Fixes the journal symlink and the partition type UUID for a give OSD path.

fix-osd-journal.sh

#!/bin/bash

if [ -z "$1" ]; then
    echo Please provide OSD path
    echo
    echo Usage Example:
    echo   ./$0 /var/lib/ceph/osd/ceph-123
    echo
    exit 1
fi

osdpath=$1

if [ ! -L ${osdpath}/journal ]; then
    echo No journal link exists in $1
    echo
    echo Usage Example:
    echo   ./$0 /var/lib/ceph/osd/ceph-123
    echo
    exit 1
fi

myosdid=$(echo $osdpath | awk -F\- '{print $NF}')

journallink=$(ls -l ${osdpath}/journal | awk '{print $NF}')
journalpath=$(readlink -f ${osdpath}/journal)

if [ $(echo $journallink | grep -c by-partuuid) -eq 0 ]; then
    journaluuid=$(blkid $journalpath -o value -s PARTUUID)
    echo Createing proper symlink to UUID $journaluuid
    rm -f ${osdpath}/journal
    ln -s /dev/disk/by-partuuid/${journaluuid} ${osdpath}/journal
    echo ${journaluuid} > ${osdpath}/journal_uuid
else
    echo Journal already linked to partuuid.
fi

sgdisk --typecode=${journalpath: -1}:45b0969e-9b03-4f30-b4c6-b4b80ceff106 -- ${journalpath%?}

Run with the full OSD path to fix the journal. To run on all OSD paths, you could run as:
for i in /var/lib/ceph/osd/*; do ./fix-osd-journal.sh $i; done