sleighzy/keycloak repository overview

⁠Keycloak arm64 Docker Image

Keycloak do not provide Docker images for arm64 platforms, only linux/amd64 versions are available on Docker Hub, see jboss/keycloak⁠ for these. I am running a Raspberry Pi 64bit cluster and need a linux/arm64 image.

The sleighzy/keycloak⁠ images on Docker Hub have been built using the instructions below and provide the linux/arm64 support.

Clone the official GitHub repo keycloak/keycloak-containers⁠ to obtain the assets needed to build the container.

git clone https://github.com/keycloak/keycloak-containers.git
cd keycloak-containers/server

The Keycloak version in the master branch does not always match the most recent version of the official Keycloak image in Docker Hub. For example, 16.0.0 vs 16.1.0. Switch to the latest branch as the Dockerfile in that branch should match the version and Dockerfile in Docker Hub.

git checkout latest

⁠Build the image using Docker

The Docker commands below have been run on the Raspberry Pi itself as Docker will build the image for the platform that it is being run on, i.e. arm64 in this case. You can also use the new Docker Buildx that provides the means to build images for multiple architectures, see the Leverage multi-CPU architecture support⁠ Docker docs for more info. This was one approach I took initially when building this on my Mac laptop, I'll add some notes about this later.

docker build -t sleighzy/keycloak:16.1.0-arm64 .

Run the container to ensure that it starts up as expected and that it runs to completion and is accessible.

docker run \
  --rm \
  -p 8080:8080 \
  -e KEYCLOAK_USER=admin \
  -e KEYCLOAK_PASSWORD=password \
  sleighzy/keycloak:16.1.0-arm64

Tag the image as latest and push both tags to Docker Hub. Profit.

docker tag sleighzy/keycloak:16.1.0-arm64 sleighzy/keycloak:latest
docker push sleighzy/keycloak:16.1.0-arm64
docker push sleighzy/keycloak:latest

⁠Building the image with BuildKit for containerd

There is also another option for building images as well. My Raspberry Pi cluster is running the K3s⁠ Kubernetes distribution which runs on containerd⁠, hence Docker does not need to be installed on the Raspberry Pi. See my Building images with BuildKit for containerd⁠ notes for more information on this and using buildctl to build these.