release: add publish docker image step

.github/workflows/ci.yml

@@ -89,7 +89,7 @@ jobs:
           go build -v -ldflags="-X github.com/Azure/mcp-kubernetes/internal/version.GitCommit=$(git rev-parse HEAD) -X github.com/Azure/mcp-kubernetes/internal/version.BuildMetadata=$(date +%Y%m%d)" -o mcp-kubernetes ./cmd/mcp-kubernetes
 
       - name: Build Docker image
-        run: docker build -t mcp-kubernetes:test .
+        run: docker build -t mcp-kubernetes:test --build-arg VERSION=$(git describe --tags --always --dirty | cut -c2-),GIT_COMMIT=$(git rev-parse HEAD),BUILD_DATE=$(date +%Y%m%d),GIT_TREE_STATE=$(if git diff --quiet; then echo "clean"; else echo "dirty"; fi) .
 
       - name: Check Docker image
         run: |

.github/workflows/go-ossf-slsa3-publish.yml

@@ -11,15 +11,17 @@
 # The provenance file can be verified using https://github.com/slsa-framework/slsa-verifier.
 # For more information about SLSA and how it improves the supply-chain, visit slsa.dev.
 
-name: SLSA Go releaser
+name: SLSA releaser
 on:
   workflow_dispatch:
   push:
     tags:
       - "v*"
 
 permissions: read-all
-
+env:
+  IMAGE_REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
 jobs:
   # Generate ldflags dynamically.
   # Optional: only needed for ldflags.
@@ -66,3 +68,67 @@ jobs:
       #     Optional: For more options, see https://github.com/slsa-framework/slsa-github-generator#golang-projects
       # =============================================================================================================
 
+  build-image:
+    permissions:
+      contents: read
+      packages: write
+    needs: args
+    outputs:
+      image: ${{ steps.image.outputs.image }}
+      digest: ${{ steps.build.outputs.digest }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b # v2.3.4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@dc7b9719a96d48369863986a06765841d7ea23f6 # v2.0.0
+
+      - name: Authenticate Docker
+        uses: docker/login-action@49ed152c8eca782a232dede0303416e8f356c37b # v2.0.0
+        with:
+          registry: ${{ env.IMAGE_REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@69f6fc9d46f2f8bf0d5491e4aabe0bb8c6a4678a # v4.0.1
+        with:
+          images: ${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@e551b19e49efd4e98792db7592c17c09b89db8d8 # v3.0.0
+        id: build
+        with:
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            VERSION=${{ needs.args.outputs.version }}
+            GIT_COMMIT=${{ needs.args.outputs.commit }}
+            BUILD_DATE=${{ needs.args.outputs.commit-date }}
+            GIT_TREE_STATE=${{ needs.args.outputs.tree-state }}
+      - name: Output image
+        id: image
+        run: |
+          # NOTE: Set the image as an output because the `env` context is not
+          # available to the inputs of a reusable workflow call.
+          image_name=$(echo "${IMAGE_REGISTRY}/${IMAGE_NAME}"| tr '[:upper:]' '[:lower:]')
+          echo "image=$image_name" >> "$GITHUB_OUTPUT"
+  # This step calls the container workflow to generate provenance and push it to
+  # the container registry.
+  provenance:
+    needs: build-image
+    permissions:
+      actions: read # for detecting the Github Actions environment.
+      id-token: write # for creating OIDC tokens for signing.
+      packages: write # for uploading attestations.
+    uses: slsa-framework/slsa-github-generator/.github/workflows/generator_container_slsa3.yml@v2.1.0
+    with:
+      image: ${{ needs.build-image.outputs.image }}
+      digest: ${{ needs.build-image.outputs.digest }}
+      registry-username: ${{ github.actor }}
+      private-repository: true
+    secrets:
+      registry-password: ${{ secrets.GITHUB_TOKEN }}

Dockerfile

@@ -1,6 +1,9 @@
 # Build stage
 FROM golang:1.24-alpine AS builder
-
+ARG VERSION
+ARG GIT_COMMIT
+ARG BUILD_DATE
+ARG GIT_TREE_STATE
 # Set working directory
 WORKDIR /app
 
@@ -14,7 +17,7 @@ RUN go mod download
 COPY . .
 
 # Build the application
-RUN CGO_ENABLED=0 GOOS=linux go build -ldflags "-X github.com/Azure/mcp-kubernetes/internal/version.GitCommit=$(git rev-parse HEAD 2>/dev/null || echo 'unknown') -X github.com/Azure/mcp-kubernetes/internal/version.BuildMetadata=$(date +%Y%m%d)" -o mcp-kubernetes ./cmd/mcp-kubernetes
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags "-X github.com/Azure/mcp-kubernetes/internal/version.GitVersion=${VERSION} -X github.com/Azure/mcp-kubernetes/internal/version.GitCommit=${GIT_COMMIT} -X github.com/Azure/mcp-kubernetes/internal/version.BuildMetadata=${BUILD_DATE} -X github.com/Azure/mcp-kubernetes/internal/version.GitTreeState=${GIT_TREE_STATE}" -o mcp-kubernetes ./cmd/mcp-kubernetes
 
 # Runtime stage
 FROM alpine:3.19