Simple configuration method for load balancing of nginx

http  
    {  
      upstream www.test2.com {  
                server 10.1.165.36:80  weight = 3;          
        server 10.249.198.235;  
             server 10.1.168.1  down;   
             server 10.1.168.2  backup;  
            #ip_hash;  
       }  
      server  
      {  
            location / {  
                  proxy_pass        http://www.test2.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;  
                  }  
    } 

Nginx load balancing requires adding upstream   and proxy_pass in Server

server 10.1.165.36:80   weight = 3;   means that this server will be accessed at 3 times the same rate
server 10.1.168.1   down;   is not in use for the time being
server 10.1.168.2   backup; It starts when you're under a lot of pressure
ip_hash; hash matching via IP address. However, there will be some disadvantages. For example, if Nginx is not in the outermost layer, IP cannot be acquired
proxy_pass http: / / www. test2. com   represent access url