upstream yaoyafei.com{           地址池

   server 192.168.1.11:89 weight=10;     代理的地址和端口 权重weight=10 
   server 192.168.1.12:89 weight=10;

}
server{                                   创建新的虚拟机
    listen 80;                            负载均衡控制节点监听的端口号
    server_name yaoyafei.com;             服务域名

    location / {
     proxy_pass   http://yaoyafei.com;
     proxy_set_header Host $Host;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     }
}