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[sean mooney <2074219@xxxxxxxxxxxxxxxxxx>]

** Also affects: nova/2025.1
   Importance: Undecided
       Status: New

** Also affects: nova/2024.1
   Importance: Undecided
       Status: New

** Also affects: nova/2024.2
   Importance: Undecided
       Status: New

** Changed in: nova/2025.1
       Status: New => Fix Released

** Changed in: nova/2024.2
       Status: New => In Progress

** Changed in: nova/2025.1
   Importance: Undecided => Medium

** Changed in: nova/2024.1
   Importance: Undecided => Medium

** Changed in: nova
   Importance: Undecided => Medium

** Changed in: nova/2024.2
   Importance: Undecided => Medium

** Changed in: nova
     Assignee: (unassigned) => sean mooney (sean-k-mooney)

** Changed in: nova/2025.1
     Assignee: (unassigned) => sean mooney (sean-k-mooney)

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https://bugs.launchpad.net/bugs/2074219

Title:
  Failed to detach volume AttributeError:
  'LibvirtConfigGuestHostdevMDEV' object has no attribute 'alias'

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) 2024.1 series:
  New
Status in OpenStack Compute (nova) 2024.2 series:
  In Progress
Status in OpenStack Compute (nova) 2025.1 series:
  Fix Released

Bug description:
  Similar to https://bugs.launchpad.net/nova/+bug/1942345 lack of alias
  handling for LibvirtConfigGuestHostdevMDEV causes volume detach to
  fail following an upgrade to Caracal.

  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [None req-fe679559-73ae-41f5-9bf7-346e998345b4 1405cdbc6158472e9e358a772965d4d8 55d7efb46dd945a2b86f7ce8aa657e1a - - 863ca4dddb2f43
  d8a8919758eccbc23a 863ca4dddb2f43d8a8919758eccbc23a] [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] Failed to detach volume 2e394be5-b166-43d0-abe9-2b6f3eb07dbd from /dev/sdb: AttributeError
  : 'LibvirtConfigGuestHostdevMDEV' object has no attribute 'alias'
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] Traceback (most recent call last):
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]   File "/usr/lib/python3/dist-packages/nova/virt/block_device.py", line 413, in dr
  iver_detach
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]     virt_driver.detach_volume(context, connection_info, instance, mp,
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]   File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 2831, in
   detach_volume
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]     self._detach_with_retry(
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]   File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 2540, in
   _detach_with_retry
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]     self._detach_from_live_with_retry(
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]   File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 2600, in
   _detach_from_live_with_retry
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]     live_dev = get_device_conf_func()
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]   File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 2799, in
   _get_guest_disk_device
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]     dev = guest.get_device_by_alias(
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]   File "/usr/lib/python3/dist-packages/nova/virt/libvirt/guest.py", line 420, in g
  et_device_by_alias
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]     if dev.alias == devalias:
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] AttributeError: 'LibvirtConfigGuestHostdevMDEV' object has no attribute 'alias'
  2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]

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