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[Sylvain Bauza <sbauza@xxxxxxx>]

As per https://docs.openstack.org/nova/latest/user/cells.html#status the current status for Cells V1 is *DEPRECATED*.
As you can see above, only regressions that aren't due to Cells V1 will be fixed, but this specific bug doesn't meet the criterias. As moving from Cells v1 to v2 or not using Cells means that the problem doesn't exist implies that there will be no resolution.

Closing the bug accordingly.

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

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https://bugs.launchpad.net/bugs/1786451

Title:
  Nova Instance creation is failing with  request_spec.instance_group
  appears to be None

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

Bug description:
  I'm trying to create a magnum cluster on Devstack(both Queens and
  master). Cluster creation is failing.

  Nova Instance is going to error state with the below error:

  {"message": "'NoneType' object has no attribute 'hosts'", "code": 500, "details": "  File           
  \"/opt/stack/nova/nova/conductor/manager.py\", line 585, in build_instances                         
       instance_uuids,                                                                                 
   return_alternates=True)                                                                             
     File \"/opt/stack/nova/nova/conductor/manager.py\", line 720, in                                  
   _schedule_instances                                                                                 
       scheduler_utils.setup_instance_group(context, request_spec)                                     
     File                                                                                              
   \"/opt/stack/nova/nova/scheduler/utils.py\", line 836, in setup_instance_group                      
                                                                                                       
   request_spec.instance_group.hosts = list(group_info.hosts)                                          
   ", "created": "2018-08-10T08:32:01Z"}    

  Getting this error http://paste.openstack.org/show/727798/ in nova-
  cell-region and http://paste.openstack.org/show/727799/  in nova-cell-
  child

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