Mark each OSD down in a Ceph cluster, waiting for previous OSD to come up before downing the next.

loop_down.sh

#!/bin/bash


totalosds=$(ceph osd tree | grep -c osd\\.[0-9][0-9]*.*up)
osdcounter=1
for i in $(ceph osd tree | awk '/up/ {split($3,a,".");print a[2]}');do
    echo -n "Currently at: $osdcounter / $totalosds == "
    echo "scale=2; $osdcounter/$totalosds*100" | bc
    isup=$(ceph osd dump | grep -c osd\\.$i\ up)
    if [ $isup -eq 1 ]; then
        ceph osd down osd.$i
        while [ $(ceph osd dump | grep -c osd\\.$i\ up) -eq 0 ];do
            echo -n .
            sleep 1
        done
        echo
    fi
done