Create a backport of 'interface-monitor isn't active' fix to Mitaka

[Ruslan Aliev]

There is need to provide backport fix of 'Interface monitor is not active' bug to Mitaka version of python-neutron package, because customer faced with this problem on environment.

Launchpad link - https://bugs.launchpad.net/neutron/+bug/1584647
Patchset link - https://review.openstack.org/#/c/319788/

[Fuel Devops McRobotson (fuel-devops-robot)]

Fix proposed to branch: 9.0/mitaka
Change author: Hong Hui Xiao <email address hidden>
Review: https://review.fuel-infra.org/40417

[Fuel Devops McRobotson (fuel-devops-robot)]

Reviewed: https://review.fuel-infra.org/40417
Submitter: Pkgs Jenkins <email address hidden>
Branch: 9.0/mitaka

Commit: ea34ddd7eeb5f9ad553dfab804ebfa43967a7fc2
Author: Hong Hui Xiao <email address hidden>
Date: Fri Feb 8 11:48:58 2019

Wait for ovsdb_monitor to be active before use it

There is a race between ovsdb_monitor becoming active and using
ovsdb_monitor. Sometimes, code [1] will be hit at ovs-agent startup.

The fix here will block the start of ovsdb_monitor, so that the
following code to use the ovsdb_monitor will have ovsdb_monitor be
active.

[1] https://goo.gl/RJX4I5
Closes-bug: #1584647
Closes-bug: 1815112

Change-Id: I23aef0db46869930c169d6caf47aa44e9c3641ff

[Mikhail Samoylov (msamoylov)]

Code applied to env.
root@node-1:~# grep 'self._monitor.start(block=True)' /usr/lib/python2.7/dist-packages/neutron/agent/linux/polling.py
        self._monitor.start(block=True)

[Mikhail Samoylov (msamoylov)]

root@node-1:~# grep 'self._monitor.start(block=True)' /usr/lib/python2.7/dist-packages/neutron/agent/linux/polling.py
        self._monitor.start(block=True)
root@node-1:~# apt-cache policy python-neutron
python-neutron:
  Installed: 2:8.4.0-2~u14.04+mos30
  Candidate: 2:8.4.0-2~u14.04+mos30
  Version table:
 *** 2:8.4.0-2~u14.04+mos30 0
       1050 http://mirror.seed-us1.fuel-infra.org/mos-repos/ubuntu/snapshots/9.0-2019-04-02-072321/ mos9.0-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     2:8.4.0-2~u14.04+mos29 0
       1050 http://mirror.seed-us1.fuel-infra.org/mos-repos/ubuntu/snapshots/9.0-2019-04-02-072321/ mos9.0-updates/main amd64 Packages
       1050 http://mirror.fuel-infra.org/mos-repos/ubuntu/9.2/ mos9.0-updates/main amd64 Packages
     2:8.1.1-1~u14.04+mos21 0
       1050 http://10.109.0.2:8080/mitaka-9.0/ubuntu/x86_64/ mos9.0/main amd64 Packages
     1:2014.1.5-0ubuntu8 0
       1001 http://mirror.seed-us1.fuel-infra.org/pkgs/snapshots/ubuntu-2019-02-06-000001/ trusty-updates/main amd64 Packages
     1:2014.1.3-0ubuntu1.1 0
       1001 http://mirror.seed-us1.fuel-infra.org/pkgs/snapshots/ubuntu-2019-02-06-000001/ trusty-security/main amd64 Packages
     1:2014.1-0ubuntu1 0
       1001 http://mirror.seed-us1.fuel-infra.org/pkgs/snapshots/ubuntu-2019-02-06-000001/ trusty/main amd64 Packages