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

Bug #1786451 reported by M V P Nitesh on 2018-08-10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
OpenStack Compute (nova)
Lee Yarwood

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/\", line 585, in build_instances
   File \"/opt/stack/nova/nova/conductor/\", line 720, in
     scheduler_utils.setup_instance_group(context, request_spec)
 \"/opt/stack/nova/nova/scheduler/\", line 836, in setup_instance_group

 request_spec.instance_group.hosts = list(group_info.hosts)
 ", "created": "2018-08-10T08:32:01Z"}

Getting this error in nova-cell-region and in nova-cell-child

Changed in nova:
assignee: nobody → Lee Yarwood (lyarwood)
status: New → In Progress
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