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[Jay Lau <jay.lau.513@xxxxxxxxx>]

Public bug reported:

liugya@liugya-ubuntu:~/src/nova-ce$ nova  aggregate-set-metadata 1 a=a1
Aggregate 1 has been successfully updated.
+----+------+-------------------+-------+----------+
| Id | Name | Availability Zone | Hosts | Metadata |
+----+------+-------------------+-------+----------+
| 1  | agg1 | None              |       | 'a=a1'   |
+----+------+-------------------+-------+----------+
liugya@liugya-ubuntu:~/src/nova-ce$ nova  aggregate-set-metadata 1 a

(Pdb) n
> /opt/stack/nova/nova/objects/aggregate.py(100)update_metadata()
-> compute_utils.notify_about_aggregate_update(context,
(Pdb) n
> /opt/stack/nova/nova/objects/aggregate.py(101)update_metadata()
-> "updatemetadata.start",
(Pdb) n
> /opt/stack/nova/nova/objects/aggregate.py(102)update_metadata()
-> payload)
(Pdb) payload
{'meta_data': {u'a': None}, 'aggregate_id': 1}
(Pdb) n

> /opt/stack/nova/nova/objects/aggregate.py(118)update_metadata()
-> payload['meta_data'] = to_add
(Pdb) 
> /opt/stack/nova/nova/objects/aggregate.py(119)update_metadata()
-> compute_utils.notify_about_aggregate_update(context,
(Pdb) 
> /opt/stack/nova/nova/objects/aggregate.py(120)update_metadata()
-> "updatemetadata.end",
(Pdb) 
> /opt/stack/nova/nova/objects/aggregate.py(121)update_metadata()
-> payload)
(Pdb) payload
{'meta_data': {}, 'aggregate_id': 1} <<< meta_data is empty, this caused 3rd party do not know which meta_data was now removed after get notification of updatemetadata.end

** Affects: nova
     Importance: Undecided
     Assignee: Jay Lau (jay-lau-513)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => Jay Lau (jay-lau-513)

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https://bugs.launchpad.net/bugs/1269684

Title:
  payload is empty when remove metadata with event updatemetadata.end

Status in OpenStack Compute (Nova):
  New

Bug description:
  liugya@liugya-ubuntu:~/src/nova-ce$ nova  aggregate-set-metadata 1 a=a1
  Aggregate 1 has been successfully updated.
  +----+------+-------------------+-------+----------+
  | Id | Name | Availability Zone | Hosts | Metadata |
  +----+------+-------------------+-------+----------+
  | 1  | agg1 | None              |       | 'a=a1'   |
  +----+------+-------------------+-------+----------+
  liugya@liugya-ubuntu:~/src/nova-ce$ nova  aggregate-set-metadata 1 a

  (Pdb) n
  > /opt/stack/nova/nova/objects/aggregate.py(100)update_metadata()
  -> compute_utils.notify_about_aggregate_update(context,
  (Pdb) n
  > /opt/stack/nova/nova/objects/aggregate.py(101)update_metadata()
  -> "updatemetadata.start",
  (Pdb) n
  > /opt/stack/nova/nova/objects/aggregate.py(102)update_metadata()
  -> payload)
  (Pdb) payload
  {'meta_data': {u'a': None}, 'aggregate_id': 1}
  (Pdb) n

  > /opt/stack/nova/nova/objects/aggregate.py(118)update_metadata()
  -> payload['meta_data'] = to_add
  (Pdb) 
  > /opt/stack/nova/nova/objects/aggregate.py(119)update_metadata()
  -> compute_utils.notify_about_aggregate_update(context,
  (Pdb) 
  > /opt/stack/nova/nova/objects/aggregate.py(120)update_metadata()
  -> "updatemetadata.end",
  (Pdb) 
  > /opt/stack/nova/nova/objects/aggregate.py(121)update_metadata()
  -> payload)
  (Pdb) payload
  {'meta_data': {}, 'aggregate_id': 1} <<< meta_data is empty, this caused 3rd party do not know which meta_data was now removed after get notification of updatemetadata.end

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