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[Rodolfo Alonso <1965807@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

This bug is related to https://bugs.launchpad.net/neutron/+bug/1954763.

There is a problem with the IPAM module, [1] and ML2 OVN driver. When a
port is created in "create_port_bulk", we first create the IPAM
allocations [1], to save time and DB accesses.

However, if one port fails in the driver call, the port is deleted. In
this port deletion, the IPAM reservation is deleted too. At the end of
"create_port_bulk", the previously created IPAM reservations are deleted
too (again). This is what is triggering the error in the Neutron server
[2]. The DB now has a port register, a IP allocation register but not an
IPAM allocation register. That prevents from deleting manually this port
(error 500).

Red Hat bugzilla reference:
https://bugzilla.redhat.com/show_bug.cgi?id=2065634

[1]https://review.opendev.org/q/I8877c658446fed155130add6f1c69f2772113c27
[2]https://paste.opendev.org/show/b6e3INfzhPTkOFW5fhPb/

** Affects: neutron
     Importance: Medium
     Assignee: Rodolfo Alonso (rodolfo-alonso-hernandez)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => Rodolfo Alonso (rodolfo-alonso-hernandez)

** Changed in: neutron
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1965807

Title:
  Bulk port creation breaks IPAM module when driver port creation fails

Status in neutron:
  New

Bug description:
  This bug is related to
  https://bugs.launchpad.net/neutron/+bug/1954763.

  There is a problem with the IPAM module, [1] and ML2 OVN driver. When
  a port is created in "create_port_bulk", we first create the IPAM
  allocations [1], to save time and DB accesses.

  However, if one port fails in the driver call, the port is deleted. In
  this port deletion, the IPAM reservation is deleted too. At the end of
  "create_port_bulk", the previously created IPAM reservations are
  deleted too (again). This is what is triggering the error in the
  Neutron server [2]. The DB now has a port register, a IP allocation
  register but not an IPAM allocation register. That prevents from
  deleting manually this port (error 500).

  Red Hat bugzilla reference:
  https://bugzilla.redhat.com/show_bug.cgi?id=2065634

  [1]https://review.opendev.org/q/I8877c658446fed155130add6f1c69f2772113c27
  [2]https://paste.opendev.org/show/b6e3INfzhPTkOFW5fhPb/

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