nginx实现负载均衡及轮询

## nginx实现负载均衡及轮询
- what: nginx实现负载均衡及轮询
- where: centos7
- when: 2022.6.11
- who: JRT
- why: 记录
- how:

```
upstream JRT{

server doc:10086 weight=2;

server 1.117.176.116:9005 weight=1;

}

server {
        listen 80 default backlog=2048;                                                                  
        server_name  www.jiaorongtao.top;
	return 301 https://$server_name$request_uri;
} 
 
server { 
#        listen 80 default backlog=2048;                                                                  
        listen 443 ssl;                                                    
        server_name  www.jiaorongtao.top;         
        client_max_body_size 5000m;
        ssl_certificate /etc/nginx/ssl/www.jiaorongtao.top.pem;              
        ssl_certificate_key /etc/nginx/ssl/www.jiaorongtao.top.key;          
        ssl_session_timeout 5m;                                            
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;                               
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:HIGH:!aNULL:!MD5:!RC4:!DHE;
        ssl_prefer_server_ciphers on;                                      
        location / {                                                       
          proxy_pass http://JRT;                                 
        }                                                                  
}

}

```