#!/bin/bash
### BEGIN INIT INFO
# Provides:       expand-root
# Required-Start: 
# Required-Stop:  
# Should-Start:   
# Should-Stop:    
# Default-Start:  2 3 4 5
# Default-Stop:   
# Description:    Expand the filesystem of the mounted root volume/partition to its maximum possible size
### END INIT INFO

prog=$(basename $0)
logger="logger -t $prog"

device_path="/dev/xvda"

filesystem=`blkid | grep $device_path | sed 's#\(.*\):.*TYPE="\(.*\)".*#\2#'`

case $filesystem in
	xfs)  xfs_growfs / ;;
	ext2) resize2fs $device_path ;;
	ext3) resize2fs $device_path ;;
	ext4) resize2fs $device_path ;;
	*)    $logger "The filesystem $filesystem was not recognized. Unable to expand size." ;;
esac