[ovirt-users] Migrating oVirt cluster from 4.0 to 4.1

[Tomas Jelinek]

On Mon, Jun 12, 2017 at 2:12 PM, Pavel Gashev <Pax at acronis.com> wrote:

> Can I update VMs compatibility version without restarting VMs?
>

yes, but it will be applied only after restart.


>
>
> According to the source code, restarting is required during upgrading to
> 4.1 only if a VM uses random generator device. If it doesn’t, a restart is
> not really required.
>

right, but the VM will still be marked with this "next run configuration"
and will be set to have the old compatibility version.


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> *From: *<users-bounces at ovirt.org> on behalf of Tomas Jelinek <
> tjelinek at redhat.com>
> *Date: *Monday, 12 June 2017 at 14:15
> *To: *James <james at jloh.co>
> *Cc: *users <users at ovirt.org>
> *Subject: *Re: [ovirt-users] Migrating oVirt cluster from 4.0 to 4.1
>
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> On Mon, Jun 12, 2017 at 12:17 PM, James <james at jloh.co> wrote:
>
> We recently moved our oVirt cluster from 4.0 to 4.1 and have migrated
> all the hosts. The datacenter currently has a compatability setting of
> 4.1 but the cluster is still on 4.0. As cross-cluster migrations has
> been removed (no option anymore?) we aren't 100% sure how to get the
> cluster onto 4.1 whilst keeping the VMs online. Do we just change the
> compatibility version live and it "just works" or do we have to have
> downtime?
>
>
>
> yes, you just change the compatibility version. The VMs which are down
> will be automatically updated and work with the new cluster, the running
> ones will be marked with a "triangle" icon and will be automatically
> updated on restart of them.
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> Any info would be great!
>
> Regards,
> James
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