test.yml

name: Docker scenarios
run-name: Docker scenarios

on:
  workflow_call:
    inputs:
      test_scenarios:
        description: 'A regexp to select what docker scenarios should be run'
        required: false
        type: string
        default: '.*'
      test_scenarios_exclude:
        description: 'A regexp dropping scenarios matched by test_scenarios (RE2, unanchored)'
        required: false
        type: string
        default: ''
      ddtrace_install_url:
        description: 'URL to a ddtrace install script (e.g. from S3 builds)'
        required: false
        type: string
        default: ''

jobs:
  list-scenarios:
    runs-on: ubuntu-latest
    outputs:
      scenarios: ${{ steps.list.outputs.scenarios }}
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
      - name: Set up Go
        uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
        with:
          go-version: 1.25.1
      - name: Compute matrix
        id: list
        # ./cmd/list-scenarios emits a JSON array of {shard, regex} entries,
        # chunking scenarios CHUNK_SIZE at a time. Chunking (vs one-per-scenario)
        # trades a bit of head-of-line blocking inside a chunk for:
        #   - fewer runner-provisioning hits (paid once per chunk, not per scenario)
        #   - free local-daemon layer caching: buildBaseImages runs once per chunk,
        #     and the chunk's scenarios reuse the built base image.
        run: |
          matrix=$(go run ./cmd/list-scenarios -pattern '${{ inputs.test_scenarios }}' -exclude '${{ inputs.test_scenarios_exclude }}' -chunk-size 3)
          echo "scenarios=$matrix" >> "$GITHUB_OUTPUT"

  docker-scenarios:
    needs: list-scenarios
    name: scenarios ${{ matrix.shard }}
    strategy:
      fail-fast: false
      max-parallel: 10
      matrix:
        include: ${{ fromJSON(needs.list-scenarios.outputs.scenarios) }}
    # Larger runner (dedicated VM per job) to reduce scheduling noise that
    # skews profiler error margins.
    runs-on: ubuntu-8-core-latest
    steps:
    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
    - name: Set up Go
      uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
      with:
        go-version: 1.25.1
    # Perf event paranoid setting: Not useful to everyone
    - name: Update perf_event_paranoid settings
      run: sudo sysctl kernel.perf_event_paranoid=1
    - name: Run Docker scenarios
      run: go test -timeout 20m -v -run TestScenarios
      env:
        # The matrix entry's regex is path-anchored (emitted by list-scenarios).
        TEST_SCENARIOS: ${{ matrix.regex }}
        DDTRACE_INSTALL_URL: ${{ inputs.ddtrace_install_url }}
    - name: Create unique artifact name
      id: artifact_name
      if: failure()
      run: |
        SAFE_SHARD=$(echo "${{ matrix.shard }}" | sed 's/[^a-zA-Z0-9]/_/g')
        echo "name=docker_scenario_test_data_${SAFE_SHARD}_${{ github.run_id }}" >> $GITHUB_OUTPUT
    - name: Upload test files
      uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
      if: failure()
      with:
        name: ${{ steps.artifact_name.outputs.name }}
        path: data
    - name: Notify Slack
      if: failure() && github.ref == 'refs/heads/main' && github.event_name != 'workflow_dispatch'
      run: |
        curl -X POST "${{ secrets.SLACK_WEBHOOK }}" \
             -H 'Content-Type: application/json' \
             -d "{'scenarios': '${{ matrix.names }}', 'failed_run_url': '${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}'}"