yahoo-eng-team team mailing list archive

[melanie witt <1707238@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

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

** Affects: nova
     Importance: High
     Assignee: melanie witt (melwitt)
         Status: New


** Tags: libvirt volumes

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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):
  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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