7.4Running Synthetics as a Cron Job in CI

# .github/workflows/synthetic-monitor.yml
name: Synthetic Monitoring
on:
  schedule:
    - cron: '*/5 * * * *'  # every 5 minutes
  workflow_dispatch: {}     # allow manual trigger

jobs:
  synthetic-us-east:
    runs-on: ubuntu-latest  # GitHub-hosted runner (US East)
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 20
      - run: npm ci
      - name: Install Playwright browsers
        run: npx playwright install --with-deps chromium

      - name: Run synthetic tests
        run: npx playwright test synthetic/ --reporter=json
        env:
          BASE_URL: https://store.example.com
          SYNTHETIC_MODE: true

      - name: Push metrics to Datadog
        if: always()
        run: |
          python scripts/push_synthetic_metrics.py \
            --results playwright-report/results.json \
            --region us-east-1 \
            --datadog-api-key ${{ secrets.DATADOG_API_KEY }}

      - name: Alert on failure
        if: failure()
        run: |
          curl -X POST "${{ secrets.PAGERDUTY_EVENTS_URL }}" \
            -H "Content-Type: application/json" \
            -d '{
              "routing_key": "${{ secrets.PD_ROUTING_KEY }}",
              "event_action": "trigger",
              "payload": {
                "summary": "Synthetic checkout flow FAILED in us-east-1",
                "severity": "critical",
                "source": "github-actions-synthetic"
              }
            }'