Décrire en détail les exemples multi-segments VIP et DIP de LVS-DR

eth0:公网IP接入INTERNET
eth1:172.18.68.10(公网IP)                     #实验环境中使用172.18.68.10做公网IP
eth2:10.10.0.1内网IP

在上面的配置中eth0、eth2、VIP一共使用了3个公网IP。还可以缩减成两个公网IP。
即eth1不配置公网IP，在路由上添加主机路由 route add -host 172.18.68.100 dev eth2 ，也能达到相同的效果。

#!/bin/bash
#Author:shuaiguoxia.com
#Date:2017-10-23
vip='172.18.0.100'
iface='eth0:1'
mask='255.255.255.255'
port='80'
rs1='10.10.0.72'
rs2='10.10.0.73'
scheduler='wrr'
type='-g'
case $1 in
start)
    ifconfig $iface $vip netmask $mask broadcast $vip up
    iptables -F
    ipvsadm -A -t ${vip}:${port} -s $scheduler
    ipvsadm -a -t ${vip}:${port} -r ${rs1} $type -w 1
    ipvsadm -a -t ${vip}:${port} -r ${rs2} $type -w 1
    echo "The VS Server is Ready!"
    ;;
stop)
    ipvsadm -C
    ifconfig $iface down
    echo "The VS Server is Canceled!"
    ;;
*)
    echo "Usage: $(basename $0) start|stop"
    exit 1
    ;;
esac

./dr-vs.sh start              #dr-vs.sh为脚本名

#!/bin/bash
#Author:shuaiguoxia.com
#Date:2017-10-23
vip=172.18.68.100
mask='255.255.255.255'
dev=lo:1
case $1 in
start)
    echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
    echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
    echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
    echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
    ifconfig $dev $vip netmask $mask broadcast $vip up
    route add -host $vip dev $dev
    echo "The RS Server is Ready!"
    ;;
stop)
    ifconfig $dev down
    echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore3
    echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore
    echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
    echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce
    echo "The RS Server is Canceled!"
    ;;
*) 
    echo "Usage: $(basename $0) start|stop"
    exit 1
    ;;
esac

./dr-rs.sh start              #dr-rs.sh为脚本名