[Bug 1913736] Re: ovn-host service stop doesn't clean up all ovn-controller pids

[Corey Bryant]

** Attachment added: "stop-start-good.txt"
   https://bugs.launchpad.net/ubuntu/+source/ovn/+bug/1913736/+attachment/5458060/+files/stop-start-good.txt

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https://bugs.launchpad.net/bugs/1913736

Title:
  ovn-host service stop doesn't clean up all ovn-controller pids

Status in ovn package in Ubuntu:
  New

Bug description:
  I noticed this issue with the ovn-chassis charm's pause/resume tests
  failing. Pause will stop the ovn-host service and the test will check
  if any ovn-controller pids exist after the stop, and in fact they did
  still exist.

  Stopping and starting ovn-host service is fine if openvswitch-switch
  hasn't been restarted. The ovn-controller pids get cleaned up when
  ovn-host is stopped. For example:

  https://paste.ubuntu.com/p/gq9VXWN25y/
  The same details are in the attached stop-start-good.txt file.

  However, if openvswitch-switch is restarted prior to the stop/start of
  ovn-host, it seems to cause issues where ovn-controller pids don't get
  cleaned up. For example:

  https://paste.ubuntu.com/p/Tn6wzY7gWH/
  The same details are in the attached stop-start-bad.txt file.

  I haven't looked into it much but wondering if it may be an issue in
  the upstream utilities/ovn-ctl script.

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