基于 CentOS 7 构建 LVS-DR 群集以及配置nginx负载均衡

目录

一、基于 CentOS 7 构建 LVS-DR 群集

1、前期准备

1、关闭防火墙

2、安装ifconfig

3、准备四台虚拟机

2、在DS上

2.1、配置LVS虚拟IP

2.2、手工执行配置添加LVS服务并增加两台RS

2.3、查看配置

3、在RS端（第三台、第四台） 上

3.1、配置Web服务器

3.2、配置默认主页

3.3、启动服务

3.4、测试：在客户端访问web服务器

3.5、绑定VIP

3.6、配置主机路由

3.7、抑制ARP响应

4、在客户端上测试

 二、配置nginx负载均衡

1、安装部署nginx

2、内网服务器151

3、内网服务器152

4、代理服务器150

5、客户端

一、基于 CentOS 7 构建 LVS-DR 群集

1、前期准备

1、关闭防火墙

[root@localhost ~]# systemctl stop firewalld

2、安装ifconfig

yum install net-tools.x86_64 -y

3、准备四台虚拟机

ip	用途
192.168.226.150	客户端
192.168.226.151	lvs
192.168.226.152	RS
192.168.226.153	RS

2、在DS上

2.1、配置LVS虚拟IP

安装ipvsadm
yum install ipvsadm -y

增加IP
ifconfig ens33:200 192.168.226.200 netmask 255.255.255.255 up

2.2、手工执行配置添加LVS服务并增加两台RS

[root@localhost ~]# ipvsadm -C
[root@localhost ~]# ipvsadm -A -t 192.168.226.200:80 -s rr
[root@localhost ~]# ipvsadm -a -t 192.168.226.200:80 -r 192.168.226.151:80 -g
[root@localhost ~]# ipvsadm -a -t 192.168.226.200:80 -r 192.168.226.152:80 -g

2.3、查看配置

3、在RS端（第三台、第四台） 上

3.1、配置Web服务器

yum install httpd -y

3.2、配置默认主页

hostname -I 取地址

[root@backup ~]# echo "web test page, ip is `hostname -I`." > /var/www/html/index.html

3.3、启动服务

[root@backup ~]# systemctl start httpd

3.4、测试：在客户端访问web服务器

[root@localhost ~]# curl 192.168.226.147
web test page, ip is 192.168.226.147 .
[root@localhost ~]# curl 192.168.226.148
web test page, ip is 192.168.226.148 .

3.5、绑定VIP

ifconfig lo:200 192.168.226.200 netmask 255.255.255.255 up

3.6、配置主机路由

route add -host 192.168.226.200 dev lo

3.7、抑制ARP响应

调整内核参数，关闭arp响应

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、在客户端上测试

 二、配置nginx负载均衡

1、安装部署nginx

在linux系统上部署Nginx_搞笑狗的博客-CSDN博客

2、内网服务器151

[root@localhost ~]# vim /etc/nginx/conf.d/vhost.conf
server {
        listen 80;
        server_name web1.yunjisuan.com;

        location / {
                root /usr/share/nginx/html/web1;
                index index.html index.htm;
        }
        access_log /usr/share/nginx/html/web1/logs/access_bbs.log main;

}
[root@localhost ~]# mkdir -p /usr/share/nginx/html/web1/logs
[root@localhost ~]# echo "`hostname -I `web1" > /usr/share/nginx/html/web1/index.html
[root@localhost ~]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
[root@localhost ~]# systemctl restart nginx

3、内网服务器152

[root@localhost ~]# vim /etc/nginx/conf.d/vhost.conf
server {
        listen 80;
        server_name web1.yunjisuan.com;

        location / {
                root /usr/share/nginx/html/web1;
                index index.html index.htm;
        }
        access_log /usr/share/nginx/html/web1/logs/access_bbs.log main;

}


[root@localhost ~]# mkdir -p /usr/share/nginx/html/web1/logs
[root@localhost ~]# echo "`hostname -I `web1" > /usr/share/nginx/html/web1/index.html
[root@localhost ~]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
[root@localhost ~]# systemctl restart nginx

4、代理服务器150

[root@localhost ~]# vim /etc/nginx/conf.d/lb_test.conf
upstream www_server_pools {
        server 192.168.226.151:80 weight=1;
        server 192.168.231.152:80 weight=1;
}
server {
        listen 80;
        server_name web1.haha.com;
        location / {
                proxy_pass http://www_server_pools;
                proxy_set_header Host $host;
        }
}

5、客户端

[root@localhost ~]# vim /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.226.150 web1.haha.com
[root@localhost ~]# for ((i=1;i<=6;i++)); do curl web1.haha.com; done
192.168.226.152 web1
192.168.226.151 web1
192.168.226.152 web1
192.168.226.151 web1
192.168.226.152 web1
192.168.226.151 web1