Adding JDK and other packages directly onto Application Containers using APT buildpack

Products

• VMware Tanzu Application Service

Issue/Introduction

This KB article goes over the process of adding JDK packages onto an application container using the APT buildpack (https://github.com/cloudfoundry/apt-buildpack).

In general, you can bundle other packages other than JDK packages.

Environment

Tanzu Application Service

Resolution

1. Download a Spring Cloudfoundry sample application. In this example, we will choose the spring-music application: 

git clone https://github.com/cloudfoundry-samples/spring-music.git && cd spring-music

2. Create an apt.yml file in the spring-music folder:

---

packages:

- openjdk-8-jdk-headless

3. Build the spring-music application:

./gradlew clean assemble

4. Bundle the apt.yml file with the jar file:

jar uf build/libs/spring-music-1.0.jar ./apt.yml

5. Verify that the apt.yml file has been added to the application JAR:

jar tf build/libs/spring-music-1.0.jar | grep 'apt.yml'

6. Push the application using the apt buildpack AND the Java buildpack. More information about the apt buildpack can be found here

cf push -b https://github.com/cloudfoundry/apt-buildpack/releases/download/v0.3.9/apt-buildpack-cflinuxfs4-v0.3.9.zip -b java_buildpack_offline

7. SSH into the application container

cf ssh spring-music

8. Confirm that the openjdk-8-headless package has been added to the application dependencies folder: