Open Stack

Excerpts from Joe Gordon's message of 2014-03-18 17:15:59 -0700:
> On Tue, Mar 18, 2014 at 8:12 AM, Sean Dague <sean at dague.net> wrote:
> 
> > On 03/18/2014 10:11 AM, Daniel P. Berrange wrote:
> > > On Tue, Mar 18, 2014 at 07:50:15AM -0400, Davanum Srinivas wrote:
> > >> Hi Team,
> > >>
> > >> We have 2 choices
> > >>
> > >> 1) Upgrade to libvirt 0.9.8+ (See [1] for details)
> > >> 2) Enable UCA and upgrade to libvirt 1.2.2+ (see [2] for details)
> > >>
> > >> For #1, we received a patched deb from @SergeHallyn/@JamesPage and ran
> > >> tests on it in review https://review.openstack.org/#/c/79816/
> > >> For #2, @SergeHallyn/@JamesPage have updated UCA
> > >> ("precise-proposed/icehouse") repo and we ran tests on it in review
> > >> https://review.openstack.org/#/c/74889/
> > >>
> > >> For IceHouse, my recommendation is to request Ubuntu folks to push the
> > >> patched 0.9.8+ version we validated to public repos, then we can can
> > >> install/run gate jobs with that version. This is probably the smallest
> > >> risk of the 2 choices.
> > >
> > > If we've re-run the tests in that review enough times to be confident
> > > we've had a chance of exercising the race conditions, then using the
> > > patched 0.9.8 seems like a no-brainer. We know the current version in
> > > ubuntu repos is broken for us, so the sooner we address that the better.
> >
> 
> 
> ++
> 
> >  >
> > >> As soon as Juno begins, we can switch 1.2.2+ on UCA and request Ubuntu
> > >> folks to push the verified version where we can use it.
> >
> 
> ++
> 
> >  >
> > > This basically re-raises the question of /what/ we should be testing in
> > > the gate, which was discussed on this list a few weeks ago, and I'm not
> > > clear that there was a definite decision in that thread
> > >
> > >
> > http://lists.openstack.org/pipermail/openstack-dev/2014-February/027734.html
> > >
> > > Testing the lowest vs highest is targetting two different scenarios
> > >
> > >   - Testing the lowest version demonstrates that OpenStack has not
> > >     broken its own code by introducing use of a new feature.
> > >
> > >   - Testing the highest version demonstrates that OpenStack has not
> > >     been broken by 3rd party code introducing a regression.
> > >
> > > I think it is in scope for openstack to be targetting both of these
> > > scenarios. For anything in-between though, it is upto the downstream
> > > vendors to test their precise combination of versions. Currently though
> > > our testing policy for non-python bits is "whatever version ubuntu
> > ships",
> > > which may be neither the lowest or highest versions, just some arbitrary
> > > version they wish to support. So this discussion is currently more of a
> > > 'what ubuntu version should we test on' kind of decision
> >
> > I think testing 2 versions of libvirt in the gate is adding a matrix
> > dimension that we currently can't really support. We're just going to
> > have to pick one per release and be fine with it (at least for icehouse).
> >
> > If people want other versions tested, please come in with 3rd party ci
> > on it.
> >
> > We can revisit the big test matrix at summit about the combinations
> > we're going to actually validate, because with the various limitations
> > we've got (concurrency limits, quota limits, upstream package limits,
> > kinds of tests we want to run) we're going to have to make a bunch of
> > compromises. Testing something new is going to require throwing existing
> > stuff out of the test path.
> >
> 
> I think this is definitely worth revisiting at the summit, but I think we
> should move Juno to Libvirt 1.2.2+ as soon as possible instead of gating on
> a 2 year old release, and at the summit we can sort out what the full test
> matrix can be.
> 

We'll get this for free just by moving to Ubuntu 14.04 (aka "Trusty"),
which will release on April 17.

> As a side note tripleo uses libvirt from Saucy (1.1.1) so moving to latest
> libvirt would help support them.

We will move to trusty _ASAP_. Basically on April 17 we'll start testing
it and when it passes CI we'll be on it.