I'm saw something similar on a test cluster on CentOS 8.3.
You can take it out of global maintenance mode by navigating the engine UI
to edit cluster -> scheduling policy and turn off global maintenance there.

Not sure what else is going on.  It wants me to put all three hosts into
maintenance mode which is impossible.


On Sat, May 22, 2021 at 8:36 PM David White via Users <users@ovirt.org>
wrote:

> I have a 3-node hyperconverged cluster with Gluster filesystem running on
> RHEL 8.3 hosts.
>
> It's been stable on oVirt 4.5.
> Today, I just upgraded the Engine to v4.6.
>
> [image: Screenshot from 2021-05-22 20-29-23.png]
>
> I then logged into the oVirt manager, navigated to Compute -> Clusters,
> and clicked on Upgrade.
> The Status of the cluster does have an exclamation mark that says "Upgrade
> Cluster Compatibility Level", but my understanding is, I shouldn't do that
> until all 3 of my hosts have been upgraded.
>
> Looking at active tasks, I see that the first host in my cluster is stuck
> in "Upgrading".
> It's now been like this for 3 hours, without any visible progress.
>
> If I try to launch a VM that is not configured for high availability, the
> VM fails to launch, and I get a message about the cluster being in
> "Maintenance Mode" and that none of the hosts satisfies current scheduling
> restraints.
> How do I....
> a) Cancel / clear the upgrade and take the cluster out of "maintenance
> mode"
> b) Properly upgrade the cluster, since clicking the "Upgrade" button
> clearly didn't work?
>
> Thanks,
> David
>
>
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