#!/usr/bin/env bash

PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/root/bin"

BACKUPTYPE="remote"
BACKUPSERVER=""
BACKUPDEVICE="/dev/sdb1" 
FSTYPE="xfs"
LOCALBACKUPDIR="/backup"
BACKUPADMIN="support@example.com"
servertype="linux"

function mount_drive() {
	mount -t $1 $2 $3
}

function do_local_backup() {
	HOSTS=`cat /etc/backup/backup.list`
	for host in $HOSTS; do
		lvcreate -L 2048M -s -n vsbackup /dev/my_volume_group/${host}
		if [ $? != 0 ]; then
			echo "Error creating snapshot volume, exiting."
			echo
			exit 1
		fi
		mount -t ext3 /dev/my_volume_group/vsbackup /mnt/lvmsnapshot
		rdiff-backup -v 4 --exclude /mnt/lvmsnapshot/proc/* /mnt/lvmsnapshot /backup/${host}
		umount /mnt/lvmsnapshot
		lvremove -f /dev/my_volume_group/vsbackup
	done
}
 
function do_remote_backup() {
	HOSTS=`cat /etc/backup/backup.list`
	for host in $HOSTS; do
		lvcreate -L 2048M -s -n vsbackup /dev/my_volume_group/${host}
		if [ $? != 0 ]; then
			echo "Error creating snapshot volume, exiting."
			echo
			exit 1
		fi
		mount -t ext3 /dev/my_volume_group/vsbackup /mnt/lvmsnapshot
		rdiff-backup -v 4 --exclude /mnt/lvmsnapshot/proc/* /mnt/lvmsnapshot ${BACKUPSERVER}::/backup/`hostname`/${host}
		umount /mnt/lvmsnapshot
		lvremove -f /dev/my_volume_group/vsbackup
	done
}
	
function do_win_backup() {
	cp -fv /xen/images/* /backup
	umount /backup
}
		
function do_remote_win_backup() {
	rdiff-backup -v 4 /xen/images ${BACKUPSERVER}::/backup/`hostname`
}

if [ ! -d /mnt/lvmsnapshot ]; then
	mkdir /mnt/lvmsnapshot
fi


if [ $BACKUPTYPE != "remote" ] && [ $servertype == "linux" ]
then
	echo "Running local backup..."
	mount_drive $FSTYPE $BACKUPDEVICE $LOCALBACKUPDIR
	do_local_backup
	umount /backup
	exit
fi

if [ $BACKUPTYPE != "remote" ] && [ $servertype == "windows" ]
then
	echo "Running local backup..."
	mount_drive $FSTYPE $BACKUPDEVICE $LOCALBACKUPDIR
	do_win_backup
	umount /backup
	exit
fi

if [ $BACKUPTYPE == "remote" ] && [ $servertype == "linux" ]
then
	echo "Running remote backup..."
	echo $FSTYPE $BACKUPDEVICE $LOCALBACKUPDIR
	do_remote_backup 
	exit
fi

if [ $BACKUPTYPE == "remote" ] && [ $servertype == "windows" ]
then
	echo "Running remote backup..."
	do_remote_win_backup
	exit
fi

echo
echo "Backups done!"
echo