[ovirt-devel] Creating a new gerrit flag
Nir Soffer
nsoffer at redhat.com
Thu Dec 11 10:19:11 UTC 2014
----- Original Message -----
> From: "David Caro" <dcaroest at redhat.com>
> To: "Nir Soffer" <nsoffer at redhat.com>
> Cc: "Eyal Edri" <eedri at redhat.com>, "Oved Ourfali" <ovedo at redhat.com>, "infra" <infra at ovirt.org>, devel at ovirt.org
> Sent: Thursday, December 11, 2014 12:06:24 PM
> Subject: Re: [ovirt-devel] Creating a new gerrit flag
>
> On 12/11, Nir Soffer wrote:
> > ----- Original Message -----
> > > From: "David Caro" <dcaroest at redhat.com>
> > > To: "Nir Soffer" <nsoffer at redhat.com>
> > > Cc: "Eyal Edri" <eedri at redhat.com>, "Oved Ourfali" <ovedo at redhat.com>,
> > > "infra" <infra at ovirt.org>, devel at ovirt.org
> > > Sent: Wednesday, December 10, 2014 4:59:36 PM
> > > Subject: Re: [ovirt-devel] Creating a new gerrit flag
> > >
> > > On 12/10, Nir Soffer wrote:
> > > >
> > > >
> > > > ----- Original Message -----
> > > > > From: "Eyal Edri" <eedri at redhat.com>
> > > > > To: devel at ovirt.org
> > > > > Cc: "Oved Ourfali" <ovedo at redhat.com>, "infra" <infra at ovirt.org>
> > > > > Sent: Wednesday, December 10, 2014 10:40:47 AM
> > > > > Subject: Re: [ovirt-devel] Creating a new gerrit flag
> > > > >
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > > From: "Oved Ourfali" <ovedo at redhat.com>
> > > > > > To: "David Caro" <dcaroest at redhat.com>
> > > > > > Cc: devel at ovirt.org
> > > > > > Sent: Wednesday, December 10, 2014 8:30:30 AM
> > > > > > Subject: Re: [ovirt-devel] Creating a new gerrit flag
> > > > > >
> > > > > >
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > > From: "David Caro" <dcaroest at redhat.com>
> > > > > > > To: "Oved Ourfali" <ovedo at redhat.com>
> > > > > > > Cc: devel at ovirt.org
> > > > > > > Sent: Tuesday, December 9, 2014 7:02:44 PM
> > > > > > > Subject: Re: [ovirt-devel] Creating a new gerrit flag
> > > > > > >
> > > > > > > On 12/09, Oved Ourfali wrote:
> > > > > > > >
> > > > > > > >
> > > > > > > > ----- Original Message -----
> > > > > > > > > From: "David Caro" <dcaroest at redhat.com>
> > > > > > > > > To: "Oved Ourfali" <ovedo at redhat.com>
> > > > > > > > > Cc: "Sven Kieske" <s.kieske at mittwald.de>, devel at ovirt.org
> > > > > > > > > Sent: Tuesday, December 9, 2014 3:40:30 PM
> > > > > > > > > Subject: Re: [ovirt-devel] Creating a new gerrit flag
> > > > > > > > >
> > > > > > > > > On 12/09, Oved Ourfali wrote:
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > ----- Original Message -----
> > > > > > > > > > > From: "Sven Kieske" <s.kieske at mittwald.de>
> > > > > > > > > > > To: devel at ovirt.org
> > > > > > > > > > > Sent: Tuesday, December 9, 2014 3:21:43 PM
> > > > > > > > > > > Subject: Re: [ovirt-devel] Creating a new gerrit flag
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > > On 09/12/14 13:47, Oved Ourfali wrote:
> > > > > > > > > > > > safe up to 95% or so.
> > > > > > > > > > >
> > > > > > > > > > > You just made up that number.
> > > > > > > > > > > I don't really understand why you would want
> > > > > > > > > > > to downgrade your code quality by circumventing tests.
> > > > > > > > > > >
> > > > > > > > > > > Maybe someone can elaborate on this a bit?
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > It doesn't downgrade the code quality.
> > > > > > > > > > It is just a way to ensure developers can both merge
> > > > > > > > > > changes,
> > > > > > > > > > and
> > > > > > > > > > do
> > > > > > > > > > it
> > > > > > > > > > as
> > > > > > > > > > safely as possible without relying on post-submit tools.
> > > > > > > > > > The number is indeed invented... as I don't have real
> > > > > > > > > > statistics,
> > > > > > > > > > but
> > > > > > > > > > it
> > > > > > > > > > comes to say that it would be safe most of the time.
> > > > > > > > > > After the patch is merged, if CI will fail, it is the
> > > > > > > > > > responsibility
> > > > > > > > > > of
> > > > > > > > > > the
> > > > > > > > > > developer to check that out and fix that.
