First implementation for arm images (kubernetes-sigs#1815)

* multiarch init

Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* change

Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* codespaces

Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* add amd64 arch

* changes

Signed-off-by: GitHub <noreply@github.com>

* test

Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* changes

* ch-changes

Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* do not install certs

Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* save

Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* try amd64

Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* amd64

Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* remove devcontainer

Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* tests

Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* changes

Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* Update Makefile

Co-authored-by: Nick Jüttner <nick@juni.io>

* Update Makefile

Co-authored-by: Nick Jüttner <nick@juni.io>

* Update Makefile

Co-authored-by: Nick Jüttner <nick@juni.io>

Co-authored-by: Nick Jüttner <nick@juni.io>

Dockerfile

@@ -13,22 +13,19 @@
 # limitations under the License.
 
 # builder image
+ARG ARCH
 FROM golang:1.14 as builder
+ARG ARCH
 
 WORKDIR /sigs.k8s.io/external-dns
 
 COPY . .
-RUN go mod vendor && \
-    make test && \
-    make build
+RUN make test && make build.$ARCH
 
 # final image
-FROM alpine:3.12
-LABEL maintainer="Team Teapot @ Zalando SE <team-teapot@zalando.de>"
-
-RUN apk add --update --no-cache ca-certificates && \
-    update-ca-certificates
+FROM $ARCH/alpine:3.12
 
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
 COPY --from=builder /sigs.k8s.io/external-dns/build/external-dns /bin/external-dns
 
 # Run as UID for nobody since k8s pod securityContext runAsNonRoot can't resolve the user ID:

Makefile

@@ -68,17 +68,40 @@ IMAGE         ?= us.gcr.io/k8s-artifacts-prod/external-dns/$(BINARY)
 VERSION       ?= $(shell git describe --tags --always --dirty)
 BUILD_FLAGS   ?= -v
 LDFLAGS       ?= -X sigs.k8s.io/external-dns/pkg/apis/externaldns.Version=$(VERSION) -w -s
+ARCHS         = arm64v8 amd64
+SHELL         = /bin/bash
+
 
 build: build/$(BINARY)
 
 build/$(BINARY): $(SOURCES)
 	CGO_ENABLED=0 go build -o build/$(BINARY) $(BUILD_FLAGS) -ldflags "$(LDFLAGS)" .
 
+build.push/multiarch:
+	arch_specific_tags=()
+	for arch in $(ARCHS); do \
+		image="$(IMAGE):$(VERSION)-$${arch}" ;\
+		DOCKER_BUILDKIT=1 docker build --rm --tag $${image} --build-arg VERSION="$(VERSION)" --build-arg ARCH="$${arch}" . ;\
+		docker push $${image} ;\
+		arch_specific_tags+=( "--amend $${image}" ) ;\
+	done ;\
+	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest create "$(IMAGE):$(VERSION)" $${arch_specific_tags[@]} ;\
+	for arch in $(ARCHS); do \
+		DOCKER_CLI_EXPERIMENTAL=enabled docker manifest annotate --arch $${arch} "$(IMAGE):$(VERSION)" "$(IMAGE):$(VERSION)-$${arch}" ;\
+	done;\
+	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest push "$(IMAGE):$(VERSION)" \
+
 build.push: build.docker
 	docker push "$(IMAGE):$(VERSION)"
 
+build.arm64v8:
+	CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o build/$(BINARY) $(BUILD_FLAGS) -ldflags "$(LDFLAGS)" .
+
+build.amd64:
+	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o build/$(BINARY) $(BUILD_FLAGS) -ldflags "$(LDFLAGS)" .
+
 build.docker:
-	docker build --rm --tag "$(IMAGE):$(VERSION)" --build-arg VERSION="$(VERSION)" .
+	docker build --rm --tag "$(IMAGE):$(VERSION)" --build-arg VERSION="$(VERSION)" --build-arg ARCH="amd64" .
 
 build.mini:
 	docker build --rm --tag "$(IMAGE):$(VERSION)-mini" --build-arg VERSION="$(VERSION)" -f Dockerfile.mini .
@@ -90,7 +113,7 @@ clean:
 .PHONY: release.staging
 
 release.staging:
-	IMAGE=$(IMAGE_STAGING) $(MAKE) build.docker build.push
+	IMAGE=$(IMAGE_STAGING) $(MAKE) build.push/multiarch
 
 release.prod:
-	$(MAKE) build.docker build.push
+	$(MAKE) build.push/multiarch