#!/bin/bash
# Author:Lin yao hong
#LVS scripts

. /etc/init.d/functions
Netdev=ens33
Gw=10.10.10.1
VIP=10.10.10.12
SUBNET="${Netdev}:`echo $VIP | awk -F "." '{print $4}'`"
PORT=80
RIP=(

10.10.10.20
10.10.10.21

)

function start(){
    
    if [ `ifconfig | grep $VIP | wc -l` -ne 0 ];then
        stop
    fi
    #ifconfig $SUBNET $VIP broadcast $VIP netmask 255.255.255.0 up
    ifconfig $SUBNET  $VIP/24 up
    route add -host ${VIP} dev  ${Netdev}
    ipvsadm -C
    ipvsadm --set 30 5 60
    ipvsadm -A -t $VIP:$PORT -s wrr -p 20
    for ((i=0;i<${#RIP[*]};i++))
    do
        ipvsadm -a -t $VIP:$PORT -r ${RIP[$i]} -m -w 1
    done

}

function stop(){

    arping -c 1 -I ${Netdev} -s ${VIP} ${Gw}
    ipvsadm -C
    if [ `ifconfig | grep $VIP | wc -l` -ne 0 ];then
        ifconfig $SUBNET down
    fi
    route del -host $VIP dev ${Netdev} &>/dev/null
}

case "$1" in 
    start)
        start
        action "ipvs is started"  /bin/true
    ;;
    stop)
        stop
        action "ipvs is stopped" /bin/true
    ;;
    restart)
        stop
        action "ipvs is stopped" /bin/true
        start
        action "ipvs is started" /bin/true
    ;;  
    *)
    echo "USAGE:$0 {start | stop | restart}"
esac