Re: [Users] fw: Migrating ovirt-engine to new server

On Wed, Oct 3, 2012 at 4:06 PM, Itamar Heim <iheim(a)redhat.com&gt; wrote: > On 10/03/2012 04:04 PM, Neil wrote: >> >> Thanks for coming back to me. >> >> On Wed, Oct 3, 2012 at 4:00 PM, Itamar Heim <iheim(a)redhat.com&gt; wrote: >> >>> do you need to keep the VMs, or just move the LUNs to create a new one? >>> if you just want to create a new one, you just need to clear the LUNs (DD >>> over them) so engine will let you use them (or remove them from first >>> engine >>> which will format them for same end goal. >> >> >> I need to keep the VM's unfortunately. >> Logically speaking all I need to do is detach the main data domain >> from one ovirt-engine and re-attach it to the new ovirt-engine. > > sadly, not that easy yet (though just discussed today the need to push this > feature). > > easiest would be to export them to an nfs export domain, re-purpose the > LUNs, and import to the new system. > > if not feasible, need to hack a bit probably. Oh crumbs! I thought that was wishful thinking though :) Exporting the VM's to NFS will take too long due to the total size being 4TB and the VM's are a mail, proxy and pdc servers so getting that much downtime won't be possible. Is attempting the upgrade path(http://wiki.ovirt.org/wiki/OVirt_3.0_to_3.1_upgrade) again my only option then? Even if I manage to get the "upgrade" working will I still need to export/import the VM's via NFS or will the datacentre move across once it can be detached?