Check manual page of ceph_status
Ceph Storage: Health status
This check monitors the health status and epoch
of Ceph storage systems.
The check is OK if the storage state is 'HEALTH OK', it is
WARN if the storage state is 'HEALTH WARN' and CRIT in case
if 'HEALTH CRIT', otherwise UNKNOWN.
Epoch levels are configurable. Default levels are 1 and 3
for a timerange of 30 minutes.
One service is created.