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cloud build: initial set of shared files

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The approach taken here extends the existing support for
cross-compiling binaries on the build host and specifying the Go
compiler: Go is installed if needed (as in Prow testing), binaries are
build on the host, then one image is created for each platform, and
finally those are combined into a single multi-architecture image.
This commit is contained in:
Patrick Ohly
2020-05-28 10:22:20 +02:00
parent 9084fecb84
commit bd416901d4
4 changed files with 127 additions and 0 deletions
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63
build.make
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@@ -105,6 +105,69 @@ build: $(CMDS:%=build-%)
container: $(CMDS:%=container-%)
push: $(CMDS:%=push-%)
# Additional parameters are needed when pushing to a local registry,
# see https://github.com/docker/buildx/issues/94.
# However, that then runs into https://github.com/docker/cli/issues/2396.
#
# What works for local testing is:
# make push-multiarch PULL_BASE_REF=master REGISTRY_NAME=<your account on dockerhub.io> BUILD_PLATFORMS="linux amd64; windows amd64 .exe; linux ppc64le -ppc64le; linux s390x -s390x"
DOCKER_BUILDX_CREATE_ARGS ?=
# This target builds a multiarch image for one command using Moby BuildKit builder toolkit.
# Docker Buildx is included in Docker 19.03.
#
# ./cmd/<command>/Dockerfile[.Windows] is used if found, otherwise Dockerfile[.Windows].
# BUILD_PLATFORMS determines which individual images are included in the multiarch image.
# PULL_BASE_REF must be set to 'master', 'release-x.y', or a tag name, and determines
# the tag for the resulting multiarch image.
push-multiarch-%: check-pull-base-ref build-%
set -ex; \
DOCKER_CLI_EXPERIMENTAL=enabled; \
export DOCKER_CLI_EXPERIMENTAL; \
docker buildx create $(DOCKER_BUILDX_CREATE_ARGS) --use --name multiarchimage-buildertest; \
trap "docker buildx rm multiarchimage-buildertest" EXIT; \
dockerfile_linux=$$(if [ -e ./cmd/$*/Dockerfile ]; then echo ./cmd/$*/Dockerfile; else echo Dockerfile; fi); \
dockerfile_windows=$$(if [ -e ./cmd/$*/Dockerfile.Windows ]; then echo ./cmd/$*/Dockerfile.Windows; else echo Dockerfile.Windows; fi); \
if [ '$(BUILD_PLATFORMS)' ]; then build_platforms='$(BUILD_PLATFORMS)'; else build_platforms="linux amd64"; fi; \
pushMultiArch () { \
tag=$$1; \
echo "$$build_platforms" | tr ';' '\n' | while read -r os arch suffix; do \
docker buildx build --push \
--tag $(IMAGE_NAME):$$arch-$$os-$$tag \
--platform=$$os/$$arch \
--file $$(eval echo \$${dockerfile_$$os}) \
--build-arg binary=./bin/$*$$suffix \
--label revision=$(REV) \
.; \
done; \
images=$$(echo "$$build_platforms" | tr ';' '\n' | while read -r os arch suffix; do echo $(IMAGE_NAME):$$arch-$$os-$$tag; done); \
docker manifest create --amend $(IMAGE_NAME):$$tag $$images; \
docker manifest push -p $(IMAGE_NAME):$$tag; \
}; \
if [ $(PULL_BASE_REF) = "master" ]; then \
: "creating or overwriting canary image"; \
pushMultiArch canary; \
elif echo $(PULL_BASE_REF) | grep -q -e 'release-*' ; then \
: "creating or overwriting canary image for release branch"; \
release_canary_tag=$$(echo $(PULL_BASE_REF) | cut -f2 -d '-')-canary; \
pushMultiArch $$release_canary_tag; \
elif docker pull $(IMAGE_NAME):$(PULL_BASE_REF) 2>&1 | tee /dev/stderr | grep -q "manifest for $(IMAGE_NAME):$(PULL_BASE_REF) not found"; then \
: "creating release image"; \
pushMultiArch $(PULL_BASE_REF); \
else \
: "ERROR: release image $(IMAGE_NAME):$(PULL_BASE_REF) already exists: a new tag is required!"; \
exit 1; \
fi
.PHONY: check-pull-base-ref
check-pull-base-ref:
if ! [ "$(PULL_BASE_REF)" ]; then \
echo >&2 "ERROR: PULL_BASE_REF must be set to 'master', 'release-x.y', or a tag name."; \
exit 1; \
fi
push-multiarch: $(CMDS:%=push-multiarch-%)
clean:
-rm -rf bin