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[OpenStack Infra <1597561@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/335755
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=537e2f540a5c4cedc657bd1b996a367ac9c3ec65
Submitter: Jenkins
Branch:    master

commit 537e2f540a5c4cedc657bd1b996a367ac9c3ec65
Author: Carl Baldwin <carl.baldwin@xxxxxxx>
Date:   Thu Jun 30 01:19:38 2016 +0000

    DVR: Ensure that only one fg device can exist at a time in fip ns
    
    Change-Id: I3e78c8d497f9187ba64dcce317f8c709067a11e6
    Closes-Bug: #1597561


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

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https://bugs.launchpad.net/bugs/1597561

Title:
  L3 agent allows multiple gateway ports in fip namespace

Status in neutron:
  Fix Released

Bug description:
  At the end of deleting a GW port for a router, l3_dvr_db.py will look
  for any more router gw ports on the external network.  If there are
  none, then it calls delete_floatingip_agent_gateway_port [1].  This
  should fan out to all l3 agents on all compute nodes [2].  Each agent
  should then delete the port [3].

  In some cases, the fip namespace and the gateway port are not deleted.
  I don't know where things are going wrong.  This seems pretty
  straight-forward.  Do some agents miss the fanout?  We know at least
  some of them are getting the fanout.  So, it is definitely being sent.

  When I checked, the port had been deleted from the database.  The fact
  that a new one is created supports this because if one existed in the DB
  already then it would be returned.

  
  [1] https://github.com/openstack/neutron/blob/d3cd20151a67289f023875de682a6d3c4ccee645/neutron/db/l3_dvr_db.py#L179
  [2] https://github.com/openstack/neutron/blob/d3cd20151a67289f023875de682a6d3c4ccee645/neutron/api/rpc/agentnotifiers/l3_rpc_agent_api.py#L166
  [3] https://github.com/openstack/neutron/blob/d3cd20151a67289f023875de682a6d3c4ccee645/neutron/agent/l3/dvr.py#L73

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