feat: linux/arm64 compatibility

Fixes: #283

Signed-off-by: Robin Breathe <[email protected]>
Signed-off-by: Brady Siegel <[email protected]>

.github/workflows/on-push-to-main-branch.yml

@@ -43,6 +43,7 @@ jobs:
         build-args: |
           pkg_version=${{ env.PLUGIN_VERSION }}
         context: .
+        platforms: linux/amd64,linux/arm64
         tags: |
           ${{ env.TAG_BASE }}:latest
           ${{ env.TAG_BASE }}:${{ env.PLUGIN_VERSION }}

.github/workflows/on-release.yml

@@ -44,6 +44,7 @@ jobs:
           build-args: |
             pkg_version=${{ steps.tag.outputs.tag }}
           context: .
+          platforms: linux/amd64,linux/arm64
           tags: |
             ${{ env.TAG_BASE }}:latest
             ${{ env.TAG_BASE }}:${{steps.tag.outputs.tag}}

Dockerfile

@@ -1,9 +1,9 @@
 # Build the manager binary
-FROM golang:1.22 as builder
+FROM --platform=${BUILDPLATFORM} golang:1.22 as builder
 WORKDIR /workspace
 
-ARG TARGETARCH=amd64
-ARG TARGETOS=linux
+ARG TARGETARCH
+ARG TARGETOS
 
 ENV GOPROXY=direct
 # Copy the Go Modules manifests
@@ -18,8 +18,8 @@ COPY main.go main.go
 COPY pkg/ pkg/
 
 ENV CGO_ENABLED=0
-ENV GOOS=$TARGETOS
-ENV GOARCH=$TARGETARCH
+ENV GOOS=${TARGETOS:-linux}
+ENV GOARCH=${TARGETARCH:-amd64}
 ENV GO111MODULE=on
 
 # Do an initial compilation before setting the version so that there is less to
@@ -38,7 +38,7 @@ RUN VERSION=$pkg_version && \
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details
-FROM gcr.io/distroless/static:nonroot
+FROM --platform=${TARGETPLATFORM:-linux/amd64} gcr.io/distroless/static:nonroot
 LABEL org.opencontainers.image.authors="Jochen Ullrich <[email protected]>"
 LABEL org.opencontainers.image.source=https://github.com/cert-manager/aws-privateca-issuer
 WORKDIR /

Makefile

@@ -145,6 +145,7 @@ docker-build: test
 		--build-arg pkg_version=${VERSION} \
 		--tag ${IMG} \
 		--file Dockerfile \
+		--platform=linux/amd64,linux/arm64 \
 		${CURDIR}
 
 # Push the docker image