docker-publish.yml

name: Docker

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

env:
  # Use docker.io for Docker Hub if empty
  REGISTRY: ghcr.io
  # github.repository as <account>/<repo>
  IMAGE_NAME: ${{ github.repository }}
  IMAGE_TAG: ${{ github.head_ref || github.ref_name }}-${{ github.sha }}

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      # This is used to complete the identity challenge
      # with sigstore/fulcio when running outside of PRs.
      id-token: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      # Install the cosign tool except on PR
      # https://github.com/sigstore/cosign-installer
      - name: Install cosign
        if: github.event_name != 'pull_request'
        uses: sigstore/cosign-installer@59acb6260d9c0ba8f4a2f9d9b48431a222b68e20 #v3.5.0
        with:
          cosign-release: 'v2.2.4'

      # Set up BuildKit Docker container builder to be able to build
      # multi-platform images and export cache
      # https://github.com/docker/setup-buildx-action
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0

      # Login against a Docker registry except on PR
      # https://github.com/docker/login-action
      - name: Log into registry ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request'
        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Extract metadata (tags, labels) for Docker
      # https://github.com/docker/metadata-action
      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@96383f45573cb7f253c731d3b3ab81c87ef81934 # v5.0.0
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: ${{ env.IMAGE_TAG }}

      # Build and push Docker image with Buildx (don't push on PR)
      # https://github.com/docker/build-push-action
      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 # v5.0.0
        with:
          platforms: linux/amd64,linux/arm64
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ env.IMAGE_TAG }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

      # Sign the resulting Docker image digest except on PRs.
      # This will only write to the public Rekor transparency log when the Docker
      # repository is public to avoid leaking data.  If you would like to publish
      # transparency data even for private images, pass --force to cosign below.
      # https://github.com/sigstore/cosign
      - name: Sign the published Docker image
        if: ${{ github.event_name != 'pull_request' }}
        env:
          # https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
          TAGS: ${{ env.IMAGE_TAG }}
          DIGEST: ${{ steps.build-and-push.outputs.digest }}
        # This step uses the identity token to provision an ephemeral certificate
        # against the sigstore community Fulcio instance.
        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}

  deploy-on-kind:
    runs-on: ubuntu-latest
    needs: build
    steps:
    - name: Checkout Code
      uses: actions/checkout@v4
    - name: set label
      run: |
        find . -type f -name "infrastructure/*.yaml" -exec sed -i "s/VERSION_LABEL_DEFAULT/${{ env.IMAGE_TAG }}/g" {} + 
        cat infrastructure/kustomization.yaml

    - uses: stefanzweifel/git-auto-commit-action@v5

    - name: Install kind
      uses: helm/kind-action@v1
      with:
        cluster_name: flux-cluster

    - name: Verify kubectl is installed
      run: kubectl version --client

    - name: Install Flux CLI
      run: |
        curl -s https://fluxcd.io/install.sh | sudo bash

    - name: Bootstrap Flux
      env:
        GITHUB_TOKEN: ${{ secrets.FLUX_BOOTSTRAP_TOKEN }}  # Add the required token for GitOps repository access
      run: |
        flux check --pre
        flux bootstrap github \
          --owner=${{ github.actor }} \
          --repository=${{ github.repository }} \
          --branch=main \
          --path=./clusters/kind-cluster \
          --personal
    
    - name: Verify deployment
      run: |
        flux get kustomizations
        kubectl get deployments -n app
        ./check.sh app hello-go "app\.kubernetes\.io/version" ${{ env.IMAGE_TAG }}
        kubectl describe deployments -n app hello-go