I am trying to gently migrate a 3-node cluster from centos5 to RHEL6. I have already taken one of the three nodes out and rebuilt it. My thinking is to build a new cluster from the RHEL node but want to run it by everyone here first. The cluster consists of a handful of NFS volumes and a PostgreSQL database. I am not concerned about the database. I am moving to a new version and will simply migrate that. I am more concerned about all of the ext4 clustered LVM volumes. In this process, if I shut down the old cluster, what's the process to force the new node to read those volumes in to the new single-node cluster? A pvscan on the new server shows all of the volumes fine. I am concerned there's something else I'll have to do here to begin mounting these volumes in the new cluster.
[root@server ~]# pvdisplay
Skipping clustered volume group vg_data01b
Thanks!
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