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[OpenStack Infra <1970216@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/c/openstack/neutron/+/839218
Committed: https://opendev.org/openstack/neutron/commit/dcbc4beb9e8e9b2695fa76015a33f651f904f280
Submitter: "Zuul (22348)"
Branch:    master

commit dcbc4beb9e8e9b2695fa76015a33f651f904f280
Author: labedz <krzysztof.tomaszewski@xxxxxxxxxxxx>
Date:   Mon Apr 25 09:35:47 2022 +0000

    Use monkey_patch for neutron API server.
    
    Neutron API server was not using eventlet monkey patch
    thus eventlet threads couldn't be properly yielded.
    
    This patch set API neutron server like other monkey patched
    neutron services: neutron-server and neutron-rpc-server.
    
    NOTE: this change needs apache service restart. Apache
    mod_wsgi auto reload can lead to SSL RecursionError.
    
    Co-Authored-By: Szymon Wroblewski <szymon.wroblewski@xxxxxxxxxxxx>
    Closes-Bug: 1970216
    Change-Id: Ib62c049cc521a548ab7e7e9584b19bdaa67b1c9d


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

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https://bugs.launchpad.net/bugs/1970216

Title:
  not sending Nova notification when using neutron API on mod_wsgi

Status in neutron:
  Fix Released

Bug description:
  When using Neutron API server with Apache mod_wsgi then
  notification to Nova are not always send and lost.

  How to reproduce: Ubuntu 20.04; upstream devstack master configured
  with Apache mod_wsgi [1]

  stack@devstack11:~$ openstack server create --availability-zone nova:devstack11 --net public --key-name test --flavor ds512M --image ubuntu t1
  stack@devstack11:~$ openstack port create --net private test_port; openstack server add port t1 test_port

  VM get it's port properly:

  stack@devstack11:~/devstack$ openstack port show test_port -c id -c device_id
  +-----------+--------------------------------------+
  | Field     | Value                                |
  +-----------+--------------------------------------+
  | device_id | 59d7e21b-7d43-4ee6-a82b-e43d12c6e9ae |
  | id        | 4ed67e46-535e-4a51-af95-f46497ecfdb4 |
  +-----------+--------------------------------------+

  stack@devstack11:/usr/lib/cgi-bin/neutron$ sudo virsh domiflist instance-00000015
   Interface        Type       Source   Model    MAC
  ------------------------------------------------------------------
   tapbef7c488-e4   ethernet   -        virtio   fa:16:3e:d1:23:72
   tap4ed67e46-53   ethernet   -        virtio   fa:16:3e:60:3f:1a

  but when deleting port from neutron API:

  stack@devstack11:~/neutron$ openstack port delete test_port

  on libvirt:

  stack@devstack11:/usr/lib/cgi-bin/neutron$ sudo virsh domiflist instance-00000015
   Interface        Type       Source   Model    MAC
  ------------------------------------------------------------------
   tapbef7c488-e4   ethernet   -        virtio   fa:16:3e:d1:23:72
   tap4ed67e46-53   ethernet   -        virtio   fa:16:3e:60:3f:1a

  and on neutron side:
  stack@devstack11:~/devstack$ openstack port show test_port -c id -c device_id
  No Port found for test_port

  after few tries you can end up with:

  stack@devstack11:~/neutron$ openstack port show test_port -c id
  No Port found for test_port

  and

  stack@devstack11:/usr/lib/cgi-bin/neutron$ sudo virsh domiflist instance-00000015
   Interface        Type       Source   Model    MAC
  ------------------------------------------------------------------
   tapbef7c488-e4   ethernet   -        virtio   fa:16:3e:d1:23:72
   tap4ed67e46-53   ethernet   -        virtio   fa:16:3e:60:3f:1a
   tap2b20446c-3d   ethernet   -        virtio   fa:16:3e:22:6c:19
   tapea396111-d3   ethernet   -        virtio   fa:16:3e:c3:38:4a

  [1] https://docs.openstack.org/neutron/yoga/admin/config-
  wsgi.html#neutron-api-behind-mod-wsgi

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