buildspec-manifest.yml

version: 0.2
# based on the following AWS blog:
# https://aws.amazon.com/blogs/containers/introducing-multi-architecture-container-images-for-amazon-ecr/
# based on the following Docker documentation, must include the DOCKER_CLI_EXPERIMENTAL environment variable
# https://docs.docker.com/engine/reference/commandline/manifest/    
# based on the following AWS documentation:
# https://docs.aws.amazon.com/codebuild/latest/userguide/sample-docker.html
# https://docs.aws.amazon.com/AmazonECR/latest/userguide/docker-push-multi-architecture-image.html
# Verify the CodeBuild execution role can access ECR. 
# https://docs.aws.amazon.com/AmazonECR/latest/userguide/ecr_managed_policies.html
phases:
    install:
        commands:
            - yum update -y
    pre_build:
        commands:
            - echo Logging in to Amazon ECR...
            - $(aws ecr get-login --no-include-email --region $AWS_DEFAULT_REGION)
    build:
        commands:
            - echo Build started on `date`
            - echo Building the Docker manifest...   
            - export DOCKER_CLI_EXPERIMENTAL=enabled       
            - docker manifest create $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME:latest-arm64v8 $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME:latest-amd64	
            - docker manifest annotate --arch arm64 $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME:latest-arm64v8
            - docker manifest annotate --arch amd64 $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME:latest-amd64

    post_build:
        commands:
            - echo Build completed on `date`
            - echo Pushing the Docker image...
            - docker manifest push $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME
            - docker manifest inspect $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME