Public bug reported:

When using bluestore or filestore with a separate journal device, we
often see that the ceph-osd daemon crashes on activation with a
'permission denied' error on the link to the block device supporting the
particular component of the OSD (bluestore block/wal/db or journal
device for filestore).

chown -R ceph:ceph /dev/dm-X fixes the issue and the osd can then be
started; I've also not seen this issue occur during a normal reboot (as
the permissions are re-asserted by ceph-volume as OSD's are started up).

Hunch is something udev-y is racing with ceph-volume on the initial
activiate call but not tracked it down yet.

** Affects: ceph (Ubuntu)
     Importance: Undecided
         Status: New

** Summary changed:

- ceph-volume block device permissions not set on initial activate call
+ ceph-volume: block device permissions sometimes not set on initial activate 
call

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https://bugs.launchpad.net/bugs/1767087

Title:
  ceph-volume: block device permissions sometimes not set on initial
  activate call

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