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[OpenStack Infra <1787331@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/592285
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=23ba1c690652832c655d57476630f02c268c87ae
Submitter: Zuul
Branch:    master

commit 23ba1c690652832c655d57476630f02c268c87ae
Author: Yikun Jiang <yikunkero@xxxxxxxxx>
Date:   Thu Aug 16 14:29:26 2018 +0800

    Make monkey patch work in uWSGI mode
    
    There was a eventlet.monkey_patch [1] when we launch a nova
    process(like nova-api, nova-compute), but it's invalid under
    the uwsgi mode.
    
    But there are concurrency requirements in the api service, such
    as, when listing instances cross multiple cells we're using
    greenthreads and oslo.db does a time.sleep to allow switching
    greenthreads [2].
    
    So, in this patch we add the monkey_patch in the uwsgi
    application setup and refactor the monkey patching to use common
    code.
    
    [1] https://github.com/openstack/nova/blob/233ea58/nova/cmd/__init__.py#L26
    [2] https://github.com/openstack/oslo.db/blob/9c66959/oslo_db/sqlalchemy/engines.py#L51
    
    Closes-bug: #1787331
    
    Change-Id: Ie7bf5d012e2ccbcd63c262ddaf739782afcdaf56


** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1787331

Title:
  The eventlet.monkey_patch is not valid under uwsgi mode

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  There was a eventlet.monkey_patch [1] when we launch a nova
  process(like nova-api, nova-compute), but it's invalid under the uwsgi
  mode.

  So, we need do same monkey_patch when we setup uwsgi appilication.

  [1]
  https://github.com/openstack/nova/blob/233ea58/nova/cmd/__init__.py#L26

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