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[Matt Riedemann <mriedem@xxxxxxxxxx>]

** Also affects: nova/newton
   Importance: Undecided
       Status: New

** Changed in: nova/newton
       Status: New => In Progress

** Changed in: nova/newton
   Importance: Undecided => High

** Changed in: nova/newton
     Assignee: (unassigned) => Matt Riedemann (mriedem)

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https://bugs.launchpad.net/bugs/1625660

Title:
  Volume detach is broken when using volume-update first

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) newton series:
  In Progress

Bug description:
  https://bugs.launchpad.net/nova/+bug/1490236 was focusing on
  correcting the volume-update API so that it was idempotent.
  Unfortunately, the merged solution is introducing a huge regression by
  incorrectly providing the old volume ID as the new attachment
  information.

  https://github.com/openstack/nova/commit/be553fb15591c6fc212ef3a07c1dd1cbc43d6866

  
  Consequently, it's now impossible for an end-user to detach a volume if some operator updated the BDM to point to a different volume.

  Evidence here: http://paste.openstack.org/show/582248/

  What's unfortunate is that the original bug is about to be worked
  around by just detaching/attaching the volume to the instance before
  swapping back...

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