[ovirt-users] Downgrade ovirt-engine 3.6 to 3.5

[Yedidyah Bar David]

On Tue, May 24, 2016 at 9:47 AM, Nicolas Ecarnot <nicolas at ecarnot.net> wrote:
> Le 24/05/2016 08:36, Sandvik Agustin a écrit :
>>
>> Hi,
>>
>> thanks for the quick reply, i have export domain already running and
>> attached to ovirt 3.6.
>>
>> co'z i have 3 hypervisor, 2 are running centos 6.7
>
>
> No one could resist asking you why you wouldn't upgrade those two hosts to
> centos 7 ...

I think I can - because in 3.6 we do not support migrating VMs across clusters
from el6 to el7, while in 3.5 we did. Not sure exactly why, but this was the
reason for doing this migration in 3.5 for hosted-engine upgrade [1].

You might be able to move the VMs to the el7 cluster while they are down.
Still requires downtime, but less than export/import.

[1] https://www.ovirt.org/documentation/how-to/hosted-engine-host-OS-upgrade/

>
>
>> , 1 is running centos
>> 7, i don't have any problem at this moment, but i want them to be in the
>> same cluster, the 2 centos 6.7 are in the same cluster but i'm unable to
>> add the host running centos 7 on that cluster, so what i did is create
>> another cluster and add this host centos 7 on the new cluster.
>>
>> I just want them 3 host in the same cluster. :)
>>
>> TIA
>
>
> --
> Nicolas ECARNOT
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-- 
Didi