How to Dockerize a Spring Boot 3 application

If you're doing cloud native development with Spring Boot, you'll need to Dockerize your executable JAR file at some point in time.

There are a variety of Maven, Gradle and even Jenkins plugins or add-ons that will do that. But why not just do it on your own? It's easy.

Just create a Dockerfile in the same folder as your Spring Boot executable JAR file. The contents of the JAR file look something like this:

FROM eclipse-temurin:17-jdk-alpine

Then, just build the JAR. In the same folder as the JAR files and the Dockerfile, run:

docker build -t spring-app:latest

That will build your image and then you can run it locally with a command like:

docker run -p 8099:8080 -t spring-app:latest

If you really wanted to, you could tag the image:

docker images (to find your image id)
docker tag **??a70e7b4f9e4d?? cameronmcnz/spring-app:latest

Then just do a Docker login and push the image to Docker hub!

docker long
docker push cameronmcnz/spring-app:latest

It really couldn't be easier to Dockerize a Spring Boot 3 app and push that Spring Boot docker image up to DockerHub.

[manisa]

You are awesome sir. Thank you so much for this.

[Voldeblort]

0:58 the walmart phun was painful 😢

Well executed dad joke. Salute, Sir.! 👌✌

[Niophyte]

Can you please explain when to use apache image and deploy the war file and when to do it the way you explained? For kube clusters, production maybe?

[kimelironald]

Hi Mackenzie. How can I connect to my local MySQL from the Docker container. My database is installed in my host Ubuntu 22.04