backupscript

#!/bin/bash
# RedLink Customized backup script
# Version 1.0
# Author: Vincent Andries <vincent.andries@redlink.be>
#
# Takes backups of servers defined in SERVERS variable.
# Script MUST run from /root/backup_tools
# For every server create a rsync.excluse.$server file.
# This can contain the dirs to exclude while backupping (like /proc)
#
# Logs will be created in /root/backup_tools/backup.log
#
# Incremental backups every day in daily,
# 4 Sundays in weekly
# first Sunday in monthly.
#
# Install in crontab:
# 59 23 * * * /root/backup_tools/backup.sh


SERVERS="SERVER1 SERVER2"

function moveMonths {
        SERVER=$1
        LASTMONTH=`ls /mnt/backup/$SERVER/monthly/ | sort -nr | head -n 1`
        for i in `seq 0 $LASTMONTH | sort -nr` ; do
                echo "mv /mnt/backup/$SERVER/monthly/$i /mnt/backup/$SERVER/monthly/$(($i+1))" >> /root/backup_tools/backup.log
                mv /mnt/backup/$SERVER/monthly/$i /mnt/backup/$SERVER/monthly/$(($i+1))
        done
        echo "------------- Months moved -----------" >>/root/backup_tools/backup.log
        #all months are moved
}

function moveWeeks {
        # end of month ? If yes we need to move the months first
        WEEKNR=`date +%V`
        SERVER=$1
        if [ `echo "$WEEKNR%4" | bc` -eq "0" ] ; then
#       if [ "test" == "test" ] ; then
                # we have started a new month
                LASTWEEK=`ls /mnt/backup/$SERVER/weekly | sort -nr | head -n 1`
                moveMonths $SERVER
                # moving the last weekly backup to the first monthly backup
                echo "mv /mnt/backup/$SERVER/weekly/$LASTWEEK /mnt/backup/$SERVER/monthly/0" >> /root/backup_tools/backup.log
                mv /mnt/backup/$SERVER/weekly/$LASTWEEK /mnt/backup/$SERVER/monthly/0
                STARTSEQ="0"
        else
                # if not new month, we need to delete the last weekly backup.
                LASTWEEK=`ls /mnt/backup/$SERVER/weekly | sort -nr | head -n 1`
                echo "rm /mnt/backup/$SERVER/weekly/$LASTWEEK -rf" >> /root/backup_tools/backup.log
                rm /mnt/backup/$SERVER/weekly/$LASTWEEK -rf
                STARTSEQ="0"
        fi
        LASTWEEK=`ls /mnt/backup/$SERVER/weekly | sort -nr | head -n 1`
        for i in `seq $STARTSEQ $LASTWEEK | sort -nr` ; do
                echo "mv /mnt/backup/$SERVER/weekly/$i /mnt/backup/$SERVER/weekly/$(($i+1))" >> /root/backup_tools/backup.log
                mv /mnt/backup/$SERVER/weekly/$i /mnt/backup/$SERVER/weekly/$(($i+1))
        done
        # All weeks are moved
        echo "----------Weeks Moved-----------" >>/root/backup_tools/backup.log
}
for SERVER in $SERVERS ; do
        #beginning of backup. Checking if we are sunday
        if [ `date +%A` == "Sunday" ] ; then
#       if [ "Sunday" == "Sunday" ] ; then
                moveWeeks $SERVER
                LASTDAY=`ls /mnt/backup/$SERVER/daily | sort -nr | head -n 1`
                mv /mnt/backup/$SERVER/daily/$LASTDAY /mnt/backup/$SERVER/weekly/0
                echo "mv /mnt/backup/$SERVER/daily/$LASTDAY /mnt/backup/$SERVER/weekly/0" >> /root/backup_tools/backup.log
        else
                # removing last backup if we are not on sunday
                # else our last backup is already moved
                LASTDAY=`ls /mnt/backup/$SERVER/daily | sort -nr | head -n 1`
                echo "rm /mnt/backup/$SERVER/daily/$LASTDAY -rf" >> /root/backup_tools/backup.log
                rm /mnt/backup/$SERVER/daily/$LASTDAY -rf

        fi
        # recursiveley moving the days down
        LASTDAY=`ls /mnt/backup/$SERVER/daily | sort -nr | head -n 1`
        # always moving starting from 0. This will be filled using rsync
        for i in `seq 1 $LASTDAY | sort -nr`; do
                echo "mv /mnt/backup/$SERVER/daily/$i /mnt/backup/$SERVER/daily/$(($i+1))" >> /root/backup_tools/backup.log
          mv /mnt/backup/$SERVER/daily/$i /mnt/backup/$SERVER/daily/$(($i+1)) >> /root/backup_tools/backup.log
        done
        if [ ! -d "/mnt/backup/$SERVER/daily/1" ] ; then
                echo "mkdir /mnt/backup/$SERVER/daily/1" >>/root/backup_tools/backup.log
                mkdir /mnt/backup/$SERVER/daily/1
        fi
        echo "(cd /mnt/backup/$SERVER/daily/0/ && find . -print | cpio -dplm /mnt/backup/$SERVER/daily/1)" >> /root/backup_tools/backup.log
        (cd /mnt/backup/$SERVER/daily/0/ && find . -print | cpio -dplm /mnt/backup/$SERVER/daily/1 >>/root/backup_tools/cpio.log)
        echo "rsync -avz --delete --exclude-from '/root/backup_tools/rsync.exclude.$SERVER' --numeric-ids --progress -e ssh $SERVER:/ /mnt/backup/$SERVER/daily/0" >> /root/backup_tools/backup.log
        #rsync -avz --delete --exclude-from "/root/backup_tools/rsync.exclude.$SERVER" --numeric-ids --progress -e ssh $SERVER:/ /mnt/backup/$SERVER/daily/0
        rsync -az --log-file /root/backup_tools/rsync.log --delete --exclude-from "/root/backup_tools/rsync.exclude.$SERVER" --numeric-ids --progress -e ssh $SERVER:/ /mnt/backup/$SERVER/daily/0
        echo "[`date +%Y-%m-%d`]-----------[ $SERVER DONE ]---------" >>/root/backup_tools/backup.log
done
exit 0