Red Hat NETWORK PROXY SERVER 4.0 - Installation guide

Red Hat NETWORK PROXY SERVER 4.0 - Installation guide
Red Hat Network Satellite 5.3
Proxy Installation Guide
Red Hat Network Proxy
Edition 5.3
Landmann
Red Hat Network Satellite 5.3 Proxy Installation Guide
Red Hat Network Proxy
Edition 5.3
Landmann
[email protected] m
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Abstract
Welcome to the RHN Proxy Installation Guide.
Table of Contents
Table of Contents
.Chapter
. . . . . . . . 1.
. . .Introduction
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4. . . . . . . . . .
1.1. Red Hat Network
4
1.2. RHN Proxy Server
4
1.3. T erms to Understand
5
1.4. How it Works
6
.Chapter
. . . . . . . . 2.
. . .Requirements
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8. . . . . . . . . .
2.1. Software Requirements
8
2.2. Hardware Requirements
9
2.3. Disk Space Requirements
9
2.4. Additional Requirements
9
.Chapter
. . . . . . . . 3.
. . .Example
. . . . . . . . .T. opologies
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
............
3.1. Single Proxy T opology
12
3.2. Multiple Proxy Horizontally T iered T opology
12
3.3. Multiple Proxy Vertically T iered T opology
13
3.4. Proxies with RHN Satellite Server
13
.Chapter
........4
. ...Installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
............
4.1. Base Install
15
4.2. RHN Proxy Server Installation Process
15
4.2.1. T he Answer File
18
.Chapter
. . . . . . . . 5.
. . .RHN
. . . . .Package
. . . . . . . . . Manager
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
............
5.1. Creating a Private Channel
20
5.2. Uploading Packages
20
5.3. Command Line Options
21
.Chapter
. . . . . . . . 6.
. . .T. roubleshooting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
...........
6.1. Managing the Proxy Service
23
6.2. Log Files
23
6.3. Questions and Answers
23
6.4. General Problems
24
6.5. Host Not Found/Could Not Determine FQDN
25
6.6. Connection Errors
25
6.7. Caching Issues
26
6.8. Proxy Debugging by Red Hat
26
. . . . . Proxy
RHN
. . . . . . .Server
. . . . . . . Installation
. . . . . . . . . . . . via
. . . .Satellite
. . . . . . . . . Website
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
............
. . . . . . . . .RHN
Sample
. . . . Proxy
. . . . . . .Server
. . . . . . . Configuration
. . . . . . . . . . . . . . .File
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
............
. . . . . . . . . .History
Revision
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
...........
.Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
...........
A
35
C
35
D
35
G
35
H
35
I
36
L
36
O
36
P
36
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Red Hat Network Satellite 5.3 Proxy Installation Guide
Q
R
S
T
2
36
36
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Table of Contents
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Red Hat Network Satellite 5.3 Proxy Installation Guide
Chapter 1. Introduction
1.1. Red Hat Network
Red Hat Network (RHN) is the environment for system-level support and management of Red Hat
systems and networks of systems. Red Hat Network brings together the tools, services, and information
repositories needed to maximize the reliability, security, and performance of their systems. T o use RHN,
system administrators register the software and hardware profiles, known as System Profiles, of their
client systems with Red Hat Network. When a client system requests package updates, only the
applicable packages for the client are returned (based upon the software profile stored on the RHN
Servers).
Advantages of using Red Hat Network include:
Scalability — with Red Hat Network, a single system administrator can set up and maintain hundreds
or thousands of Red Hat systems more easily, accurately, and quickly than they could maintain a
single system without Red Hat Network.
Standard Protocols — standard protocols are used to maintain security and increase capability. For
example, XML-RPC gives Red Hat Network the ability to do much more than merely download files.
Security — all communication between registered systems and Red Hat Network takes place over
secure Internet connections.
View Errata Alerts — easily view Errata Alerts for all your client systems through one website.
Scheduled Actions — use the website to schedule actions, including Errata Updates, package
installs, and software profile updates.
Simplification — maintaining Red Hat systems becomes a simple, automated process.
1.2. RHN Proxy Server
An RHN Proxy Server is a package-caching mechanism that reduces the bandwidth requirements for
RHN and enables custom package deployment. Proxy customers cache RPMs, such as Errata Updates
from Red Hat or custom RPMs generated by their organization, on an internal, centrally-located server.
Client systems then receive these updates from the Proxy rather than by accessing the Internet
individually.
Although the packages are served by the Proxy, clients' System Profiles and user information are stored
on the secure, central RHN Servers [1] , which also serve the RHN website (rhn.redhat.com). T he Proxy
acts as a go-between for client systems and Red Hat Network (or an RHN Satellite Server). Only the
package files are stored on the RHN Proxy Server. Every transaction is authenticated, and the Red Hat
Update Agent checks the GPG signature of each package retrieved from the local RHN Proxy Server.
In addition to storing official Red Hat packages, the RHN Proxy Server can be configured to deliver an
organization's own custom packages from private RHN channels, using the RHN Package Manager. For
instance, an organization could develop its own software, package it in an RPM, sign it with its own GPG
signature, and have the local RHN Proxy Server update all of the individual systems in the network with
the latest versions of the custom software.
Advantages of using RHN Proxy Server include:
Scalability — there can be multiple local RHN Proxy Servers within one organization.
Security — an end-to-end secure connection is maintained: from the client systems, to the local RHN
Proxy Server, to the Red Hat Network servers.
Saves time — packages are delivered significantly faster over a local area network than the Internet.
4
Chapter 1. Introduction
Saves bandwidth — packages are downloaded from RHN only once (per local Proxy Server's
caching mechanism) instead of downloading each package to each client system.
Customized updates — create a truly automated package delivery system for custom software
packages, as well as official Red Hat packages required for the client systems. Custom private RHN
channels allow an organization to automate delivery of in-house packages.
Customized configuration — restrict or grant updates to specific architectures and OS versions.
Only one Internet connection required — Because clients connect only to the RHN Proxy Server and
not the Internet, they require only a Local Area Network connection to the Proxy. Only the RHN Proxy
Server needs an Internet connection to contact the RHN Servers, unless the RHN Proxy Server is
using a RHN Satellite Server, in which case only the RHN Satellite Server requires an Internet
connection.
1.3. Terms to Understand
Before understanding RHN Proxy Server, it is important to become familiar with the following Red Hat
Network terms:
Channel
A channel is a list of software packages. T here are two types of channels: base channels and
child channels. A base channel consists of a list of packages based on a specific architecture
and Red Hat release. A child channel is a channel associated with a base channel that contains
extra packages.
Organization Administrator
An Organization Administrator is a user role with the highest level of control over an
organization's Red Hat Network account. Members with this role can add other users, other
systems, and system groups to the organization, as well as remove them. A Red Hat Network
organization must have at least one Organization Administrator.
Channel Administrator
A Channel Administrator is a user role with full access to channel management capabilities.
Users with this role are capable of creating channels and assigning packages to channels.
T his role can be assigned by an Organization Administrator through the Users tab of the RHN
website.
Red Hat Update Agent
T he Red Hat Update Agent is the Red Hat Network client application (up2date or yum ) that
allows users to retrieve and install new or updated packages for the client system on which the
application is run.
T raceback
A traceback is a detailed description of "what went wrong" that is useful for troubleshooting the
RHN Proxy Server. T racebacks are automatically generated when a critical error occurs and are
emailed to the individual(s) designated in the RHN Proxy Server's configuration file.
