author：JevonWei
版权声明：原创作品
实现LVS-DR调度web模式
- 拓扑环境
网络环境
RS1
RIP 192.168.198.138/24
VIP 192.168.198.100/32
GW 192.168.198.130
RS2
RIP 192.168.198.132/24
VIP 192.168.198.100/32
GW 192.168.198.130
VS
DIP 192.168.198.128/24
VIP 192.168.198.100/32
GW 192.168.198.130
route
192.168.198.130/24
172.16.253.166/16
Client
172.16.254.150/16
GW 172.16.253.166
RS1,RS2的网关指向192.168.198.130
RS1
[root@RS1 html]# route del default gw 192.168.198.128
[root@RS1 html]# route add default gw 192.168.198.130
[root@RS1 ~]# iptables -F
[root@RS1 ~]# yum -y install httpd
[root@RS1 ~]# vim /var/www/html/index.html
welcome to RS1
[root@RS1 ~]# service httpd start
RS2
[root@RS2 network-scripts]# route add -net 172.16.0.0/16 gw 192.168.198.130
[root@RS2 network-scripts]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
172.16.0.0 192.168.198.130 255.255.0.0 UG 0 0 0 ens34
192.168.198.0 0.0.0.0 255.255.255.0 U 100 0 0 ens34
[root@RS2 ~]# iptables -F
[root@RS2 ~]# yum -y install httpd
[root@RS2 ~]# vim /var/www/html/index.html
welcome to RS2
[root@RS2 ~]# systemctl start httpd
VS
添加网关路由信息
[root@VS ~]# route add default gw 192.168.198.130
[root@VS ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.198.130 0.0.0.0 UG 0 0 0 ens34
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
192.168.198.0 0.0.0.0 255.255.255.0 U 100 0 0 ens34
[root@VS ~]# vim lvs_dr.sh
#! /bin/bash
vip=192.168.198.100
server=$vip:80
rip1=192.168.198.138
rip2=192.168.198.132
sch=wlc
dev=ens34:1 \\绑定网卡ens34
case $1 in
start)
ifconfig $dev $vip/32 broadcast $vip \\绑定vip到ens34网卡上
iptables -F
ipvsadm -A -t $server -s $sch
ipvsadm -a -t $server -r $rip1 -g -w 3
ipvsadm -a -t $server -r $rip2 -g -w 1
;;
stop)
ipvsadm -C
ipconfig $dev down
;;
*)
echo "Usage:$(basename $0) start|stop"
exit 1
;;
esac
[root@danran ~]# bash lvs_dr.sh start
[root@danran ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.198.100:80 wlc
-> 192.168.198.132:80 Route 1 0 0
-> 192.168.198.138:80 Route 3 0 0
添加RS1和RS2的VIP
dr_vip_rs.sh 为添加RS服务端VIP地址的脚本
[root@RS1 ~]# vim dr_vip_rs.sh
#!/bin/bash
#
vip=192.168.198.100
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 "VS 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 "VS server is Cancel"
;;
*)
echo "Usage $(basename $0) start|stop"
exit 1
;;
esac
[root@RS1 ~]# bash dr_vip_rs.sh start
VS server is Ready
[root@RS2 ~]# bash dr_vip_rs.sh start
VS server is Ready
client
添加路由
[root@danran ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth0
172.16.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 172.16.0.1 0.0.0.0 UG 0 0 0 eth0
[root@danran ~]# route del default gw 172.16.0.1
[root@danran ~]# route add default gw 172.16.253.166 \\添加默认路由
[root@danran ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth0
172.16.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 172.16.253.166 0.0.0.0 UG 0 0 0 eth0
测试
[root@danran ~]# for i in {1..10};do curl --connect-timeout 1 192.168.198.100 ;sleep 1;done
welcome to RS2
welcome to RS1
welcome to RS1
welcome to RS1
welcome to RS2
welcome to RS1
welcome to RS1
welcome to RS1
welcome to RS2
welcome to RS1