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[Claudiu Belu <cbelu@xxxxxxxxxxxxxxxxxxxxxx>]

Public bug reported:

A recent patch [1] has merged in nova, which sanitizes the nova instance
object, making it picklable. The sanitized instance object no longer has
a _context attribute, which means that lazy-loading attributes are no
longer loadable [2].

This can be an issue whenever a config drive has to be built for an
instance, as InstanceMetadata.metadata_for_config_drive needs some
unloaded attributes (device_metadata).

This issue has been seen to affect mostly rebuild, unshelve, rescue
operations.


[1] https://review.openstack.org/#/c/478991/
[2] http://paste.openstack.org/show/614328/

Logs: http://64.119.130.115/nova/479245/1/Hyper-
V_logs/c2-r21-u36-n02-compute02/nova-compute.log.gz

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1702150

Title:
  Instance sanitization in InstanceMetadata causes
  metadata_for_config_drive to fail

Status in OpenStack Compute (nova):
  New

Bug description:
  A recent patch [1] has merged in nova, which sanitizes the nova
  instance object, making it picklable. The sanitized instance object no
  longer has a _context attribute, which means that lazy-loading
  attributes are no longer loadable [2].

  This can be an issue whenever a config drive has to be built for an
  instance, as InstanceMetadata.metadata_for_config_drive needs some
  unloaded attributes (device_metadata).

  This issue has been seen to affect mostly rebuild, unshelve, rescue
  operations.

  
  [1] https://review.openstack.org/#/c/478991/
  [2] http://paste.openstack.org/show/614328/

  Logs: http://64.119.130.115/nova/479245/1/Hyper-
  V_logs/c2-r21-u36-n02-compute02/nova-compute.log.gz

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