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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

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

** Changed in: nova
    Milestone: None => juno-rc1

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https://bugs.launchpad.net/bugs/1274183

Title:
  "nova host-servers-migrate <host>" Migrate instances on free compute
  in error status

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  {"build_id": "2014-01-29_13-30-05", "ostf_sha":
  "338ddf840c229918d1df8c6597588b853d02de4c", "build_number": "67",
  "nailgun_sha": "3463912a986465133058a24c615c3548cef53cac",
  "fuelmain_sha": "7d8768f2ac7e1e54d16c135e4ebd64722e49179e",
  "astute_sha": "200f68381327d955428c371582c03a97bfec3154", "release":
  "4.1", "fuellib_sha": "73e74f0c449ad86b3da922c8bd5eb333eac94489"}

  
  "nova host-servers-migrate <host>" Migrate instances on free compute in error status

  Steps to reproduce 
  1. Get  ISO#67
  2. Cluster configuration:   Ubuntu, simple, 	1Controller, (2+ceph)Computes,	Ceph for images,	Neutron GRE.
  3. Create  Instance check on wich compute it is.  
  4. On controller execute command "nova --debug host-servers-migrate <host>" host should be the name of  compute with created instance.

  
  Expected result:
  Instance should migrate and be in Active status

  Actual result: 
  After migration instance became in Error state.

  compute node on wich should be migrated this instance contain
  following:

  <180>Jan 29 16:12:16 node-3 nova-nova.compute.manager AUDIT: Migrating
  <182>Jan 29 16:12:18 node-3 nova-nova.virt.libvirt.driver INFO: Creating image
  <179>Jan 29 16:12:19 node-3 nova-nova.virt.libvirt.imagebackend ERROR: error opening rbd image /var/lib/nova/instances/_base/4e3fb6726c8ee72072724a16179d5e400c712864
  Traceback (most recent call last):
    File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/imagebackend.py", line 467, in __init__
      read_only=read_only)
    File "/usr/lib/python2.7/dist-packages/rbd.py", line 351, in __init__
      raise make_ex(ret, 'error opening image %s at snapshot %s' % (name, snapshot))
  ImageNotFound: error opening image /var/lib/nova/instances/_base/4e3fb6726c8ee72072724a16179d5e400c712864 at snapshot None
  <179>Jan 29 16:12:19 node-3 nova-nova.compute.manager ERROR: Setting instance vm_state to ERROR
  Traceback (most recent call last):
    File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 3153, in finish_resize
      disk_info, image)
    File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 3121, in _finish_resize
      block_device_info, power_on)

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