multiarch docker build

Makefile

@@ -149,3 +149,7 @@ test-docs: build-docs
 serve-docs: build-docs
 	@echo Stating docs website on http://localhost:${DOCS_PORT}/_build/html/index.html
 	@docker run -i -p ${DOCS_PORT}:8000 -e USER_ID=$$UID flux-docs
+
+.PHONY: build.image.multiarch
+build.image.multiarch:
+	docker buildx build --platform linux/amd64,linux/arm64,linux/arm/v7 -t zlangbert/flux-helm-operator:latest-multiarch -f docker/Dockerfile.build . --push

docker/Dockerfile.build

@@ -0,0 +1,65 @@
+# builder image
+#
+FROM --platform=$BUILDPLATFORM golang:1.13.5-buster as builder
+
+ARG BUILDPLATFORM
+ARG TARGETPLATFORM
+ARG TARGETARCH
+RUN echo "I am running on $BUILDPLATFORM, building for $TARGETPLATFORM"
+
+WORKDIR /workspace
+COPY . .
+
+RUN make ARCH=$TARGETARCH build/kubectl build/helm3 build/helm-operator
+
+# build final image
+#
+FROM alpine:3.10
+
+WORKDIR /home/flux
+
+RUN apk add --no-cache openssh-client ca-certificates tini 'git>=2.12.0' socat
+
+# Add git hosts to known hosts file so we can use
+# StrickHostKeyChecking with git+ssh
+ADD ./docker/known_hosts.sh /home/flux/known_hosts.sh
+RUN sh /home/flux/known_hosts.sh /etc/ssh/ssh_known_hosts && \
+    rm /home/flux/known_hosts.sh
+
+# Add default SSH config, which points at the private key we'll mount
+COPY ./docker/ssh_config /etc/ssh/ssh_config
+
+COPY --from=builder /workspace/build/kubectl /usr/local/bin/
+# The Helm client is included as a convenience for troubleshooting
+COPY --from=builder /workspace/build/helm3 /usr/local/bin/
+
+# These are pretty static
+LABEL maintainer="Flux CD <https://github.com/fluxcd/helm-operator/issues>" \
+      org.opencontainers.image.title="flux-helm-operator" \
+      org.opencontainers.image.description="The Helm operator for Kubernetes" \
+      org.opencontainers.image.url="https://github.com/fluxcd/helm-operator" \
+      org.opencontainers.image.source="[email protected]:fluxcd/helm-operator" \
+      org.opencontainers.image.vendor="Flux CD" \
+      org.label-schema.schema-version="1.0" \
+      org.label-schema.name="flux-helm-operator" \
+      org.label-schema.description="The Helm operator for Kubernetes" \
+      org.label-schema.url="https://github.com/fluxcd/helm-operator" \
+      org.label-schema.vcs-url="[email protected]:fluxcd/helm-operator" \
+      org.label-schema.vendor="Flux CD"
+
+ENTRYPOINT [ "/sbin/tini", "--", "helm-operator" ]
+
+ENV HELM_HOME=/var/fluxd/helm
+COPY ./docker/helm-repositories.yaml /var/fluxd/helm/repository/repositories.yaml
+RUN mkdir -p /var/fluxd/helm/repository/cache/
+
+COPY --from=builder /workspace/build/helm-operator /usr/local/bin/
+
+ARG BUILD_DATE
+ARG VCS_REF
+
+# These will change for every build
+LABEL org.opencontainers.image.revision="$VCS_REF" \
+      org.opencontainers.image.created="$BUILD_DATE" \
+      org.label-schema.vcs-ref="$VCS_REF" \
+      org.label-schema.build-date="$BUILD_DATE"