LVS集群DR模式
系统：CentOS-7-x86_64-Minimal-1611.iso
三台虚拟机网络规划：
Director （桥接网卡）
enp0s3
DIP:192.168.43.201
192.168.43.1
enp0s3:0
VIP:192.168.43.200
Realserver One（桥接网卡）
enp0s3
RIP:192.168.43.202
192.168.43.1
lo:0
VIP:192.168.43.200
Realserver Two（桥接网卡）
enp0s3
RIP:192.168.43.202
192.168.43.1
lo:0
VIP:192.168.43.200
一 Director网络配置
1.配置DIP
[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-enp0s3
IPADDR=192.168.43.201
GATEWAY=192.168.43.1
DNS1=8.8.8.8
DNS2=114.114.114.114
2.安装ifconfig
[root@localhost ~]# sudo yum install net-tools
3.配置网卡enp0s3:0
[root@localhost ~]# ifconfig enp0s3:0 192.168.43.200
4.添加路由
[root@localhost ~]# route add -host 192.168.43.200 dev enp0s3:0
二 RealServer配置
将RealServer网络设置成桥接模式，上传TOMCAT，并安装JDK。
1.关闭防火墙
[root@localhost ~]# systemctl stop firewalld.service
[root@localhost ~]# systemctl disable firewalld.service
如不关闭防火墙测试时会报错（No route to host）
2.配置RIP
[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-enp0s3
IPADDR=192.168.43.202（203）
GATEWAY=192.168.43.1
DNS1=8.8.8.8
DNS2=114.114.114.114
（此时不能配置VIP）
3.配置对ARP请求响应级别以及将自己地址向外通告的通告级别
[root@localhost conf]# echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce [root@localhost conf]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore [root@localhost conf]# echo 2 > /proc/sys/net/ipv4/conf/enp0s3/arp_announce [root@localhost conf]# echo 1 > /proc/sys/net/ipv4/conf/enp0s3/arp_ignore
4.配置VIP
[root@localhost conf]# ifconfig lo:0 192.168.43.200
[root@localhost conf]# ifconfg lo:0 192.168.43.200 broadcast 192.168.43.200 netmask 255.255.255.255 up
#配置路由
[root@localhost conf]# route add -host 192.168.43.200 dev lo:0
5.物理机验证
ping 192.168.43.200
#查看路由的IP是否与Director enp0s3网卡 MAC地址绑定 arp -a
#删除所有arp解析
arp -d *
6. 修改Tomcat默认启动端口为80
~/tomcat/conf/server.xml
7.修改Tomcat默认主页
~/tomcat/bin/webappes/ROOT/index.jsp
<html>
<head>
</head>
<body>
<div>
RealServer One（Two）
</div>
</body>
</html>
三 配置规则
[root@localhost ~]# ipvsadm -C
[root@localhost ~]# ipvsadm -A -t 192.168.43.200:80 -s wlc
[root@localhost ~]# ipvsadm -a -t 192.168.43.200:80 -r 192.168.43.202 -g -w 2
[root@localhost ~]# ipvsadm -a -t 192.168.43.200:80 -r 192.168.43.203 -g -w 1
[root@localhost ~]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.43.200:80 wlc
-> 192.168.43.202:80 Route 2 0 0
-> 192.168.43.203:80 Route 1 0 0
[root@localhost ~]#
验证：浏览器访问Director主机http://192.168.43.201，RealServer One 和RealServer Two交替出现。
