Mount BTRFS volumes and make a read-only system volume BTRFS snapshot on backup volume

sysVolumeCheckIn.sh

#!/bin/sh

set -e

# Snapshot @targetSubvolume to @storageSubvolume/path/to/checkpoints/folder

UUID='76186cef-780f-4a80-9c0f-19fcc3a53ee6'
targetSubvolumeName='@arch-root'
storageSubvolumeName='@workspace'
mountPath="/mnt/$UUID"
systemVolumePath="$mountPath/$targetSubvolumeName"
snapshotPath="$mountPath/$storageSubvolumeName/systemCenter/btrfs/checkpoints/"

mkdir -p $mountPath
mount --uuid $UUID $mountPath
mkdir -p $snapshotPath
btrfs subvol snapshot -r $systemVolumePath $snapshotPath/@arch-checkpoint-"$(date '+%Y%m%d-%s')"-RO

umount -R $mountPath
rm -R $mountPath