linux LVS DR脚本

脚本示例：

#!/bin/bash
### BEGIN INIT INFO
# Provides:
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start realserver
# Description:       Start realserver
### END INIT INFO

# change the VIP to proper value
VIP=10.65.32.28

case "$1" in
    start)
    # Start of LVS-DR real server
    echo "Start Real Server"
    /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 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
    ;;

    stop)
    # Stop of LVS-DR real server
    /sbin/ifconfig lo:0 down
    echo "Stop Real Server"
    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 $VIP`
    # Either the route or the lo:0 device
    if [ ! "$islothere" -o ! "isrothere" ];then
        echo "LVS-DR real server Stopped."
    else
        echo "LVS-DR real server Running."
    fi
    ;;

    restart)
    # Restart of LVS-DR real server
    echo "Restart Real Server"
    $0 stop
    $0 start
    ;;

    *)
    echo "Usage: $0 {start|stop|restart|status}"
    exit 1

    ;;
esac

exit 0