ci: add docker image

.github/workflows/docker.yml

@@ -0,0 +1,80 @@
+name: Docker Builds
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - "main"
+    tags:
+      - "v*.*.*"
+
+permissions:
+  contents: read
+  packages: write
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      # Get the repositery's code
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Inject slug/short variables
+        uses: rlespinasse/github-slug-action@v4
+        with:
+          short-length: 8 # Same as v3 and before
+
+      # https://github.com/docker/setup-qemu-action
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+        with:
+          image: tonistiigi/binfmt:qemu-v8.1.5 # more recent
+
+      # https://github.com/docker/setup-buildx-action
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v3
+
+      #      - name: Available platforms
+      #        run: echo ${{ steps.buildx.outputs.platforms }}
+
+      - name: Login to GHCR
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      # - name: Login to Docker Hub
+      #   if: github.event_name != 'pull_request'
+      #   uses: docker/login-action@v3
+      #   with:
+      #     username: ${{ secrets.DOCKERHUB_USERNAME }}
+      #     password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Docker meta for PMS
+        id: meta_pms
+        uses: docker/metadata-action@v5
+        with:
+          # list of Docker images to use as base name for tags
+          images: |
+            ghcr.io/${{ github.repository }}
+          # generate Docker tags based on the following events/attributes
+          tags: |
+            type=schedule
+            type=ref,event=branch
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+      - name: Build and push PMS
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64 # works only on x86 systems and intel
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta_pms.outputs.tags }}
+          labels: ${{ steps.meta_pms.outputs.labels }}
+          build-args: |
+            BUILD_VERSION=${{ env.GITHUB_REF_SLUG }}

Dockerfile

@@ -2,6 +2,7 @@
 
 FROM golang:1.23 AS BUILD
 WORKDIR /app
+ARG BUILD_VERSION=dev
 
 # Download Go modules
 COPY go.mod go.sum ./
@@ -12,9 +13,9 @@ RUN go mod download
 COPY *.go ./
 
 # Build
-RUN CGO_ENABLED=0 GOOS=linux go build -o /turbostat-exporter
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-X 'main.Version=${BUILD_VERSION}'" -o /turbostat-exporter
 
-FROM debian:12.7-slim
+FROM debian:sid-slim
 
 RUN <<EOF
     apt update
@@ -23,3 +24,4 @@ RUN <<EOF
 EOF
 
 COPY --from=BUILD /turbostat-exporter /usr/bin/turbostat-exporter
+