circleci docker buildx example

config.yaml

# Use the latest 2.1 version of CircleCI pipeline process engine. See: https://circleci.com/docs/2.0/configuration-reference
version: 2.1

commands:

  configure-dockerhub:
    description: Configure Docker Hub access
    steps:
      - run:
          name: Configure Docker Hub
          command: |
            [ -z "$ACCESS_TOKEN" ] && exit 0
            docker login --username youraccountname --password=$ACCESS_TOKEN

  install-docker-buildx:
    description: Install Docker Buildx
    steps:
      - run:
          name: Install Docker Buildx
          command: |
            mkdir -vp ~/.docker/cli-plugins/
            curl --silent -L "https://github.com/docker/buildx/releases/download/v0.5.1/buildx-v0.5.1.linux-amd64" > ~/.docker/cli-plugins/docker-buildx
            chmod a+x ~/.docker/cli-plugins/docker-buildx
            docker buildx version
            sudo apt-get update && sudo apt-get install -y binfmt-support qemu-user-static
            docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
            docker run --privileged --rm tonistiigi/binfmt --install arm64
            docker context create buildcontext
            docker buildx create buildcontext --use


jobs:
  build-multiarch-container:
    parameters:
      resource_size:
        description: Resource agent size
        type: string
        default: medium
      repo:
        description: repository without tag, e.g. yourproject/foo
        type: string
      directory:
        description: Directory path without trailing slash relative to repo root
        type: string
    docker:
      - image: cimg/base:stable
    resource_class: << parameters.resource_size >>
    steps:
      - checkout
      - setup_remote_docker:
          version: 19.03.13
          docker_layer_caching: true
      - install-docker-buildx
      - configure-dockerhub
      - run:
          name: Build and push container
          working_directory: << parameters.directory >>
          no_output_timeout: 2h
          command: |
            export TAG=<< parameters.repo >>:`echo $CIRCLE_SHA1 | cut -c -7`
            docker buildx inspect --bootstrap
            docker buildx build --progress plain --push -t $TAG --platform linux/amd64,linux/arm64 .


workflows:
  version: 2
  build-images:
    jobs:
      - build-multiarch-container:
          name: build-python-base-arm64
          context:
            - dockerhub
            - models
          repo: your_dockerhub/your_image_name
          resource_size: xlarge #could be also medium depend on your project size
          directory: private/yourimage # the directory path that contain your Dockerfile
          filters:
            branches:
              only:
                - master