Enable multi-arch Docker build

Signed-off-by: Marco Franssen <[email protected]>

Author: marcofranssen

.github/workflows/images.yaml

@@ -25,6 +25,9 @@ jobs:
     strategy:
       matrix:
         include:
+          - name: cilium-cli
+            dockerfile: ./Dockerfile
+            platforms: linux/amd64,linux/arm64
           - name: cilium-cli-ci
             dockerfile: ./Dockerfile
             platforms: linux/amd64
@@ -57,10 +60,10 @@ jobs:
           ref: ${{ steps.tag.outputs.tag }}
 
       # main branch or tag pushes
-      - name: CI Build ${{ matrix.name }}
+      - name: Build ${{ matrix.name }}
         if: ${{ github.event_name != 'pull_request_target' }}
         uses: docker/build-push-action@48aba3b46d1b1fec4febb7c5d0c644b249a11355 # v6.10.0
-        id: docker_build_ci_main
+        id: docker_build_main
         with:
           context: .
           file: ${{ matrix.dockerfile }}
@@ -71,19 +74,19 @@ jobs:
             quay.io/${{ github.repository_owner }}/${{ matrix.name }}:latest
             quay.io/${{ github.repository_owner }}/${{ matrix.name }}:${{ steps.tag.outputs.tag }}
 
-      - name: CI Image Releases digests
+      - name: Image Releases digests
         if: ${{ github.event_name != 'pull_request_target' }}
         shell: bash
         run: |
           mkdir -p image-digest/
-          echo "quay.io/${{ github.repository_owner }}/${{ matrix.name }}:latest@${{ steps.docker_build_ci_main.outputs.digest }}" > image-digest/${{ matrix.name }}.txt
-          echo "quay.io/${{ github.repository_owner }}/${{ matrix.name }}:${{ steps.tag.outputs.tag }}@${{ steps.docker_build_ci_main.outputs.digest }}" >> image-digest/${{ matrix.name }}.txt
+          echo "quay.io/${{ github.repository_owner }}/${{ matrix.name }}:latest@${{ steps.docker_build_main.outputs.digest }}" > image-digest/${{ matrix.name }}.txt
+          echo "quay.io/${{ github.repository_owner }}/${{ matrix.name }}:${{ steps.tag.outputs.tag }}@${{ steps.docker_build_main.outputs.digest }}" >> image-digest/${{ matrix.name }}.txt
 
       # PR updates
-      - name: CI Build ${{ matrix.name }}
+      - name: Build ${{ matrix.name }}
         if: ${{ github.event_name == 'pull_request_target' }}
         uses: docker/build-push-action@48aba3b46d1b1fec4febb7c5d0c644b249a11355 # v6.10.0
-        id: docker_build_ci_pr
+        id: docker_build_pr
         with:
           context: .
           file: ${{ matrix.dockerfile }}
@@ -93,12 +96,12 @@ jobs:
           tags: |
             quay.io/${{ github.repository_owner }}/${{ matrix.name }}:${{ steps.tag.outputs.tag }}
 
-      - name: CI Image Releases digests
+      - name: Image Releases digests
         if: ${{ github.event_name == 'pull_request_target' }}
         shell: bash
         run: |
           mkdir -p image-digest/
-          echo "quay.io/${{ github.repository_owner }}/${{ matrix.name }}:${{ steps.tag.outputs.tag }}@${{ steps.docker_build_ci_pr.outputs.digest }}" > image-digest/${{ matrix.name }}.txt
+          echo "quay.io/${{ github.repository_owner }}/${{ matrix.name }}:${{ steps.tag.outputs.tag }}@${{ steps.docker_build_pr.outputs.digest }}" > image-digest/${{ matrix.name }}.txt
 
       # Upload artifact digests
       - name: Upload artifact digests

Dockerfile

@@ -3,26 +3,41 @@
 # Copyright Authors of Cilium
 # SPDX-License-Identifier: Apache-2.0
 
-FROM docker.io/library/golang:1.23.3-alpine3.19@sha256:f72297ec1cf35152ecfe7a4d692825fc608fea8f3d3fa8f986fda70184082823 AS builder
+FROM --platform=${BUILDPLATFORM} docker.io/library/golang:1.23.3-alpine3.19@sha256:f72297ec1cf35152ecfe7a4d692825fc608fea8f3d3fa8f986fda70184082823 AS base
+RUN apk add --no-cache --update ca-certificates git make 
 WORKDIR /go/src/github.com/cilium/cilium-cli
-RUN apk add --no-cache curl git make ca-certificates
+COPY go.* .
+RUN --mount=type=cache,target=/go/pkg/mod go mod download
 COPY . .
-RUN make
+
+# xx is a helper for cross-compilation
+FROM --platform=$BUILDPLATFORM tonistiigi/xx:1.5.0@sha256:0c6a569797744e45955f39d4f7538ac344bfb7ebf0a54006a0a4297b153ccf0f AS xx
+
+FROM --platform=${BUILDPLATFORM} base AS builder
+ARG TARGETPLATFORM
+ARG TARGETARCH
+COPY --link --from=xx / /
+RUN --mount=type=cache,target=/root/.cache/go-build \
+    --mount=type=cache,target=/go/pkg/mod \
+    xx-go --wrap && \
+    make && \
+    xx-verify --static /go/src/github.com/cilium/cilium-cli/cilium
 
 # cilium-cli is from scratch only including cilium binaries
-FROM scratch AS cilium-cli
-ENTRYPOINT ["cilium"]
+FROM --platform=${BUILDPLATFORM} scratch AS cilium-cli
+ENTRYPOINT [""]
+USER 1000:1000
 LABEL maintainer="[email protected]"
 WORKDIR /root/app
-COPY --from=builder --chown=root:root --chmod=755 /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
-COPY --from=builder /go/src/github.com/cilium/cilium-cli/cilium /usr/local/bin/cilium
+COPY --link --from=builder --chown=root:root --chmod=755 /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --link --from=builder --chown=1000:1000 --chmod=755 /go/src/github.com/cilium/cilium-cli/cilium /usr/local/bin/cilium
 
 # cilium-cli-ci is based on ubuntu with cloud CLIs
 FROM ubuntu:24.04@sha256:278628f08d4979fb9af9ead44277dbc9c92c2465922310916ad0c46ec9999295 AS cilium-cli-ci
 ENTRYPOINT []
 LABEL maintainer="[email protected]"
 WORKDIR /root/app
-COPY --from=builder /go/src/github.com/cilium/cilium-cli/cilium /usr/local/bin/cilium
+COPY --link --from=builder /go/src/github.com/cilium/cilium-cli/cilium /usr/local/bin/cilium
 
 # Install cloud CLIs. Based on these instructions:
 # - https://cloud.google.com/sdk/docs/install#deb