LVS的DR模式实现

功能实现：

实验环境为：前端lvs4层负载均衡做流量转发，后端web server为2台nginx。

LVS: 10.10.101.224

VIP: 10.10.101.240

RIP1: 10.10.101.225

RIP2: 10.10.101.226

禁用防火墙和selinux

systemctl disable firewalld

systemctl stop firewalld

setenforce 0

1. nginx服务器搭建

   1.1安装编译系统环境

   yum install c gcc gcc-c++

1.2 编译安装PCRE&ZLIB

1.3 编译安装nginx

./configure --prefix=/usr/local/nginx --sbin-path=/usr/local/nginx/nginx --conf-path=/usr/local/nginx/nginx.conf --pid-path=/usr/local/nginx/nginx.pid --with-pcre=/usr/local/pcre-8.40 --with-zlib=/usr/local/zlib-1.2.11

1.4 为检查实验效果，index.html内容替换为IP地址。

2.  配置director

2.1  10.10.101.224上安装ipvsadm

yum install -y ipvsadmin*

2.2 配置VIP

ifconfig eth0:0 10.10.101.240 netmask 255.255.255.255

route add -host 10.10.101.240 dev eth0:0

2.3 配置LVS

ipvsadm -C

ipvsadm -At 10.10.101.240:80 -s rr

ipvsadm -at 10.10.101.240:80 -r 10.10.101.225:80 -g

ipvsadm -at 10.10.101.240:80 -r 10.10.101.226:80 -g

ipvsadm -L -n

2.4 查看LVS

ipvsadmin

[[email protected] ~]# ipvsadm

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port           Forward Weight ActiveConn InActConn

TCP  10.10.101.240:http rr

-> 10.10.101.225:http           Route   1      0          0

-> 10.10.101.226:http           Route   1      0          0

3 Real server 配置

ifconfig lo:0 10.10.101.240 netmask 255.255.255.255 broadcast 10.10.101.240

route add -host 10.10.101.240 dev lo:0

echo "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore

echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce

echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore

echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce

4 验证