Ceph » ceph-volume

If you use a custom cluster name and reboot your OSD node that hosts OSDs created by ceph-volume they will fail to start.

This will be present in /var/log/ceph-volume.log

[2017-12-05 16:08:03,003][ceph_volume][ERROR ] exception caught by decorator
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/ceph_volume/decorators.py", line 59, in newfunc
    return f(*a, **kw)
  File "/usr/lib/python2.7/site-packages/ceph_volume/main.py", line 142, in main
    conf.ceph = configuration.load(conf.path)
  File "/usr/lib/python2.7/site-packages/ceph_volume/configuration.py", line 36, in load
    raise exceptions.ConfigurationError(abspath=abspath)
ConfigurationError: Unable to load expected Ceph config at: /etc/ceph/ceph.conf

Also, this line will show in /var/log/ceph-volume-systemd.log

stderr -->  ConfigurationError: Unable to load expected Ceph config at: /etc/ceph/ceph.conf