Public bug reported: When migrating instances should not have affinity with themselves.
This is most clearly seen with hard anti-affinity as an instance attempting to migrate to the same host would be unable to do so due to the presence of 'itself' on the host. (See bug #1558532). In the soft-affinity case the consequences are not so dire, but can lead to incorrect weights being calculated. This is due to the fact that the soft affinity weigher counts the instance that is being migrated when looking at the number of instances from the group on a host. See: https://github.com/openstack/nova/blob/master/nova/scheduler/weights/affinity.py#L49 ** Affects: nova Importance: Low Assignee: Mark Doffman (mjdoffma) Status: New ** Tags: scheduler ** Changed in: nova Importance: Undecided => Low ** Changed in: nova Assignee: (unassigned) => Mark Doffman (mjdoffma) ** Tags added: scheduler -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1564559 Title: Instances should not have soft-affinity with themselves. Status in OpenStack Compute (nova): New Bug description: When migrating instances should not have affinity with themselves. This is most clearly seen with hard anti-affinity as an instance attempting to migrate to the same host would be unable to do so due to the presence of 'itself' on the host. (See bug #1558532). In the soft-affinity case the consequences are not so dire, but can lead to incorrect weights being calculated. This is due to the fact that the soft affinity weigher counts the instance that is being migrated when looking at the number of instances from the group on a host. See: https://github.com/openstack/nova/blob/master/nova/scheduler/weights/affinity.py#L49 To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1564559/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
