name: PR
on:
  pull_request:
  push:

jobs:
  pr-shellcheck:
    name: Lint bash code with shellcheck
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - name: Run ShellCheck
      uses: bewuethr/shellcheck-action@v2

  pr-lint-code:
    name: Lint golang code
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - name: Find go version
      run: |
        GO_VERSION=$(awk '/^go/ {print $2};' go.mod)
        echo "::set-output name=version::${GO_VERSION}"
      id: awk_gomod
    - name: Ensure go version
      uses: actions/setup-go@v2
      with:
        go-version: "${{ steps.awk_gomod.outputs.version }}"
    - name: Lint cmd folder
      uses: Jerome1337/golint-action@v1.0.2
      with:
        golint-path: './cmd/...'
    - name: Lint pkg folder
      uses: Jerome1337/golint-action@v1.0.2
      with:
        golint-path: './pkg/...'

  pr-check-docs-links:
    name: Check docs for incorrect links
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v1
    - name: Link Checker
      id: lc
      uses: peter-evans/link-checker@v1
      with:
        args: -r *.md *.yaml */*/*.go -x .cluster.local
    - name: Fail if there were link errors
      run: exit ${{ steps.lc.outputs.exit_code }}

  # This should not be made a mandatory test
  # It is only used to make us aware of any potential security failure, that
  # should trigger a bump of the image in build/.
  pr-vuln-scan:
    name: Build image and scan it against known vulnerabilities
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Find go version
        run: |
          GO_VERSION=$(awk '/^go/ {print $2};' go.mod)
          echo "::set-output name=version::${GO_VERSION}"
        id: awk_gomod
      - name: Ensure go version
        uses: actions/setup-go@v2
        with:
          go-version: "${{ steps.awk_gomod.outputs.version }}"
      - run: make DH_ORG="${{ github.repository_owner }}" VERSION="${{ github.sha }}" image
      - uses: Azure/container-scan@v0
        with:
          image-name: docker.io/${{ github.repository_owner }}/kured:${{ github.sha }}

  # If the PRs don't break the behaviour in the helm chart, we can simply publish the helm chart at the time of the release.
  e2e-helm:
    name: "Functional test of helm chart, e2e testing"
    runs-on: ubuntu-latest
    # only build with oldest and newest supported, it should be good enough.
    strategy:
      matrix:
        kubernetes:
          - "1.18"
          - "1.20"
    steps:
      - uses: actions/checkout@v2
      - name: Find go version
        run: |
          GO_VERSION=$(awk '/^go/ {print $2};' go.mod)
          echo "::set-output name=version::${GO_VERSION}"
        id: awk_gomod
      - name: Ensure go version
        uses: actions/setup-go@v2
        with:
          go-version: "${{ steps.awk_gomod.outputs.version }}"
      - name: Build artifacts
        run: |
          make DH_ORG="${{ github.repository_owner }}" VERSION="${{ github.sha }}" image
          make DH_ORG="${{ github.repository_owner }}" VERSION="${{ github.sha }}" helm-chart

      - name: "Workaround 'Failed to attach 1 to compat systemd cgroup /actions_job/...' on gh actions"
        run: |
          sudo bash << EOF
              cp /etc/docker/daemon.json /etc/docker/daemon.json.old
              echo '{}' > /etc/docker/daemon.json
              systemctl restart docker || journalctl --no-pager -n 500
              systemctl status docker
          EOF

      # Default name for helm/kind-action kind clusters is "chart-testing"
      - name: Create 5 node kind cluster
        uses: helm/kind-action@master
        with:
          config: .github/kind-cluster-${{ matrix.kubernetes }}.yaml

      - name: Preload previously built images onto kind cluster
        run: kind load docker-image docker.io/${{ github.repository_owner }}/kured:${{ github.sha }} --name chart-testing

      - name: Deploy kured on default namespace with its helm chart
        run: |
          # Documented in official helm doc to live on the edge
          curl https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash
          # Refresh bins
          hash -r
          helm install kured ./charts/kured/ --set configuration.period=1m
          kubectl config set-context kind-chart-testing
          kubectl get ds --all-namespaces
          kubectl describe ds kured

      - name: Ensure kured is ready
        uses: nick-invision/retry@v2.4.0
        with:
          timeout_minutes: 10
          max_attempts: 10
          retry_wait_seconds: 60
          # DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE should all be = 5
          command: "kubectl get ds kured | grep -E 'kured.*5.*5.*5.*5.*5' "

      - name: Create reboot sentinel files
        run: |
          ./tests/kind/create-reboot-sentinels.sh

      - name: Follow reboot until success
        env:
          DEBUG: true
        run: |
          ./tests/kind/follow-coordinated-reboot.sh

  # This workflow is useful when introducing new versions, to ensure our manifests
  # still work (even if there might be no manifest 'code' change).
  # The version used here is what hasn't been tested with the helm chart
  deploy-manifests:
    name: Deploy kured with current manifests
    runs-on: ubuntu-latest
    strategy:
      matrix:
        kubernetes:
          - 1.18
    steps:
      - uses: actions/checkout@v2
      - name: Find go version
        run: |
          GO_VERSION=$(awk '/^go/ {print $2};' go.mod)
          echo "::set-output name=version::${GO_VERSION}"
        id: awk_gomod
      - name: Ensure go version
        uses: actions/setup-go@v2
        with:
          go-version: "${{ steps.awk_gomod.outputs.version }}"
      - name: Build artifacts
        run: |
          make DH_ORG="${{ github.repository_owner }}" VERSION="${{ github.sha }}" image
          make DH_ORG="${{ github.repository_owner }}" VERSION="${{ github.sha }}" manifest
      - name: Workaround "Failed to attach 1 to compat systemd cgroup /actions_job/..." on gh actions
        run: |
          sudo bash << EOF
              cp /etc/docker/daemon.json /etc/docker/daemon.json.old
              echo '{}' > /etc/docker/daemon.json
              systemctl restart docker || journalctl --no-pager -n 500
              systemctl status docker
          EOF
      # Default name for helm/kind-action kind clusters is "chart-testing"
      - name: Create kind cluster
        uses: helm/kind-action@master
        with:
          config: .github/kind-cluster-${{ matrix.kubernetes }}.yaml
      - name: Preload previously built images onto kind cluster
        run: kind load docker-image docker.io/${{ github.repository_owner }}/kured:${{ github.sha }} --name chart-testing
      - name: Install kured with kubectl
        run: |
          kubectl apply -f kured-rbac.yaml && kubectl apply -f kured-ds.yaml
      - name: Ensure kured is ready
        uses: nick-invision/retry@v2.4.0
        with:
          timeout_minutes: 10
          max_attempts: 10
          retry_wait_seconds: 60
          # DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE should all be = to cluster_size
          command: "kubectl get ds -n kube-system kured | grep -E 'kured.*5.*5.*5.*5.*5'"