[openstack-dev] [tc][python-clients] More freedom for all python clients

Davanum Srinivas davanum at gmail.com
Wed Jan 14 12:57:11 UTC 2015


fyi, nova-docker is aspiring to be part of nova tree itself, but we
had a couple of python libraries we needed for docker that are not in
global, so we used the "soft" requirements to do that.



On Wed, Jan 14, 2015 at 7:50 AM, Sean Dague <sean at dague.net> wrote:
> On 01/14/2015 03:55 AM, Flavio Percoco wrote:
>> On 13/01/15 14:31 -0500, Sean Dague wrote:
>>> On 01/13/2015 02:10 PM, Jay Pipes wrote:
>>>> On 01/13/2015 12:39 PM, Zane Bitter wrote:
>>>>> On 13/01/15 10:01, Jeremy Stanley wrote:
>>>>>> On 2015-01-13 07:46:38 -0500 (-0500), Sean Dague wrote:
>>>>>>> Why doesn't rally just remove itself from projects.txt, then there
>>>>>>> would be no restrictions on what it adds.
>>>>>> I second this recommendation. If Rally wants to depend on things
>>>>>> which are not part of OpenStack and not required to run or test
>>>>>> OpenStack in an official capacity (and since it's not an official
>>>>>> OpenStack project it's entirely within its rights to want to do
>>>>>> that), then forcing it to comply with the list of requirements for
>>>>>> official OpenStack projects is an unnecessarily restrictive choice.
>>>>> FWIW I don't really agree with this advice. The purpose of
>>>>> openstack/requirements is to ensure that it's possible to create a
>>>>> distribution of OpenStack without conflicting version requirements, not
>>>>> to force every project to use every dependency listed. As such, some
>>>>> co-ordination around client libraries for related projects seems
>>>>> like it
>>>>> ought to be an uncontroversial addition. (Obviously it's easy to
>>>>> imagine
>>>>> potential additions that would legitimately be highly controversial,
>>>>> but
>>>>> IMHO this isn't one of them.) Saying that we require people to use our
>>>>> tools to get into the club but that our tools are not going to
>>>>> accommodate them in any way until they are in sounds a bit too close to
>>>>> "Go away" to my ears.
>>>> +1
>>> I think as we grow global-requirements probably needs to be broken up
>>> into functional lists. What's allowed in base-iass, what's allowed in
>>> application services, what's allowed in docs, etc, etc.
>>> The complexity of keeping the g-r list actually working goes up sort of
>>> n^2 as the size of it, because pip doesn't have a real solver. This is a
>>> barely functional set of plate spinning so "just add everything" misses
>>> the point that the breaks get more and more difficult to unwind.
>>> If someone is up for stepping up and contributing to breaking up into
>>> "domains", please do. But I think while this remains a global list we
>>> really do need to be a bit careful here.
>> Do we really need a per-domain g-r?
>> With the upcoming changes in the openstack governance model, I believe
>> this won't scale even if we break it into per-domain basis. Some
>> questions that need answeres are:
>> - Who's going to review the per domain g-r ?
>> If it's a centralized team, then it won't definitely scale. If it's
>> the domain team then, what's the real point of having these
>> requirements?
>> - How are we going to support the creation and maintnance of these g-r
>>  in the gate? Are they actually worth it?
>> While I understand why we have g-r, I really don't think it'll scale
>> for a broader community as we're envisioning it. With that in mind,
>> I'd probably recommend to have 1 requirements group for the base-caas
>> integrated gate and let other projects and groups have their own
>> requirements. That is, non base-caas projects should get the versions
>> of their common requirements from g-r so that they won't conflict if
>> they're installed alongside with any of the base-caas projects. But
>> other than those base requirements, I'd let non base-caas projects
>> have what they need (which is pretty much what heat's team has done
>> with the contrib packages, AFAICT).
>> I know this opens the doors for version conflicts between the
>> requirements of non base-caas projects but I think this is a more
>> welcoming (and non-blocking) way to do things until we've a better
>> one.
>> Hope the above makes some sense.... I blame the lack of coffee if it
>> doesn't,
>> Flavio
> We have the base infrastructure of that in devstack today with a SOFT
> requirements update -
> https://github.com/openstack-dev/devstack/blob/master/functions-common#L1696-L1704
> If you are not in projects.txt, and you set your REQUIREMENTS_MODE=soft
> in your devstack run, we will leave extra dependencies untouched.
> Probably a few more bits required to make it really easy to expose, but
> that direction is also feasable.
> The reason I brought up domains though is that some groups really want
> the facility to have common requirements lists across a domain. Like the
> OpenStack Docs team. They've currently inserted a ton of stuff in g-r
> that really shouldn't be there because they have a lot of git trees, and
> the synchronization is a nice feature.
> However, if there were domain specific lists, that would be fine. A
> collection of projects that want to coordinate could all agree on a
> domain specific set of lists, and off we go. Maybe that list wouldn't
> even need to be contained in the main repo, it could be in a sub repo so
> have different approvers.
>         -Sean
> --
> Sean Dague
> http://dague.net
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Davanum Srinivas :: https://twitter.com/dims

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