For more detailed explanations of these terms and others, refer to the Red Hat Network Reference
Guide available at http://www.redhat.com/docs/manuals/satellite/ and the Help page on the Satellite
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Red Hat Network Satellite 5.3 Proxy Installation Guide
Web user interface.
1.4. How it Works
T he Red Hat Update Agent or Package Updater on the client systems does not directly contact a Red
Hat Network Server. Instead, the client (or clients) connects in turn to an RHN Proxy Server that
connects to the Red Hat Network Servers or to a RHN Satellite Server. T hus, the client systems do not
need direct access to the Internet. T hey need access only to the RHN Proxy Server.
Important
Red Hat strongly recommends that clients connected to an RHN Proxy Server be running the
latest update of Red Hat Enterprise Linux to ensure proper connectivity.
Clients that access RHN directly are authenticated by the RHN servers. Clients that access an RHN
Proxy Server are still authenticated by RHN; however, in this case the Proxy provides both authentication
and route information to RHN. After a successful authentication, the Red Hat Network Server informs the
RHN Proxy Server that it is permitted to execute a specific action for the client. T he RHN Proxy Server
downloads all of the updated packages (if they are not already present in its cache) and delivers them to
the client system.
Requests from the Red Hat Update Agent or Package Updater on the client systems are still
authenticated on the server side, but package delivery is significantly faster since the packages are
cached in the HT T P Proxy Caching Server or the RHN Proxy Server (for local packages); the RHN Proxy
Server and client system are connected via the LAN and are limited only by the speed of the local
network.
Authentication is done in the following order:
1. T he client performs a login action at the beginning of a client session. T his login is passed
through one or more RHN Proxy Servers until it reaches a Red Hat Network Server.
2. T he Red Hat Network Server attempts to authenticate the client. If authentication is successful, the
server then passes back a session token via the chain of RHN Proxy Servers. T his token, which
has a signature and expiration, contains user information, including channel subscriptions,
username, etc.
3. Each RHN Proxy Server caches this token on its local file system in /var/cache/rhn/. Caching
reduces some of the overhead of authenticating with Red Hat Network Servers and greatly
improves the performance of Red Hat Network.
4. T his session token is passed back to the client machine and is used in subsequent actions on
Red Hat Network.
From the client's point of view, there is no difference between an RHN Proxy Server and a Red Hat
Network Server. From the Red Hat Network Server's point of view, an RHN Proxy Server is a special type
of RHN client. Clients are thus not affected by the route a request takes to reach a Red Hat Network
Server. All the logic is implemented in the RHN Proxy Servers and Red Hat Network Servers.
Optionally, the RHN Package Manager can be installed and configured to serve custom packages. Any
package that is not an official Red Hat package, including custom packages written specifically for an
organization, can only be served from a private software channel (also referred to as a custom software
channel). After creating a private RHN channel, the custom RPM packages are associated with that
channel by uploading the package headers to the RHN Servers. Only the headers are uploaded, not the
actual package files. T he headers are required because they contain crucial RPM information, such as
6
Chapter 1. Introduction
software dependencies, that allows RHN to automate package installation. T he actual custom RPM
packages are stored on the RHN Proxy Server and sent to the client systems from inside the
organization's local area network.
Configuring a computer network to use RHN Proxy Servers is straightforward. T he Red Hat Network
applications on the client systems must be configured to connect to the RHN Proxy Server instead of the
Red Hat Network Servers. Refer to the RHN Client Configuration Guide for details. On the proxy side,
one has to specify the next proxy in the chain (which eventually ends with a Red Hat Network Server). If
the RHN Package Manager is used, the client systems must be subscribed to the private RHN channel.
[1] Thro ug ho ut this d o c ument, " RHN" may refer to either RHN' s Ho s ted s ite (http ://rhn.red hat.c o m) o r an RHN Satellite Server.
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Red Hat Network Satellite 5.3 Proxy Installation Guide
Chapter 2. Requirements
T hese requirements must be met before installation. T he Satellite itself must be of a version greater
than or equal to the version of the Proxy that you are trying to install. For example, if you want to install
RHN Proxy Server 5.1, the Satellite version should be 5.1 or later, and can not be 5.0 or lower.
2.1. Software Requirements
T o perform an installation, the following software-related components must be available:
Base operating system — RHN Proxy Server is supported with Red Hat Enterprise Linux AS 4 or
Red Hat Enterprise Linux 5. T he operating system can be installed from disc, local ISO image,
kickstart, or any of the methods supported by Red Hat.
Note
Each purchased RHN Proxy product includes one supported instance of Red Hat Enterprise
Linux Server. RHN Proxy must be installed onto a fresh installation of Enterprise Linux where
RHN Proxy is the only application and service provided by the OS. Using the Red Hat
Enterprise Linux OS included in RHN Proxy to run other daemons, applications, or services
within your environment is not supported.
Each version of Red Hat Enterprise Linux requires a certain package set to support RHN Proxy
Server. Adding more packages can cause errors during installation. T herefore, Red Hat recommends
obtaining the desired package set in the following ways:
Note
For kickstarting, specify the following package group: @ Base
For installing Red Hat Enterprise Linux via CD or ISO image, select the following package
group: Minim al
Warning
If you are running Red Hat Enterprise Linux AS 4, Security-enhanced Linux (SELinux) must be
disabled prior to installation of RHN Proxy Server. If you use Red Hat Enterprise Linux 5
Server, SELinux can be left enabled when installing RHN Proxy Server.
You can disable SELinux in one of several ways:
During CD or ISO image installation, select Disabled when presented with options for
SELinux support.
T o do this for kickstart installation, include the command selinux --disabled
After the installation is complete, edit the /etc/selinux/config file to read
SELINUX=disabled and reboot the system.
Finally, you can use the system -config-securitylevel-tui command and reboot
the system.
An available RHN Proxy Server entitlement within your RHN Satellite Server account.
An available Provisioning entitlement within your RHN Satellite Server account (which should come
packaged with your RHN Proxy Server entitlement).
8
Chapter 2. Requirements
Access to the Red Hat Network T ools channel for the installed version of Red Hat Enterprise Linux.
T his channel includes the spacewalk-proxy-installer package that contains the
configure-proxy.sh installation program required to install RHN Proxy Server.
All rhncfg* packages installed on the Proxy (from the RHN T ools channel).
Either the rhns-certs-tools package installed on the Proxy (from the RHN T ools channel) for
RHN Hosted users, or the secure sockets layer (SSL) CA certificate password used to generate the
parent server certificate for RHN Satellite Server users.
Configuration of the system to accept remote commands and configuration management through Red
Hat Network if using the deprecated Web UI installation method. Refer to Section 4.2, “RHN Proxy
Server Installation Process” for instructions.
2.2. Hardware Requirements
T he following hardware configuration is required for the RHN Proxy Server:
A Pentium IV Processor or equivalent
512 MB of memory
At least 5 GB storage for base install of Red Hat Enterprise Linux
25+ GB storage per distribution/channel
T he load on the Apache Web server is directly related to the frequency with which client systems
connect to the Proxy. If you reduce the default interval of four hours (or 240 minutes) as set in the
/etc/sysconfig/rhn/rhnsd configuration file of the client systems, you will increase the load on this
component significantly.
Note
RHN Proxy Server does not support kickstart provisioning on multi-homed network topologies.
Kickstarts will not function properly on a Proxy server that has more than one network interface.
2.3. Disk Space Requirements
T he caching mechanism used by RHN Proxy Server is the Squid HT T P proxy, which saves significant
bandwidth for the clients. It should have a reasonable amount of space available. T he cached packages
are stored in /var/spool/squid. T he required free space allotment is 6 GB storage per
distribution/channel.
