Migrating oVirt cluster from 4.0 to 4.1
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? Any info would be great! Regards, James
On Mon, Jun 12, 2017 at 12:17 PM, James <james@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.
Any info would be great!
Regards, James _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
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--_000_3033D2FFCEBD4966A4628DFBD6402C6Facroniscom_--
On Mon, Jun 12, 2017 at 2:12 PM, Pavel Gashev <Pax@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.
*From: *<users-bounces@ovirt.org> on behalf of Tomas Jelinek < tjelinek@redhat.com> *Date: *Monday, 12 June 2017 at 14:15 *To: *James <james@jloh.co> *Cc: *users <users@ovirt.org> *Subject: *Re: [ovirt-users] Migrating oVirt cluster from 4.0 to 4.1
On Mon, Jun 12, 2017 at 12:17 PM, James <james@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.
Any info would be great!
Regards, James _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
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PC9kaXY+DQo8L2Rpdj4NCjwvYm9keT4NCjwvaHRtbD4NCg== --_000_BE515DFCA9664AC095CCB29900ED64D9acroniscom_--
On Mon, Jun 12, 2017 at 6:30 PM, Pavel Gashev <Pax@acronis.com> wrote:
Tomas,
Since the restart is not actually required in my case, what if I set compatibility version in the DB directly to make the engine happy?
that's a nasty hack...
I have no plans to restart my VMs in this year. And I don’t want to block online updating of VM parameters by the “next run configuration”.
By online updating you mean hotplug? Or just normal update of fields which don't need restart (like description)? Because both are possible even with a next run snapshot.
*From: *Tomas Jelinek <tjelinek@redhat.com> *Date: *Monday, 12 June 2017 at 16:42 *To: *Pavel Gashev <Pax@acronis.com> *Cc: *James <james@jloh.co>, users <users@ovirt.org>
*Subject: *Re: [ovirt-users] Migrating oVirt cluster from 4.0 to 4.1
On Mon, Jun 12, 2017 at 2:12 PM, Pavel Gashev <Pax@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.
*From: *<users-bounces@ovirt.org> on behalf of Tomas Jelinek < tjelinek@redhat.com> *Date: *Monday, 12 June 2017 at 14:15 *To: *James <james@jloh.co> *Cc: *users <users@ovirt.org> *Subject: *Re: [ovirt-users] Migrating oVirt cluster from 4.0 to 4.1
On Mon, Jun 12, 2017 at 12:17 PM, James <james@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.
Any info would be great!
Regards, James _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
participants (3)
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James -
Pavel Gashev -
Tomas Jelinek