Boris Epstein borepstein@gmail.com wrote:
We are currently running a NFS-based server centric setup. I would like to set up something where I can easily have more than one redundant server, security/authentication
Have you considered an NFS cluster based on pacemaker/openais/corosync? See http://www.clusterlabs.org/. One possible config is an active/passive cluster using NFS on top of DRBD. I've never clustered samba, but it looks like others have done it: http://dev.gentoo.org/~wschlich/src/sys-cluster/heartbeat-scripts-4/ocf-ra/samba
Google will show you various problems with active/active clusters related to both GFS2 and samba. Don't try to have your NFS servers also be NFS clients.
For reasonable security/authentication, you'd probably want to integrate with kerberos.
Devin