Open Stack

On Mon, Nov 29, 2021 at 12:38 PM Sean Mooney <smooney at redhat.com> wrote:

> On Fri, 2021-11-26 at 19:48 +0100, Dmitry Tantsur wrote:
> > On Fri, Nov 26, 2021 at 6:14 PM Alfredo Moralejo Alonso <
> amoralej at redhat.com>
> > wrote:
> >
> > >
> > >
> > > On Fri, Nov 26, 2021 at 4:44 PM Dmitry Tantsur <dtantsur at redhat.com>
> > > wrote:
> > >
> > > >
> > > >
> > > > On Fri, Nov 26, 2021 at 4:35 PM Ghanshyam Mann <
> gmann at ghanshyammann.com>
> > > > wrote:
> > > >
> > > > >  ---- On Fri, 26 Nov 2021 09:20:39 -0600 Dmitry Tantsur <
> > > > > dtantsur at redhat.com> wrote ----
> > > > >  >
> > > > >  >
> > > > >  > On Fri, Nov 26, 2021 at 3:35 PM Jeremy Stanley <
> fungi at yuggoth.org>
> > > > > wrote:
> > > > >  > On 2021-11-26 14:29:53 +0100 (+0100), Dmitry Tantsur wrote:
> > > > >  > [...]
> > > > >  > > CentOS/RHEL ships 3.6 and a limited version of 3.8 and 3.9.
> > > > >  > [...]
> > > > >  >
> > > > >  > Is this still true for CentOS Stream 9? The TC decision was to
> > > > >  > support that instead of CentOS Stream 8 in Yoga.
> > > > >  >
> > > > >  > No. But Stream 9 is pretty much beta, so it's not a replacement
> for
> > > > > us (and we don't have nodes in nodepool with it even yet?).
> > > > >
> > > > > I think here is the confusion. In TC, after checking with centos
> team
> > > > > impression was CentOS stream 9 is released and that is
> > > > > what we should update In OpenStack testing. And then only we
> updated the
> > > > > centos stream 8 -> 9 and dropped py3.6 testing
> > > > >
> > > > > -
> > > > >
> https://review.opendev.org/c/openstack/governance/+/815851/3..6/reference/runtimes/yoga.rst
> > > > >
> > > >
> > > > I think there is an enormous perception gap between the CentOS team
> and
> > > > the rest of the world.
> > > >
> > > >
> > > So, CentOS Stream 9 was released, in the official mirrors and usable
> since
> > > some weeks ago[1][2]. We shouldn't consider it beta or something like
> that.
> > >
> > > As mentioned, support for diskimage-builder has been introduced for CS9
> > > and there are nodepool nodes ready for it. From RDO, we are providing
> RPMs
> > > for master branch content on CentOS Stream 9 [3] and actually we have
> been
> > > doing some tests. Actually, we have recently merged new jobs in
> > > puppet-openstack[4].
> > >
> >
> > "It's usable since some weeks ago and we even added tests today" is not
> > exactly reassuring :) The PTI uses wording "stable and LTS", which
> applies
> > to Stream 9 no more than it applies to Fedora.
> thats not quite true.
> yes centos 9 is a roling release but it is more stable then fedroa since
> packages landing in centos 9 stream have been
> stablised via fedroa already and any argurments in this regard would also
> apply to centos 8 stream.
>

Stream 8 is part of an already released and maintained RHEL, hence I give
it a certain benefit of doubt. More on this below.


>
> The only reason that centos 8 stream would be more stable then 9 stream is
> due to less frequent updates as focus moves to 9 stream.
> 9 stream is effectivly a preview of what whill be rhel 9.
> >
> > In the end, what we test with Bifrost is what we will recommend people to
> > deploy it in production on. I do believe people can and should deploy on
> > Stream 8 despite all the FUD around it, but I cannot do it for Stream 9
> > until RHEL 9 is out.
>
> why just because rhel 9.0 is relased does not mean centos 9 is sudennly
> more stable.
>

Okay, you convinced me, I won't recommend Stream 9 at all :)

Kidding aside, we know that each major branch of RHEL offers a certain
degree of compatibility. It's not expected that 8.N+1 breaks a lot of stuff
from 8.N, hence it's not expected that Stream between them will break
anything (modulo bugs) either. I have no idea what and how gets into Stream
9 now, nor will I risk recommending it for production.

Dmitry


> Now that centos 9 has been release there shoudl be no more package
> removalas form centos/rhel so
> it should have stableised in terms of the minium package set and over time
> we woudl expect more pacakges to be added.
> yes centos 8 stream will be supported until the EOL or rhel 8 so people
> can continue to deploy it.
> rhel 9 will be released next year, perhaps not before yoga is released but
> if you are deploying RDO you will not be useing
> RHEL anyway you will be using centos so stream 9 is the better plathform
> to use if you plan to continue to upgrade the deploy
> ment over the next few year as it allow you to avoid the costly OS upgrade
> when moving to the next openstack relesase.
>

> >
> > Dmitry
> >
> >
> > >
> > > [1] https://www.centos.org/centos-stream/
> > > <http://mirror.stream.centos.org/9-stream/>
> > > [2] https://cloud.centos.org/centos/9-stream/x86_64/images/
> > > [3] https://trunk.rdoproject.org/centos9-master/report.html
> > > [4]
> > >
> https://review.opendev.org/c/openstack/puppet-openstack-integration/+/793462
> > >
> > > Alfredo
> > >
> > >
> > >
> > > > Dmitry
> > > >
> > > >
> > > > >
> > > > > <
> https://review.opendev.org/c/openstack/governance/+/815851/3..6/reference/runtimes/yoga.rst
> >
> > > > >
> > > > > -gmann
> > > > >
> > > > >  > Dmitry
> > > > >  >  --
> > > > >  > Jeremy Stanley
> > > > >  >
> > > > >  >
> > > > >  > --
> > > > >  > Red Hat GmbH, https://de.redhat.com/ , Registered seat:
> Grasbrunn,
> > > > >  > Commercial register: Amtsgericht Muenchen, HRB 153243,
> > > > >  > Managing Directors: Charles Cachera, Brian Klemm, Laurie Krebs,
> > > > > Michael O'Neill
> > > > >  >
> > > > >
> > > > >
> > > >
> > > > --
> > > > Red Hat GmbH, https://de.redhat.com/ , Registered seat: Grasbrunn,
> > > > Commercial register: Amtsgericht Muenchen, HRB 153243,
> > > > Managing Directors: Charles Cachera, Brian Klemm, Laurie Krebs,
> Michael
> > > > O'Neill
> > > >
> > >
> >
>
>

-- 
Red Hat GmbH, https://de.redhat.com/ , Registered seat: Grasbrunn,
Commercial register: Amtsgericht Muenchen, HRB 153243,
Managing Directors: Charles Cachera, Brian Klemm, Laurie Krebs, Michael
O'Neill
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