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[Bug 2017912] [NEW] OVN trunk subport bouncing between compute while live-migrating

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Arnau Verdaguer <2017912@xxxxxxxxxxxxxxxxxx>
Date: Thu, 27 Apr 2023 15:17:35 -0000
Reply-to: Bug 2017912 <2017912@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx

Public bug reported:

While live-migrating a trunk VM, during the migration the subport will bounce between
the old compute and the new compute. At the end of the migration the subport will be
bound to the correct compute and it will work fine.

During the live-migration of a simple VM with a trunk port and a trunk subport you can
observe multiple PortBindingChassisEvent for a single subport:
```
[stack@undercloud-0 tmp]$ cat 1/server.log.1 | grep 'PortBindingChassisEvent' | grep 7705625c-1659-44f8-a045-346b0512a82a | wc -l
9
```

** Affects: neutron
     Importance: Undecided
     Assignee: Arnau Verdaguer (averdagu)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => Arnau Verdaguer (averdagu)

** Description changed:

  While live-migrating a trunk VM, during the migration the subport will bounce between
  the old compute and the new compute. At the end of the migration the subport will be
  bound to the correct compute and it will work fine.
  
- During the live-migration of a simple VM with a trunk port and a trunk subport you can observe multiple PortBindingChassisEvent for a single subport:
+ During the live-migration of a simple VM with a trunk port and a trunk subport you can
+ observe multiple PortBindingChassisEvent for a single subport:
  ```
  [stack@undercloud-0 tmp]$ cat 1/server.log.1 | grep 'PortBindingChassisEvent' | grep 7705625c-1659-44f8-a045-346b0512a82a | wc -l
  9
  ```

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https://bugs.launchpad.net/bugs/2017912

Title:
  OVN trunk subport bouncing between compute while live-migrating

Status in neutron:
  New

Bug description:
  While live-migrating a trunk VM, during the migration the subport will bounce between
  the old compute and the new compute. At the end of the migration the subport will be
  bound to the correct compute and it will work fine.

  During the live-migration of a simple VM with a trunk port and a trunk subport you can
  observe multiple PortBindingChassisEvent for a single subport:
  ```
  [stack@undercloud-0 tmp]$ cat 1/server.log.1 | grep 'PortBindingChassisEvent' | grep 7705625c-1659-44f8-a045-346b0512a82a | wc -l
  9
  ```

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