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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => juno-3

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https://bugs.launchpad.net/bugs/1302238

Title:
  throw exception if no configured affinity filter

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  After https://blueprints.launchpad.net/nova/+spec/instance-group-api-
  extension, nova has the feature of creating instance groups with
  affinity or anti-affinity policy and creating vm instance with
  affinity/anti-affinity  group.

  If did not enable ServerGroupAffinityFilter and
  ServerGroupAntiAffinityFilter, then the instance group will not able
  to leverage affinity/anti-affinity.

  Take the following case:
  1) Create a group with affinity
  2) Create two vms with this group
  3) The result is that those two vms was not created on the same host.

  We should  throw exception if using server group with no configured
  affinity filter

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