Hi Andrei,
ovirt 4.4+ has to run with centos/ rhel 8, I would not recommend mix
versions of ovirt node version within one cluster. (there couldbe / will
be a problem with vdsm version on each node)
And yes cluster compatibility version number doesn't match ovirt version.
I would recommend to try to remove the oldest node from the cluster (if
upu have some spare nodes) and try to reinstall it to centos 8 or 9 with
standalone engine for test if it works or not.
Jirka
On 8/29/22 14:26, Andrei Verovski wrote:
> Hi,
>
> My oldest nodes are version 4.2 on CentOS 7.6.
> What is the latest cluster compatibility level they support?
> Looks like oVirt Engine version and cluster compatibility level do not match number to number, e.g. my oVirt engine 4.4.10 seems can set cluster compatibility level up to 4.6.
>
> Someone from Red Hat, please clarify.
> Thanks in advance.
>
>
>> On 29 Aug 2022, at 15:09, Jirka Simon <jirka@vesim.cz> wrote:
>>
>> Hi Andrei,
>>
>> as I know, you need to have to have your cluster with at least 4.3 version to migrate to 4.5. I was facing the same problem with (not so) old hardware. and i started to do step by step migration.
>>
>> it means i created new cluster with fresh configuration with ovirt 4.5 and cluster compatibility version 4.7 next to old one with 4.4. Iit is a good opportunity to prepare whole cluster configuration in ansible for me :D
>>
>> Then I migrate VMs one by one from old cluster to the new one. When is one node free on old cluster I reinstall it and add to new cluster.
>>
>> Maybe it is not the fastest solution, but i can arrange maintenance for each VM.
>>
>> Jirka
>>
>> On 8/29/22 10:13, Andrei Verovski wrote:
>>> Hi,
>>>
>>> I have cluster compatibility version 4.2, due to some old nodes.
>>> From what I remember in oVirt 4.5 release notes (correct please, may be wrong here), oVirt engine 4.5 requires cluster compatibility version >= 4.3.
>>> Please clarify. Thanks.
>>>
>>>
>>>>> On 28. 8. 2022, at 18:52, Andrei Verovski <andreil1@starlett.lv> wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> I have engine version 4.4.10.7-1.el8, is it possible to set up new node host on CentOS Stream 9, or I need to upgrade engine to version 4.5 first (which is not right now possible because of some quite old nodes) ?
>>>> yes, you generally need the latest version
>>>> You can keep your old nodes old, 4.2 based nodes are still working with 4.5
>>>>
>>>>> Thanks
>>>>> Andrei
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