#!/bin/sh
# Author: Brice Burgess - bhb@iceburg.net
# rbackup.sh -- secure backup to a remote machine using rsync.
# Directories to backup. Separate with a space. Exclude trailing slash!
SOURCES="/home/ /etc /var /root"
# IP or FQDN of Remote Machine
RMACHINE=<ip>
# Remote username
RUSER=root
# Location of passphraseless ssh keyfile
RKEY=/root/.ssh/rsync-key
# Directory to backup to on the remote machine. This is where your backup(s) will be stored
# Exclude trailing slash!
RTARGET="/backups/hostname"
# Set the number of backups to keep (greater than 1). Ensure you have adaquate space.
ROTATIONS=3
# Your EXCLUDE_FILE tells rsync what NOT to backup. Leave it unchanged, missing or
# empty if you want to backup all files in your SOURCES. If performing a
# FULL SYSTEM BACKUP, ie. Your SOURCES is set to "/", you will need to make
# use of EXCLUDE_FILE. The file should contain directories and filenames, one per line.
# An example of a EXCLUDE_FILE would be:
# /proc/
# /tmp/
# /mnt/
# *.SOME_KIND_OF_FILE
EXCLUDE_FILE="/path/to/your/exclude_file.txt"
# Comment out the following line to disable verbose output
VERBOSE="-v"
#######################################
########DO_NOT_EDIT_BELOW_THIS_POINT#########
#######################################
if [ ! -f $RKEY ]; then
echo "Couldn't find ssh keyfile!"
echo "Exiting..."
exit 2
fi
if ! ssh -i $RKEY $RUSER@$RMACHINE "test -x $RTARGET"; then
echo "Target directory on remote machine doesn't exist or bad permissions."
echo "Exiting..."
exit 2
fi
# Set name (date) of backup.
BACKUP_DATE="`date +%F_%H-%M`"
if [ ! $ROTATIONS -gt 1 ]; then
echo "You must set ROTATIONS to a number greater than 1!"
echo "Exiting..."
exit 2
fi
#### BEGIN ROTATION SECTION ####
BACKUP_NUMBER=1
# incrementor used to determine current number of backups
# list all backups in reverse (newest first) order, set name of oldest backup to $backup
# if the retention number has been reached.
for backup in `ssh -i $RKEY $RUSER@$RMACHINE "ls -dXr $RTARGET/*/"`; do
if [ $BACKUP_NUMBER -eq 1 ]; then
NEWEST_BACKUP="$backup"
fi
if [ $BACKUP_NUMBER -eq $ROTATIONS ]; then
OLDEST_BACKUP="$backup"
break
fi
let "BACKUP_NUMBER=$BACKUP_NUMBER+1"
done
# Check if $OLDEST_BACKUP has been found. If so, rotate. If not, create new directory for new backup.
if [ $OLDEST_BACKUP ]; then
# Set oldest backup to current one
ssh -i $RKEY $RUSER@$RMACHINE "mv $OLDEST_BACKUP $RTARGET/$BACKUP_DATE"
else
ssh -i $RKEY $RUSER@$RMACHINE "mkdir $RTARGET/$BACKUP_DATE"
fi
# Update current backup using hard links from the most recent backup
if [ $NEWEST_BACKUP ]; then
ssh -i $RKEY $RUSER@$RMACHINE "cp -al $NEWEST_BACKUP. $RTARGET/$BACKUP_DATE"
fi
#### END ROTATION SECTION ####
# Check to see if rotation section created backup destination directory
if ! ssh -i $RKEY $RUSER@$RMACHINE "test -d $RTARGET/$BACKUP_DATE"; then
echo "Backup destination not available."
echo "Make sure you have write permission in RTARGET on Remote Machin e."
echo "Exiting..."
exit 2
fi
echo "Verifying Sources..."
for source in $SOURCES; do
echo "Checking $source..."
if [ ! -x $source ]; then
echo "Error with $source!"
echo "Directory either does not exist, or you do not have proper permissions."
exit 2
fi
done
if [ -f $EXCLUDE_FILE ]; then
EXCLUDE="--exclude-from=$EXCLUDE_FILE"
fi
echo "Sources verified. Running rsync..."
for source in $SOURCES; do
# Create directories in $RTARGET to mimick source directory hiearchy
if ! ssh -i $RKEY $RUSER@$RMACHINE "test -d $RTARGET/$BACKUP_DATE/$source"; then
ssh -i $RKEY $RUSER@$RMACHINE "mkdir -p $RTARGET/$BACKUP_DATE/$source"
fi
rsync $VERBOSE $EXCLUDE -a --owner --group --perms --delete -e "ssh -i $RKEY" $source/ $RUSER@$RMACHINE:$RTARGET/$BACKUP_DATE/$source/
done
exit 0
.