test-k8s-service-apps-proxy.yml

name: 'K8S: Apps Proxy'

on:
  # This workflow is also part of the release pipeline,
  # in that case, the actual version is deployed twice.
  workflow_call:
  # In PR the previous version is deployed first and then the actual version.
  pull_request:
    paths:
      - .github/workflows/test-k8s-service-apps-proxy.yml
      - provisioning/apps-proxy/**
      - provisioning/common/**

env:
  MINIKUBE_PROFILE: apps-proxy
  MINIKUBE_DRIVER: docker

  KUBERNETES_NAMESPACE: apps-proxy
  KUBERNETES_ROLLOUT_WAIT: 120s
  REMOVE_RESOURCES_LIMITS: true

  SERVICE_NAME: Apps Proxy
  API_RELEASE_NAME: apps-proxy
  METRICS_PORT: 9000

defaults:
  run:
    working-directory: provisioning/apps-proxy

jobs:
  test:
    name: "K8S test: Data Apps Proxy"
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.ref }}

      - name: Create artifacts directory
        run: mkdir -p /tmp/artifacts

      - name: Copy latest scripts to a temp dir
        run: cp -R ${{ github.workspace }}/provisioning/common/scripts /tmp/latest-scripts

      - name: Install gron tool
        run: |
          url="https://github.com/tomnomnom/gron/releases/download/v0.7.1/gron-linux-amd64-0.7.1.tgz"
          curl -L "$url" | tar -xz -C /usr/local/bin

      - name: Install MiniKube
        run: /tmp/latest-scripts/minikube/install.sh

      - name: Start MiniKube
        run: /tmp/latest-scripts/minikube/start.sh

      - name: Set Kubernetes namespace
        run: kubectl config set-context --current "--namespace=$KUBERNETES_NAMESPACE"

      - name: Checkout BASE branch (or HEAD if it is not a pull request)
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.base.ref }}

      - name: Deploy the old version, from the BASE branch
        continue-on-error: true
        run: ./deploy_local.sh

      - name: Dump the old version (for diff)
        continue-on-error: true
        run: sleep 10 && /tmp/latest-scripts/k8s/dump.sh /tmp/artifacts/test-k8s-state.old.json

      - name: Checkout HEAD branch
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.ref }}

      - name: Deploy the new version, from the HEAD branch
        run: ./deploy_local.sh

      - name: Dump the new version (for diff)
        if: always()
        run: |
          set -Eeuo pipefail
          # Delete empty old replica sets
          emptyReplicaSets=$(kubectl get replicasets --ignore-not-found | tail --lines=+2 | awk '{if ($2 + $3 + $4 == 0) print $1}')
          echo -e "Found empty replica sets:"
          echo "$emptyReplicaSets"
          echo "-------------------------"
          echo "$emptyReplicaSets" | xargs --no-run-if-empty -I {} kubectl delete replicaset "{}"
          # Wait for pod startup/termination
          sleep 10
          # Dump objects
          /tmp/latest-scripts/k8s/dump.sh /tmp/artifacts/test-k8s-state.new.json

      - name: Check deployment of the API nodes
        if: always()
        run: kubectl rollout status "deployment/$API_RELEASE_NAME" --timeout=10s

      - name: Check access to API metrics from the DataDog Agent
        if: always()
        run: |
          set -Eeuo pipefail
          kubectl create namespace datadog || true
          export POD_IP=`kubectl get pod -l app=apps-proxy -o=jsonpath='{.items[0].status.podIP}'`
          echo "Pod IP: $POD_IP"
          kubectl run --attach --rm --restart=Never check-api-datadog \
          --namespace datadog \
          --image docker.io/alpine/curl \
          --labels="app=datadog-agent" \
          --env="POD_IP=$POD_IP" \
          --env="METRICS_PORT=$METRICS_PORT" \
          --command -- sh -c "set -eo pipefail; curl -f -L --max-time 5 "$POD_IP:$METRICS_PORT/metrics" | tail"

      - name: Check forbidden access to the API metrics from other places
        if: always()
        run: |
          set -Eeuo pipefail
          export POD_IP=`kubectl get pod -l app=apps-proxy -o=jsonpath='{.items[0].status.podIP}'`
          echo "Pod IP: $POD_IP"
          if kubectl run --attach --rm --restart=Never check-api-other \
            --image docker.io/alpine/curl \
            --env="POD_IP=$POD_IP" \
            --env="METRICS_PORT=$METRICS_PORT" \
            --command -- sh -c "set -eo pipefail; curl -f -L --max-time 5 "$POD_IP:$METRICS_PORT/metrics" | tail"; then
            echo "The command did not fail, but it should have."
            exit 1
          else
            echo "The command failed, OK."
            exit 0
          fi

      - name: Check Proxy response
        if: always()
        run: curl --fail -L -s --max-time 5 "$(minikube service --url $API_RELEASE_NAME --namespace $KUBERNETES_NAMESPACE)/health-check"

      - name: Diff the old and the new Kubernetes state
        if: always()
        run: |
          set -Eeuo pipefail

          # Diff JSON states
          /tmp/latest-scripts/k8s/diff.sh \
            /tmp/artifacts/test-k8s-state.old.json \
            /tmp/artifacts/test-k8s-state.new.json \
            /tmp/artifacts/test-k8s-state.diff || true

          # Remove ANSI sequences
          sed -e 's/\x1b\[[0-9;]*m//g' -i /tmp/artifacts/test-k8s-state.diff || true

          # Prepare PR comment message
          echo -e "### ${{ env.SERVICE_NAME }} Kubernetes Diff [CI]\n\n" >> /tmp/artifacts/test-k8s-state.diff.message
          echo -e "Between \`base\` ${{ github.event.pull_request.base.sha }} :arrow_left:  \`head\` ${{ github.event.pull_request.head.sha }}.\n\n" >> /tmp/artifacts/test-k8s-state.diff.message
          echo -e "<details>\n<summary>Expand</summary>\n\n\`\`\`diff\n" >> /tmp/artifacts/test-k8s-state.diff.message
          head -c 50000 /tmp/artifacts/test-k8s-state.diff >> /tmp/artifacts/test-k8s-state.diff.message || true
          echo -e "\n\n(see artifacts in the Github Action for more information)\n\`\`\`\n</details>" >> /tmp/artifacts/test-k8s-state.diff.message

      - name: Dump logs
        if: always()
        run: |
          /tmp/latest-scripts/minikube/logs.sh /tmp/artifacts &&
          /tmp/latest-scripts/k8s/logs.sh /tmp/artifacts

      - name: Upload artifacts
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: test-k8s-state-apps-proxy
          path: /tmp/artifacts
          if-no-files-found: error

      - name: Send PR comment
        uses: marocchino/sticky-pull-request-comment@v2
        with:
          header: "${{ env.KUBERNETES_NAMESPACE }}-kubernetes-state-diff"
          recreate: true
          path: /tmp/artifacts/test-k8s-state.diff.message