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[Sean Dague <sean@xxxxxxxxx>]

Cells v1 is frozen on function. Server groups was never implemented for
cells.

** Tags added: cells

** Changed in: nova
       Status: New => Won't Fix

** Changed in: nova
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1547308

Title:
  can not find server group on child cell when building instance on it

Status in OpenStack Compute (nova):
  Won't Fix

Bug description:
  Version:
  Kilo

  When I was trying to build instance indicating server group on my child cell, I used the following command:
  nova boot --flavor m1.tiny --image cirros-0.3.4-x86_64 --nic net-id=59c9203b-61a4-44a7-9ccf-76894e270092 test1 --hint target_cell='api_cell!child_cell' --

  hint group=d37a1bcc-51fb-47de-81f3-113b96c5368f

  But build failed because child cell can't find the group server id.
  Here are logs in nova-conductor.log:

  2016-02-19 11:00:49.174 21735 ERROR nova.scheduler.utils [req-
  3334943a-e6c8-4674-91bd-b86428ecf7ca 0e01d65358f843958b5ea1b9fa13e1c8

  9f999506968d4c77ba32a00502f2836b - - -] [instance:
  8d8e6381-ad27-4686-9723-157ffd953b55] Error from last host: zte-
  VirtualBox (node zte-VirtualBox):

  [u'Traceback (most recent call last):\n', u'  File "/usr/lib/python2.7
  /dist-packages/nova/compute/manager.py", line 2218, in
  _do_build_and_run_instance\n

  filter_properties)\n', u'  File "/usr/lib/python2.7/dist-
  packages/nova/compute/manager.py", line 2360, in
  _build_and_run_instance\n

  instance_uuid=instance.uuid, reason=six.text_type(e))\n',
  u'RescheduledException: Build of instance
  8d8e6381-ad27-4686-9723-157ffd953b55 was re-scheduled:

  Instance group d37a1bcc-51fb-47de-81f3-113b96c5368f could not be
  found.\nTraceback (most recent call last):\n\n  File
  "/usr/lib/python2.7/dist-

  packages/nova/conductor/manager.py", line 422, in _object_dispatch\n
  return getattr(target, method)(*args, **kwargs)\n\n  File
  "/usr/lib/python2.7/dist-

  packages/nova/objects/base.py", line 163, in wrapper\n    result =
  fn(cls, context, *args, **kwargs)\n\n  File "/usr/lib/python2.7/dist-

  packages/nova/objects/instance_group.py", line 80, in get_by_uuid\n
  db_inst = db.instance_group_get(context, uuid)\n\n  File
  "/usr/lib/python2.7/dist-

  packages/nova/db/api.py", line 809, in instance_group_get\n    return
  IMPL.instance_group_get(context, group_uuid)\n\n  File
  "/usr/lib/python2.7/dist-

  packages/nova/db/sqlalchemy/api.py", line 6186, in
  instance_group_get\n    raise
  exception.InstanceGroupNotFound(group_uuid=group_uuid)

  \n\nInstanceGroupNotFound: Instance group d37a1bcc-51fb-47de-
  81f3-113b96c5368f could not be found.\n\n']

  In API cell nova database:
  MariaDB [nova]> select * from instance_groups;
  +---------------------+------------+------------+---------+----+----------------------------------+----------------------------------+---------------------

  -----------------+--------+
  | created_at          | updated_at | deleted_at | deleted | id | user_id                          | project_id                       | uuid                  

                 | name   |
  +---------------------+------------+------------+---------+----+----------------------------------+----------------------------------+---------------------

  -----------------+--------+
  | 2016-01-26 09:06:06 | NULL       | NULL       |       0 |  1 | 0e01d65358f843958b5ea1b9fa13e1c8 | 9f999506968d4c77ba32a00502f2836b | d37a1bcc-51fb-47de-

  81f3-113b96c5368f | group1 |
  +---------------------+------------+------------+---------+----+----------------------------------+----------------------------------+---------------------

  -----------------+--------+
  1 row in set (0.00 sec)

  
  In Child cell nova database:
  MariaDB [nova]> select * from instance_groups;
  Empty set (0.00 sec)

  
  There is no this instance_group in child cell database.This is the caustion of above error.

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