[openstack-dev] [nova][gate][stable] How eventlet 0.16.1 broke the gate

Sean Dague sean at dague.net
Thu Jan 15 13:44:58 UTC 2015

On 01/15/2015 08:38 AM, Thierry Carrez wrote:
> Sean Dague wrote:
>> The policy decision to cap stable requirements was agreed to previously
>> (and at summit this year), it just needs someone to implement.
> +1
> We started to implement it (in Oslo libraries iirc) and then reverted
> because we encountered problems. We concluded a proper cross-project
> spec should be written so that we can try to anticipate issues better.
> I don't have a totally clear view of the issue(s) we encoutered last
> time, though. Could someone write a postmortem or point me to one ? Or
> was the upgrading components issue (fixed in
> https://review.openstack.org/#/c/142075/) the only problem ?

My recollection is the component upgrade order was a big problem, but
not the only one.

The other thing that happened was partial capping doesn't work, because
something else moves forward and breaks you from below. So the patch
will need to hit everything at once.

Unresolved entirely is the tertiary dependencies (not direct
dependencies of any OpenStack project). That will need another mechanism
to seed them before any installation happens.

Whether or not pip should be pinned is also a good question, especially
because pbr requires pip, so the install -U on pbr tends to uplift pip
even if it was previously downgraded.

That's the things I can think off from the top of my head.


Sean Dague

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