If the RHN Proxy Server is configured to distribute custom, or local packages, make sure that the /var
mount point on the system storing local packages has sufficient disk space to hold all of the custom
packages, which are stored in /var/spool/rhn-proxy. T he required disk space for local packages
depends on the number of custom packages served.
2.4. Additional Requirements
T he following additional requirements must be met before the RHN Proxy Server installation can be
considered complete:
Full Access
Client systems need full network access to the RHN Proxy Server services and ports.
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Red Hat Network Satellite 5.3 Proxy Installation Guide
Firewall Rules
RHN strongly recommends firewalling the RHN Proxy Server solution from the Internet.
However, various T CP ports must be opened on the Proxy, depending on your implementation
of RHN Proxy Server:
T able 2.1. Ports to open on the Proxy
Port
Direction
Reason
80
Outbound
Proxy uses this port to reach
rhn.redhat.com, xmlrpc.rhn.redhat.com,
and your Satellite URL (depending on
whether RHN Proxy is talking to either
RHN Hosted or a Satellite Server).
80
Inbound
Client requests come in via either http
or https
443
Inbound
Client requests come in via either http
or https
443
Outbound
Proxy uses this port to reach
rhn.redhat.com, xmlrpc.rhn.redhat.com,
and your Satellite URL (depending on
whether RHN Proxy is talking to either
RHN Hosted or a Satellite Server).
4545
Outbound
If your Proxy is connected to an RHN
Satellite Server, Monitoring makes
connections to rhnm d running on client
systems via this T CP port, if Monitoring
is enabled and probes configured to
registered systems.
5222
Inbound
Opening this port allows osad client
connections to the jabberd daemon
on the Proxy when using RHN Push
technology.
5269
Outbound
If your Proxy is connected an RHN
Satellite Server, this port must be open
to allows server-to-server connections
via jabberd for RHN Push
T echnology.
Synchronized System T imes
T here is great time sensitivity when connecting to a Web server running SSL (Secure Sockets
Layer); it is imperative the time settings on the clients and server are reasonably close together
so the that SSL certificate does not expire before or during use. It is recommended that Network
T ime Protocol (NT P) be used to synchronize the clocks.
Fully Qualified Domain Name (FQDN)
T he system upon which the RHN Proxy Server will be installed must resolve its own FQDN
properly.
10
Chapter 2. Requirements
A Red Hat Network Account
Customers who will be connecting to the central Red Hat Network Servers to receive
incremental updates must have a Red Hat Network account. T he sales representative assists
with the setup of this account at the time of purchase.
Backups of Login Information
It is imperative that customers keep track of all primary login information. For RHN Proxy Server,
this includes usernames and passwords for the Organization Administrator account and SSL
certificate generation. Red Hat strongly recommends this information be copied onto two
separate floppy disks, printed out on paper, and stored in a fireproof safe.
Distribution Locations
Since the Proxy forwards virtually all local HT T P requests to the central RHN Servers, you must
take care to put files destined for distribution (such as in a kickstart installation tree) in the nonforwarding location on the Proxy: /var/www/htm l/pub/. Files placed in this directory can be
downloaded directly from the Proxy. T his can be especially useful for distributing GPG keys or
establishing installation trees for kickstarts.
In addition, Red Hat recommends that the system running the code not be publicly available. No users
but the system administrators should have shell access to these machines. All unnecessary services
should be disabled. You can use ntsysv or chkconfig to disable services.
Finally, you should have the following technical documents in hand for use in roughly this order:
1. The RHN Proxy Server Installation Guide — T his guide, which you are now reading, provides the
essential steps necessary to get an RHN Proxy Server up and running.
2. The RHN Client Configuration Guide — T his guide explains how to configure the systems to be
served by an RHN Proxy Server or RHN Satellite Server. (T his will also likely require referencing
The RHN Reference Guide, which contains steps for registering and updating systems.)
3. The RHN Channel Management Guide — T his guide identifies in great detail the recommended
methods for building custom packages, creating custom channels, and managing private Errata.
4. The RHN Reference Guide — T his guide describes how to create RHN accounts, register and
update systems, and use the RHN website to its utmost potential. T his guide will probably come in
handy throughout the installation and configuration process.
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Red Hat Network Satellite 5.3 Proxy Installation Guide
Chapter 3. Example Topologies
T he RHN Proxy Server can be configured in multiple ways. Select one method depending on the
following factors:
1. T he total number of client systems to be served by the RHN Proxy Server
2. T he maximum number of clients expected to connect concurrently to the RHN Proxy Server.
3. T he number of custom packages and channels to be served by the RHN Proxy Server.
4. T he number of RHN Proxy Servers being used in the customer environment.
T he rest of this chapter describes possible configurations and explains their benefits.
3.1. Single Proxy Topology
T he simplest configuration is to use a single RHN Proxy Server to serve your entire network. T his
configuration is adequate to service a small group of clients and a network that would benefit from
caching Red Hat RPMs and storing custom packages on a local server.
T he disadvantage of using one RHN Proxy Server is that performance will be compromised as the
number of clients requesting packages grows.
Figure 3.1. Single Proxy T opology
3.2. Multiple Proxy Horizontally Tiered Topology
For larger networks, a more distributed method may be needed, such as having multiple RHN Proxy
Servers all connecting to Red Hat Network individually. T his horizontally tiered configuration balances
the load of client requests while enabling each Proxy to simultaneously synchronize with RHN.
A disadvantage of this horizontal structure is that custom packages loaded to an individual Proxy must
be distributed to its sibling servers. T his situation can be addressed in one of two ways:
T he rsync file transfer program can be used to synchronize packages between the Proxies
A Network File System (NFS) share can be established between the Proxies and the custom channel
repository.
Either of these solutions will allow any client of any RHN Proxy Servers to have all custom packages
delivered to them.
12
Chapter 3. Example Topologies
Figure 3.2. Multiple Proxy Horizontally T iered T opology
3.3. Multiple Proxy Vertically Tiered Topology
An alternative method for multiple RHN Proxy Servers is to establish a primary Proxy that the others
connect to for RPMs from Red Hat Network and custom packages created locally. In essence, the
secondary Proxies act as clients of the primary. T his alleviates the need to establish synchronization
between the RHN Proxy Servers as they use the up2date functionality inherent with the product.
Like the horizontally tiered configuration, this vertical method allows any client of any RHN Proxy Servers
to have all custom packages delivered to them. T he Proxy merely looks in its repository to see if it can
find the package on its file system. If not, it then makes the attempt from the next level up.
T his vertically tiered configuration ensures that the secondary Proxies depend upon the primary for
updates from RHN, as well as for custom packages. Also, custom channels and packages must be
placed on the primary Proxy only, to ensure distribution to the child Proxies. Finally, the configuration files
of the secondary Proxies must point to the primary, instead of directly at Red Hat Network.
Figure 3.3. Multiple Proxy Vertically T iered T opology
3.4. Proxies with RHN Satellite Server
In addition to the methods described in detail within this chapter, customers also have the option of
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Red Hat Network Satellite 5.3 Proxy Installation Guide
using RHN Proxy Server in conjunction with RHN Satellite Server. T his works similarly to the vertically
tiered Proxy configuration but increases capacity significantly, as Satellites can serve a much greater
number of client systems.
For a thorough description of this combination, refer to the Example T opologies chapter of the RHN
Satellite Server Installation Guide. Linking the two products' SSL certificates is described in the RHN
Client Configuration Guide. T o find out how channels and packages are shared between them, refer to
the RHN Channel Management Guide.
