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Le jeu. 30 mars 2023 à 06:16, Takashi Kajinami <tkajinam at redhat.com> a
écrit :

> Hello,
>
>
> Since we migrated our jobs from Ubuntu Focal to Ubuntu Jammy, heat gate
> jobs have
> become very flaky. Further investigation revealed that the issue is
> related to something
> in libvirt from Ubuntu Jammy and that prevents detaching devices from
> instances[1].
>
> The same problem appears in different jobs[2] and we workaround the
> problem by disabling
> some affected jobs. In heat we also disabled some flaky tests but because
> of this we no longer
> run basic scenario tests which deploys instance/volume/network in a single
> stack, which means
> we lost the quite basic test coverage.
>
> My question is, is there anyone in the Nova team working on "fixing" this
> problem ?
> We might be able to implement some workaround (like checking status of the
> instances before
> attempting to delete it) but this should be fixed in libvirt side IMO, as
> this looks like a "regression"
> in Ubuntu Jammy.
> Probably we should report a bug against the libvirt package in Ubuntu but
> I'd like to hear some
> thoughts from the nova team because they are more directly affected by
> this problem.
>
>

FWIW, we discussed about it yesterday on our vPTG :
https://etherpad.opendev.org/p/nova-bobcat-ptg#L289

Most of the problems come from the volume detach thing. We also merged some
Tempest changes for not trying to cleanup some volumes if the test was OK
(thanks Dan for this). We also added more verifications to ask SSH to wait
for a bit of time before calling the instance.
Eventually, as you see in the etherpad, we didn't found any solutions but
we'll try to add some canary job for testing multiple times volume
attachs/detachs.

We'll also continue to discuss on the CI failures during every Nova weekly
meetings (Tuesdays at 1600UTC on #openstack-nova) and I'll want to ask a
cross-project session for the Vancouver pPTG for Tempest/Cinder/Nova and
others.
I leave other SMEs to reply on your other points, like for c9s.


> I'm now trying to set up a centos stream 9 job in Heat repo to see whether
> this can be reproduced
> if we use centos stream 9. I've been running that specific scenario test
> in centos stream 9 jobs
> in puppet repos but I've never seen this issue, so I suspect the issue is
> really specific to libvirt
> in Jammy.
>


Well, maybe I'm wrong, but no, we also have a centos9stream issue for
volume detachs :
https://bugs.launchpad.net/nova/+bug/1960346



> [1] https://bugs.launchpad.net/nova/+bug/1998274
> [2] https://bugs.launchpad.net/nova/+bug/1998148
>
> Thank you,
> Takashi
>
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