Open Stack

2018-02-14 22:53 GMT+01:00 Tom Barron <tpb at dyncloud.net>:
> On 13/02/18 16:53 -0600, Ben Nemec wrote:
>>
>>
>>
>> On 02/13/2018 01:57 PM, Tom Barron wrote:
>>>
>>> Since python 2.7 will not be maintained past 2020 [1] it is a reasonable
>>> conjecture that downstream distributions
>>> will drop support for python 2 between now and then, perhaps as early as
>>> next year.
>>
>>
>> I'm not sure I agree.  I suspect python 2 support will not go quietly into
>> that good night.  Personally I anticipate a lot of kicking and screaming
>> right up to the end, especially from change averse enterprise users.
>>
>> But that's neither here nor there.  I think we're all in agreement that
>> python 3 support is needed. :-)
>
>
> Yeah, but you raise a good issue.  How likely is it that EL8 will choose --
> perhaps under duress -- to support both python 2 and python 3 in the next
> big downstream release.  If this is done long enough that we can support
> TripleO deployments on CentOS 8 using python2 while at the same time testing
> TripleO deployments on CentOS using python3 then TripleO support for Fedora
> wouldn't be necessary.
>
> Perhaps this question is settled, perhaps it is open.  Let's try to nail
> down which for the record.
>

All I can say is that question is definitely settled. As far as
OpenStack is concerned,
there will be no Python2 on EL8.

>
>>
>>> In Pike, OpenStack projects, including TripleO, added python 3 unit
>>> tests.  That effort was a good start, but likely we can agree that it is
>>> *only* a start to gaining confidence that real life TripleO deployments will
>>> "just work" running python 3.  As agreed in the TripleO community meeting,
>>> this email is intended to kick off a discussion in advance of PTG on what
>>> else needs to be done.
>>>
>>> In this regard it is worth observing that TripleO currently only supports
>>> CentOS deployments and CentOS won't have python 3 support until RHEL does,
>>> which may be too late to test deploying with python3 before support for
>>> python2 is dropped.  Fedora does have support for python 3 and for this
>>> reason RDO has decided [2] to begin work to run with *stabilized* Fedora
>>> repositories in the Rocky cycle, aiming to be ready on time to migrate to
>>> Python 3 and support its use in downstream and upstream CI pipelines.
>>
>>
>> So that means we'll never have Python 3 on CentOS 7 and we need to start
>> supporting Fedora again in order to do functional testing on py3? That's
>> potentially messy.  My recollection of running TripleO CI on Fedora is that
>> it was, to put it nicely, a maintenance headache.  Even with the
>> "stabilized" repos from RDO, TripleO has a knack for hitting edge case bugs
>> in a fast-moving distro like Fedora.  I guess it's not entirely clear to me
>> what the exact plan is since there's some discussion of frozen snapshots and
>> such, which might address the fast-moving part.
>>
>> It also means more CI jobs, unless we're okay with dropping CentOS support
>> for some scenarios and switching them to Fedora.  Given the amount of
>> changes between CentOS 7 and current Fedora that's a pretty big gap in our
>> testing.
>>
>> I guess if RDO has chosen this path then we don't have much choice.  As
>> far as next steps, the first thing that would need to be done is to get
>> TripleO running on Fedora again.  I suggest starting with
>> https://github.com/openstack/instack-undercloud/blob/3e702f3bdfea21c69dc8184e690f26e142a13bff/instack_undercloud/undercloud.py#L1377
>> :-)
>>
>> -Ben
>
>
> __________________________________________________________________________
> OpenStack Development Mailing List (not for usage questions)
> Unsubscribe: OpenStack-dev-request at lists.openstack.org?subject:unsubscribe
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>