> > > > > > > > >
> > > > > > > > > This thread was started to avoid getting to that point, as
> > > > > > > > > getting a
> > > > > > > > > failed patch inside the code means breaking all the other
> > > > > > > > > tests
> > > > > > > > > that
> > > > > > > > > run on top of it and that blocks all the development, not
> > > > > > > > > only
> > > > > > > > > that
> > > > > > > > > specific patch.
> > > > > > > > >
> > > > > > > >
> > > > > > > > The issue that started the discussion was an issue in which
> > > > > > > > there
> > > > > > > > was a
> > > > > > > > Tests "-1" flag, and it was ignored.
> > > > > > > > My suggestion will enforce that it won't be ignored.
> > > > > > > > In more rare cases, in which the rebase is the source of the
> > > > > > > > tests
> > > > > > > > issue,
> > > > > > > > then you'll find about it later.
> > > > > > >
> > > > > > > I started the discussion, and I started it because a developer
> > > > > > > complained about not being able to merge a patch because it was
> > > > > > > failing the tests due to an already merged patch that was making
> > > > > > > all
> > > > > > > the builds to fail. And was trying to get a solution to avoid
> > > > > > > getting
> > > > > > > to that point where a patch is merged while breaking the tests.
> > > > > > >
> > > > > > >
> > > > > > > So in summary, you are suggestion this:
> > > > > > >
> > > > > > > Creating a new flag 'tested' with values +1, 0 and -1 that only
> > > > > > > jenkins
> > > > > > > and managers can set
> > > > > > >
> > > > > > > Block form submitting any patches that have a -1
> > > > > > >
> > > > > > > Carry the value of that flag to following patches only if the
> > > > > > > flag
> > > > > > > was
> > > > > > > -1
> > > > > > >
> > > > > >
> > > > >
> > > > > +1, we need a way to block bad patches from being merged, even with a
> > > > > rebase
> > > > > in gerrit.
> > > > > going forward we're planning a few changes to the way jenkins jobs
> > > > > are
> > > > > run on
> > > > > ovirt ci, which will help
> > > > > reduce noise and imrove resources usages.
> > > > >
> > > > > 1. moving into a flow process, where critical jobs like unit
> > > > > tests/checkstyle
> > > > > will run first and only then other heavy jobs will run
> > > > > (integration/rpms/findbugs)
> > > >
> > > > This is already implemented in vdsm for few months - running "make
> > > > check"
> > > > will run the fast tests first and will not run the slower tests if a
> > > > fast
> > > > test
> > > > failed.
> > >
> > > Please change to be able to run only fast tests or only slow tests,
> > > that way we can separate the job into two and give feedback about the
> > > fast tests before the slows have finished running.
> >
> > These are the available targets (from faster to slower):
> >
> > - gitignore - check that certain files are ignored
> >
> > - pyflakes - check common Python errors (e.g. unused imports)
> >
> > - pep8 - style check
> >
> > - check - run the fast checks above and if successful, the unittests
> >
> > Environment variables:
> >
> > NOSE_SLOW_TESTS=1 - enable slow tests (we have only few)
> > NOSE_STRESS_TESTS=1 - enable stress tests (probably not useful for the
> > CI)
> >
> > Note that the environment variables are used only for the tests in
> > vdsm/tests there are few tests in various sub directories that do
> > not use the test infrastructure in vdsm/tests.
> >
> > - check-all - run make check enbaling both slow and stress tests
> >
> > Do you need a separate target for the unittests?
>
> I just want to be able to execute:
>
> > make fast-check
>
> for fast checks (you decide what are and what are not)
>
> > make slow-check
>
> for slow checks, non overlapping, meaning that if you want to runa ll
> the checks, you'll have to use fast and then slow.
>
> The idea is to generalize the interface we use for the tests between
> all the ovirt projects so from ci we don't have to go keeping specific
> scripts for each provect and for each project version. And be able to
> run the fast checks (on each patchset, merges included) and the slow
> ones (on each merge only) separated so we can give feedback faster and
> not start the slow ones. Then after that goes the building of the rpm,
> and then the functional tests. And last the release if relevant.
>
> On patch:
> fast_check
fast_check is not a good name - how about check-patch?
>
> On merge:
> fast_check -> slow_check -> build -> functional_check -> release
Same: how about check-merge?
>
> That flow is generic for all the projects, so each project will have
> to implement the same interface to run each step (I don't really care
> if it's make fast-check or just a bash script that runs whatever you
> need underneath, the key is not having to specify any options if
> possible and running just one line, the same everywhere).
These target do not make any sense out of the CI environment.
I think you should implement these using a wrapper, adapting any
project the the CI "interface".
We can provide the building blocks using the makefile, so the CI
can use them to build the required flow.
>
> That simplifies a LOT the maintenance of the jenkins jobs, and allows
> to change the way checks are run bound to the version of the product.
Since each version may have different makefile, the CI wrapper must
handle this.
Nir
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