[Linux-cluster] centos5 to RHEL6 migration

Michael Allen michael.allen at visi.com
Mon Jan 9 01:36:10 UTC 2012

On Sun, 8 Jan 2012 17:39:37 -0600
Terry <td3201 at gmail.com> wrote:

> Hello,
> 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 at server
> ~]# pvdisplay Skipping clustered volume group vg_data01b
> Thanks!
This message comes at a good time for me, too, since I am considering
the same thing.  I have 10 nodes but it appears that a change to CentOS
6.xx is about due.

Michael Allen

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