14
Chapter 4. Installation
Chapter 4. Installation
T his chapter describes the initial installation of the RHN Proxy Server. It presumes the prerequisites
listed in Chapter 2, Requirements have been met. However, if you are upgrading to a newer version of
RHN Proxy Server, contact your Red Hat representative for assistance.
4.1. Base Install
T he RHN Proxy Server is designed to run on the Red Hat Enterprise Linux operating system. T herefore,
the first phase is to install the base operating system, either from disc, ISO image, or kickstart. During
and after operating system installation, make sure you:
Allocate sufficient space to the partition that will be used to store packages, according to the
hardware requirements set forth earlier. T he default location for cached Red Hat packages is
/var/spool/squid, while custom packages are located in /var/spool/rhn-proxy.
Note
T he installation program automatically calcutes the available space on the partition where
/var/spool/squid is mounted and allocates up to 60 percent of the free space for RHN
Proxy Server use.
Install the packages required by RHN Proxy Server.
Note
You must install only the base packages, as others will cause the RHN Proxy Server
installation to fail.
Refer to Section 2.1, “Software Requirements” for the method to obtain the correct package group
needed for each version of Red Hat Enterprise Linux.
Enable Network T ime Protocol (NT P) on the Proxy and select the appropriate time zone. All client
systems should already be running the ntpd daemon and be set to the correct time zone.
Disable the ipchains and iptables services after installation.
4.2. RHN Proxy Server Installation Process
T he following instructions describe the RHN Proxy Server installation process:
1. Register the newly-installed Red Hat Enterprise Linux system with Red Hat Network (either the
central RHN Servers or your RHN Satellite Server) using the organizational account containing the
RHN Proxy Server entitlement with the command: rhn_register.
2. T o perform an installation, type the following command:
configure-proxy.sh
T he command-line installation program leads users through a series of prompts regarding RHN
Proxy Server installation and initial configuration details such as installation options and SSL
certificate generation. T he following instructions describe the installation process:
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Red Hat Network Satellite 5.3 Proxy Installation Guide
Tip
If you press Enter at a prompt instead of typing in an entry, the RHN Proxy Server
command-line installation program uses the default response enclosed in brackets.
Alternatively, if you want to use default answers without any user interaction, use the -non-interactive option, which will use all default responses.
3. T he first series of prompts are site-specific details about the installation.
Proxy version to activate [5.3]:
T he Proxy version prompts you to confirm the version of RHN Proxy Server you wish to install.
RHN Parent [satserver.example.com]:
T he RHN Parent is the domain name or address of the system that serves the Proxy, which
could be the RHN Hosted servers (xmlrpc.rhn.redhat.com), or an RHN Satellite Server server.
Traceback email []:
T he T raceback em ail is the email address to which error-related traceback messages are
mailed, usually the email of the Proxy administrator. Use commas to separate more than one email
address at this prompt.
4. T he next series of prompts are related to configuring the details for generating an SSL certificate,
which is recommended to secure traffic to and from the RHN Proxy Server.
Use SSL [Y/n]: y
In the Use SSL prompt, type y to configure the RHN Proxy Server to support SSL.
CA Chain [/usr/share/rhn/RHN-ORG-TRUSTED-SSL-CERT]:
In the CA Chain prompt, press Enter to use the default path for the Certificate Authority (CA)
Chain, which if the RHN Proxy is communicating with an RHN Satellite then this value is usually
/usr/share/rhn/RHN-ORG-T RUST ED-SSL-CERT . If it is communicating with RHN Hosted, it is
usually the /usr/share/rhn/RHNS-CA-CERT file.
HTTP Proxy []:
If the RHN Proxy Server connects through an HT T P proxy, enter the proxy hostname and port
number, such as corporate.proxy.exam ple.com :3128
16
Chapter 4. Installation
Regardless of whether you enabled SSL for the connection to the Proxy Parent
Server, you will be prompted to generate an SSL certificate.
This SSL certificate will allow client systems to connect to this Spacewalk
Proxy
securely. Refer to the Spacewalk Proxy Installation Guide for more
information.
Organization: Example Company
Organization Unit [proxy1.example.com]:
Common Name: proxy1.example.com
City: New York
State: New York
Country code: US
Email [[email protected]]:
Enter the required details necessary to generate a proper SSL server certificate, including the
Organzation name, the Organization Unit (such as Engineering), the Com m on Nam e
(the domain name), as well as the details for City, State and Country. Finally, enter the email
address for the administrator or technical contact in charge of SSL certificates.
5. T he command-line installation program prompts you to install monitoring support to RHN Proxy
Server, allows you to create and populate a configuration channel for future RHN Proxy Server
installations, finalizes SSL configuration, and restarts any service daemons that had modified
configurations as a result of running the RHN Proxy Server installation program.
You do not have monitoring installed. Do you want to install it?
Will run 'yum install spacewalk-proxy-monitoring'. [Y/n]:n
Confirm whether or not you want to install Monitoring support on the Proxy server.
Generating CA key and public certificate:
CA password:
CA password confirmation:
Copying CA public certificate to /var/www/html/pub for distribution to
clients:
Generating SSL key and public certificate:
CA password:
Backup made: 'rhn-ca-openssl.cnf' --> 'rhn-ca-openssl.cnf.1'
Rotated: rhn-ca-openssl.cnf --> rhn-ca-openssl.cnf.1
Installing SSL certificate for Apache and Jabberd:
Preparing packages for installation...
rhn-org-httpd-ssl-key-pair-proxy1.example-1.0-1
T he configure-proxy.sh program then configures SSL, prompting you to create a Certificate
Authority password and confirm it before generating the SSL keys and the public certificate.
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Red Hat Network Satellite 5.3 Proxy Installation Guide
Create and populate configuration channel rhn_proxy_config_1000010000? [Y]:
Using server name satserver.example.com
Red Hat Network username: admin
Password:
Creating config channel rhn_proxy_config_1000010000
Config channel rhn_proxy_config_1000010000 created
using server name satserver.example.com
Pushing to channel rhn_proxy_config_1000010000:
Local file /etc/httpd/conf.d/ssl.conf -> remote file
/etc/httpd/conf.d/ssl.conf
Local file /etc/rhn/rhn.conf -> remote file /etc/rhn/rhn.conf
Local file /etc/rhn/cluster.ini -> remote file /etc/rhn/cluster.ini
Local file /etc/squid/squid.conf -> remote file /etc/squid/squid.conf
Local file /etc/httpd/conf.d/cobbler-proxy.conf -> remote file
/etc/httpd/conf.d/cobbler-proxy.conf
Local file /etc/httpd/conf.d/rhn_proxy.conf -> remote file
/etc/httpd/conf.d/rhn_proxy.conf
Local file /etc/httpd/conf.d/rhn_broker.conf -> remote file
/etc/httpd/conf.d/rhn_broker.conf
Local file /etc/httpd/conf.d/rhn_redirect.conf -> remote file
/etc/httpd/conf.d/rhn_redirect.conf
Local file /etc/jabberd/c2s.xml -> remote file /etc/jabberd/c2s.xml
Local file /etc/jabberd/sm.xml -> remote file /etc/jabberd/sm.xml
T he installer then asks whether or not you wish to create a configuration channel based on the
configuration files created while running configure-proxy.sh. T he installer will then create a
RHN Satellite Server configuration channel based on the name of the client system upon which
RHN Proxy Server is installed (in the example above the sysID is 1000010000), and collects the
various httpd, SSL, squid, and jabberd server files that will comprise the configuration
channel for the Proxy server.
6. Finally, the installer starts and restarts all RHN Proxy Server related services and exits when
completed.
