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[Andrew Laski <andrew@xxxxxxxxxx>]

https://review.openstack.org/#/c/183199/ addressed this.

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

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https://bugs.launchpad.net/bugs/1527514

Title:
  cells：resize/migrate instance  failed in cells

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  1. version
  kilo 2015.1.0

  2. Relevant log files:

  2015-12-17 16:53:14.218 2695 ERROR nova.api.openstack [req-3cdc0eaf-673c-4d31-bf45-467d8d6ed77f f04e318acd7e4e5093c91e6dc74a28c3 53adc6d6825b43378d6ab89fc38051da - - -] Caught error: Object action create failed because: cannot create a Migration object without a migration_type set
  ...
  ...
  2015-12-17 16:53:14.218 2695 TRACE nova.api.openstack   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 2725, in _resize_cells_support
  2015-12-17 16:53:14.218 2695 TRACE nova.api.openstack     mig.create()
  2015-12-17 16:53:14.218 2695 TRACE nova.api.openstack   File "/usr/lib/python2.7/site-packages/nova/objects/base.py", line 208, in wrapper
  2015-12-17 16:53:14.218 2695 TRACE nova.api.openstack     return fn(self, *args, **kwargs)
  2015-12-17 16:53:14.218 2695 TRACE nova.api.openstack   File "/usr/lib/python2.7/site-packages/nova/objects/migration.py", line 105, in create
  2015-12-17 16:53:14.218 2695 TRACE nova.api.openstack     reason="cannot create a Migration object without a "
  2015-12-17 16:53:14.218 2695 TRACE nova.api.openstack ObjectActionError: Object action create failed because: cannot create a Migration object without a migration_type set

  More detailed log:
  http://paste.openstack.org/show/482270/

  3. Reproduce steps:
  create a new instance from image in cells, then resize or migrate the instance.

  Expected result:
  resize success

  Actual result:
  resize failed , Log in the second quarter

  4, In the process of the resize/migrate, _resize_cells_support will be
  call in nova/compute/api.py. in this func, a migration object will be
  create ,but now this object create failed because "without a
  migration_type", and leading to the resize/migate fail.

  So this is a serious bug If build and use cell environment

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