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

[Itamar Heim]

On 10/03/2012 04:17 PM, Neil wrote:
> On Wed, Oct 3, 2012 at 4:06 PM, Itamar Heim <iheim at redhat.com> 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 at redhat.com> 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?
>

if you upgrade it the DC should be preserved.
juan - i remember there was a specific issue around upgrade to check, 
but don't remember if was handled or not?