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BUILDING.md

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Building Strimzi Kafka Bridge

Strimzi Kafka Bridge uses make as its main build system. Our make build supports several different targets, mainly for building the Java binaries and pushing Docker images.

Build Pre-Requisites

To build this project you must first install several command line utilities.

In order to use make these all need to be available in your $PATH.

Mac OS

The make build is using the GNU versions of the find and sed utilities and is not compatible with the BSD versions available on Mac OS. When using Mac OS, you have to install the GNU versions of find and sed. When using brew, you can do brew install gnu-sed findutils grep coreutils asciidoctor. This command will install the GNU versions as gcp, ggrep, gsed and gfind and our make build will automatically pick them up and use them.

Docker image

Building Docker images

The docker_build target will build the Docker image provided by the Strimzi Kafka Bridge project. You can build all Strimzi Docker images by calling make docker_build from the root of the repository. The docker_build target will always build the images under the strimzi organization. The DOCKER_TAG environment variable configures the Docker tag to use (default is latest).

Tagging and pushing Docker images

The docker_tag target can be used to tag the Docker images built by the docker_build target. This target is automatically called by the docker_push target and doesn't have to be called separately.

To configure the docker_tag and docker_push targets you can set following environment variables:

  • DOCKER_ORG configures the Docker organization for tagging/pushing the images (defaults to the value of the $USER environment variable)
  • DOCKER_TAG configured Docker tag (default is latest)
  • DOCKER_REGISTRY configures the Docker registry where the image will be pushed (default is docker.io)

Building everything

The make all command can be used to trigger all the tasks above - build the Java code, Docker image, tag it and push it to the configured repository.

make invokes Maven for packaging Java based applications. The mvn command can be customized by setting the MVN_ARGS environment variable when launching make all. For example, MVN_ARGS=-DskipTests make all can be used to avoid running the unit tests.

Building container images for other platforms with Docker buildx

Docker supports building images for different platforms using the docker buildx command. If you want to use it to build Strimzi images, you can just set the environment variable DOCKER_BUILDX to buildx, set the environment variable DOCKER_BUILD_ARGS to pass additional build options such as the platform and run the build. For example following can be used to build Strimzi images for Linux on PowerPC/ppc64le architecture:

export DOCKER_BUILDX=buildx
export DOCKER_BUILD_ARGS="--platform linux/ppc64le"
make all