Ceph journal migration

ceph_journal_migration.sh

#!/bin/bash

journal_device="/dev/sda"
osds=(0 1 2 3 4)
num_journal_part=${#osds[@]}
i=1
while [ $i -le $num_journal_part ]
do
    disk_id=`uuidgen`
    sgdisk --new=${i}:0:+5120M --change-name="${i}:ceph journal" --partition-guid=${i}:${disk_id} --typecode=${i}:45b0969e-9b03-4f30-b4c6-b4b80ceff106 --mbrtogpt ${journal_device}
    partx -a $journal_device
    # old service ceph stop osd.${osds[$i-1]}
    systemctl stop ceph-osd@${osds[$i-1]}
    ceph-osd -i ${osds[$i-1]} --flush-journal
    ln -sf /dev/disk/by-partuuid/${disk_id} /var/lib/ceph/osd/ceph-${osds[$i-1]}/journal
    chown -h ceph:ceph /var/lib/ceph/osd/ceph-${osds[$i-1]}/journal
    echo $disk_id > /var/lib/ceph/osd/ceph-${osds[$i-1]}/journal_uuid
    ceph-osd -i ${osds[$i-1]} --mkjournal
    # old service ceph start osd.${osds[$i-1]}
    systemctl start ceph-osd@${osds[$i-1]}
    i=$[$i+1] 
done