list-disks action gives an error when disk known by udev is omitted from value of osd-devices option

[Peter Matulis]

Using rev.294 of the ceph-osd charm, when two disks are visible by a unit's underlying machine and one of those disks is omitted from the list of devices given by the `osd-devices` option an error appears when the `list-disks` action is run.

$ juju run-action --wait ceph-osd/0 list-disks

unit-ceph-osd-0:
  UnitId: ceph-osd/0
  id: "3"
  results:
    Stderr: |2
        Failed to find physical volume "/dev/vdc".
    blacklist: '[]'
    disks: '[''/dev/vdb'', ''/dev/vdc'']'
    non-pristine: '[]'
  status: completed
  timing:
    completed: 2020-01-24 15:26:20 +0000 UTC
    enqueued: 2020-01-24 15:26:18 +0000 UTC
    started: 2020-01-24 15:26:19 +0000 UTC

$ juju config ceph-osd osd-devices

/dev/vdb

[Andrew McLeod (admcleod)]

The error is captured in the action output, but does it cause a problem with the action or functionality of the cluster? This will determine the importance of the bug.

[Peter Matulis (petermatulis)]

No, it does not cause any problems to my knowledge.