nginx的四層負載均衡和七層負載均衡的區別

所謂四層就是基於IP+端口的負載均衡，通過虛擬IP+端口接收請求，然后再分配到真實的服務器；

[root@linux-node1 conf]# vim nginx.conf 
        
worker_processes  1;
events {
    worker_connections  1024;
}
#類似於7層的http段
upstream ssh_proxy {
        hash $remote_addr consistent;
        server 192.168.56.2:22;
        server 192.168.56.3:22;
}

server {
        listen 2222;
        proxy_connect_timeout 1s;
        proxy_timeout 3s;
        proxy_pass ssh_proxy;
     }

}

 

七層通過虛擬的URL或主機名接收請求，然后再分配到真實的服務器七層就是基於URL等應用層信息的負載均衡。

七層負載：

[root@www ~]# cat /etc/nginx/conf.d/test.conf
upstream phpserver {
       server192.168.2.3;
       server192.168.2.4;
        }
upstream htmlserver {
       server192.168.2.1;
       server192.168.2.2;
       }

[root@www ~]# vim /etc/nginx/nginx.conf
location / {
            root  /usr/share/nginx/html;
            index  index.html index.htm;
            if ($request_uri ~*\.html$){
                 proxy_pass http://htmlserver;
                }
            if ($request_uri~* \.php$){
                       proxy_pass http://phpserver;
                }
}