compute ovs agent crash on multinode

[Eduardo Gonzalez]

Only affect current master (pike)
From change https://review.openstack.org/#/c/460645/ , br-ex is not longer created at compute nodes when DVR is not used.

This causes that neutron-openvswitch-agent in compute nodes keep restarting.

If br-ex is not created, bridge_mappings in ml2 config file for non compute is not needed.

2017-05-05 07:46:36.145 7 INFO ovsdbapp.backend.ovs_idl.vlog [-] tcp:192.168.122.27:6640: connecting...
2017-05-05 07:46:36.146 7 INFO ovsdbapp.backend.ovs_idl.vlog [-] tcp:192.168.122.27:6640: connected
2017-05-05 07:46:36.192 7 INFO neutron.plugins.ml2.drivers.openvswitch.agent.openflow.native.ovs_bridge [-] Bridge br-int has datapath-ID 000056bafeb5844f
2017-05-05 07:46:43.209 7 INFO neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-76faa139-5a09-41db-a09d-fb18f2b33e22 - - - - -] Mapping physical network physnet1 to bridge br-ex
2017-05-05 07:46:43.210 7 ERROR neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-76faa139-5a09-41db-a09d-fb18f2b33e22 - - - - -] Bridge br-ex for physical network physnet1 does not exist. Agent terminated

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/462949

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/462949
Committed: https://git.openstack.org/cgit/openstack/kolla-ansible/commit/?id=2eeca32dae0b6a04b8fbcb08e5c3cc32cffdad8a
Submitter: Jenkins
Branch: master

commit 2eeca32dae0b6a04b8fbcb08e5c3cc32cffdad8a
Author: Eduardo Gonzalez <email address hidden>
Date: Fri May 5 15:56:51 2017 +0200

    Fix neutron-openvswitch-agent crash on multinode

    neutron-openvswitch-agent enter in restarting status in multinode
    deployments because br-ex is no longer created on compute nodes
    unless DVR is enabled.

    This change add a conditional to only add bridge_mappings when
    the node is in network or in compute when dvr is enabled.

    Change-Id: I9d49158127af7fd78ecbc3d64a7509d1e4ae5672
    Closes-Bug: #1688571

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/ocata
Review: https://review.openstack.org/470242

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/kolla-ansible 5.0.0.0b2 development milestone.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Christian Berendt (<email address hidden>) on branch: stable/ocata
Review: https://review.openstack.org/470242