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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: neutron
       Status: Fix Committed => Fix Released

** Changed in: neutron
    Milestone: None => kilo-3

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https://bugs.launchpad.net/bugs/1402698

Title:
  Deleting an HA router with interfaces attached leaves the DB in an
  inconsistent state

Status in OpenStack Neutron (virtual network service):
  Fix Released

Bug description:
  Steps to reproduce:
  Create HA router (Observe that HA ports were created)
  Attach an interface
  Delete router

  Result:
  The deletion fails because the router has an interface attached, however all of its HA ports were deleted, leaving the system in an inconsistent state. Any L3 agents that attempt to configure this HA router will fail because it doesn't have HA ports.

  Expected behavior:
  Deletion validations should occur before deleting any resources. The deletion should fail and the router should continue to exist properly, with HA ports and all.

  Reason:
  As per https://github.com/openstack/neutron/blob/master/neutron/db/l3_hamode_db.py#L411:

  When deleting a router, the call first reaches the L3 HA DB mixin,
  which deletes HA-specific resources first, in its own commit. It then
  calls to the super class, which will eventually try to delete the
  router object itself. If any deletion validation fails, the router
  object itself is not deleted, but the HA ports and their VRID
  allocations were already deleted and the transaction was commited.

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