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Using Jib to build containers

Introduction

This project uses Google Jib to build optimised Docker/OCI images, without the need for a Dockerfile and Docker Engine.

The Maven plugin supports the definition of the container in pom.xml and provides new goals to build a container. The full documentation for the Maven Plugin can be found here.

Multiple Platform Support

Jib supports building container images for multiple platform architectures e.g. linux/amd64, linux/arm64.

Note: in order to achieve this the base image must support the desired platforms.

Amazon Corretto

The Amazon Corretto OpenJDK 11 base image supports both linux/amd64 and linux/arm64.

Build to remote container registry

Jib supports build and pushing of images to a cloud container registry including:

  • DockerHub
  • Google Container Registry (GCR)
  • AWS Elastic Container Registry (ECR)
  • Azure Container Registry (ACR)
  • JFrog Container Registry (JCR)

The following command can be used to build and push images to a registry.

mvn compile jib:build

The configuration of the destination registry and authentication methods are documented here:

Build to a local docker registry

The following steps describe how to build to a local registry

  1. Launch a local docker registry
docker run -d -p 5001:5000 --name registry registry:2
  1. Set docker.registry property in pom.xml
<docker.registry>localhost:5001/</docker.registry>
  1. Set docker.allowInsecureRegistries property in pom.xml
<docker.allowInsecureRegistries>true<docker.allowInsecureRegistries>
  1. Run the build
mvn compile jib:build

Build to a local docker daemon

Jib supports building an image directly to a local docker daemon. However it is not possible to build for multiple platforms with this approach.

In order to build an image for a specific platform (either linux/amd64 or linux/arm64) two maven profiles have been configured:

Profile: docker-amd64

mvn compile jib:dockerBuild -P docker-amd64

Profile: docker-arm64

mvn compile jib:dockerBuild -P docker-arm64