Check manual page of ceph_status.osds
Ceph Storage: OSDs
This check monitors the number of and epoch of OSDs
of Ceph storage systems.
Levels for the numbers of OSDs in state 'out' or 'down'
are configurable. Default levels are set to 7, 5 each.
Epoch levels are configurable. Default levels are 50 and 100
for a timerange of 15 minutes.
Moveover if any OSD is 'near full' the check goes WARN and
'full' the check reports CRIT.
One service is created.