Combining NFS with PowerHA we can achieve a HANFS (Highly Available Network File System). The basic concept behind this solution is that one node in the cluster mounts the resource locally, and offers that as an exported resource via a serviceable IP. Another node in the cluster is then configured to take on the resource in the event of failure.
If you’re following this, I’m taking the assumption that your cluster is already configured, you have a working IP network and have set up a shared volume group between the cluster nodes that will be handling the HANFS failover. Before we get started though, there are a few things which need to be installed/verified.