HP XC System Software Installation Guide Version 4.0

9 Upgrading to HP XC System Software Version 4.0
This chapter describes how to upgrade an existing HP XC system to Version 4.0. You must
complete these tasks in the following order:
1. “Preparing for the Upgrade” (page 139)
2. “Preparing the System State” (page 141)
3. “Installing the Upgrade RPM and Preparing the System” (page 142)
4. “Upgrading Linux and HP XC RPMs” (page 143)
5. “Viewing the Results of the RPM Upgrade” (page 145)
6. “Installing Patches and Reinstalling Additional Software” (page 146)
7. “Manually Merging File Customizations” (page 146)
8. “Configuring the System and Propagating the Golden Image” (page 148)
9. “Imaging and Booting the System and Starting Compute Resources” (page 152)
10. “Starting Availability Tools After the Upgrade” (page 153)
11. “Verifying the Upgrade” (page 154)
9.1 Software Upgrade Overview
A software upgrade to HP XC System Software Version 4.0 installs new versions of Linux and
HP XC RPMs on the current system.
The HP XC software upgrade process begins on the head node and is based on the Anaconda
Kickstart automated installation process; all tasks are performed by the root user on the head
node. The HP XC DVD software distribution contains a bootable image and an embedded
ks_upgrade.cfg Kickstart upgrade file, which is accessed on the DVD when you start the
upgrade.
As part of the upgrade process, the cluster_config utility re-creates the golden image on the
head node, and the head node represents the configuration from which all other nodes are
upgraded and reimaged.
This section also provides information about the following topics:
• “Supported Upgrade Paths” (page 137)
• “Is Upgrading Appropriate for Your System Configuration?” (page 138)
• “Upgrade Characteristics” (page 138)
• “Upgrade Commands” (page 139)
• “Upgrading Existing HP XC Version 3.n Clusters With SFS to HP XC Version 4.0” (page 139)
9.1.1 Supported Upgrade Paths
Table 9-1 lists the supported upgrade paths to HP XC System Software Version 4.0.
Table 9-1 Supported Upgrade Paths
Is an Upgrade to Version 4.0
Supported?Installed Version of HP XC System Software
NoVersion 3.1 or earlier
YesVersion 3.2
YesVersion 3.2.1
9.1 Software Upgrade Overview 137