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[Felipe Reyes <1639230@xxxxxxxxxxxxxxxxxx>]

** Also affects: nova (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: nova (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1639230

Title:
  reschedule fails with ip already allocated error

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) newton series:
  Fix Committed
Status in nova package in Ubuntu:
  Fix Released

Bug description:
  Tried to create a server in a multi-host environment. The create
  failed on the first host that was attempted due to a ClientException
  raised by nova.volume.cinder.API.initialize_connection while trying to
  attach a volume. When the build was rescheduled on a different host,
  it should have realized that the network was already allocated by the
  first attempt and reused that, but the network_allocated=True from
  instance.system_metadata somehow disappeared, leading to the following
  exception that causes the reschedule to fail:

  2016-10-13 04:48:29.007 16273 WARNING nova.network.neutronv2.api [req-9b343ef7-e8d9-4a61-b86c-a61908afe4df 0688b01e6439ca32d698d20789d52169126fb41fb1a4ddafcebb97d854e836c9 94e1baed634145e0aade858973ae88e8 - - -] [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b] Neutron error creating port on network 5038a36b-cb1e-4a61-b26c-a05a80b37ed6
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b] Traceback (most recent call last):
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]   File "/usr/lib/python2.7/site-packages/nova/network/neutronv2/api.py", line 392, in _create_port_minimal
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]     port_response = port_client.create_port(port_req_body)
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]   File "/usr/lib/python2.7/site-packages/nova/network/neutronv2/api.py", line 98, in wrapper
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]     ret = obj(*args, **kwargs)
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]   File "/usr/lib/python2.7/site-packages/neutronclient/v2_0/client.py", line 750, in create_port
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]     return self.post(self.ports_path, body=body)
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]   File "/usr/lib/python2.7/site-packages/nova/network/neutronv2/api.py", line 98, in wrapper
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]     ret = obj(*args, **kwargs)
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]   File "/usr/lib/python2.7/site-packages/neutronclient/v2_0/client.py", line 365, in post
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]     headers=headers, params=params)
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]   File "/usr/lib/python2.7/site-packages/nova/network/neutronv2/api.py", line 98, in wrapper
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]     ret = obj(*args, **kwargs)
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]   File "/usr/lib/python2.7/site-packages/neutronclient/v2_0/client.py", line 300, in do_request
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]     self._handle_fault_response(status_code, replybody, resp)
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]   File "/usr/lib/python2.7/site-packages/nova/network/neutronv2/api.py", line 98, in wrapper
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]     ret = obj(*args, **kwargs)
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]   File "/usr/lib/python2.7/site-packages/neutronclient/v2_0/client.py", line 275, in _handle_fault_response
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]     exception_handler_v20(status_code, error_body)
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]   File "/usr/lib/python2.7/site-packages/neutronclient/v2_0/client.py", line 91, in exception_handler_v20
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]     request_ids=request_ids)
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b] Conflict: IP address 9.114.25.215 already allocated in subnet e2d1b84e-2308-48ab-9101-0d48721c9fd2
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b] Neutron server returns request_ids: ['req-682b2d6b-768f-413d-862c-32490cad5589']
  2016-10-13 04:48:29.007 16273 ERROR nova.network.neutronv2.api [instance: b85d6c6c-e385-4601-aa47-5c580f893c9b]

  found in newton

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