• RH support link (you'll need rhnetwork user/pass)

There can be various reasons to remove an OSD from an RHCS cluster, and the following steps show how to do it:

sudo /etc/init.d/ceph stop osd.{X} # where {X} is the OSD number

or:

sudo systemctl stop ceph-osd@{X} # where {X} is the OSD number

ceph osd out {X} # where {X} is the OSD number

ceph -w

ceph osd crush remove osd.{X}

If OSD is being redeployed and because of that need removal then skip step 4 it will keep OSD in the CRUSH map as DNE and will not cause data rebalance because of CRUSH map update. Only addition of OSD will cause data movement.

ceph auth del osd.{X}

ceph auth list

ceph osd rm {X}

umount /var/lib/ceph/osd/ceph-{x}