To update the cluster software while minimizing service downtime, follow these steps:
Stop the cluster software on the first member to be upgraded by clicking Cluster => Stop Local Cluster Daemons from the Cluster Status Tool. Alternatively, run the following command at a shell prompt:
/sbin/service clumanager stop |
Make a copy of the cluster configuration file. For example, to save the file to the /root directory, run the following command:
cp /etc/cluster.xml /root/ |
Upgrade the cluster packages using the steps outlined in Section 3.1 Installing the Red Hat Cluster Suite Packages.
Copy the configuration file you saved back to the /etc/ directory.
cp /root/cluster.xml /etc/ |
Start the cluster software on the updated cluster system by clicking Cluster => Start Local Cluster Daemons from the Cluster Status Tool. Alternatively, run the following command at a shell prompt:
/sbin/service clumanager start |
Repeat steps 1 - 5 for each cluster member to be updated.