I have setup a server (CentOS) on which I have connected to several LUNs from a SAN via iSCSI then multipath, resulting in multiple physical volumes I can use for LVM (dm1 ...). From the file server, I have then used these physical volumes to setup two logical volumes which I then serve to a cluster via NFS.
Now, the capacity on the SAN is already subject to regular off-site backup so I am not worried about losing data.
My question is, should any information on the NFS file server be backed up as well? For example, in the event that the file server fails, what information regarding LVM should I retain to facilitate re-initialization of the LVM filesystem? For example, the contents of
/etc/lvm/? I am perusing the LVM documentation from RedHat, but it is quite general and I would appreciate insight into the specific case above.
Thanks you in advance for your help.