name: Test Suite for CoreDNS

on:
  - pull_request

jobs:
  lint-and-unit-tests:
    name: Lint & Unit tests
    runs-on: ubuntu-latest
    steps:
    - name: Check out code
      uses: actions/checkout@v2
    - name: Setup Python
      uses: actions/setup-python@v2
      with:
        python-version: 3.8
    - name: Install Tox
      run: pip install tox
    - name: Run lint & unit tests
      run: tox

  func-test:
    name: Functional test with MicroK8s
    runs-on: ubuntu-latest
    timeout-minutes: 20
    steps:
    - name: Check out code
      uses: actions/checkout@v2
    - name: Setup Python
      uses: actions/setup-python@v2
      with:
        python-version: 3.8
    - name: Fix global gitconfig for confined snap
      run: |
        # GH automatically includes the git-lfs plugin and configures it in
        # /etc/gitconfig.  However, the confinement of the charmcraft snap
        # means that it can see that this file exists but cannot read it, even
        # if the file permissions should allow it; this breaks git usage within
        # the snap. To get around this, we move it from the global gitconfig to
        # the user's .gitconfig file.
        cat /etc/gitconfig >> $HOME/.gitconfig
        sudo rm /etc/gitconfig
    - name: Install MicroK8s
      uses: balchua/microk8s-actions@v0.1.3
      with:
        rbac: 'true'
        storage: 'true'
        dns: 'true'  # required for juju, will adjust later
    - name: Install Dependencies
      run: |
        pip install tox
        sudo snap install juju --classic
        sudo snap install juju-wait --classic
        sudo usermod -aG microk8s $USER
        sudo snap install charmcraft --beta
        sudo snap install yq
    - name: Build charm
      run: |
        if ! charmcraft build; then
          echo Build failed, full log:
          cat "$(ls -1t "$HOME"/snap/charmcraft/common/charmcraft-log-* | head -n1)"
          exit 1
        fi
    - name: Bootstrap MicroK8s with Juju
      run: sg microk8s 'juju bootstrap microk8s microk8s'
    - name: Add model
      run: juju add-model coredns microk8s
    - name: Deploy CoreDNS
      run: |
        upstream_image=$(yq eval '.resources.coredns-image.upstream-source' metadata.yaml)
        juju deploy ./coredns.charm --resource coredns-image=$upstream_image --config forward=8.8.8.8
    - name: Wait for stable environment
      run: juju wait -wv
    - name: Tell MicroK8s to use CoreDNS charm
      run: |
        cluster_ip=$(sudo microk8s.kubectl get svc -n coredns coredns -o jsonpath='{..spec.clusterIP}')
        sudo sed -i -e "s/--cluster-dns=.*/--cluster-dns=$cluster_ip/" /var/snap/microk8s/current/args/kubelet
        sudo systemctl restart snap.microk8s.daemon-kubelet
    - name: Run functional test
      run: tox -e func
    - name: Juju Status
      if: failure()
      run: sudo juju status
    - name: Juju Log
      if: failure()
      run: sudo juju debug-log --replay --no-tail -i coredns
    - name: Microk8s Status
      if: failure()
      run: sudo microk8s.kubectl get all -A
    - name: Microk8s Pod Log
      if: failure()
      run: sudo microk8s.kubectl logs -n coredns -l juju-app=coredns