利用脚本实现 lvs 调度

注：根据实际情况修改脚本

# 在LVS主机上运行脚本
[root@LVS ~]# cat lvs_dr_vs.sh
#!/bin/bash
vip='172.16.0.100'
iface='lo:1'
mask='255.255.255.255'
port='80'
rs1='10.0.0.7'
rs2='10.0.0.17'
scheduler='wrr'
type='-g'
rpm -q ipvsadm &> /dev/null || yum install ipvsadm -y &> /dev/null
case $1 in
start)
    ifconfig $iface $vip netmask $mask # broadcast $vip up
    iptables -F
    ipvsadm -C
    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
[root@LVS ~]# bash lvs_dr_vs.sh start
The VS Server is Ready!

# 在RS后端服务器运行脚本
[root@RS1 ~]# cat lvs_dr_rs.sh
#!/bin/bash
vip=172.16.0.100
mask='255.255.255.255'
dev=lo:1
rpm -q httpd &> /dev/null || yum install httpd -y &> /dev/nul
systemctl enable -now httpd &> /dev/null && echo "The httpd Server is Ready!"
echo "`hostname -I`" > /var/www/html/index.html

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
    echo "The RS Server is Ready!"
;;
stop)
    ifconfig $dev down
    echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
    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

[root@RS1 ~]# bash lvs_dr_rs.sh start
The RS Server is Ready!