How to set Domain name in Spring Boot App with embedded tomcat

Question

I am developing a application in spring boot with embedded tomcat. In my local which runs on a port 8080 and i can give url http://locahost:8080. How can change this to my domain? like www.mydomain.com which should work similar to localhost. How to configure this? I am using embedded tomacat not externally installed tomcat server.

Answer 1

First of all you need to have a domain registered.

Then you need to have a Machine in premise or in the Cloud whose Public IP address is mapped to the domain you registered, and that has the correct port (80) opened.

Then you need to start your Spring boot application to run on port 80 not 8080. You can do that by using CLI argument --server.port=80 or adding server.port=80 in application.properties file or application.yaml file.

Answer 2

If you are deploying this spring boot application as your primary service and not running it on a server that has Apache Web Server already installed, you can manually set the port 80, which is for HTTP requests. 443 is encrypted and thus HTTPS. You can set these settings on your firewall of your server.

However, if this Spring boot app happens to be something like an API, where it's just endpoints you want to hit from a website that you have on your server (running on something like an Apache Web Server), you're going to need to setup up a reverse proxy or else they will both be trying to use port 80:

https://medium.com/@codebyamir/using-apache-as-a-reverse-proxy-for-spring-boot-embedded-tomcat-f704da73e7c8

So you should leave the port as 8080 on the Spring app (running the embedded tomcat server), and your Apache Web Server should be using port 80 for say , your website at www.mydomain.com.

Thus, the proxy will redirect incoming HTTP requests to your Tomcat service at port 8080 and thus the endpoints will be triggered via www.mydomain.com/api-end-point-here