Add Dockerfile and CI

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the
+    # default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "daily"
+    commit-message:
+      # Prefix all commit messages with "[gha] "
+      prefix: "[gha] "
+
+  - package-ecosystem: "docker"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    commit-message:
+      # Prefix all commit messages with "[docker] "
+      prefix: "[docker] "

.github/workflows/ci.yml

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+name: ci
+
+on:
+  push:
+    branches: [ "master" ]
+    # Publish pep440 tags as releases.
+    tags: [ '*.*.*' ]
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  prepare:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Convert repository name to lowercase
+        id: set-variables
+        run: |
+          echo "image=${{ env.REGISTRY }}/${IMAGE_NAME,,}" >>${GITHUB_OUTPUT}
+          # Only enable push on push events (already covered above, but this is a safeguard)
+          echo "push=${{ github.event_name != 'pull_request' }}" >>${GITHUB_OUTPUT}
+
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ steps.set-variables.outputs.image }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=pep440,pattern={{version}}
+            type=pep440,pattern={{major}}
+            type=pep440,pattern={{major}}.{{minor}}
+    outputs:
+      image: ${{ steps.set-variables.outputs.image }}
+      push: ${{ steps.set-variables.outputs.push }}
+      meta-json: ${{ steps.meta.outputs.json }}
+      meta-labels: ${{ steps.meta.outputs.labels }}
+      meta-version: ${{ steps.meta.outputs.version }}
+
+  build:
+    needs:
+      - prepare
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    strategy:
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm/v6
+          - linux/arm/v7
+          - linux/arm64
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        if: matrix.platform != 'linux/amd64'
+        uses: docker/setup-qemu-action@v3
+
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: needs.prepare.outputs.push == 'true'
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Build and push the Docker image with Buildx (don't tag it yet)
+      # https://github.com/docker/build-push-action
+      - name: Build and push Docker image by digest
+        id: build
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          platforms: ${{ matrix.platform }}
+          build-args: |
+            GIT_REPOSITORY=${{ github.repository }}
+            "SSH_DEPLOY_KEY=${{ secrets.DOCKER_DEPLOY_KEY }}"
+          outputs: type=image,name=${{ needs.prepare.outputs.image }},push-by-digest=true,name-canonical=true,push=${{ needs.prepare.outputs.push }}
+          labels: ${{ needs.prepare.outputs.meta-labels }}
+
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        if: needs.prepare.outputs.push == 'true'
+        uses: actions/upload-artifact@v3
+        with:
+          name: digests
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  push:
+    needs:
+      - prepare
+      - build
+    if: needs.prepare.outputs.push == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v3
+        with:
+          name: digests
+          path: /tmp/digests
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      # Login against a Docker registry except on PR
+      # https://github.com/docker/login-action
+
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: needs.prepare.outputs.push == 'true'
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create manifest list and push
+        if: needs.prepare.outputs.push == 'true'
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create $(jq -r '"-t " + (.tags | join(" -t "))' <<< '${{ needs.prepare.outputs.meta-json }}') \
+            $(printf '${{ needs.prepare.outputs.image }}@sha256:%s ' *)
+
+      - name: Inspect image
+        if: needs.prepare.outputs.push == 'true'
+        run: |
+          docker buildx imagetools inspect '${{ needs.prepare.outputs.image }}:${{ needs.prepare.outputs.meta-version }}'

Dockerfile

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+ARG SSACLI_VERSION=6.15-11.0
+
+FROM golang:1.21.1-bookworm as builder
+
+ARG GIT_REPOSITORY
+ARG SSH_DEPLOY_KEY
+
+RUN \
+  apt-get update && \
+  apt-get upgrade -y && \
+  wget https://downloads.linux.hpe.com/SDR/repo/mcp/Debian/pool/non-free/ssacli-${SSACLI_VERSION}_amd64.deb && \
+  mkdir /root/.ssh/ && \
+  echo "${SSH_DEPLOY_KEY}" > /root/.ssh/id_rsa && \
+  chmod 600 /root/.ssh/id_rsa && \
+  ssh-keyscan github.com >> /root/.ssh/known_hosts && \
+  git clone git@github.com:${GIT_REPOSITORY}.git app && \
+  cd app && \
+  go mod init smartctl_ssacli_exporter && \
+  go get && \
+  go build -o smartctl_ssacli_exporter
+
+FROM debian:12.1-slim
+LABEL maintainer="Patrick Baus <patrick.baus@physik.tu-darmstadt.de>"
+ARG SSACLI_VERSION
+
+COPY --from=builder /go/app/smartctl_ssacli_exporter /sbin/smartctl_ssacli_exporter
+COPY --from=builder /go/ssacli-${SSACLI_VERSION}_amd64.deb /
+
+# Upgrade installed packages
+RUN apt-get update && \
+  apt-get upgrade -y && \
+  apt-get install -y --no-install-recommends  \
+    smartmontools \
+    procps && \
+  dpkg -i ssacli-${SSACLI_VERSION}_amd64.deb && \
+  apt-get clean && \
+  rm -rf /var/lib/apt/lists/* && \
+  rm ssacli-${SSACLI_VERSION}_amd64.deb
+
+ENTRYPOINT ["/sbin/smartctl_ssacli_exporter"]