Google Cloud Platform Blog: Introducing Jib — build Java Docker images better

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Introducing Jib — build Java Docker images better

Monday, July 9, 2018

By Appu Goundan and Qingyang ChenJibMavenGradle

How Jib makes development better:

Simple - Jib is implemented in Java and runs as part of your Maven or Gradle build. You do not need to maintain a Dockerfile, run a Docker daemon, or even worry about creating a fat JAR with all its dependencies. Since Jib tightly integrates with your Java build, it has access to all the necessary information to package your application. Any variations in your Java build are automatically picked up during subsequent container builds.

Fast - Jib takes advantage of image layering and registry caching to achieve fast, incremental builds. It reads your build config, organizes your application into distinct layers (dependencies, resources, classes) and only rebuilds and pushes the layers that have changed. When iterating quickly on a project, Jib can save valuable time on each build by only pushing your changed layers to the registry instead of your whole application.

Reproducible - Jib supports building container images declaratively from your Maven and Gradle build metadata, and as such can be configured to create reproducible build images as long as your inputs remain the same.

How to use Jib to containerize your applicationMavenGradleconfigure Jib with credentials for your registrydocker-credential-gcr <plugin> <groupId>com.google.cloud.tools</groupId> <artifactId>jib-maven-plugin</artifactId> <version>0.9.0</version> <configuration> <to> <image>gcr.io/my-project/image-built-with-jib</image> </to> </configuration> </plugin># Builds to a container image registry. $ mvn compile jib:build # Builds to a Docker daemon. $ mvn compile jib:dockerBuildplugins { id 'com.google.cloud.tools.jib' version '0.9.0' } jib.to.image = 'gcr.io/my-project/image-built-with-jib'# Builds to a container image registry. $ gradle jib # Builds to a Docker daemon. $ gradle jibDockerBuildgithub.com/GoogleContainerTools/jib