I should have pointed out that in my case the hosted engine failed to install. After the Local VM came up the host was marked as non-operational because the cluster (which I had given a custom name via ansible input) was set to compatibility 4.5 and was not changeable. No idea why the cluster was created at 4.5 if that is not supposed to be available yet or marked for some sort of future release. This caused the host to be non-operational with a warning that the “host” needed upgrading, so perhaps it’s a slightly different issue to that faced below.

If you have faced this issue though I would appreciated some advice on how to resolve it. I noticed the default cluster was marked as 4.4. My plan is therefore to re-install the hosted engine and use the “Default” datacentre and cluster names and changes these later.

From: Christopher Law <chris@chrislaw.me>
Sent: 12 November 2020 09:21
To: Ritesh Chikatwar <rchikatw@redhat.com>; shadow emy <shadow.emy1@gmail.com>
Cc: users <users@ovirt.org>
Subject: [ovirt-users] Re: Cluster compatibility version 4.5 on oVirt 4.4

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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