[openstack-dev] [all][tc] Clarifying testing recommendation for interop programs

Andrea Frittoli andrea.frittoli at gmail.com
Fri Jan 19 15:29:34 UTC 2018

On Mon, Jan 15, 2018 at 12:59 PM Erno Kuvaja <ekuvaja at redhat.com> wrote:

> On Thu, Jan 11, 2018 at 4:36 PM, Colleen Murphy <colleen at gazlene.net>
> wrote:
> > Hi everyone,
> >
> > We have governance review under debate[1] that we need the community's
> help on.
> > The debate is over what recommendation the TC should make to the Interop
> team
> > on where the tests it uses for the OpenStack trademark program should be
> > located, specifically those for the new add-on program being introduced.
> Let me
> > badly summarize:
> >
> > A couple of years ago we issued a resolution[2] officially recommending
> that
> > the Interop team use solely tempest as its source of tests for capability
> > verification. The Interop team has always had the view that the
> developers,
> > being the people closest to the project they're creating, are the best
> people
> > to write tests verifying correct functionality, and so the Interop team
> doesn't
> > maintain its own test suite, instead selecting tests from those written
> in
> > coordination between the QA team and the other project teams. These
> tests are
> > used to validate clouds applying for the OpenStack Powered tag, and
> since all
> > of the projects included in the OpenStack Powered program already had
> tests in
> > tempest, this was a natural fit. When we consider adding new trademark
> programs
> > comprising of other projects, the test source is less obvious. Two
> examples are
> > designate, which has never had tests in the tempest repo, and heat, which
> > recently had its tests removed from the tempest repo.
> >
> > So far the patch proposes three options:
> >
> > 1) All trademark-related tests should go in the tempest repo, in
> accordance
> >    with the original resolution. This would mean that even projects that
> have
> >    never had tests in tempest would now have to add at least some of
> their
> >    black-box tests to tempest.
> >
> > The value of this option is that centralizes tests used for the Interop
> program
> > in a location where interop-minded folks from the QA team can control
> them. The
> > downside is that projects that so far have avoided having a dependency on
> > tempest will now lose some control over the black-box tests that they
> use for
> > functional and integration that would now also be used for trademark
> > certification.
> > There's also concern for the review bandwidth of the QA team - we can't
> expect
> > the QA team to be continually responsible for an ever-growing list of
> projects
> > and their trademark tests.
> >
> > 2) All trademark-related tests for *add-on projects* should be sourced
> from
> >    plugins external to tempest.
> >
> > The value of this option is it allows project teams to retain control
> over
> > these tests. The potential problem with it is that individual project
> teams are
> > not necessarily reviewing test changes with an eye for interop concerns
> and so
> > could inadvertently change the behavior of the trademark-verification
> tools.
> >
> > 3) All trademark-related tests should go in a single separate tempest
> plugin.
> >
> > This has the value of giving the QA and Interop teams control over
> > interop-related tests while also making clear the distinction between
> tests
> > used for trademark verification and tests used for CI. Matt's argument
> against
> > this is that there actually is very little distinction between those two
> cases,
> > and that a given test could have many different applications.
> >
> > Other ideas that have been thrown around are:
> >
> > * Maintaining a branch in the tempest repo that Interop tests are pulled
> from.
> >
> > * Tagging Interop-related tests with decorators to make it clear that
> they need
> >   to be handled carefully.
> >
> > At the heart of the issue is the perception that projects that keep their
> > integration tests within the tempest tree are somehow blessed, maybe by
> the QA
> > team or by the TC. It would be nice to try to clarify what technical
> > and political
> > reasons we have for why different projects have tests in different
> places -
> > review bandwidth of the QA team, ownership/control by the project teams,
> > technical interdependency between certain projects, or otherwise.
> >
> As someone who has been in middle of all that already once I'd like to
> bring up bit more fundamental problem into this topic. I'm not able to
> provide one size fits all solution but hopefully some insight that
> would help the community to make the right decision.
> I think the biggest problem is who's fox is let to guard the chicken coop.
> By that I mean the basic problem of our testing still relies on what
> is tested based on which assumptions and by whom. If the tests are
> provided by the project teams, the test is more likely to cover the
> intended usecase of the feature as it's implemented and if there is
> bug found on that, the likelyhood that the test is altered is quite
> high also the individual projects might not have the best idea what
> might be the important things to the interoperability and trademark
> purposes. Obviously when the test is written against intended behavior
> it's less likely but also those changes might sneak in affecting the
> interoprability. On the other hand if the test is written by
> QA/interoperability people, is it actually testing the right thing and
> is there more fundamental need to break it due to the fact that
> instead of catching and reporting the bug when the test is written, we
> start enforcing it. Are the tests written based on the intended
> behavior, documented behavior or the current actual behavior? And the
> biggest question of them all is who is going to have the bandwidth to
> understand the depth of the projects and their ties between to ensure
> we minimize the above?
> In perfect world all features are bug free, rational to use and well
> documented so that anyone can easily write a test that can be ran
> against any version to verify that we do not have regressions. We just
> are not living in that perfect world and each of the options are risky
> to cause conflicts.
> I think the optimal solution if we were introducing this as new fresh
> concept would be using tempest as engine to run trademark test plugins
> from their own repo and those plugins would be provided in
> collaboration between the trademark group as what are the
> functionalities tested, QA to ensure that the tests actually verify
> what they should be testing and the project teams ensuring that the
> tested feature is a) behaving and b) tested as it's intended to work
> and documentation is aligned with that, where the faults on any 3
> could be rectified before enforcing. Unfortunately I do not see us as
> the community having the resources to this "the right way" and I have
> really hard time trying to decide which of the proposed options would
> be least bad.

