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| #!/bin/bash |
| # $Id$ |
| # alcasar-load_balancing.sh Load-balance internet connection over two or more local links |
| # |
| # Version: 0.8.0 - Wed, Sep 01, 2010 |
| # |
| # by Author: BOUIJOUX Franck (3abTux) <3abtux@free.fr> |
| # en cours d'expérimentation et d 'écriture |
| # |
| |
| # Définion des poids des routes |
| WEIGHT1=1 |
| WEIGHT2=1 |
| WEIGHT3=3 |
| |
| # Set devices: |
| DEV1=${1-eth0} # defaut eth0 |
| DEV2=${2-eth0} # defaut eth0 mais peut être autre chose :-) |
| DEV3=${3-eth0} # defaut eth0 mais peut être autre chose :-) |
| |
| # Trouver les adresses pour chaque interface |
| IP1=`ifconfig $DEV1 | grep inet | awk '{ print $2 }' | awk -F: '{ print $2 }'` |
| IP2=`ifconfig $DEV2 | grep inet | awk '{ print $2 }' | awk -F: '{ print $2 }'` |
| #IP3=`ifconfig $DEV3 | grep inet | awk '{ print $2 }' | awk -F: '{ print $2 }'` |
| |
| # iTrouver les passerelles pour chaque interface |
| #GW1=`route -n | grep $DEV1 | grep '^0.0.0.0' | awk '{ print $2 }'` |
| #GW2=`route -n | grep $DEV2 | grep '^0.0.0.0' | awk '{ print $2 }'` |
| GW1=192.168.1.6 |
| GW2=192.168.1.1 |
| #GW3=192.168.1.6 |
| |
| echo "Acces internet depuis $DEV1: IP=$IP1 par la GW=$GW1" |
| echo " et depuis $DEV2: IP=$IP2 par la GW=$GW2" |
| #echo " et depuis $DEV3: IP=$IP3 par la GW=$GW3" |
| |
| # Definition des routes |
| |
| # Tester si les tables existent sinon les créer |
| if [ -z "`cat /etc/iproute2/rt_tables | grep '^252'`" ] ; then |
| echo "252 rt_dev1" >> /etc/iproute2/rt_tables |
| fi |
| |
| if [ -z "`cat /etc/iproute2/rt_tables | grep '^251'`" ] ; then |
| echo "251 rt_dev2" >> /etc/iproute2/rt_tables |
| fi |
| #if [ -z "`cat /etc/iproute2/rt_tables | grep '^250'`" ] ; then |
| # echo "250 rt_dev3" >> /etc/iproute2/rt_tables |
| #fi |
| |
| |
| # Tables de routage |
| ip route add default via $GW1 table rt_dev1 |
| ip route add default via $GW2 table rt_dev2 |
| #ip route add default via $GW3 table rt_dev3 |
| |
| # Créatin des règles |
| ip rule add from $IP1 table rt_dev1 |
| ip rule add from $IP2 table rt_dev2 |
| #ip rule add from $IP3 table rt_dev3 |
| |
| # Effacer la route par défaut existante |
| if [ ! -z "`ip route show table main | grep 'nexthop'`" ] ; then |
| ip route del default scope global |
| fi |
| |
| # Alterne les liens basés sur chauqe route |
| ip route add default scope global nexthop via $GW1 dev $DEV1 weight $WEIGHT1 \ |
| nexthop via $GW2 dev $DEV2 weight $WEIGHT2 |
| # nexthop via $GW3 dev $DEV3 weight $WEIGHT3 |
| |
| |
| # Purge le cache |
| ip route flush cache |
| |
| # Fin de alcasar-load_balancing.sh |
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