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[D G Lee <1686041@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Force to evacuate ACTIVE status instances to another host(a host is
provided),we can find an error 'Timeout waiting for vif plugging
callback' on nova-compute log.

In nova-api log,we can find network-vif-plugged event send to source
compute,because nova-compute use NopClaim,not create MigrationContext,so
not send this event to dest compute in function
nova.compute.api._get_relevant_hosts(https://github.com/openstack/nova/blob/master/nova/compute/api.py#L4241).

In
https://github.com/openstack/nova/blob/master/nova/compute/manager.py#L2723,
using function NopClaim when the value of scheduled_node is None while
forcing evacuate ACTIVE instances to another
host.(https://github.com/openstack/nova/blob/master/nova/compute/api.py#L4113)

I think this is a bug.

** Affects: nova
     Importance: Undecided
         Status: New

** Summary changed:

- Force evacuate instances failed if a host is provided
+ Force to evacuate ACTIVE status instances failed if a host is provided

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https://bugs.launchpad.net/bugs/1686041

Title:
  Force to evacuate ACTIVE status instances failed if a host is provided

Status in OpenStack Compute (nova):
  New

Bug description:
  Force to evacuate ACTIVE status instances to another host(a host is
  provided),we can find an error 'Timeout waiting for vif plugging
  callback' on nova-compute log.

  In nova-api log,we can find network-vif-plugged event send to source
  compute,because nova-compute use NopClaim,not create
  MigrationContext,so not send this event to dest compute in function
  nova.compute.api._get_relevant_hosts(https://github.com/openstack/nova/blob/master/nova/compute/api.py#L4241).

  In
  https://github.com/openstack/nova/blob/master/nova/compute/manager.py#L2723,
  using function NopClaim when the value of scheduled_node is None while
  forcing evacuate ACTIVE instances to another
  host.(https://github.com/openstack/nova/blob/master/nova/compute/api.py#L4113)

  I think this is a bug.

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