Enabling Satellite Proxy
Shutting down rhn-proxy...
Shutting down Jabber router:
Stopping httpd:
Stopping squid:
Done.
Starting rhn-proxy...
init_cache_dir /var/spool/squid... Starting squid: .
Starting httpd:
Starting Jabber services
Done.
[ OK ]
[ OK ]
[ OK ]
[
[
[
OK ]
OK ]
OK ]
4.2.1. The Answer File
If you want to automate some of the process of installing RHN Proxy Server on your systems, the
configure-proxy.sh program allows administrators to create answer files that contain pre-filled
responses to prompts in the installation program.
T he following is an example answer file that contains pre-filled answers related to version number, the
RHN Satellite Server server that serves as the parent server, SSL, and other configuration parameters.
For more information about creating and using answer files, refer to the configure-proxy.sh manual
page by typing m an configure-proxy.sh at a shell prompt.
18
Chapter 4. Installation
# example of answer file for configure-proxy.sh
# for full list of possible option see
# man configure-proxy.sh
VERSION=5.2
RHN_PARENT=rhn-satellite.example.com
[email protected]
USE_SSL=1
SSL_ORG="Red Hat"
SSL_ORGUNIT="Spacewalk"
SSL_CITY=Raleigh
SSL_STATE=NC
SSL_COUNTRY=US
INSTALL_MONITORING=N
ENABLE_SCOUT=N
CA_CHAIN=/usr/share/rhn/RHN-ORG-TRUSTED-SSL-CERT
POPULATE_CONFIG_CHANNEL=Y
T o use an answer file (called answers.txt for example) with configure-proxy.sh, type the
following:
configure-proxy.sh --answer-file=answers.txt
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Red Hat Network Satellite 5.3 Proxy Installation Guide
Chapter 5. RHN Package Manager
T he RHN Package Manager is a command line tool that allows an organization to serve local packages
associated with a private RHN channel through the RHN Proxy Server. If you want the RHN Proxy Server
to update only official Red Hat packages, do not install the RHN Package Manager.
T o use the RHN Package Manager, install the rhns-proxy-package-m anager package and its
dependencies.
Only the header information for packages is uploaded to the RHN Servers. T he headers are required so
that RHN can resolve package dependencies for the client systems. T he actual package files (* .rpm )
are stored on the RHN Proxy Server.
T he RHN Package Manager uses the same settings as the Proxy, defined in the /etc/rhn/rhn.conf
configuration file.
5.1. Creating a Private Channel
Before local packages can be provided through the RHN Proxy Server, a private channel is needed to
store them. Perform the following steps to create a private channel:
1. Log in to the RHN Web interface at https://rhn.redhat.com.
2. Click Channels on the top navigation bar. If the Manage Channels option is not present in the
left navigation bar, ensure that this user has channel editing permissions set. Do this through the
Users category accessible through the top navigation bar.
3. In the left navigation bar, click Manage Software Channels and then the create new
channel button at the top-right corner of the page.
4. Select a parent channel and base channel architecture, then enter a name, label, summary, and
description for the new private channel. T he channel label must: be at least six characters long,
begin with a letter, and contain only lowercase letters, digits, dashes (-), and periods(.). Also enter
the URL of the channel's GPG key. Although this field is not required, it is recommended to
enhance security. For instructions on generating GPG keys, refer to the RHN Channel
Management Guide.
5. Click Create Channel.
5.2. Uploading Packages
Note
You must be an Organization Administrator to upload packages to private RHN channels. T he
script will prompt you for your RHN username and password.
After creating the private channel, upload the package headers for your binary and source RPMs to the
RHN Server and copy the packages to the RHN Proxy Broker Server. T o upload the package headers
for the binary RPMs, issue the following command:
rhn_package_manager -c "label_of_private_channel" pkg-list
pkg-list is the list of packages to be uploaded. Alternatively, use the -d option to specify the local
directory that contains the packages to add to the channel. Ensure that the directory contains only the
packages to be included and no other files. RHN Package Manager can also read the list of packages
20
Chapter 5. RHN Package Manager
from standard input (using --stdin).
T o upload the package headers for the source RPMs:
rhn_package_manager -c "label_of_private_channel" --source pkg-list
If you have more than one channel specified (using -c or --channel), the uploaded package headers
will be linked to all the channels listed.
Note
If a channel name is not specified, the packages are not added to any channel. T he packages
can then be added to a channel using the Red Hat Network web interface. T he interface can also
be used to modify existing private channels.
After uploading the packages, you can immediately check the RHN Web interface to verify their
presence. Click Channels in the top navigation bar, Manage Software Channels in the left
navigation bar, and then the name of the custom channel. T hen click the Packages subtab. Each RPM
should be listed.
You can also check to see if the local directory is in sync with the RHN Server's image of the channels at
the command line:
rhn_package_manager -s -c "label_of_private_channel"
T his -s option will list all the missing packages (packages uploaded to the RHN Server not present in
the local directory). You must be an Organization Administrator to use this command. T he script will
prompt you for your RHN username and password. Refer to T able 5.1, “rhn_package_m anager
options” for additional command line options.
If you are using the RHN Package Manager to update local packages, you must go to the RHN website
to subscribe the system to the private channel.
5.3. Command Line Options
A summary of all the command line options for RHN Package Manager rhn_package_m anager:
21
Red Hat Network Satellite 5.3 Proxy Installation Guide
T able 5.1. rhn_package_m anager options
Option
Description
-v, --verbose
Increase verbosity.
-dDIR, --dir=DIR
Process packages from directory DIR.
-cCHANNEL, --channel=CHANNEL
Manage this channel — may be present multiple times.
-nNUMBER, --count=NUMBER
Process this number of headers per call — the default is 32.
-l, --list
List each package name, version number, release number,
and architecture in the specified channel(s).
-s, --sync
Check if local directory is in sync with the server.
-p, --printconf
Print the current configuration and exit.
-XPATTERN, --exclude=PATTERN
Exclude files matching this glob expression — can be
present multiple times.
--newest
Push only the packages that are newer than packages
already pushed to the server for the specified channel.
--stdin
Read the package names from stdin.
--nosig
Push unsigned packages. By default the RHN Package
Manager attempts to push only signed packages.
--usernam e=USERNAME
Specify your RHN username. If you do not provide one with
this option, you will be prompted for it.
--password=PASSWORD
Specify your RHN password. If you do not provide one with
this option, you will be prompted for it.
--source
Upload source package headers.
--dontcopy
In the post-upload step, do not copy the packages to their
final location in the package tree.
--test
Only print the packages to be pushed.
--no-ssl
Not recommended — T urn off SSL.
-?, --usage
Briefly describe the options.
--copyonly
Copies the file listed in the argument into the specified
channel. Useful when a channel on the proxy is missing a
package and you don't want to reimport all of the packages
in the channel. E.g., rhn_package_m anager-cCHANNEL-copyonly/PATH/TO/MISSING/FILE
-h, --help
Display the help screen with a list of options.
Tip
T hese command line options are also described in the rhn_package_m anager man page:
m an rhn_package_m anager.
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Chapter 6. Troubleshooting
Chapter 6. Troubleshooting
T his chapter provides tips for determining the cause of and resolving the most common errors
associated with RHN Proxy Server. If you need additional help, contact Red Hat Network support at
https://rhn.redhat.com/help/contact.pxt. Log in using your Satellite-entitled account to see your full list of
options.
6.1. Managing the Proxy Service
Since the RHN Proxy Server consists of a multitude of individual components, Red Hat provides a script
called rhn-proxy, that allows you to stop, start, or retrieve status on the Proxy.
