Support Arm64 (#2)

* Support Arm64

Dockerfile

@@ -1,21 +1,25 @@
 FROM golang:1.16-buster as builder
 
+ARG LD_FLAGS
+ARG TARGETPLATFORM
+
 WORKDIR /app
 COPY . .
 
 RUN go get -d -v \
     && go install -v
 
-RUN make build
+RUN export GOOS=$(echo ${TARGETPLATFORM} | cut -d / -f1) && \
+    export GOARCH=$(echo ${TARGETPLATFORM} | cut -d / -f2)
 
-FROM alpine:latest
-LABEL MAINTAINER "Frank Jogeleit <frank.jogeleit@gweb.de>"
+RUN go env
 
-WORKDIR /app
+RUN CGO_ENABLED=0 go build -ldflags="${LD_FLAGS}" -o /app/build/kyverno-plugin -v
 
-RUN apk add --update --no-cache ca-certificates
+FROM scratch
+LABEL MAINTAINER "Frank Jogeleit <frank.jogeleit@gweb.de>"
 
-RUN addgroup -S kyverno-plugin && adduser -u 1234 -S kyverno-plugin -G kyverno-plugin
+WORKDIR /app
 
 USER 1234
 

Makefile

@@ -1,6 +1,8 @@
 GO ?= go
-
 BUILD ?= build
+REPO ?= fjogeleit/policy-reporter-kyverno-plugin
+IMAGE_TAG ?= 0.3.0
+LD_FLAGS="-s -w"
 
 all: build
 
@@ -23,3 +25,12 @@ coverage:
 .PHONY: build
 build: prepare
 	CGO_ENABLED=0 $(GO) build -v -ldflags="-s -w" $(GOFLAGS) -o $(BUILD)/kyverno-plugin .
+
+.PHONY: docker-build
+docker-build:
+	@docker buildx build --progress plane --platform linux/arm64,linux/amd64 --tag $(REPO):$(IMAGE_TAG) . --build-arg LD_FLAGS=$(LD_FLAGS)
+
+.PHONY: docker-push
+docker-push:
+	@docker buildx build --progress plane --platform linux/arm64,linux/amd64 --tag $(REPO):$(IMAGE_TAG) . --build-arg LD_FLAGS=$(LD_FLAGS) --push
+	@docker buildx build --progress plane --platform linux/arm64,linux/amd64 --tag $(REPO):latest . --build-arg LD_FLAGS=$(LD_FLAGS) --push