nginx配置服务器负载均衡

 upstream servers {
        ip_hash; #hash，ip轮训
        server localhost:8400;   

  }  

server {
        listen       80;
        server_name  localhost;   #这里可以配置多个ip

        #charset koi8-r;  

        #access_log  logs/access.log  main;  

        location / {
         proxy_set_header   Host             $host;
         proxy_set_header   X-Real-IP        $remote_addr;
         proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
         proxy_pass http://servers;
         proxy_redirect off;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
}