/usr/sbin/rhn-proxy
/usr/sbin/rhn-proxy
/usr/sbin/rhn-proxy
/usr/sbin/rhn-proxy
start
stop
restart
status
Use the rhn-proxy command to shut down and start the entire RHN Proxy Server and retrieve status
messages from all of its services at once.
6.2. Log Files
Virtually every troubleshooting step should start with a look at the associated log file or files. T hese files
provide invaluable information about the activity that has taken place on the device or within the
application and can be used to monitor performance and ensure proper configuration. See T able 6.1,
“Log Files” for the paths to all relevant log files:
T able 6.1. Log Files
Component
Log File Location
Apache Web server
/var/log/httpd/ directory
Squid
/var/log/squid/ directory
RHN Proxy Broker Server
/var/log/rhn/rhn_proxy_broker.log
RHN SSL Redirect Server
/var/log/rhn/rhn_proxy_redirect.log
Red Hat Update Agent
/var/log/yum .log
6.3. Questions and Answers
T his section contains the answers to the most frequently asked questions regarding installing and
configuring an RHN Proxy Server solution.
Q:
After configuring the RHN Package Manager how can I determine if the local packages
were successfully added to the private RHN channel?
A:
Use the command rhn_package_m anager -l -c "nam e_of_private_channel" to list
the private channel packages known to the RHN Servers. Or visit the RHN Web interface.
After subscribing a registered system to the private channel, you can also execute the command
up2date -l --showall on the registered system and look for the packages from the private
RHN channel.
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Red Hat Network Satellite 5.3 Proxy Installation Guide
Q:
I've changed the DNS name setting of my Proxy Server, and now my client systems
can't update. How can I fix this?
A:
Run the up2date -u command on the client system for the name change to take effect.
Q:
How can I determine whether the clients are connecting to the Squid server?
A:
T he /var/log/squid/access.log file logs all connections to the Squid server.
Q:
T he Red Hat Update Agent on the client systems does not connect through the RHN
Proxy Server. How can I resolve this error?
A:
Make sure that the latest version of the Red Hat Update Agent is installed on the client systems.
T he latest version contains features necessary to connect through an RHN Proxy Server. T he
latest version can be obtained through the Red Hat Network by issuing the command yum
update yum as root or from http://www.redhat.com/support/errata/.
T he RHN Proxy Server is an extension of Apache. See T able 6.1, “Log Files” for its log file location.
Q:
My RHN Proxy Server configuration does not work. Where do I begin troubleshooting it?
A:
Make sure /etc/sysconfig/rhn/system id is owned by root.apache with the permissions
0640.
Read the log files. A list is available at T able 6.1, “Log Files”.
6.4. General Problems
T o begin troubleshooting general problems, examine the log file or files related to the component
exhibiting failures. A useful exercise is to tail all log files and then run up2date --list. You should
then examine all new log entries for potential clues.
A common issue is full disk space. An almost sure sign of this is the appearance of halted writing in the
log files. If logging stops during a write, such as mid-word, you likely have filled disks. T o confirm this, run
this command and check the percentages in the Use% column:
df -h
In addition to log files, you can obtain valuable information by retrieving the status of your various
components. T his can be done for the Apache Web server and Squid.
T o obtain the status of the Apache Web server, run the command:
service httpd status
T o obtain the status of Squid, run the command:
service squid status
If the administrator is not getting email from the RHN Proxy Server, confirm the correct email addresses
24
Chapter 6. Troubleshooting
have been set for traceback_m ail in /etc/rhn/rhn.conf.
6.5. Host Not Found/Could Not Determine FQDN
Because RHN configuration files rely exclusively on fully qualified domain names (FQDN), it is imperative
that key applications are able to resolve the name of the RHN Proxy Server into an IP address. Red Hat
Update Agent, Red Hat Network Registration Client, and the Apache Web server are particularly prone to
this problem with the RHN applications issuing errors of "host not found" and the Web server stating
"Could not determine the server's fully qualified domain name" upon failing to start.
T his problem typically originates from the /etc/hosts file. You may confirm this by examining
/etc/nsswitch.conf, which defines the methods and the order by which domain names are resolved.
Usually, the /etc/hosts file is checked first, followed by Network Information Service (NIS) if used,
followed by DNS. One of these has to succeed for the Apache Web server to start and the RHN client
applications to work.
T o resolve this problem, identify the contents of the /etc/hosts file. It may look like this:
127.0.0.1 this_machine.example.com this_machine localhost.localdomain \
localhost
First, in a text editor, remove the offending machine information, like so:
127.0.0.1 localhost.localdomain.com localhost
T hen, save the file and attempt to re-run the RHN client applications or the Apache Web server. If they
still fail, explicitly identify the IP address of the Proxy in the file, such as:
127.0.0.1 localhost.localdomain.com localhost
123.45.67.8 this_machine.example.com this_machine
Replace the value here with the actual IP address of the Proxy. T his should resolve the problem. Keep in
mind, if the specific IP address is stipulated, the file will need to be updated when the machine obtains a
new address.
6.6. Connection Errors
If your are experiencing problems that you believe to be related to failed connections, follow these
measures:
Confirm the correct package:
rhn-org-httpd-ssl-key-pair-MACHINE_NAME-VER-REL.noarch.rpm
is installed on the RHN Proxy Server and the corresponding rhn-org-trusted-ssl-cert* .noarch.rpm or raw CA SSL public (client) certificate is installed on all client systems.
Verify the client systems are configured to use the appropriate certificate.
If using one or more RHN Proxy Servers, ensure each Proxy's SSL certificate is prepared correctly. If
using the RHN Proxy Server in conjunction with an RHN Satellite Server the Proxy should have both
its own server SSL key-pair and CA SSL public (client) certificate installed, since it will serve in both
capacities. Refer to the SSL Certificates chapter of the RHN Client Configuration Guide for specific
instructions.
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Red Hat Network Satellite 5.3 Proxy Installation Guide
If the RHN Proxy Server is connecting through an HT T P Proxy, make sure the URL listed is valid. For
instance, the HT T P Proxy URL field should not contain references to protocols, such as http:// or
https://. Only the hostname and port should be included in the form hostname:port, such as yourgateway.exam ple.com :8080.
Make sure client systems are not using firewalls of their own blocking required ports, as identified in
Section 2.4, “Additional Requirements”.
6.7. Caching Issues
If package delivery fails or an object appears to be corrupt, and it is not related to connection errors, you
should consider clearing the caches. T he RHN Proxy Server has two caches you should be concerned
with: one for Squid and the other for authentication.
T he Squid cache is located in /var/spool/squid/. T o clear it, stop the Apache Web server and
Squid, delete the contents of that directory, and restart both services. Issue these commands in this
order:
service httpd stop
service squid stop
rm -fv /var/spool/squid/*
service squid start
service httpd start
You may accomplish the same task more quickly by just clearing the directory and restarting squid, but
you will likely receive a number of RHN traceback messages.
T he internal caching mechanism used for authentication by the Proxy may also need its cache cleared.
T o do this, issue the following command:
rm -fv /var/cache/rhn/*
Although the RHN Authentication Daemon was deprecated with the release of RHN Proxy Server 3.2.2
and replaced with the aforementioned internal authentication caching mechanism, the daemon may still
be running on your Proxy. T o turn it off, issue the following individual commands in this order:
chkconfig --level 2345 rhn_auth_cache off service rhn_auth_cache stop
T o clear its cache, issue:
rm /var/up2date/rhn_auth_cache
If you must retain the RHN Authentication Daemon, which Red Hat recommends against and does not
support, note that its performance can suffer from verbose logging. For this reason, its logging (to
/var/log/rhn/rhn_auth_cache.log) is turned off by default. If you do run the daemon and desire
logging, turn it back on by adding the following line to the Proxy's /etc/rhn/rhn.conf file:
auth_cache.debug = 2
6.8. Proxy Debugging by Red Hat
If you've exhausted these troubleshooting steps or want to defer them to Red Hat Network
26
Chapter 6. Troubleshooting
professionals, Red Hat recommends that you take advantage of the strong support that comes with RHN
Proxy Server.
