Updating a SLES11 Cluster to the latest Service Pack

This document (7007261) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 11
SUSE Linux Enterprise Server 11 Service Pack 1
SUSE Linux Enterprise High Availability Extension 11 Service Pack 2

Situation

An existing SLES 11 HAE Cluster should be updated to SLES11 SP1 HAE or an existing SLES 11 SP1 HAE Cluster should be updated to SLES11 SP2 HAE with the least downtime possible.

Resolution

The technical process of updating is described in TID 7005410 - How to upgrade to SLES/SLED 11 SP1


Further consideration is the behaviour of the cluster itself. As the SLES11 HAE cluster stack is for High Availability the failure of one cluster node won't affect the other machines. To use this the following process should be followed on each node,  one after the other:


1. Disable the cluster service in the runlevel on a node


   insserv -r openais


to ensure, that if anything goes wrong on this node during the update no unhealthy node tries to rejoin the cluster

2. Move all cluster resources away from this node by putting this node into standby, for example via commandline:

   crm node standby NODE_NAME


3. Stop the cluster service on a node


   rcopenais stop


If the stop fails the machine can also be stopped or rebooted at this stage as it won't rejoin the cluster.


4. Update the Software as described in the TID linked above.


5. Reboot the node.


6. Start the cluster service on this node.


   rcopenais start


7. Allow cluster resources back onto this node by making it online in the cluster again, for example via commandline:

   crm node online NODE_NAME


8. Add cluster service to runlevel:


   insserv openais


Repeat process as outlined above for each and every node consecutively.


Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7007261
  • Creation Date: 25-Nov-2010
  • Modified Date:03-Mar-2020
    • SUSE Linux Enterprise High Availability Extension
    • SUSE Linux Enterprise Server

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