Building Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access EVA P6000 for Linux B.01.00.00

Rolling upgrade
Metrocluster configurations follow the HP Serviceguard rolling upgrade procedure. The HP
Serviceguard documentation includes rolling upgrade procedures to upgrade the Serviceguard
version, operating environment, and other software. This Serviceguard procedure, along with
recommendations, guidelines, and limitations, is applicable to Metrocluster versions. For more
information on completing a rolling upgrade of HP Serviceguard, see the latest edition of Managing
HP Serviceguard A.11.20.10 for Linux, available at http://www.hp.com/go/
linux-serviceguard-docs.
Upgrading Metrocluster replication software
To perform a rolling upgrade of Metrocluster software:
1. Disable package switching for all Metrocluster packages.
2. Install the new Metrocluster software on all nodes.
3. Enable package switching for all Metrocluster packages.
To upgrade the array-specific replication management software, see “Upgrading replication
management software” (page 33).
Limitations of the rolling upgrade for Metrocluster
The following are the limitations of the rolling upgrade for Metrocluster:
• The cluster or package configuration cannot be modified until the rolling upgrade is complete.
If the configuration must be edited, upgrade all nodes to the new release, and then modify
the configuration file and copy it to all nodes in the cluster.
• New features of the latest version of Metrocluster cannot be used until all nodes are upgraded
to the latest version.
• More than two versions of Metrocluster cannot run in the cluster while the rolling upgrade is
in progress.
• The rolling upgrade procedure cannot be used as a means of using multiple versions of
Metrocluster software within the cluster. HP recommends that all cluster nodes are immediately
upgraded to the latest version.
• HP Serviceguard cannot be deleted on any node when the rolling upgrade is in progress in
the cluster.
Upgrading replication management software
Upgrade the replication management software that is used by Metrocluster. In this product, the
array management softwares are running in a separate windows box, therefore you can upgrade
them independently without affecting the running Metrocluster.
Upgrading the OpenPegasus WBEM Services for Metrocluster with Continuous Access EVA P6000
for Linux
Metrocluster with Continuous Access EVA P6000 for Linux uses OpenPegasus WBEM Services
software to communicate with the SMI-S server that manages the P6000/EVA disk arrays. You
can update OpenPegasus WBEM Services without halting the cluster or Metrocluster packages on
any of the nodes. Metrocluster communicates with this software when the Metrocluster packages
are starting up. Therefore, avoid Metrocluster package failover until all the nodes in the Metrocluster
are upgraded to the same version of OpenPegasus WBEM Services.
Rolling upgrade 33