[all] Gate resources and performance
skaplons at redhat.com
Sat Feb 6 19:51:38 UTC 2021
Dnia sobota, 6 lutego 2021 10:33:17 CET Dmitry Tantsur pisze:
> On Sat, Feb 6, 2021 at 12:10 AM Jeremy Stanley <fungi at yuggoth.org> wrote:
> > On 2021-02-05 22:52:15 +0100 (+0100), Dmitry Tantsur wrote:
> > [...]
> > > 7.1. Stop marking dependent patches with Verified-2 if their
> > > parent fails in the gate, keep them at Verified+1 (their previous
> > > state). This is a common source of unnecessary rechecks in the
> > > ironic land.
> > [...]
> > Zuul generally assumes that if a change fails tests, it's going to
> > need to be revised.
> Very unfortunately, it's far from being the case in the ironic world.
> > Gerrit will absolutely refuse to allow a change
> > to merge if its parent has been revised and the child has not been
> > rebased onto that new revision. Revising or rebasing a change clears
> > the Verified label and will require new test results.
> This is fair, I'm only referring to the case where the parent has to be
> rechecked because of a transient problem.
> > Which one or
> > more of these conditions should be considered faulty? I'm guessing
> > you're going to say it's the first one, that we shouldn't assume
> > just because a change fails tests that means it needs to be fixed.
> Unfortunately, yes.
> A parallel proposal, that has been rejected numerous times, is to allow
> recheching only the failed jobs.
Even if I totally understand cons of that I would also be for such
possibility. Maybe e.g. if only cores would have such possibility somehow
would be good trade off?
> > This takes us back to the other subthread, wherein we entertain the
> > notion that if changes have failing jobs and the changes themselves
> > aren't at fault, then we should accept this as commonplace and lower
> > our expectations.
> > Keep in mind that the primary source of pain here is one OpenStack
> > has chosen. That is, the "clean check" requirement that a change get
> > a +1 test result in the check pipeline before it can enter the gate
> > pipeline. This is an arbitrary pipeline criterion, chosen to keep
> > problematic changes from getting approved and making their way
> > through the gate queue like a wrecking-ball, causing repeated test
> > resets for the changes after them until they reach the front and
> > Zuul is finally able to determine they're not just conflicting with
> > other changes ahead. If a major pain for Ironic and other OpenStack
> > projects is the need to revisit the check pipeline after a gate
> > failure, that can be alleviated by dropping the clean check
> > requirement.
> > Without clean check, a change which got a -2 in the gate could
> > simply be enqueued directly back to the gate again. This is how it
> > works in our other Zuul tenants. But the reason OpenStack started
> > enforcing it is that reviewers couldn't be bothered to confirm
> > changes really were reasonable, had *recent* passing check results,
> > and confirmed that observed job failures were truly unrelated to the
> > changes themselves.
> > --
> > 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
Principal Software Engineer
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