# Load-test workflow — closes the #8 acquisition-readiness blocker from
# the 2026-05-01 issuer coverage audit (see
# the 2026-05-01 issuer coverage audit).
#
# CADENCE: workflow_dispatch + weekly cron, NOT per-push. Load tests
# are minutes long and don't provide useful per-PR signal — per-push
# pressure goes through ci.yml. This workflow exists to (a) catch
# gradual regressions from cumulative changes that no single PR
# triggered, and (b) give an operator a one-click way to capture
# numbers before tagging a release.
#
# THRESHOLDS: defined in deploy/test/loadtest/k6.js (p99 < 5s for
# issuance-acceptance, p99 < 2s for list, error rate < 1%). k6 exits
# non-zero on any breach, which propagates through `docker compose up
# --exit-code-from k6` → `make loadtest` → this workflow's exit.

name: loadtest

on:
  workflow_dispatch:
    # Manual trigger from the Actions tab. Use before tagging a
    # release or after a meaningful tuning commit.

  schedule:
    # Mondays at 06:00 UTC. Off-peak; catches regressions accumulated
    # over the previous week's merges. Once a baseline is committed
    # in deploy/test/loadtest/README.md, drift relative to that
    # baseline is the signal — diff the captured summary.json
    # against the committed numbers.
    - cron: '0 6 * * 1'

# Reduce permissions — this workflow doesn't write to PRs or push tags.
permissions:
  contents: read

jobs:
  k6:
    name: k6 throughput run
    runs-on: ubuntu-latest
    # 25-minute hard cap. Pre-Bundle-10: 15min was enough for the API
    # tier alone (~7 minutes total). Post-Bundle-10 the harness boots
    # four additional target sidecars (nginx, apache, haproxy, f5-mock)
    # before the k6 run; their healthchecks add ~30-60s. The k6 scenarios
    # themselves are still 5 minutes (run in parallel with the API
    # scenarios, not serially). 25 minutes absorbs that plus slow CI
    # runners and cold image caches without letting a stuck container
    # consume the runner indefinitely.
    timeout-minutes: 25

    steps:
      - name: Checkout
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4

      - name: Set up Docker Buildx
        # The compose stack builds the certctl image from the repo
        # root Dockerfile. Buildx gives the build a usable cache and
        # works with newer compose versions.
        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f  # v3

      - name: Run loadtest
        run: make loadtest
        env:
          # Disable BuildKit progress noise so the run log is
          # diff-able against past runs.
          BUILDKIT_PROGRESS: plain

      - name: Upload summary
        # Always upload the summary so a regression has a diffable
        # artifact even when k6 exited non-zero. summary.json is the
        # authoritative machine-readable form; summary.txt is the
        # human-readable text the README baseline tracks.
        if: always()
        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02  # v4
        with:
          name: k6-summary-${{ github.run_id }}
          path: deploy/test/loadtest/results/
          retention-days: 90

  # ---------------------------------------------------------------------------
  # Phase 8 SCALE-H2 — scale-tier scenarios. Three new k6 drivers:
  #   - bulk-renewal: 10K-cert seed + criteria-mode POST /bulk-renew
  #   - acme-burst:   200 concurrent VUs against directory/nonce/ARI
  #   - agent-storm:  5K-agent seed + 167 heartbeats/sec sustained
  #
  # Matrix dispatch so each scenario runs on its own runner and a
  # regression in one doesn't mask another. The matrix runs in parallel,
  # which keeps total wall time around the existing 25-minute cap rather
  # than ~70 minutes serialised. Each scenario brings up the full
  # loadtest compose stack independently — there's no shared state
  # between scenarios that would benefit from a single-runner serial
  # invocation.
  #
  # Cadence: same as the API + connector tier job above (workflow_dispatch
  # + Mondays 06:00 UTC). The scale scenarios DO produce useful per-PR
  # signal in theory, but the per-run cost (image build + 5min run × 3)
  # is too high to gate on every PR; weekly is the right trade-off.
  # ---------------------------------------------------------------------------
  k6-scale:
    name: k6 scale tier (${{ matrix.scenario }})
    runs-on: ubuntu-latest
    timeout-minutes: 25
    needs: k6
    strategy:
      # Parallel: a failure in one scenario shouldn't cancel the others.
      # Each scenario's threshold breach is independent diagnostic data.
      fail-fast: false
      matrix:
        scenario:
          - bulk-renewal
          - acme-burst
          - agent-storm

    steps:
      - name: Checkout
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f  # v3

      - name: Run scale loadtest (${{ matrix.scenario }})
        env:
          BUILDKIT_PROGRESS: plain
        run: |
          case "${{ matrix.scenario }}" in
            bulk-renewal) make loadtest-scale-bulk ;;
            acme-burst)   make loadtest-scale-acme ;;
            agent-storm)  make loadtest-scale-agent ;;
            *) echo "::error::unknown scenario ${{ matrix.scenario }}"; exit 1 ;;
          esac

      - name: Upload summary
        if: always()
        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02  # v4
        with:
          # Per-scenario artifact name so the three matrix runs don't
          # collide on upload.
          name: k6-scale-${{ matrix.scenario }}-${{ github.run_id }}
          path: deploy/test/loadtest/results/
          retention-days: 90