to point to correct database back-up
Conclusion
OpenManage Essentials version 1.2 provides this feature of using the same SQL Server database
instance with multiple databases for multiple OpenManage Essentials installations. Using this feature,
the same SQL server can be used to manage more than 2000 devices and it helps in managing devices
which are located in a different subnets or different geographical location.
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