Add multiarch building support

Signed-off-by: Bin Lu <[email protected]>

.travis.yml

@@ -4,4 +4,4 @@ services:
     - docker
 
 script:
-    - docker build -t quay.io/kubernetes_incubator/node-feature-discovery .
+    - make image

Dockerfile

@@ -1,12 +1,26 @@
+# Get qemu-user-static
+FROM alpine:3.9.2 as qemu
+RUN apk add --no-cache curl
+ARG QEMUVERSION=2.9.1
+ARG QEMUARCH
+
+SHELL ["/bin/ash", "-o", "pipefail", "-c"]
+
+RUN curl -fsSL https://github.com/multiarch/qemu-user-static/releases/download/v${QEMUVERSION}/qemu-${QEMUARCH}-static.tar.gz | tar zxvf - -C /usr/bin
+RUN chmod +x /usr/bin/qemu-*
+
 # Build node feature discovery
-FROM golang:1.10 as builder
+ARG IMAGEARCH
+FROM ${IMAGEARCH}golang:1.11-stretch as builder
+
+ARG QEMUARCH
+COPY --from=qemu /usr/bin/qemu-${QEMUARCH}-static /usr/bin/
 
 ADD . /go/src/sigs.k8s.io/node-feature-discovery
 
 WORKDIR /go/src/sigs.k8s.io/node-feature-discovery
 
 ARG NFD_VERSION
-
 RUN go get github.com/golang/dep/cmd/dep
 RUN dep ensure -v
 RUN go install \
@@ -16,9 +30,8 @@ RUN install -D -m644 nfd-worker.conf.example /etc/kubernetes/node-feature-discov
 
 RUN make test
 
-
 # Create production image for running node feature discovery
-FROM debian:stretch-slim
+FROM ${IMAGEARCH}debian:stretch-slim
 
 # Use more verbose logging of gRPC
 ENV GRPC_GO_LOG_SEVERITY_LEVEL="INFO"

Makefile

@@ -1,22 +1,59 @@
+ARCH    ?= amd64
+ALL_ARCH = amd64 arm arm64 ppc64le s390x
+
 .PHONY: all test
 
 IMAGE_BUILD_CMD := docker build
 
 VERSION := $(shell git describe --tags --dirty --always)
 
+IMAGEARCH ?=
+QEMUARCH ?= x86_64
+
+ifeq ($(ARCH),arm)
+        IMAGEARCH = arm32v7/
+        QEMUARCH = arm
+endif
+ifeq ($(ARCH),arm64)
+        IMAGEARCH = arm64v8/
+        QEMUARCH = aarch64
+endif
+ifeq ($(ARCH),ppc64le)
+        IMAGEARCH = ppc64le/
+        QEMUARCH = ppc64le
+endif
+ifeq ($(ARCH),s390x)
+        IMAGEARCH = s390x/
+        QEMUARCH = s390x
+endif
+
 IMAGE_REGISTRY := quay.io/kubernetes_incubator
 IMAGE_NAME := node-feature-discovery
 IMAGE_TAG_NAME := $(VERSION)
 IMAGE_REPO := $(IMAGE_REGISTRY)/$(IMAGE_NAME)
 IMAGE_TAG := $(IMAGE_REPO):$(IMAGE_TAG_NAME)
 
+ifneq ($(ARCH),amd64)
+	IMAGE_TAG = $(IMAGE_REPO)-$(ARCH):$(IMAGE_TAG_NAME)
+endif
 
 all: image
 
 image:
 	$(IMAGE_BUILD_CMD) --build-arg NFD_VERSION=$(VERSION) \
+		--build-arg IMAGEARCH=$(IMAGEARCH) \
+		--build-arg QEMUARCH=$(QEMUARCH) \
 		-t $(IMAGE_TAG) ./
 
+pre-cross:
+	docker run --rm --privileged multiarch/qemu-user-static:register --reset
+
+# Building multi-arch docker images
+images-all: pre-cross
+	for arch in $(ALL_ARCH); do \
+		$(MAKE) image ARCH=$$arch; \
+	done
+
 mock:
 	mockery --name=FeatureSource --dir=source --inpkg --note="Re-generate by running 'make mock'"
 	mockery --name=APIHelpers --dir=pkg/apihelper --inpkg --note="Re-generate by running 'make mock'"