Why not? So far interoperability testing has been a shared effort between
project, QA and interop team.

For a project to be part of an interoperability program there must be
resources allocated to writing / maintaining interop tests. If they are not
avaiable the interop program won't be very successful.


> I think the worst case scenario is that we scrape together what ever
> we can just to have something to say that we test it and not have
> consistency nor clear responsibility of who, what and how.
> (Unfortunately I think this is the current situation and I'm super
> happy to hear that this is being discussed and the decision is not
> made lightly.)
> Best,
> Erno -jokke- Kuvaja
> > Ultimately, as Jeremy said in the comments on the resolution patch, the
> > recommendation should be one that works best for the QA and Interop
> teams. So
> > far we've heard from Matt and Mark expressing moderate support for
> option 2.
> > We'd like to hear more from those teams about how they see this working,
> > especially with regard to concerns about the quality and stability
> standards
> > that out-of-tree tests may be held to. We additionally need input from
> the
> > whole community on how maintaining trademark-related tests in tempest
> will
> > affect you if you don't already have your tests there. We'd especially
> like to
> > address any perceptions of favoritism or exclusionism that stem from
> these
> > issues.
> >
> > And to quickly clear up one detail before it makes it onto this thread,
> the
> > Queens Community Goal about splitting tempest plugins out of the main
> project's
> > tree[3] is entirely about addressing technical problems related to
> packaging for
> > existing tempest plugins, it's not a decree about what should live
> > within the tempest
> > repository nor does it have anything to do with the Interop program.
> >
> > As I'm not deeply steeped in the history of either the Interop or QA
> teams I am
> > sure I've misrepresented some details here, I'm sorry about that. But
> we'd like
> > to get this resolution moving forward and we're currently stuck, so this
> thread
> > is intended to gather enough community input to get unstuck and avoid
> letting
> > this proposal become stale. Please respond to this thread or comment on
> the
> > resolution proposal[1] if you have any thoughts.
> >
> > Colleen
> >
> > [1] https://review.openstack.org/#/c/521602
> > [2]
> https://governance.openstack.org/tc/resolutions/20160504-defcore-test-location.html
> > [3]
> https://governance.openstack.org/tc/goals/queens/split-tempest-plugins.html
> >
> >
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