[Openstack-operators] [Upgrades] Interoperability Matrix

Fuente, Pablo A pablo.a.fuente at intel.com
Mon Apr 21 13:25:34 UTC 2014


You are right regarding grenade, but there is a subtle difference with
the interoperability matrix.
Meanwhile grenade does the upgrade and ensures it is working,  the
matrix checks that different components versions work well (or not)
together, hoping that this information helps in the upgrade decisions
(for example, upgrades orders). 
In other words, Grenade moves the entire “cloud” from one version to
another (all the components in the same version) and the matrix tests an
specific component version against the rest of the cloud in another
Actually, I am considering to build this matrix without performing any

Then, do you think this matrix could be helpful?

Thank you very much for your answer!
On Thu, 2014-04-17 at 11:27 -0700, Clint Byrum wrote:
> Excerpts from Fuente, Pablo A's message of 2014-04-16 14:00:47 -0700:
> > Hi guys,
> > 
> > I would like to open a discussion related to OpenStack upgrades ( I mean
> > moving from one version to another, for example Havana to Icehouse).
> > 
> > As you probably know, this is a big issue, since there is no silver
> > bullet to do it. For that reason, I am thinking  in an option to provide
> > more input prior to do an upgrade.
> > 
> > The idea is to generate an interoperability matrix, where devops can see
> > if an specific commit works with all the available OpenStack versions,
> > distinguishing among the different components. For example, you could
> > see if  the Nova X commit is or not backward compatible with the
> > Grizzly/Havana/Icehouse versions of Keystone/Neutron/Cinder/...
> > 
> > Do you think this matrix would be useful in the upgrade tasks? 
> > 
> The gate currently has "grenade", which attempts to upgrade a working
> stable release to the each commit. If this does not pass, it does not
> merge.
> https://wiki.openstack.org/wiki/Grenade
> So this interoperability matrix is actually already maintained, as _every_
> commit should be able to upgrade from the previous stable release.
> Failures when attempting to do so are bugs in two things: the thing that
> breaks on upgrade, and grenade.
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