How to create a docker file for a Ballerina program which uses Java interoperability?

Question

I have a Ballerina REST service which calls some Java methods from ballerina. I want to generate the Dockerfile for this application. How can I achieve this?

Answer 1

We can use the Ballerina Code-to-Cloud feature to generate the Dockerfile.

We can simply run the following command to generate the docker file:

$ bal build --cloud=docker

This will generate the Dockerfile in the following location: target/docker/<package-name>. This directory will have all the required JAR files including the ones used for Java interoperability.