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[Russell Bryant <1299331@xxxxxxxxxxxxxxxxxx>]

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

** Changed in: nova
    Milestone: None => juno-2

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https://bugs.launchpad.net/bugs/1299331

Title:
  There isn't effect when attach/detach interface for paused instance

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  $ nova boot --flavor 1 --image 76ae1239-0973-44cf-9051-0e1bc8f41cdd
  --nic net-id=a15cfbed-86d8-4660-9593-46447cb9464e vm1

  $ nova list
  +--------------------------------------+------+--------+------------+-------------+-------------------+
  | ID                                   | Name | Status | Task State | Power State | Networks          |
  +--------------------------------------+------+--------+------------+-------------+-------------------+
  | f7e2877d-c7f5-4493-89d4-c68e9839a7ff | vm1  | ACTIVE | -          | Running     | private=10.0.0.22 |
  +--------------------------------------+------+--------+------------+-------------+-------------------+

  $ brctl show
  bridge name	bridge id		STP enabled	interfaces
  br-eth0		0000.fe989d8bd148	no		
  br-ex		0000.8a1d06d8854e	no		
  br-ex2		0000.4a98bdebe544	no		
  br-int		0000.229ad5053a41	no		
  br-tun		0000.2e58a2f0e047	no		
  docker0		8000.000000000000	no		
  lxcbr0		8000.000000000000	no		
  qbr0ad6a86e-d9		8000.9e5491dd719a	no		qvb0ad6a86e-d9
  							tap0ad6a86e-d9

  
  $ neutron port-list
  +--------------------------------------+------+-------------------+------------------------------------------------------------------------------------+
  | id                                   | name | mac_address       | fixed_ips                                                                          |
  +--------------------------------------+------+-------------------+------------------------------------------------------------------------------------+
  | 0ad6a86e-d967-424e-9bf5-e6821cc0cd0d |      | fa:16:3e:3a:3e:5a | {"subnet_id": "94575a05-796f-4ff5-b892-3c3b8231b303", "ip_address": "10.0.0.22"}   |
  | 1e6bed8d-aece-4d3e-abcc-3ad7957d6d72 |      | fa:16:3e:9e:dc:83 | {"subnet_id": "e5dbc790-c26f-45b7-b2c7-574f12ad8b41", "ip_address": "172.24.4.12"} |
  | 5f522a9a-2856-4a95-8bd8-c354c00abf0f |      | fa:16:3e:01:47:43 | {"subnet_id": "94575a05-796f-4ff5-b892-3c3b8231b303", "ip_address": "10.0.0.1"}    |
  | 6226f6d3-3814-469c-bf50-8c99dfec481e |      | fa:16:3e:46:0e:35 | {"subnet_id": "94575a05-796f-4ff5-b892-3c3b8231b303", "ip_address": "10.0.0.2"}    |
  | a3f2ab1c-a634-446d-8885-d7d8e5978fa1 |      | fa:16:3e:cf:02:d6 | {"subnet_id": "94575a05-796f-4ff5-b892-3c3b8231b303", "ip_address": "10.0.0.20"}   |
  | c10390a9-6f84-44f5-8a17-91cb330a9e12 |      | fa:16:3e:41:7c:34 | {"subnet_id": "e5dbc790-c26f-45b7-b2c7-574f12ad8b41", "ip_address": "172.24.4.15"} |
  | c814425c-be1a-4c06-a54b-1788c7c6fb31 |      | fa:16:3e:f5:fc:d3 | {"subnet_id": "e5dbc790-c26f-45b7-b2c7-574f12ad8b41", "ip_address": "172.24.4.2"}  |
  | ebd874b7-43e6-4d18-b0ed-f86bb349d8b9 |      | fa:16:3e:e6:b5:09 | {"subnet_id": "e5dbc790-c26f-45b7-b2c7-574f12ad8b41", "ip_address": "172.24.4.19"} |
  +--------------------------------------+------+-------------------+------------------------------------------------------------------------------------+

  
  $ nova pause vm1

  $ nova interface-detach vm1 0ad6a86e-d967-424e-9bf5-e6821cc0cd0d

  $ nova list
  +--------------------------------------+------+--------+------------+-------------+----------+
  | ID                                   | Name | Status | Task State | Power State | Networks |
  +--------------------------------------+------+--------+------------+-------------+----------+
  | f7e2877d-c7f5-4493-89d4-c68e9839a7ff | vm1  | PAUSED | -          | Paused      |          |
  +--------------------------------------+------+--------+------------+-------------+----------+

  $ brctl show
  bridge name	bridge id		STP enabled	interfaces
  br-eth0		0000.fe989d8bd148	no		
  br-ex		0000.8a1d06d8854e	no		
  br-ex2		0000.4a98bdebe544	no		
  br-int		0000.229ad5053a41	no		
  br-tun		0000.2e58a2f0e047	no		
  docker0		8000.000000000000	no		
  lxcbr0		8000.000000000000	no		

  
  But tap still alive

  $ ifconfig|grep tap0ad6a86e-d9
  tap0ad6a86e-d9 Link encap:Ethernet  HWaddr fe:16:3e:3a:3e:5a

  And login into instance, exec 'ifconfig', it will found the interface
  still attach to the instance

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