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[Bug 1707021] Re: Ironic Flavor Migration can miss instances

 

** Changed in: nova
     Assignee: Sylvain Bauza (sylvain-bauza) => Ed Leafe (ed-leafe)

** Also affects: nova/pike
   Importance: Medium
     Assignee: Ed Leafe (ed-leafe)
       Status: In Progress

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https://bugs.launchpad.net/bugs/1707021

Title:
  Ironic Flavor Migration can miss instances

Status in OpenStack Compute (nova):
  In Progress
Status in OpenStack Compute (nova) pike series:
  In Progress

Bug description:
  The recently merged patch (https://review.openstack.org/484949) runs
  the migration in the driver's init_host() method. It has since been
  pointed out that if there are multiple computes handling ironic, some
  instances can get skipped if the hash ring is refreshed and an
  unmigrated instance is placed on a compute whose init_host has already
  run. While a rare thing, this should be corrected to ensure that all
  instances have their flavors migrated in Pike.

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References