Nginx+tomcat Implement reverse proxy __nginx

The usual proxy server, which is used only for proxy internal network connection requests to the Internet, the client must specify a proxy server and send the HTTP request that was intended to be sent directly to the Web server to the proxy server to initiate a request to the Web server on the Internet by the proxy server, Finally reach the client's purpose of Internet access.

The reverse proxy (Reverse proxy) means to accept a connection request on the Internet with a proxy server, then forward the request to a server on the internal network and return the results obtained from the server to the client requesting the connection on the Internet, At this point, the proxy server behaves as a reverse proxy server. As shown in the following illustration:

Figure A reverse proxy server

Let's take a look at how to implement a reverse proxy using Nginx+tomcat.

first, the realization of the scene

Two tomcat servers via Nginx reverse proxy, this example is implemented with two virtual machines, one virtual machine provides ngxin service, and the other virtual machine provides two Tomcat services.

Nginx Load Balancer: 192.168.0.103

tomcat1:192.168.0.106:8080

tomcat2:192.168.0.106:8081

When configured, start Tomcat

Figure II Tomcat+nginx implementation of load Balancing configuration

Second, configure the host file

We visit Tomcat running on different ports by accessing different domain names, which requires configuring our host file;

Www.test1.com access to Tomcat running on port 8080

Www.test2.com access to Tomcat running on port 8081

Add the following domain name configuration in the C:\Windows\System32\drivers\etc\hosts file:

192.168.0.106 www.test1.com
192.168.0.106 www.test2.com

Third, Nginx reverse proxy configuration

According to our configuration above, the reverse proxy is configured in the nginx.conf file as follows:

#配置一个代理即tomcat1服务器
        upstream Tomcat_server1 {
            server 192.168.0.106:8080;
        }
		
#配置一个代理即tomcat2服务器
	upstream Tomcat_server1 {
            server 192.168.0.106:8081;
        }
		
#配置一个虚拟主机
		server {
			listen;
			server_name www.test1.com;
			Location/{
					#域名www. test1.com requests are forwarded to Tomcat_server1 TOMCAT1 service
					proxy_pass http://tomcat_server1;
					#欢迎页面, find the page
					index index.jsp index.html index.htm
			}
		
		in Left-to-right order server {
			listen Bayi;
			server_name bbb.test.com;
			Location/{
				 #域名www. test2.com requests are forwarded to Tomcat_server2 TOMCAT2 service
                  proxy_pass http://tomcat_server2;
                  Index index.jsp index.html index.htm
			}
		}

Iv. Modifying the access page for Tomcat

Modify the contents of the webapps/root/index.jsp under two Tomcat respectively, using the TOMCAT1 and TOMCAT2 two services first to display different content, as follows:

TOMCAT1 under the index.jsp modified:

The index interface of figure three TOMCAT1

TOMCAT2 under the index.jsp modified:

Figure Four the index interface of TOMCAT2

Five, Test

Start the Nginx server, respectively, to access the www.test1.com and www.test2.com test the reverse proxy.