worker_processes  1;#==工作程序數，一般設定為cpu核心數
events {       
    worker_connections  1024; #==最大連線數，一般設定為cpu*2048
}
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;   
    keepalive_timeout  65; #==客戶端連結超時時間
    upstream  MyServer {
       server 127.0.0.1:9001;
       server 
 
127.0.0.1:9002;
       server 127.0.0.1:9003;
    }  
    upstream host1 {
       server 127.0.0.1:9001;
    }
    upstream host2 {
       server 127.0.0.1:9002;
    } 
    upstream default {
       server 127.0.0.1:9003;
    }
    map $COOKIE_version $group {
       ~*v1$ host1;
       ~*v2$ host2;
       default default;
    } 
    server {      
        listen 
 
99;   #站點監聽埠        
        server_name  www.nginxtest.com; #服務啟動後直接站點訪問域名       
        charset utf-8;  #編碼格式，避免url引數亂碼
        location / {  
             #proxy_pass  http://MyServer;  #對映到多個站點
             proxy_pass http://$group; #根據COOKIE中version的值做對應的站點對映
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        } 
    } 
}