simple snapshot backup bash script

gistfile1.sh

#!/bin/bash


set -e 
set -u

DEBUG_NOOP=""

# simple snapshot script for raodwarrior systems to make a snapshot of (nearly) the whole 
# filesystem, plus some extras like package lists


BASEDIR=/media/road-backup

NO_SNAPSHOT_BASEDIR=$BASEDIR/mirror-only

SNAPSHOT_BASEDIR=/media/road-backup/snapshots

DATESTAMP=$(date +%Y-%m-%d)

SNAPSHOT_TARGET=${SNAPSHOT_BASEDIR}/$DATESTAMP

LATEST_LINK=$SNAPSHOT_BASEDIR/latest

SIMPLE_COPY_DIRS="
/data/produktion/run
/data/produktion/tmp
/data/media
"

# system stuff that might be enough to have only a single copy from:
#/usr
#/lib
#/sbin
#/bin
#/boot
#/root
#/run


# Excludes: start with / from the source. otherwise all directories anywhere with such a named are omitted

EXCLUDES="
/dev
/home/henning/.gvfs
/home/henning/data
/lost+found
/media
/misc
/mnt
/net
/proc
/selinux
/sys
/tmp
/welt
$SIMPLE_COPY_DIRS
"


EXCLUDE_FILE=$(mktemp --suffix snapshot-script-exclude)

# when using an exclude list from a single line separated by spaces, ensure it gets into a file line by line
echo $EXCLUDES | sed -e 's/ /\n/g' > $EXCLUDE_FILE

echo using exclude list $EXCLUDE_FILE


cd /root

[ ! -d backups ] && mkdir backups

echo make backup of myself
cp $BASEDIR/simple-snapshot.sh $BASEDIR/simple-snapshot.sh.bak

dpkg --get-selections > backups/dpkg-selections_${DATESTAMP}.info


# mysql snapshot if there is a server on the local machine!
if [ -d /var/lib/mysql ]; then
	mysqldump -u root -A > backups/mysqldump_${DATESTAMP}
fi

if ! [ -d $SNAPSHOT_TARGET ]; then
	mkdir -p $SNAPSHOT_TARGET
fi

$DEBUG_NOOP rsync -a --delete --link-dest $LATEST_LINK/ --exclude-from $EXCLUDE_FILE / $SNAPSHOT_TARGET/

if [ -f $LATEST_LINK ]; then 
	rm $LATEST_LINK
fi
ln -s $DATESTAMP  $LATEST_LINK


## stuff we don't want snapshots for, just a safety copy

if [ ! -d ${NO_SNAPSHOT_BASEDIR} ]; then
	echo "we don't have basdir ${NO_SNAPSHOT_BASEDIR} for non-snapshot backups. Work finished."
	exit 0
fi

for dir in $SIMPLE_COPY_DIRS; do
	echo make copy of $dir
	TARGET_DIR=${NO_SNAPSHOT_BASEDIR}/${dir}
	if [ ! -d $TARGET_DIR ]; then
		$DEBUG_NOOP mkdir -p ${TARGET_DIR}
	fi
	$DEBUG_NOOP rsync -a --delete --ignore-errors ${dir}/ ${TARGET_DIR}/
done


if [ -d /media/externmedia ]; then
	time rsync -a --delete  /media/externmedia/ $BASEDIR/externmedia/
fi