gistfile1.sh

#!/bin/bash

set -e

BACKUPROOT=/mnt/gentoo
export PATH=${BACKUPROOT}/btrfs-progs:$PATH

# init fs layout
if [ -z "${NOINIT}" ]; then
	mkfs.btrfs -O skinny-metadata -d raid1 -m raid1 /dev/sda3 /dev/sdb2 /dev/sdc1 /dev/sde1
	mkdir -p ${BACKUPROOT}/rootfs/mnt/btrfs
	mount -o noatime,compress=lzo,autodefrag,space_cache,inode_cache /dev/sda3 ${BACKUPROOT}/rootfs/mnt/btrfs
	cd ${BACKUPROOT}/rootfs/mnt/btrfs
	btrfs su c home
	mkdir usr
	btrfs su c usr/portage
	mkdir var
	btrfs su c var/tmp
	mkdir btrfs
else
	mount -o noatime,compress=lzo,autodefrag,space_cache,inode_cache /dev/sda3 ${BACKUPROOT}/rootfs/mnt/btrfs
fi

# mount fs
# mount -o noatime,compress=lzo,autodefrag,space_cache,inode_cache /dev/sda3 ${BACKUPROOT}/rootfs/mnt/btrfs
# mount -o noatime,compress=lzo,autodefrag,space_cache,inode_cache /dev/sda3 ${BACKUPROOT}/rootfs/mnt/btrfs/btrfs
cd ${BACKUPROOT}/rootfs
mount --rbind /dev dev
mount -t proc proc proc
mount -t sysfs sysfs sys
mount --rbind /mnt/gentoo var/backup

cat <<EOM > restore.sh
#!/bin/bash
bacula-dir
bacula-fd
bacula-sd
bash
killall bacula-dir
killall bacula-fd
killall bacula-sd
EOM
chroot . /bin/bash restore.sh
umount ${BACKUPROOT}/rootfs/mnt/btrfs
umount -l dev
umount proc
umount sys
umount -l var/backup