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[OpenStack Infra <1980948@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/c/openstack/os-vif/+/848949
Committed: https://opendev.org/openstack/os-vif/commit/771dfffcd90dcd7c8c95c41744092f5ad4917be3
Submitter: "Zuul (22348)"
Branch:    master

commit 771dfffcd90dcd7c8c95c41744092f5ad4917be3
Author: Sean Mooney <work@xxxxxxxxxxxxxxx>
Date:   Thu Jul 7 12:52:41 2022 +0100

    update ci since linuxbridge is now experimental
    
    neutron now considers linuxbridge to be experimental
    This change enables the linuxbridge feature in the
    linuxbridge job. we do not currently declare the
    linuxbridge os-vif plug as experimental as it has
    been stable for many release and we do not have an
    experimental concept in os-vif.
    
    Change-Id: Ia275d1c3a9a9cf63238cf354c8e7d93ed59097a2
    Closes-Bug: #1980948


** Changed in: os-vif
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1980948

Title:
  adapt ci to neutron making linux bridge experimental

Status in OpenStack Compute (nova):
  In Progress
Status in os-vif:
  Fix Released

Bug description:
  tl;dr neutron now considers linuxbridge which uses to be the default mech driver in docs to be experimental and it is now guarded by a config flag.
  we do not set it in our jobs that have the mech driver loaded but not used so neutron fails to start.


  recently i noticed that gate jobs were failing with

  + functions-common:test_with_retry:2384    :   timeout 60 sh -c 'while ! wget  --no-proxy -q -O- http://10.209.98.53:19696; do sleep 0.5; done'
  + functions-common:test_with_retry:2385    :   die 2385 'Neutron did not start'

  
  dining into this a little more we see

  Jul 06 16:21:46.635396 ubuntu-focal-rax-ord-0030301377 neutron-
  server[90491]: INFO neutron.plugins.ml2.managers [-] Configured
  mechanism driver names: ['openvswitch', 'linuxbridge']

  Jul 06 16:21:46.640517 ubuntu-focal-rax-ord-0030301377 neutron-
  server[90491]: ERROR neutron.common.experimental [-] Feature
  'linuxbridge' is experimental and has to be explicitly enabled in
  'cfg.CONF.experimental'

  the nova-ovs-hybrid-plug and nova-next jobs both enable the
  linuxbridge mech driver but don't actually use it since they only
  deploy ovs.

  https://github.com/openstack/nova/blob/512fbdfa9933f2e9b48bcded537ffb394979b24b/.zuul.yaml#L138=
  https://github.com/openstack/nova/blob/512fbdfa9933f2e9b48bcded537ffb394979b24b/.zuul.yaml#L394=

  7 days ago 
  https://github.com/openstack/neutron/commit/7f0413c84c4515cd2fae31d823613c4d7ea43110
  merged moving linux bridge to experimental

  so all jobs that have it enabled either need to remove it form the
  mech drivers list or enable it in the config via the new option.

  
  for nova-next and nova-ovs-hybrid-plug we can just remove the driver form the list for os-vif
  the os-vif-linuxbridge need to enable it via the new config option

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