Ceph » CephFS

If ceph fs volume create command is run with --data-pool and --meta-pool
options and if one of the pool names passed to these options is a non-existing
pool, then the command fails with ENOENT (which is fine) and also deletes the
other pool which is present (this behaviour is a bug).

Example -

$ ceph osd pool create cephfs.b.data
pool 'cephfs.b.data' created
$ ceph osd pool create cephfs.b.meta
pool 'cephfs.b.meta' created
$ ceph osd pool ls
cephfs.b.data
cephfs.b.meta

# note that metadata pool name below has a typo
$ ceph fs volume create b --data-pool cephfs.b.data --meta-pool cephfs.b.metaa
Error ENOENT: pool 'cephfs.b.metaa' does not exist

# note that "cephfs.b.data" isn't listed by below command which implies that it was deleted
$ ceph osd pool ls
cephfs.b.meta

IOW, pools should be deleted by this command only if it was also created by this command.