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[Arthur Dayne <1841363@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Wheh nova.conf is set as

...

[libvirt]
...
disk_cachemodes = block=writethrough
...

OR

[libvirt]
...
disk_cachemodes = block=writeback
...

Nova cannot attache volume whose source_type is 'block', because of a
libvirt issue: https://bugzilla.redhat.com/show_bug.cgi?id=1086704

** Affects: nova
     Importance: Undecided
     Assignee: Arthur Dayne (palagend)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => Arthur Dayne (palagend)

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https://bugs.launchpad.net/bugs/1841363

Title:
  nova cannot attach volume whose source_type='block' when setting
  disk_cache_modes as writethrough or writeback

Status in OpenStack Compute (nova):
  New

Bug description:
  Wheh nova.conf is set as

  ...

  [libvirt]
  ...
  disk_cachemodes = block=writethrough
  ...

  OR

  [libvirt]
  ...
  disk_cachemodes = block=writeback
  ...

  Nova cannot attache volume whose source_type is 'block', because of a
  libvirt issue: https://bugzilla.redhat.com/show_bug.cgi?id=1086704

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