Thanks for the prompt reply.

I assume I can safely ignore the "Upgrade cluster compatibility" warning until libvirt 6.6 gets pushed to CentOS 8.3?

- Gilboa

On Wed, Dec 16, 2020 at 5:56 PM Martin Perina <mperina@redhat.com> wrote:

On Wed, Dec 16, 2020 at 2:25 PM Gilboa Davara <gilboad@gmail.com> wrote:

Shani,

1. I created a new 4.5 cluster with the same CPU (Secure Intel Cascadelake Server Family) and platform type (Q35/BIOS).

2. All 3 hosts are 8.3, but report 4.4 compatibility.

3. The only reason I attempted to upgrade the cluster was simple: The cluster state kept on dropping down to "unavailable" (even though all 3 hosts are up) and I was offered to upgrade the cluster to v4.5.

- Gilboa

On Wed, Dec 16, 2020 at 1:28 PM Shani Leviim <sleviim@redhat.com> wrote:

Hi Gilboa,

Here are some guidelines/checks:

- Are you able to create a 4.5 DC/cluster?

- Host can be Up in the 4.5 clusters only when it reports 4.5 level compatibility (it's based on RHEL 8.3).

  Can you make sure that on all 3 hosts?

- You can upgrade the 4.4 clusters to 4.5 only when all Up/NonOperational hosts are reporting 4.5 level
- You can upgrade 4.4 DC to 4.5 only when all clusters inside are on the 4.5 level
- A 4.5 host-based on RHEL 8.3 should be fully functional in 4.2/4.3/4.4 clusters

Regards,

Shani Leviim

On Wed, Dec 16, 2020 at 12:53 PM Gilboa Davara <gilboad@gmail.com> wrote:

Hello all,

I'm more-or-less finished building a new ovirt over glusterfs cluster with 3 fairly beefy servers.

Nodes were fully upgraded to CentOS Linux release 8.3.2011 before they joined the cluster.

Looking at the cluster view in the WebUI, I get an exclamation mark with the following message: "Upgrade cluster compatibility level".

When I try to upgrade the cluster, 2 of the 3 hosts go into maintenance and reboot, but once the procedure is complete, the cluster version remains the same.

Looking at the host vdsm logs, I see that once the engine refreshes their capabilities, all hosts return 4.2-4.4 and not 4.5.

E.g.

 'supportedENGINEs': ['4.2', '4.3', '4.4'], 'clusterLevels': ['4.2', '4.3', '4.4']

I assume I should be seeing 4.5 after the upgrade, no?

AmI missing something?

EL 8.3 is not enough, you also need Advanced Virtualization 8.3 (in particular libvirt 6.6)

Thanks,

- Gilboa

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Martin Perina
Manager, Software Engineering
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