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[Michael Still <mikal@xxxxxxxxxxx>]

** Tags added: libvirt

** Also affects: python-glanceclient
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1457339

Title:
  Nova compute error spawning instances with Kilo

Status in OpenStack Compute (Nova):
  New
Status in Python client library for Glance:
  New

Bug description:
  Just upgraded from Juno to Kilo and am now getting the error below on
  compute nodes when launching a new instance. Using Ubuntu 14.04 (cloud
  archive repo), KVM and Ceph. Not clear what's causing this, only know
  that it did work on Juno!

      Instance failed to spawn
       Traceback (most recent call last):
         File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 2442, in _build_resources
           yield resources
         File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 2314, in _build_and_run_instance
           block_device_info=block_device_info)
         File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2347, in spawn
           admin_pass=admin_password)
         File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2745, in _create_image
           instance, size, fallback_from_host)
         File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 5875, in _try_fetch_image_cache
           size=size)
         File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/imagebackend.py", line 231, in cache
           *args, **kwargs)
         File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/imagebackend.py", line 727, in create_image
           prepare_template(target=base, max_size=size, *args, **kwargs)
         File "/usr/lib/python2.7/dist-packages/oslo_concurrency/lockutils.py", line 445, in inner
           return f(*args, **kwargs)
         File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/imagebackend.py", line 221, in fetch_func_sync
           fetch_func(target=target, *args, **kwargs)
         File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2737, in clone_fallback_to_fetch
           backend.clone(context, disk_images['image_id'])
         File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/imagebackend.py", line 752, in clone
           include_locations=True)
         File "/usr/lib/python2.7/dist-packages/nova/image/api.py", line 93, in get
           show_deleted=show_deleted)
         File "/usr/lib/python2.7/dist-packages/nova/image/glance.py", line 301, in show
           _reraise_translated_image_exception(image_id)
         File "/usr/lib/python2.7/dist-packages/nova/image/glance.py", line 299, in show
           image = self._client.call(context, version, 'get', image_id)
         File "/usr/lib/python2.7/dist-packages/nova/image/glance.py", line 219, in call
           return getattr(client.images, method)(*args, **kwargs)
         File "/usr/lib/python2.7/dist-packages/glanceclient/v2/images.py", line 106, in get
           return self.model(**body)
         File "/usr/lib/python2.7/dist-packages/warlock/core.py", line 32, in __init__
           base_class.__init__(self, *args, **kwargs)
         File "/usr/lib/python2.7/dist-packages/warlock/model.py", line 35, in __init__
           raise ValueError(str(exc))
       ValueError: None is not of type u'string'
       
       Failed validating u'type' in schema[u'additionalProperties']:
           {u'type': u'string'}
       
       On instance[u'description']:
           None

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