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[Bug 1517006] [NEW] Can't create instances with flavors that have extra specs in a cell setup

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Public bug reported:

In a cell setup can't create instances with flavors that have extra specs like:
hw:numa_nodes
hw:mem_page_size


nova-cell in the "child cell" fails with:

2015-11-17 10:51:50.574 ERROR nova.cells.scheduler [req-f7dc64e6-a545-4c2c-bc57-4e4a2e86cf58 demo demo] Couldn't communicate with cell 'cell'
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler Traceback (most recent call last):
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler   File "/opt/stack/nova/nova/cells/scheduler.py", line 186, in _build_instances
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler     image, security_groups, block_device_mapping)
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler   File "/opt/stack/nova/nova/cells/scheduler.py", line 109, in _create_instances_here
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler     instance.update(instance_values)
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler   File "/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 727, in update
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler     setattr(self, key, value)
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler   File "/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 71, in setter
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler     field_value = field.coerce(self, name, value)
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler   File "/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/fields.py", line 189, in coerce
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler     return self._type.coerce(obj, attr, value)
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler   File "/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/fields.py", line 506, in coerce
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler     'valtype': obj_name})
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler ValueError: An object of type InstanceNUMATopology is required in field numa_topology, not a 
2015-11-17 10:51:50.574 TRACE nova.cells.scheduler 
2015-11-17 10:51:50.574 ERROR nova.cells.scheduler [req-f7dc64e6-a545-4c2c-bc57-4e4a2e86cf58 demo demo] Couldn't communicate with any cells


Reproduce steps:
1) Setup nova in order to use cells.

2) Create a flavor with the extra spec "hw:numa_nodes"
nova flavor-create m1.nano.numa2 30 64 1 1
nova flavor-key 30 set hw:numa_nodes=1

3) Create an instance with the new flavor


Actual Result:
Instance status: ERROR
Instance task state: scheduling

Trace in "child cell".


Tested in devstack (master).
Tested in Kilo.

** Affects: nova
     Importance: Undecided
         Status: New


** Tags: cells

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https://bugs.launchpad.net/bugs/1517006

Title:
  Can't create instances with flavors that have extra specs in a cell
  setup

Status in OpenStack Compute (nova):
  New

Bug description:
  In a cell setup can't create instances with flavors that have extra specs like:
  hw:numa_nodes
  hw:mem_page_size

  
  nova-cell in the "child cell" fails with:

  2015-11-17 10:51:50.574 ERROR nova.cells.scheduler [req-f7dc64e6-a545-4c2c-bc57-4e4a2e86cf58 demo demo] Couldn't communicate with cell 'cell'
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler Traceback (most recent call last):
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler   File "/opt/stack/nova/nova/cells/scheduler.py", line 186, in _build_instances
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler     image, security_groups, block_device_mapping)
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler   File "/opt/stack/nova/nova/cells/scheduler.py", line 109, in _create_instances_here
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler     instance.update(instance_values)
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler   File "/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 727, in update
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler     setattr(self, key, value)
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler   File "/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 71, in setter
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler     field_value = field.coerce(self, name, value)
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler   File "/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/fields.py", line 189, in coerce
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler     return self._type.coerce(obj, attr, value)
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler   File "/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/fields.py", line 506, in coerce
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler     'valtype': obj_name})
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler ValueError: An object of type InstanceNUMATopology is required in field numa_topology, not a 
  2015-11-17 10:51:50.574 TRACE nova.cells.scheduler 
  2015-11-17 10:51:50.574 ERROR nova.cells.scheduler [req-f7dc64e6-a545-4c2c-bc57-4e4a2e86cf58 demo demo] Couldn't communicate with any cells

  
  Reproduce steps:
  1) Setup nova in order to use cells.

  2) Create a flavor with the extra spec "hw:numa_nodes"
  nova flavor-create m1.nano.numa2 30 64 1 1
  nova flavor-key 30 set hw:numa_nodes=1

  3) Create an instance with the new flavor

  
  Actual Result:
  Instance status: ERROR
  Instance task state: scheduling

  Trace in "child cell".

  
  Tested in devstack (master).
  Tested in Kilo.

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Follow ups

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