nginx load balancing

Step 1: Set up a server group

  upstream backend{ 
 　　　　#weight is the weight, if not set, the default is polling
        server 192.168.98.92:8081 weight=5;
        server 192.168.98.100:8081  weight=5;
        server 192.168.98.98:8081  weight=1;
   }

Step 2: Set up the reverse proxy backend server

server{
　　listen 80;
　　server_name cx.com;
　　index index.html index.php;
　　location / {
　　　　proxy_pass http://backend;
　　　　proxy_set_header Host $host;
　　}
}