support image multiarch (#60)

Dockerfile

@@ -1,5 +1,7 @@
-FROM centos:7.6.1810
+FROM alpine:3.18.2
 
-COPY nebula-stats-exporter /
-RUN chmod +x /nebula-stats-exporter
+ARG TARGETPLATFORM
+ARG TARGETARCH
+
+COPY bin/${TARGETPLATFORM}/nebula-stats-exporter /
 ENTRYPOINT  [ "/nebula-stats-exporter" ]

Makefile

@@ -1,37 +1,61 @@
 PROJECT="nebula-exporter"
 
 GO ?= go
-VERSION ?= v3.3.0
-DockerUser=vesoft
+IMAGE_TAG ?= v3.3.0
+DOCKER_REPO=vesoft
 
+export GO111MODULE := on
+LDFLAGS = $(if $(DEBUGGER),,-s -w)
+GOOS := $(if $(GOOS),$(GOOS),linux)
+GOARCH := $(if $(GOARCH),$(GOARCH),amd64)
+GOENV  := GO15VENDOREXPERIMENT="1" CGO_ENABLED=0 GOOS=$(GOOS) GOARCH=$(GOARCH)
+GO     := $(GOENV) go
+GO_BUILD := $(GO) build -trimpath
+TARGETDIR := "$(GOOS)/$(GOARCH)"
+# Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set)
 ifeq (,$(shell go env GOBIN))
 GOBIN=$(shell go env GOPATH)/bin
 else
 GOBIN=$(shell go env GOBIN)
 endif
 
-all: check build docker-build docker-push clean
+PLATFORMS = arm64 amd64
+BUILDX_PLATFORMS = linux/arm64,linux/amd64
+
+ifeq (,$(shell go env GOBIN))
+GOBIN=$(shell go env GOPATH)/bin
+else
+GOBIN=$(shell go env GOBIN)
+endif
+
+all: check build-exporter helm-chart image-multiarch clean
 
 check: fmt vet lint
 
-build:
-	go build -o nebula-stats-exporter main.go
+build-exporter:
+	$(GO_BUILD) -ldflags '$(LDFLAGS)' -o bin/$(TARGETDIR)/nebula-stats-exporter main.go
 
-build-helm:
+helm-chart:
 	helm repo index charts --url https://vesoft-inc.github.io/nebula-stats-exporter/charts
 	helm package charts/nebula-exporter
 	mv nebula-exporter-*.tgz charts/
 
-docker-build:
-	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o nebula-stats-exporter main.go
-	docker build -t $(DockerUser)/nebula-stats-exporter:$(VERSION) .
-
-docker-push:
-	docker push $(DockerUser)/nebula-stats-exporter:$(VERSION)
+image-multiarch:
+	$(foreach PLATFORM,$(PLATFORMS), echo -n "$(PLATFORM)..."; GOARCH=$(PLATFORM) make build-exporter;)
+	echo "Building and pushing nebula-exporter image... $(BUILDX_PLATFORMS)"
+	docker buildx rm exporter || true
+	docker buildx create --driver-opt network=host --use --name=exporter
+	docker buildx build \
+			--no-cache \
+			--pull \
+			--push \
+			--progress plain \
+			--platform $(BUILDX_PLATFORMS) \
+			-t "${DOCKER_REPO}/nebula-stats-exporter:${IMAGE_TAG}" .
 
 clean:
 	rm -rf nebula-stats-exporter
-	docker rmi -f $(DockerUser)/nebula-stats-exporter:$(VERSION)
+	docker rmi -f $(DOCKER_REPO)/nebula-stats-exporter:$(IMAGE_TAG)
 
 fmt:
 	go fmt .