Add container image build workflow

.github/workflows/publish-docker.yml

@@ -0,0 +1,93 @@
+name: Build and Publish Docker Image
+
+on:
+  release:
+    types:
+    - published
+  push:
+    branches:
+    - master
+    tags:
+    - v*
+    paths-ignore:
+    - 'docs/**'
+    - '**/*.md'
+  pull_request:
+    types:
+    - labeled
+    paths-ignore:
+    - 'docs/**'
+    - '**/*.md'
+
+jobs:
+  buildAndPush:
+    permissions:
+      contents: read
+      packages: write
+    if: ${{ github.event.label.name == 'ok-to-image' }} || ${{ github.event.label.name == 'ok-to-🐳' }} || ${{ github.ref == 'refs/heads/main' }}
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: docker/metadata-action@v5
+      id: meta
+      with:
+        images: |
+          ghcr.io/${{ github.repository_owner }}/metalbond
+        tags: |
+          type=semver,pattern={{version}}
+          type=schedule
+          type=ref,event=branch
+          type=ref,event=tag
+          type=ref,event=pr
+          type=sha
+        flavor: |
+          latest=${{ github.ref == 'refs/heads/main' }}
+
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v3
+      with:
+        platforms: all
+    # workaround for self-hosted runner
+    # https://github.com/mumoshu/actions-runner-controller-ci/commit/e91c8c0f6ca82aa7618010c6d2f417aa46c4a4bf
+
+    - name: Set up Docker Context for Buildx
+      id: buildx-context
+      run: |
+        docker context create builders
+
+    - name: Set up Docker Buildx
+      timeout-minutes: 5
+      uses: docker/setup-buildx-action@v3
+      with:
+        version: latest
+        endpoint: builders # self-hosted
+
+    - name: Login to GHCR
+      if: github.event_name != 'pull_request'
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Determine version
+      id: vars
+      run: |
+        if [ "${{ github.ref }}" == "refs/heads/main" ]; then
+          METALBOND_VERSION=$(echo "${{ github.sha }}" | cut -c1-7)
+        else
+          METALBOND_VERSION=${GITHUB_REF##*/}
+        fi
+        echo "METALBOND_VERSION=$METALBOND_VERSION" >> $GITHUB_ENV
+
+    - name: Build and push
+      timeout-minutes: 40
+      uses: docker/build-push-action@v6
+      with:
+        context: .
+        build-args: |
+          METALBOND_VERSION=${{ env.METALBOND_VERSION }}
+        platforms: linux/amd64,linux/arm64
+        push: ${{ github.event_name != 'pull_request' }}
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -1,21 +1,40 @@
-FROM golang:1.22-bullseye AS builder
+FROM --platform=$BUILDPLATFORM golang:1.22-bullseye AS builder
+
+ARG DEBIAN_FRONTEND=noninteractive
+ARG GOARCH=''
 
 WORKDIR /workspace
+
+# Copy the Go Modules manifests
+COPY go.mod go.mod
+COPY go.sum go.sum
+
+# cache deps before building and copying source so that we don't need to re-download as much
+# and so that source changes don't invalidate our downloaded layer
+RUN --mount=type=cache,target=/root/.cache/go-build \
+    --mount=type=cache,target=/go/pkg \
+    go mod download
+
 COPY cmd cmd
 COPY html html
 COPY pb pb
 COPY .git .git
 COPY Makefile .
-COPY go.mod .
-COPY go.sum .
 COPY *.go ./
 
-RUN make amd64
+ARG TARGETOS
+ARG TARGETARCH
+
+# Build
+ARG METALBOND_VERSION
+RUN --mount=type=cache,target=/root/.cache/go-build \
+    --mount=type=cache,target=/go/pkg \
+    CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -buildvcs=false -ldflags "-X github.com/ironcore-dev/metalbond.METALBOND_VERSION=$METALBOND_VERSION" -o metalbond cmd/cmd.go
 
 FROM debian:bullseye-slim
 
 RUN apt-get update && apt-get install -y iproute2 ethtool wget adduser inetutils-ping && rm -rf /var/lib/apt/lists/*
-COPY --from=builder /workspace/target/metalbond_amd64 /usr/sbin/metalbond
-COPY --from=builder /workspace/target/html /usr/share/metalbond/html
+COPY --from=builder /workspace/metalbond /usr/sbin/metalbond
+COPY --from=builder /workspace/html /usr/share/metalbond/html
 
 RUN echo -e "254\tmetalbond" >> "/etc/iproute2/rt_protos"

cmd/cmd.go

@@ -43,7 +43,10 @@ var CLI struct {
 }
 
 func main() {
-	log.Infof("MetalBond %s", metalbond.METALBOND_VERSION)
+	if metalbond.METALBOND_VERSION == "" {
+		metalbond.METALBOND_VERSION = "development" // Fallback for when version is not set
+	}
+	log.Infof("MetalBond Version: %s", metalbond.METALBOND_VERSION)
 
 	go func() {
 		for {