One way to access that expertise is through the Red Hat Knowledgebase, which provides solutions to
the most common issues encountered by users and has a robust browse and search interface for
finding the right answers to your Proxy issues. You can access the Red Hat Knowledgebase at
http://kbase.redhat.com.
Additionally, Red Hat provides a command line tool called the SoS Report, commonly known by its
command sosreport. T his tool collects your Proxy's configuration parameters, log files, and database
information and sends it directly to Red Hat.
T o use this tool for RHN Satellite Server information, you must have the sos package installed. T ype
sosreport -o rhn as root on the Satellite server to create a report. For example:
[[email protected] ~]# sosreport -o rhn
sosreport (version 1.7)
This utility will collect some detailed information about the
hardware and setup of your Red Hat Enterprise Linux system.
The information is collected and an archive is packaged under
/tmp, which you can send to a support representative.
Red Hat will use this information for diagnostic purposes ONLY
and it will be considered confidential information.
This process may take a while to complete.
No changes will be made to your system.
Press ENTER to continue, or CTRL-C to quit.
You are then prompted for your first initial and last name, then a support case number (also called an
Issue T racker number).
It may take several minutes for the system to generate and archive the report to a compressed file. Once
finished, email the new file from the /tm p/ directory to your Red Hat representative for immediate
diagnosis.
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Red Hat Network Satellite 5.3 Proxy Installation Guide
RHN Proxy Server Installation via Satellite Website
In addition to the installation method outlined in Section 4.2, “RHN Proxy Server Installation Process”, you
can also install RHN Proxy Server via the RHN Satellite Server website.
Warning
T his method of installation has been deprecated and may be removed in a future version of RHN
Satellite Server. T he recommended installation method is documented at Section 4.2, “RHN Proxy
Server Installation Process”.
1. Register the newly-installed Red Hat Enterprise Linux AS system with Red Hat Network (either the
central RHN Servers or your RHN Satellite Server) using the organizational account containing the
RHN Proxy Server entitlement with the command: rhn_register.
2. Grant the system a Provisioning entitlement. Visit the RHN Website (or the fully qualified domain
name of the Satellite serving the Proxy), login as the Organization Administrator, and navigate to
the Your RHN => Subscription Managem ent page. Check the box of system on which the
RHN Proxy Server is to be installed, select Provisioning from the drop-down box, and click the Add
Entitlem ent button.
3. Ensure that the system is subscribed to the Red Hat Network T ools channel for its base
operating system by clicking the name of the system and navigating to the System => System
Details page. Under the Subscribed Channels section, check the listed channels for the
T ools channel. If not subscribed to this channel, click the Alter Channel Subscriptions
link, check the box next to the tools channel, and then click the Change Subscriptions button
to confirm your choice.
4. Install the rhncfg-actions package (which also installs the rhncfg and rhncfg-client
packages as dependencies) by first navigating to the System => System Details => Software =>
Packages => Install subtab. Next, search for rhncfg-actions using the Filter by Package
Nam e text search box. In the resulting list, select the rhncfg-actions package and install it.
5. If you will be enabling secure sockets layer (SSL) encryption on the Proxy and connecting to the
central RHN Servers, install the rhns-certs-tools package from the same Red Hat Network
T ools channel and use the RHN SSL Maintenance T ool to generate the tar file required later.
Refer to the SSL Certificates chapter of the RHN Client Configuration Guide for instructions.
If you will be enabling SSL encryption on the Proxy and connecting to an RHN Satellite Server or
another RHN Proxy Server with SSL, you will also need the CA certificate password used for the
parent system.
6. Log into the system through a terminal as root and run the rhn_check command to immediately
initiate the scheduled package installation.
7. Once the packages have been installed, as confirmed through the System Details =>
Events tab, prepare the system to accept remote commands and configuration management with
the following command:
/usr/bin/rhn-actions-control --enable-all
8. Within the RHN website, navigate to the System Details => Details => Proxy subtab.
28
RHN Proxy Server Installation via Satellite Website
Warning
Please note that the RHN Proxy Server installation may replace the squid.conf and
httpd.conf configuration files on the system to ease upgrades later. If you have edited
these files and want to preserve them, they are rotated in place and can be retrieved after
installation.
Figure A.1. System Details => Proxy
9. In the System Details => Details => Proxy subtab, the pulldown menu should indicate
your ability to activate the system as an RHN Proxy Server. Ensure that the correct version is
selected and click the Activate Proxy button. T he Welcom e page of the installation appears.
Figure A.2. Welcome
29
Red Hat Network Satellite 5.3 Proxy Installation Guide
10. In the Welcom e page, you will find notification of any requirements not met by the system. When
the system is ready, a continue link appears. Click it to go to the T erm s & Conditions page.
Figure A.3. T erms & Conditions
11. In the T erm s & Conditions page, click the term s and conditions link to view the
licensing agreement of the RHN Proxy Server. When satisfied, click the I agree link. You must
agree in order to continue with the installation. For Proxies that register to a Satellite and have
Monitoring enabled, the Enable Monitoring page appears next.
Figure A.4 . Enable Monitoring
12. In the Enable Monitoring page, you must decide whether the Proxy will be used to monitor
systems served by it. For this to take place, the RHN Proxy Server must meet the requirements
30
RHN Proxy Server Installation via Satellite Website
identified in Chapter 2, Requirements and must be connected to an RHN Satellite Server (or
another Proxy connected to a Satellite). T o enable monitoring on the Proxy, select the checkbox
and click continue. T he Configure RHN Proxy Server page appears.
Figure A.5. Configure RHN Proxy Server
13. In the Configure RHN Proxy Server page, provide or confirm the entries for all required
fields. T he Administrator Email Address will receive all mail generated by the Proxy, including
sometimes large quantities of error-related tracebacks. T o stem this flow, consider establishing
mail filters that capture messages with a subject of "RHN T RACEBACK from hostname". T o list
more than one administrator, enter a comma-separated list of email addresses.
T he RHN Proxy Hostname is the fully qualified domain name (FQDN) of the RHN Proxy Server.
T he RHN Parent Server is the domain name of the server serving the Proxy — either the central
RHN servers, another RHN Proxy Server or an RHN Satellite Server. T o connect to the central
RHN servers, include the value xm lrpc.rhn.redhat.com . T o connect to a Satellite or another
Proxy, enter the parent system's FQDN.
If the RHN Proxy Server will connect through an HT T P proxy, configure it using the associated
fields. Note that references to protocol, such as http:// or https:// should not be included in
the HT T P Proxy Server field. Insert only the hostname and port in the form hostname:port,
such as your-gateway.exam ple.com :3128.
Tip
T he installation process affects only the Proxy configuration file: /etc/rhn/rhn.conf.
T he Red Hat Update Agent (up2date) configuration file,
/etc/sysconfig/rhn/up2date, must be updated manually to receive its updates from
another server, such as an RHN Satellite Server.
