Stop, umount and wipe all Ceph OSDs on a system

ceph-umount-and-wipe.sh

#!/bin/bash
set -e

systemctl stop ceph-osd.target

for ID in $(df -P|grep "/var/lib/ceph/osd"|awk '{print $6}'|cut -d '-' -f 2); do
    DEVICE=$(df -P /var/lib/ceph/osd/ceph-$ID|awk '{print $1}'|tail -1|sed 's/.$//'|cut -d '/' -f 3)

    ROTATIONAL=$(cat /sys/block/$DEVICE/queue/rotational)

    echo "Stopping osd.$ID"
    systemctl stop ceph-osd@$ID
    umount /var/lib/ceph/osd/ceph-$ID

    if [ "$ROTATIONAL" -eq 0 ]; then
        echo "Issuing a blkdiscard for $DEVICE"
        blkdiscard /dev/$DEVICE
    else
        echo "Zapping device $DEVICE"
        ceph-disk zap /dev/$DEVICE
    fi

    blockdev --rereadpt /dev/$DEVICE
done