#!/bin/bash
#this script makes a copy of each container and backups afterwards the copies
set -x

backuppath='/srv/backUP/lxc/'
backupuser='rick-monitoring'
lxccmd='/snap/bin/lxc'

#some validations
if [ ! -d ${backuppath} ]
then
	echo "Please set a backup directory which is accessible by this script"
	exit 2
fi

id $backupuser > /dev/null 2>&1
if [ $? -ne 0 ]
then 
	echo "Please set a valid user within this script"
	exit 2
fi

#only backup container which contain a 1 at the end of the line
for container in $(${lxccmd} list --format csv -c n | grep  "1$");
do 
	${lxccmd} stop ${container}
	${lxccmd} export ${container} ${backuppath}$(date +%Y_%m_%d)-lxc-${container}.tar.gz --instance-only --optimized-storage
	${lxccmd} start ${container}
done

#housekeeping - keep last 14 days
find ${backuppath} -mtime +14 -exec rm -f {} \;

#own data for backupuser
chown -R ${backupuser}:${backupuser} ${backuppath}