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[melanie witt <1967157@xxxxxxxxxxxxxxxxxx>]

Note: this fix will not be complete in nova until
https://review.opendev.org/c/openstack/os-brick/+/836059 merges and a
new version of os-brick is released and nova requirements.txt is updated
to consume it.

** Also affects: os-brick
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1967157

Title:
  Fails to extend in-use (non LUKS v1) encrypted volumes

Status in OpenStack Compute (nova):
  Fix Released
Status in os-brick:
  In Progress

Bug description:
  Patch fixing bug #1861071 resolved the issue of extending LUKS v1
  volumes when nova connects them via libvirt instead of through os-
  brick, but nova side still fails to extend in-use volumes when they
  don't go through libvirt (i.e., LUKS v2).

  The logs will show a very similar error, but the user won't know that
  his has happened and Cinder will show the new size:

  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [req-100471fa-c198-40ac-b713-adc395e480f1 req-3a1ea13e-916b-4851-be67-6d849bf4aa3a service nova] [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9] resizing block device failed.: libvirt.libvirtError: internal error: unable to execut>
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9] Traceback (most recent call last):
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 2809, in extend_volume
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]     connection_info, encryption)
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 2763, in _resize_attached_encrypted_volume
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]     decrypted_device_new_size, block_device, instance)
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 2712, in _resize_attached_volume
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]     block_device.resize(new_size)
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]   File "/opt/stack/nova/nova/virt/libvirt/guest.py", line 789, in resize
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]     self._guest._domain.blockResize(self._disk, size, flags=flags)
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]   File "/usr/local/lib/python3.6/site-packages/eventlet/tpool.py", line 193, in doit
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]     result = proxy_call(self._autowrap, f, *args, **kwargs)
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]   File "/usr/local/lib/python3.6/site-packages/eventlet/tpool.py", line 151, in proxy_call
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]     rv = execute(f, *args, **kwargs)
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]   File "/usr/local/lib/python3.6/site-packages/eventlet/tpool.py", line 132, in execute
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]     six.reraise(c, e, tb)
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]   File "/usr/local/lib/python3.6/site-packages/six.py", line 719, in reraise
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]     raise value
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]   File "/usr/local/lib/python3.6/site-packages/eventlet/tpool.py", line 86, in tworker
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]     rv = meth(*args, **kwargs)
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]   File "/usr/lib64/python3.6/site-packages/libvirt.py", line 1207, in blockResize
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9]     raise libvirtError('virDomainBlockResize() failed')
  Mar 29 21:25:39 ssmc.localdomain nova-compute[1376242]: ERROR nova.virt.libvirt.driver [instance: 3f206ec4-fad5-48b8-9cb2-c3e6f00f30c9] libvirt.libvirtError: internal error: unable to execute QEMU command 'block_resize': Cannot grow device files

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