Pause Whole Cluster For Maintenance

Problem

Admin wants to shutdown whole Cluster ( all Nodes ) for maintenance.

Solution

ceph osd set noout
ceph osd set norecover
ceph osd set norebalance
ceph osd set nobackfill
ceph osd set nodown
ceph osd set noscrub
ceph osd set nodeep-scrub
ceph osd set pause

Discussion

To restart cluster run commands in reverse order