On Trusty (14.04) messaging does not work

[James Li]

Our Trusty gate (non-voting for now) always fails on functional tests:

http://logs.openstack.org/85/117885/7/check/gate-solum-devstack-dsvm/246e206/logs/devstack-gate-post-test-hook.txt.gz

The reason is messaging does not work.

[James Li (james-li-3)]

This is because a package called 'librabbitmq' is newly available on 14.04, and kombu selects it as transport client. For some reason, librabbitmq does not work for us.

A workaround is removing librabbitmq, which force kombu to use the traditional py-amqp.

[Paul Czarkowski (paulcz)]

In Ubuntu 14.04 python-kombu depends in python-librabbitmq

In Ubuntu 12.04 it does not.

This means we can't really just remove python-librabbitmq without constantly fighting system packages.

here's the code in kombu that detects if eventlet is being imported and sets environment to not allow librabbitmq - https://github.com/celery/kombu/blob/39a6491013fc35325bfb0517e5343a2f7d32aa31/kombu/syn.py#L23-L33

We can either monkeypatch in kombu to return this in any case, or we can just include eventlet but never use it.

I'll have a patch shortly to perform the latter.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/119391
Committed: https://git.openstack.org/cgit/stackforge/solum/commit/?id=1218313875efbdf6f4de4ac13f51fe1802f4a97e
Submitter: Jenkins
Branch: master

commit 1218313875efbdf6f4de4ac13f51fe1802f4a97e
Author: Paul Czarkowski <email address hidden>
Date: Thu Sep 4 15:46:16 2014 -0500

    require eventlet in RPC service.

    Ubuntu 14.04 forces librabbitmq when kombu is used
    Unfortunately it forces a version that has a crash
    bug. Calling eventlet.monkey_patch() tells kombu
    to use libamqp instead.

    Change-Id: I9bc2073f620391e5d0b384142a4d4b0ad7104fcf
    Closes-Bug: 1365679