nginx实现负载均衡

server5:作为负载均衡调度器

[root@server5 cc]# cd /usr/local/nginx/conf/
[root@server5 conf]# lscpu
CPU(s):                2
[root@server5 conf]# vim nginx.conf
  1 user  nginx;
  2 worker_processes 2;	  //cpu数
  3 worker_cpu_affinity 01 10;	//Worker和cpu绑定

 12 events {
 13     worker_connections  65535;    //每个worker的最大处理量
 14 }

 17 http {
 18         upstream westos{
 19         server 172.25.27.2:80 weight=3;	//后端端口可以不是80，支持端口转发,weight表示权重
 20         server 172.25.27.3:80;
 21         server 127.0.0.1:80 backup;
 22         }

122         server{
123         listen 80;
124         server_name www.westos.org;
125 
126         location / {
127         proxy_pass http://westos;
128         }
129 
130                 }
131 }
[root@server5 conf]# useradd -M -d /usr/local/nginx/ nginx
[root@server5 conf]# vim /etc/security/limits.conf 
 52   nginx           -       nofile          65535
[root@server5 conf]# nginx -t
[root@server5 conf]# nginx -s reload

server2：后端的web服务器

[root@server2 ~]# cd /var/www/html/
[root@server2 html]# vim index.html
server2
[root@server2 html]# /etc/init.d/httpd start

server3:后端的web服务器

[root@server3 ~]# cd /var/www/html/
[root@server3 html]# vim index.html
server3
[root@server3 html]# /etc/init.d/httpd start

真机：测试机器

[root@foundation29 ~]# vim /etc/hosts
172.25.27.5 www.westos.org       bbs.westos.org         westos.org

测试：

for i in range(10): do curl www.westos.org done