6:07 p.m.
Il giorno mer 16 feb 2022 alle ore 13:33 Yedidyah Bar David <didi(a)redhat.com>
ha scritto:
On Wed, Feb 16, 2022 at 2:09 PM Gianluca Merlo
<gianluca.merlo(a)gmail.com>
wrote:
>
> Il giorno mer 16 feb 2022 alle ore 10:22 Yedidyah Bar David <
didi(a)redhat.com> ha scritto:
>>
>> On Tue, Feb 15, 2022 at 6:48 PM Gianluca Merlo <
gianluca.merlo(a)gmail.com> wrote:
>> >
>> > Hi Jonas,
>> >
>> > I would like to say that I also have a 4.4 HE (4.4.5.11-1) that I am
trying to upgrade to the latest one, and have this issue. I read through
>> >
>> >
https://lists.ovirt.org/archives/list/users@ovirt.org/thread/D3FEXQ5KOLN3...
>> >
https://lists.ovirt.org/archives/list/users@ovirt.org/thread/4EBNIFJ3ANER...
>> >
>> > but did not manage to get out of the issue. I tried:
>> >
>> > - yum remove ovirt-release44
>> > - Download and install manually (rpm -i)
https://resources.ovirt.org/pub/yum-repo/ovirt-release44.rpm
>> >
>> > After this I have regained a functional package manager on the
engine. However trying to go further in the update procedure (
https://ovirt.org/documentation/upgrade_guide/#Updating_a_self-hosted_eng...)
running
>> >
>> > engine-upgrade-check
>> >
>> > fails with
>> >
>> > > OK: Downloaded CentOS Linux 8 - AppStream
>> > > FAIL: Failed to download metadata for repo 'appstream':
Cannot
prepare internal mirrorlist: No URLs in mirrorlist
>> > > Error: Failed to download metadata for repo 'appstream':
Cannot
prepare internal mirrorlist: No URLs in mirrorlist
>> >
>> > So I am stuck in wait of a comment from someone more knowledgeable
too!
>>
>> Did you upgrade the machine to CentOS Stream? CentOS Linux archives are
gone.
>
>
> No, I did not do anything apart from trying to fix sources set up from
ovirt-release44. May I ask if you could share some guidance on the process?
Sorry, I only did this on very few development machines, so do not
have any significant "real life experience" to share.
> I can see that various third parties provide their "guide" on how to
perform the migration, the most "neutral" one I could find is
>
>
https://unix.stackexchange.com/questions/552873/how-to-switch-from-centos...
>
> but I am having a hard time finding any "official" documentation from
CentOS
I think the "official" doc is:
https://www.centos.org/centos-stream/ -> Press "8" -> check
"Converting from CentOS Linux 8 to CentOS Stream 8"
I completely missed that and it was in plain view! It is brief, but gives
weight to other procedures online! Thank you.
This is very similar to, and slightly more specific/safe, than:
https://centos.org/distro-faq/#q7-how-do-i-migrate-my-centos-linux-8-inst...
The stackexchange answer above is also slightly more detailed than
both of these, based on a specific user's experience.
I definitely recommend trying first on test machines, as similar as
possible to your production ones.
Fortunately it is not strictly a production environment, I am not in a
hurry and can afford some downtime, but I cannot afford total loss. I will
consider if it is possible to spin up a 4.4.5 setup, but I had some bad
luck in the past with a similar scenario (testing an upgrade of things that
were no longer in the mirrors) that makes me skeptical about the
feasibility of the test.
or oVirt.
You are right - there are no oVirt-specific migration procedures I am
aware of.
> May I also ask if this is the way to do it on Hosted Engine (not
standalone) deployments, or may it be that there are easier ways to
accomplish this in this scenario (e.g. redeployment from newer image)?
There is a way, which is to follow the general hosted-engine
backup/restore procedure. This isn't an in-place upgrade - requires a
new storage space for the hosted-engine domain, etc.
The appliance that the oVirt project releases is based on Stream since
4.4.6 IIRC. Same for ovirt-node - so if you use node, the normal
upgrade process for it will get you Stream.
> It would be nice to know if there is any documentation I missed on how
to best handle the Centos 8 -> Centos 8 Stream conversion in my case (which
is hosted engine on ovirt-node hosts).
See above. I don't think you'll find anything more specific or
official. I recommend searching this list's archive - we had several
relevant threads over the last year - and testing on copies/clones of
your existing ones, if in production.
Thanks again. I am currently conflicted about choosing one of the following
two options
1. Manually update the engine in-place to CentOS stream then follow the
standard ovirt-node update procedure for hosts. The engine could be kind of
a snowflake after this I assume, but unless a catastrophe happens I assume
I should be able to eventually redeploy it from scratch from a backup down
the line if anything goes wrong, once I update nodes (and thus the engine
appliance image). This procedure seems easy, the risk comes from something
unforeseen happening in the CentOS stream upgrade.
2. Update nodes first, then take advantage of the updated engine
appliance image to do a redeployment of the engine from a backup. This
seems safer than the latter, but I am also doubtful about the possibility
of restoring a 4.4.5 backup on a newer version of the engine, which may
break the deal. Also, I am not sure if updating hosts before the engine is
a supported path.
I think I will review backup/restore procedures just in case, reflect a bit
and wait if someone from the community or the development team has
suggestions on these (or alternative) procedures, just to have further
confirmation.
Again good luck, best regards,
--
Didi