Consider the following points when you plan the use of Network File System (NFS) in a Sun Cluster configuration.
No Sun Cluster node can be an NFS client of a Sun Cluster HA for NFS-exported file system being mastered on a node in the same cluster. Such cross-mounting of Sun Cluster HA for NFS is prohibited. Use the cluster file system to share files among cluster nodes.
Applications that run locally on the cluster must not lock files on a file system that is exported through NFS. Otherwise, local blocking (for example, flock(3UCB) or fcntl(2)) might interfere with the ability to restart the lock manager ( lockd(1M)). During restart, a blocked local process might be granted a lock which might be intended to be reclaimed by a remote client. This would cause unpredictable behavior.
Sun Cluster software does not support the following options of the share_nfs(1M) command:
However, Sun Cluster software does support the following security features for NFS:
The use of secure ports for NFS. You enable secure ports for NFS by adding the entry set nfssrv:nfs_portmon=1 to the /etc/system file on cluster nodes.
The use of Kerberos with NFS. For more information, see Securing Sun Cluster HA for NFS With Kerberos V5 in Sun Cluster Data Service for NFS Guide for Solaris OS.