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Red Hat Network Satellite 5.3 Proxy Installation Guide
Finally, you must decide whether to enable SSL using the checkbox at the bottom. Red Hat
strongly recommends that you employ this level of encryption for all traffic to and from the RHN
Proxy Server. T o select it, however, you must connect to the central RHN Servers (which have SSL
enabled by default) or to an RHN Satellite Server or RHN Proxy Server that has SSL enabled.
Connection to the central RHN Servers requires upload of the certificate tar file mentioned earlier.
Connection to a Satellite or another Proxy through SSL requires the CA certificate password used
in enabling SSL on the parent system.
Note
Refer to the chapter entitled "SSL Infrastructure" in the Red Hat Network Client
Configuration Guide for more information about configuring a secure RHN Proxy Server
infrastructure using SSL.
If you choose not to enable SSL during installation, leave this box unchecked and refer to the SSL
Certificates chapter of the RHN Client Configuration Guide to learn how to obtain this level of
security post install. When finished, click continue. If you enabled SSL and are connecting to a
Satellite, the Configure SSL page appears. If you enabled SSL and are connecting to another
Proxy or the central RHN servers, the Upload SSL page appears. If you did not enable SSL but
did enable Monitoring, skip to the description of the Configure Monitoring page. If you did
not enable SSL or Monitoring, skip to the description of the Install Progress page.
Figure A.6. Configure SSL
14. In the Configure SSL page applicable only to a Proxy connecting to an RHN Satellite Server
with SSL enabled, provide the information needed to generate the server certificate. T he most
important item is the CA certificate password, which must match the password used while
enabling SSL on the parent server. T he remaining fields may match the parent server's values but
can differ depending on the role of the RHN Proxy Server, for instance reflecting a different
geographic location. Similarly, the email address may be the same one provided earlier for the
Proxy administrator, but may instead be directed to a particular certificate administrator. Certificate
expiration is configurable. As always, ensure that the values provided here exist in the backups of
information described in Chapter 2, Requirements. Once finished, click continue.
32
RHN Proxy Server Installation via Satellite Website
Figure A.7. Configure Monitoring
15. In the Configure Monitoring page, provide or confirm the hostname and IP address of the
parent server connected to by the RHN Proxy Server. T his must be either an RHN Satellite Server
or another Proxy which is in turn connected to a Satellite. You cannot achieve Monitoring through
the central RHN Servers. When finished, click continue. T he Install Progress page
appears.
Figure A.8. Install Progress
16. In the Install Progress page, you may monitor the steps of the installation as they take place.
Click the link to any step to go to its Action Details page. When an action begins, its status
goes from Queued to Picked Up and then finally to Com pleted. Like the earlier package
installs, you can immediately trigger these steps by running the rhn_check command in a
terminal on the system as root. When finished, the Install Progress page will display the
message T he installation is com plete. You may now begin registering systems to be
served by the RHN Proxy Server. Refer to the RHN Client Configuration Guide.
17. When all items on the Install Progress page are Com pleted, the Proxy is ready for use.
You can now register systems to RHN through the Proxy.
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Red Hat Network Satellite 5.3 Proxy Installation Guide
Sample RHN Proxy Server Configuration File
T he /etc/rhn/rhn.conf configuration file for the RHN Proxy Server provides a means for you to
establish key settings. Be warned, however, that errors inserted into this file may cause Proxy failures.
Make configuration changes with caution.
If you are also using an RHN Satellite Server, you should be particularly concerned with the following
parameters: traceback_mail and proxy.rhn_parent. Review the sample and its comments (beginning with
a hash mark #), for additional details.
Note
You may add the use_ssl setting to rhn.conf for testing purposes only. Set its value to 0 to
turn off SSL between the Proxy and the upstream server temporarily. Note that this greatly
compromises security. Return the setting to its default value of 1 to re-enable SSL, or simply
remove the line from the configuration file.
# Automatically generated RHN Management Proxy Server configuration file.
# ------------------------------------------------------------------------# SSL CA certificate location
proxy.ca_chain = /usr/share/rhn/RHNS-CA-CERT
# Corporate HTTP proxy, format: corp_gateway.example.com:8080
proxy.http_proxy =
# Password for that corporate HTTP proxy
proxy.http_proxy_password =
# Username for that corporate HTTP proxy
proxy.http_proxy_username =
# Location of locally built, custom packages
proxy.pkg_dir = /var/spool/rhn-proxy
# Hostname of RHN Server or RHN Satellite
proxy.rhn_parent = rhn.redhat.com
# Destination of all tracebacks, etc.
traceback_mail = [email protected], [email protected]
34
Revision History
Revision History
Revision 5.3-18.4 00
Rebuild with publican 4.0.0
2013-10-31
Rüdiger Landmann
Revision 5.3-18
Rebuild for Publican 3.0
2012-07-18
Anthony T owns
Revision 1.0-0
Fri Feb 27 2009
Index
A
additional requirements, Additional Requirements
advantages, RHN Proxy Server
authentication, How it Works
authentication caching
- clearing, Caching Issues
C
caching issues, Caching Issues
channel, T erms to Understand
- creating a private channel, Creating a Private Channel
Channel Adminstrator, T erms to Understand
client configuration
- subscribe to private channel, Uploading Packages
connection errors, Connection Errors
D
disk space requirements, Disk Space Requirements
G
general problems, General Problems
H
hardware requirements, Hardware Requirements
host now found error
- could not determine FQDN, Host Not Found/Could Not Determine FQDN
how it works, How it Works
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Red Hat Network Satellite 5.3 Proxy Installation Guide
HT T P Proxy Caching Server
- disk space requirements, Disk Space Requirements
I
inbound ports, satellite
- 5222, Additional Requirements
installation
- base, Base Install
- of RHN Proxy Server, RHN Proxy Server Installation Process
- Satellite website, RHN Proxy Server Installation via Satellite Website
L
log files, Log Files
O
Organization Administrator, T erms to Understand
outbound ports
- 80, 443, Additional Requirements
P
port
- 443, Additional Requirements
- 5222, Additional Requirements
- 80, Additional Requirements
port 4 4 3, Additional Requirements
port 4 54 5, Additional Requirements
port 80, Additional Requirements
private channel, Creating a Private Channel
Proxy Ports, Additional Requirements
Q
questions and answers, Questions and Answers
R
Red Hat Network
- introduction, Red Hat Network
Red Hat Update Agent, T erms to Understand, How it Works
36
Revision History
requirements, Requirements
- additional, Additional Requirements
- disk space, Disk Space Requirements
- hardware, Hardware Requirements
- software, Software Requirements
RHN Authentication Daemon, disabling
- rhn_auth_cache, stopping, Caching Issues
RHN Package Manager, How it Works, RHN Package Manager
- channels, specifying, Uploading Packages
- command line options, Command Line Options
- configuration file, RHN Package Manager
- configuring, Creating a Private Channel
- create private channel, Creating a Private Channel
- installing, RHN Package Manager
- upload package headers, Uploading Packages
- verify local package list, Uploading Packages
rhn-proxy
- service, Managing the Proxy Service
rhn.conf
- sample file, Sample RHN Proxy Server Configuration File
rhn_package_manager , Uploading Packages (see RHN Package Manager)
S
satellite-debug, Proxy Debugging by Red Hat
software requirements, Software Requirements
squid caching, Caching Issues
T
terms to understand, T erms to Understand
topologies, Example T opologies
- multiple proxies horizontally tiered, Multiple Proxy Horizontally T iered T opology
- multiple proxies vertically tiered, Multiple Proxy Vertically T iered T opology
- proxies with RHN Satellite Server, Proxies with RHN Satellite Server
- single proxy, Single Proxy T opology
traceback, T erms to Understand
troubleshooting, T roubleshooting
37
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