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docker: support pushing to multiple registries #16

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docker: support pushing to multiple registries #16

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30 changes: 25 additions & 5 deletions build-docker-images.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -53,19 +53,39 @@ fi
DOCKER_BUILD_DEFAULT_PLATFORMS='linux/amd64,linux/arm64'
DOCKER_BUILD_PLATFORMS=${DOCKER_BUILD_PLATFORMS:-$DOCKER_BUILD_DEFAULT_PLATFORMS}

# log in to Docker Hub _before_ building to avoid rate limits
docker login -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD"
# registry configuration
# space-separated list of registries to push to (defaults to Docker Hub if not set)
# for Docker Hub only: leave REGISTRIES unset or use "docker.io"
# for AWS ECR: export REGISTRIES="123456789012.dkr.ecr.us-east-1.amazonaws.com"
# for multiple: export REGISTRIES="docker.io 123456789012.dkr.ecr.us-east-1.amazonaws.com ghcr.io"
REGISTRIES="${REGISTRIES:-docker.io}"

# log in to all registries _before_ building to avoid rate limits
for registry in $REGISTRIES; do
if [[ "$registry" =~ docker\.io ]]; then
# Docker Hub login (requires: DOCKER_USERNAME, DOCKER_PASSWORD)
docker login -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD"
elif [[ "$registry" =~ \.ecr\. ]]; then
# AWS ECR login (requires: AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_REGION or use IAM roles)
aws ecr get-login-password --region $(echo "$registry" | cut -d'.' -f4) | docker login --username AWS --password-stdin "$registry"
elif [[ "$registry" =~ ghcr\.io ]]; then
# GitHub Container Registry login (requires: GITHUB_USERNAME, GITHUB_TOKEN)
echo "$GITHUB_TOKEN" | docker login ghcr.io -u "$GITHUB_USERNAME" --password-stdin
fi
done

# Build and push each tag (the built image will be reused after the first build)
for tag in ${tags[@]}; do
# legacy single-arch builds using `docker build` are suffixed `-classic`
# note: these are generated for backwards compatibility with older versions of
# docker & will be deprecated/removed at a later date, please upgrade docker.
docker build -t "$tag-classic" .
docker push "$tag-classic"
for registry in $REGISTRIES; do
docker build -t "$registry/$tag-classic" .
docker push "$registry/$tag-classic"
done

# newer multi-arch builds using `docker buildx`
docker buildx create --use --platform="$DOCKER_BUILD_PLATFORMS" --name 'multi-platform-builder'
docker buildx inspect --bootstrap
docker buildx build --push --platform="$DOCKER_BUILD_PLATFORMS" -t $tag .
docker buildx build --push --platform="$DOCKER_BUILD_PLATFORMS" $(for registry in $REGISTRIES; do echo "-t $registry/$tag"; done) .
done