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[Zachary Ma <1720088@xxxxxxxxxxxxxxxxxx>]

Fix proposed to branch: stable/pike
Review: https://review.openstack.org/505356

** Changed in: nova
       Status: Incomplete => Fix Released

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https://bugs.launchpad.net/bugs/1720088

Title:
  delete vms, but ovs flow table is still residual

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  in Pike version, if I delete running vms, the ovs flow table will be
  still residual.

  for examples:

  the first, create vm, named pc1
  [root@bogon ~]# nova list
  +--------------------------------------+------+--------+------------+-------------+--------------+
  | ID                                   | Name | Status | Task State | Power State | Networks     |
  +--------------------------------------+------+--------+------------+-------------+--------------+
  | 2f91523c-6a4f-434a-a228-0d07ca735e6a | pc1  | ACTIVE | -          | Running     | net=5.5.5.13 |
  +--------------------------------------+------+--------+------------+-------------+--------------+

  the second,I directly delete the running virtual machine,

  [root@bogon ~]# nova list
  +----+------+--------+------------+-------------+----------+
  | ID | Name | Status | Task State | Power State | Networks |
  +----+------+--------+------------+-------------+----------+
  +----+------+--------+------------+-------------+----------+

  
  then the relevant flow table will be left.

  [root@bogon ~]# ovs-ofctl dump-flows br-int | grep 5.5.5.13
   cookie=0x8231b3d9ff6eecde, duration=189.590s, table=82, n_packets=0, n_bytes=0, idle_age=189, priority=70,ct_state=+est-rel-rpl,ip,reg6=0x1,nw_src=5.5.5.13 actions=conjunction(2,1/2)
   cookie=0x8231b3d9ff6eecde, duration=189.589s, table=82, n_packets=0, n_bytes=0, idle_age=189, priority=70,ct_state=+new-est,ip,reg6=0x1,nw_src=5.5.5.13 actions=conjunction(3,1/2)

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