HP Serviceguard Guidelines for Migrating a Cluster with Cold Install, Checklist for Migration

CAUTION: You must reboot all the nodes from their original disks before restarting the cluster; do not try to restart the cluster with some nodes booted from the upgraded disks and some booted from the pre-upgrade disks.

Guidelines for Migrating a Cluster with Cold Install

There may be circumstances when you prefer to do a cold install of the HP-UX operating system rather than an upgrade. A cold install erases the existing operating system and data and then installs the new operating system and software; you must then restore the data.

CAUTION: The cold install process erases the existing software, operating system, and data. If you want to retain any existing software, make sure you back up that software before migrating.

Checklist for Migration

Use the following as a checklist to prepare the migration.

CAUTION: This is a checklist, not a precise set of steps.

1.Back up the data, including databases, user and application data, volume group configurations, etc.

NOTE: Data on shared disks, or on local disks in volumes that are not are touched by the HP-UX installation process, will not normally be erased by the cold install; you can re-import this data after the cold install. If you intend to do this, you must do the following before you do the cold install:

•For LVM: create a map file for each LVM volume group and save it as part of your backup.

•For VxVM: deport disk groups (halting the package should do this).

See “Creating the Storage Infrastructure and file systems with LVM, VxVM and CVM” (page 177) for more information.

2.Halt the cluster applications, and then halt the cluster.

3.Do a cold install of the HP-UX operating system. For more information on the cold install process, see the HP-UX Installation and Update Guide for the target version of HP-UX at http:// www.hp.com/go/hpux-core-docs.

4.Install any additional required software that did not come with your version of the HP-UX Operating Environment.

5.Install Serviceguard. The Serviceguard version must be compatible with the version of HP-UX installed in item 3 of this list. See the Serviceguard/SGeRAC/SMS/Serviceguard Manager Plug-in Compatibility and Feature Matrix, at http://www.hp.com/go/hpux-serviceguard-docs.

6.Recreate any user accounts needed for the cluster applications.

7.Recreate the cluster as described in Chapter 5: “Building an HA Cluster Configuration” (page 158).

8.Restart the cluster.

9.Reinstall the applications.

10.Restore or re-import the data.

11.Recreate and run the cluster packages as described in Chapter 6: “Configuring Packages and Their Services ” (page 227).

368 Software Upgrades