DR script for LVS

Director script:

#! / bin/bash## LVS script for VS/DR#. / etc/rc.d/init.d/functions#VIP=192.168.0.210RIP1=192.168.0.221RIP2=192.168.0.222PORT=80#case "$1" instart) / sbin/ifconfig eth0:1$ VIP broadcast $VIP netmask 255.255.255.255 up / sbin/route add-host $VIP dev eth0:1# Since this is the Director we must be able to forward packets echo 1 > / proc/sys/net/ipv4/ip_forward# Clear all iptables rules. / sbin/iptables-F # Reset iptables counters. / sbin/iptables-Z# Clear all ipvsadm rules/services. / sbin/ipvsadm-C # Add an IP virtual service for VIP 192.168.0.219 port 8 In this recipe, we will use the round-robin scheduling method. # In production, however, you should use a weighted, dynamic scheduling method. / sbin/ipvsadm-A-t $VIP:80-s wlc# Now direct packets for this VIP to# the real server IP (RIP) inside the cluster / sbin/ipvsadm-a-t $VIP:80-r $RIP1-g-w 1 / sbin/ipvsadm-a-t $VIP:80-r $RIP2-g-w 2 / bin/touch / var/lock/subsys/ipvsadm & > / dev/null Stop) # Stop forwarding packets echo 0 > / proc/sys/net/ipv4/ip_forward# Reset ipvsadm / sbin/ipvsadm-C # Bring down the VIP interface / sbin/ifconfig eth0:1 down / sbin/route del $VIP / bin/rm-f / var/lock/subsys/ipvsadm echo "ipvs is stopped...";; status) if [!-e / var/lock/subsys/ipvsadm]; then echo "ipvsadm is stopped..." Else echo "ipvs is running..." Ipvsadm-L-n fi;;*) echo "Usage: $0 {start | stop | status}";; esac

Realserver script:

#! / bin/bash## Script to start LVS DR real server.# description: LVS DR real server#. / etc/rc.d/init.d/functionsVIP=192.168.0.219host= `/ bin/ hostname`case "$1" instart) # Start LVS-DR real server on this machine. / sbin/ifconfig lo down / sbin/ifconfig lo up echo 1 > / proc/sys/net/ipv4/conf/lo/arp_ignore echo 2 > / proc/sys/net/ipv4/conf/lo/arp_announce echo 1 > / proc/sys/net/ipv4/conf/all/arp_ignore echo 2 > / proc/sys/net/ipv4/conf/all/arp_announce / sbin/ifconfig lo:0$ VIP broadcast $VIP netmask .255.255.255 up / sbin/route add-host $VIP dev lo:0 ; stop) # Stop LVS-DR real server loopback device (s). / sbin/ifconfig lo:0 down echo 0 > / proc/sys/net/ipv4/conf/lo/arp_ignore echo 0 > / proc/sys/net/ipv4/conf/lo/arp_announce echo 0 > / proc/sys/net/ipv4/conf/all/arp_ignore echo 0 > / proc/sys/net/ipv4/conf/all/arp_announce;;status) # Status of LVS-DR real server. Islothere= `/ sbin/ifconfig lo:0 | grep $VIP` isrothere= `netstat-rn | grep "lo:0" | grep $VIP` if [! "$islothere"-o! Isrothere]; then # Either the route or the lo:0 device # not found. Echo "LVS-DR real server Stopped." Else echo "LVS-DR real server Running." Fi;;*) # Invalid entry. Echo "$0: Usage: $0 {start | status | stop}" exit 1 politics ESAC

Note: this script comes from the Internet.