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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

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

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

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https://bugs.launchpad.net/bugs/1707238

Title:
  detach_device_with_retry doesn't detach from live domain if persistent
  domain was already detached in the past

Status in OpenStack Compute (nova):
  In Progress
Status in OpenStack Compute (nova) newton series:
  New
Status in OpenStack Compute (nova) ocata series:
  New

Bug description:
  In an attempt to fix a different bug [1] where a later try to detach a
  volume failed if the guest was busy and ignored the request to detach
  from the live domain, a new bug was introduced where a later try to
  detach a volume silently passes even though the device is still
  attached to the live domain.

  This bug is serious because now it's possible for a volume to be
  attached to two live domains and data corruption can occur. We should
  be trying to detach from the live domain even if we had already
  detached from the persistent domain in the past.

  [1] https://bugs.launchpad.net/nova/+bug/1633236

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