Mapping address to multiple tomcat instances

Question

I have 3 tomcat instances running on Windows Server 2008 machine. Each one with one app:

• http://host:8080/app0
• http://host:8081/app1
• http://host:8082/app2

How I can configure my server to map an address without the port number?

• http://host/app0
• http://host/app1
• http://host/app2

Is it a tomcat configuration or something with DNS?

Thanks.

---

Ok, I tried the following:

• Set up the Apache 2.2
• Configure httpd.conf loading proxy modules

• And add a proxy module configuration:

  ProxyRequests Off
  ProxyPass /app1 http://machine:8081/app
  ProxyPassReverse /app1 http://machine:8081/app
  
  <Location "/app">
    Order allow,deny
    Allow from all
  </Location>
  

Now the redirect works well local in the machine. But it doesn't works when I try access from another machine in the same network. (this another machine can ping 'machine' host. And I tried putting the ip number too).

Answer 1

Try mod proxy configuration on below code in httpd:

ProxyPass           /app0   http://localhost:8080/app0/
ProxyPassReverse    /app0   http://localhost:8080/app0/
ProxyPass           /app1   http://localhost:8081/app1/
ProxyPassReverse    /app1   http://localhost:8081/app1/
ProxyPass           /app2   http://localhost:8082/app2/
ProxyPassReverse    /app2   http://localhost:8082/app2/

Answer 2

You can use nginx (http://nginx.org/en/docs/) as proxy for example.

Try simply (no load balancing etc.):

    server {

    listen here.your.ip:80/YourApp;

    location / {
        root /path/to/your/webapp;
        proxy_pass http://host:8080/YourApp;
    }

}

Same way for other ports

Answer 3

It is quite common to use multiple Tomcats behind Apache to do load balancing. While this is not load balancing the principle is the same. Instead of having one application with 3 load-balanced Tomcat workers, you would have 3 applications with 1 tomcat worker each.

You can find the tomcat documentation here: http://tomcat.apache.org/connectors-doc/