[openstack-dev] [all][tc][ptls] final stages of python 3 transition

Graham Hayes gr at ham.ie
Tue May 8 16:01:36 UTC 2018

On 08/05/18 16:53, Doug Hellmann wrote:
> Excerpts from Graham Hayes's message of 2018-05-08 16:28:46 +0100:
>> On 08/05/18 16:09, Zane Bitter wrote:
>>> On 30/04/18 17:16, Ben Nemec wrote:
>>>>> Excerpts from Doug Hellmann's message of 2018-04-25 16:54:46 -0400:
>>>>>> 1. Fix oslo.service functional tests -- the Oslo team needs help
>>>>>>     maintaining this library. Alternatively, we could move all
>>>>>>     services to use cotyledon (https://pypi.org/project/cotyledon/).
>>> I submitted a patch that fixes the py35 gate (which was broken due to
>>> changes between CPython 3.4 and 3.5), so once that merges we can flip
>>> the gate back to voting:
>>> https://review.openstack.org/566714
>>>> For everyone's awareness, we discussed this in the Oslo meeting today
>>>> and our first step is to see how many, if any, services are actually
>>>> relying on the oslo.service functionality that doesn't work in Python
>>>> 3 today.  From there we will come up with a plan for how to move forward.
>>>> https://bugs.launchpad.net/manila/+bug/1482633 is the original bug.
>>> These tests are currently skipped in both oslo_service and nova.
>>> (Equivalent tests were removed from Neutron and Manila on the principle
>>> that they're now oslo_service's responsibility.)
>>> This appears to be a series of long-standing bugs in eventlet:
>>> Python 3.5 failure mode:
>>> https://github.com/eventlet/eventlet/issues/308
>>> https://github.com/eventlet/eventlet/issues/189
>>> Python 3.4 failure mode:
>>> https://github.com/eventlet/eventlet/issues/476
>>> https://github.com/eventlet/eventlet/issues/145
>>> There are also more problems coming down the pipeline in Python 3.6:
>>> https://github.com/eventlet/eventlet/issues/371
>>> That one is resolved in eventlet 0.21, but we have that blocked by
>>> upper-constraints:
>>> http://git.openstack.org/cgit/openstack/requirements/tree/upper-constraints.txt#n135
>>> Given that the code in question relates solely to standalone WSGI
>>> servers with SSL and everything should have already migrated to Apache,
>>> and that the upstream is clearly overworked and unlikely to merge fixes
>>> any time soon (plus we would have to deal with the fallout of moving the
>>> upper constraint), I agree that it would be preferable if we could just
>>> ditch this functionality.
>> There are a few projects that have not migrated, and some that have
>> issues running in non standalone WSGI mode (due, ironically to eventlet)
>> We should probably get people to run these projects behind an reverse
>> proxy, and terminate SSL there, but right now we don't have that
>> documented.
> Do you know which projects?

I know of 2:

Designate - mainly due to the major lack of resources available during
the uwsgi goal period, and the level of work needed to unravel our
tooling to support it.

Glance - Has issues with image upload + uwsgi + eventlet [1]

I am sure there are probably others, but I know of these 2.

[1] https://docs.openstack.org/releasenotes/glance/unreleased.html#b1

> Doug
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