root@bowie:~# pveceph createmgr
creating manager directory '/var/lib/ceph/mgr/ceph-bowie'
creating keys for 'mgr.bowie'
unable to open file '/var/lib/ceph/mgr/ceph-bowie/keyring.tmp.24284' - No such file or directory
that means that creating a temporary file in /var/lib/ceph/mgr/ceph-bowie failed. did the directory creation actually succeed? (i.e., does /var/lib/ceph/mgr/ceph-bowie exist?)