[openstack-dev] [release][requirements][packaging][summit] input needed on summit discussion about global requirements

Matthew Thode prometheanfire at gentoo.org
Tue Apr 19 18:11:00 UTC 2016

On 04/19/2016 12:44 PM, Clint Byrum wrote:
> Excerpts from Michał Jastrzębski's message of 2016-04-18 10:29:20 -0700:
>> What I meant is if you have liberty Nova and liberty Cinder, and you
>> want to upgrade Nova to Mitaka, you also upgrade Oslo to Mitaka and
>> Cinder which was liberty either needs to be upgraded or is broken,
>> therefore during upgrade you need to do cinder and nova at the same
>> time. DB can be snapshotted for rollbacks.
> If we're breaking backward compatibility even across one release, that
> is a bug.  You should be able to run Liberty components with Mitaka
> Libraries. Unfortunately, the testing matrix for all of the combinations
> is huge and nobody is suggesting we try to solve that equation.
> However, to the point of distros: partial upgrades is not the model distro
> packages work under. They upgrade what they can, whether they're a rolling
> release, or 7 year cycle LTS's. When the operator says "give me the new
> release", the packages that can be upgraded, will be upgraded. And if
> Mitaka Nova is depending on something outside the upper constraints in
> another package on the system, the distro will just hold Nova back.
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https://etherpad.openstack.org/p/newton-backwards-compat-libs is about
the test matrix problem across releases.

Also, Gentoo at least supports partial upgrades, I tend to have two
releases packaged at a time, currently liberty and mitaka.

-- Matthew Thode (prometheanfire)

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