This demo project showcases how to use Cloud Native Buildpacks
to build secure Docker images, using a single command.

Buildpacks provide a higher-level abstraction for building apps compared to Dockerfiles.
Cloud Native Buildpacks embrace modern container standards, such as the OCI image format.
They take advantage of the latest capabilities of these standards,
such as cross-repository blob mounting and image layer “rebasing” on Docker API v2 registries.

See the announcement about Cloud Native Buildpacks.

You need the following components to build your first Docker image with Cloud Native Buildpacks:

• a running Docker daemon
• the CLI pack, responsible for building & packaging your app

Install pack using these instructions.

The Docker image will contain a single Java app using Spring Boot.
Thanks to pack, we’re going to build this app and package it as a Docker image:

$ pack build cloudnativebuildpacks101

You don’t even need a JDK nor Maven to build this app. The java-buildpack is automatically
downloaded: it is responsible for building the app, and making sure the resulting Docker
image is secure and ready to deploy.

You are now ready to run the app using Docker:

$ docker run --rm -p 8080:8080/tcp cloudnativebuildpacks101

Just go to http://localhost:8080 to see the result.

In case you already have a Kubernetes cluster, you may want to deploy this app to see it
in action. Feel free to use this Kubernetes descriptor:

$ kubectl apply -f deploy/k8s.yml

You can also deploy Docker images to Cloud Foundry:

$ cf push -f deploy/docker-on-cloudfoundry.yml

In the end, don’t forget that Spring Boot apps are meant to be deployed
in a PaaS like Cloud Foundry, since it’s way easier than maintaining Docker images:

$ cf push -f deploy/cloudfoundry.yml

It’s up to you to choose among all these deployment options the one
that better suits you.

Contributions are always welcome!

Feel free to open issues & send PR.

Copyright © 2019 Pivotal Software, Inc.

This project is licensed under the Apache Software License version 2.0.