I’ve also faced this issue, which is surprising since I used an ovirt node download for 4.4.

How did you resolve it? How can you upgrade to CentOS 8.3 or downgrade the cluster?

Thanks,

Chris.

From: Ritesh Chikatwar <rchikatw@redhat.com>
Sent: 12 November 2020 05:10
To: shadow emy <shadow.emy1@gmail.com>
Cc: users <users@ovirt.org>
Subject: [ovirt-users] Re: Cluster compatibility version 4.5 on oVirt 4.4

Hello,

To upgrade to cluster 4.5 you need a 8.3 host.

I guess still CentOS 8.3 is not available. I am not sure on CentOS 8.3 availability.

If it's available please make sure your host is upgraded to 8.3 .

On Thu, Nov 12, 2020, 5:38 AM shadow emy <shadow.emy1@gmail.com> wrote:

Just to confirm i face similar problem.
Yes i saw that  warning too :  "Upgrade Cluster Compatibility Level"   to upgrade the Cluster to version 4.5.
Though when i try to do that there are a lot of errors.

In GUI :

Error while executing action: Cannot change Cluster Compatibility Version to higher version when there are active Hosts with lower version.
-Please move Host host1, host2, host3  with lower version to maintenance first.

In engine.log :

WARN  [org.ovirt.engine.core.bll.UpdateClusterCommand] (default task-163) [2c681b74-8666-4f2f-b2e0-6b20e98f417e] Validation of action 'UpdateCluster' failed for user admin@internal-authz. Reasons: VAR__TYPE__CLUSTER,VAR__ACTION__UPDATE,$host host1, host2, host3,CLUSTER_CANNOT_UPDATE_COMPATIBILITY_VERSION_WITH_LOWER_HOSTS

I did not find any documentation for 4.5 cluster compatibility,  so i like as well to understand why is that option present there.
It will be used when ovirt 4.5.x will be released ?

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