location / {

    #设置主机头和客户端真实地址，以便服务器获取客户端真实IP

       proxy_set_header Host $host;

       proxy_set_header X-Real-IP $remote_addr;

    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

       #禁用缓存

       proxy_buffering off;

       #设置反向代理的地址

       proxy_pass http://192.168.1.1;   

   }

upstream backend {

       #ip_hash;

       server 192.168.1.251;

       server 192.168.1.252;

       server 192.168.1.247;

     }

server {

    listen    80;

    server_name trffweb; 

    location / {

       #反向代理的地址

       proxy_pass http://backend;  

    }

}

worker_processes 1;

events {

  worker_connections 1024;

}

http {

  include    mime.types;

  default_type application/octet-stream;

  sendfile    on;

  keepalive_timeout 65;

upstream backend {

       #ip_hash;

       server 192.168.1.251;

       server 192.168.1.252;

       server 192.168.1.247;

     }

  server {

    listen    80;

    server_name 2; 

    location / {

    #设置主机头和客户端真实地址，以便服务器获取客户端真实IP

       proxy_set_header Host $host;

       proxy_set_header X-Real-IP $remote_addr;

    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

       #禁用缓存

       proxy_buffering off;

       #反向代理的地址

       proxy_pass http://backend;  

    }

  }
}