Storage pool is unavailable on this server: Placeholder volume does not exist

LXD
,
8

I’ve now got access to a ceph cluster to show you what I meant.

So, first lets setup a ceph storage pool so we can break it to get the error you’re experiencing.

  1. Create storage pool:
lxc storage create ceph ceph
  1. Check for the placeholder volume:
rbd list --pool ceph
lxd_ceph
  1. Delete the placeholder volume from ceph:
rbd remove lxd_ceph --pool ceph
Removing image: 100% complete...done.
  1. Restart LXD and check the error logs and pool status:
DEBUG  [2023-01-03T10:45:05Z] Initializing storage pool                     pool=ceph
DEBUG  [2023-01-03T10:45:05Z] Mount started                                 driver=ceph pool=ceph
DEBUG  [2023-01-03T10:45:05Z] Mount finished                                driver=ceph pool=ceph
ERROR  [2023-01-03T10:45:05Z] Failed mounting storage pool                  err="Placeholder volume does not exist" pool=ceph

lxc storage ls
+---------+--------+------------------------------------+-------------+---------+-------------+
|  NAME   | DRIVER |               SOURCE               | DESCRIPTION | USED BY |    STATE    |
+---------+--------+------------------------------------+-------------+---------+-------------+
| ceph    | ceph   | ceph                               |             | 0       | UNAVAILABLE |
+---------+--------+------------------------------------+-------------+---------+-------------+
  1. Restore placeholder volume and wait for LXD to detect it:
rbd create lxd_ceph --pool ceph --size 0B

DEBUG  [2023-01-03T10:47:05Z] Initializing storage pool                     pool=ceph
DEBUG  [2023-01-03T10:47:05Z] Mount started                                 driver=ceph pool=ceph
DEBUG  [2023-01-03T10:47:05Z] Mount finished                                driver=ceph pool=ceph
INFO   [2023-01-03T10:47:05Z] Initialized storage pool                      pool=ceph
INFO   [2023-01-03T10:47:05Z] All storage pools initialized
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