Update playground to Barbacane 0.10.0 - #3
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- Pin images to 0.10.0 (.env.example, compose defaults).
- WAF demo: showcase 0.10.0's response-phase inspection and audit logging.
- audit: on writes a structured waf.audit record per transaction.
- New /waf/leak endpoint + phase-4 rules (030/040) block a response body
that leaks an AWS access key id (outbound anomaly scoring, mirrors CRS
959100).
- Drop the stale "@detectSQLi/@detectXSS not yet implemented" narrative;
those classifiers have shipped since 0.9.0.
- Fix metrics scraping: 0.10.0 serves metrics on the admin API port, not
/__barbacane/metrics on the data plane. Expose the admin API on 8082
(--admin-bind 0.0.0.0:8082), point Prometheus at barbacane:8082/metrics, and
update the docs. Prometheus was scraping a 404, so Grafana had no gateway data.
Verified locally on the full podman stack: 14/14 endpoint smoke checks green,
the response-phase leak blocks with rule 9009120, audit records emit, and the
Prometheus barbacane target is up.
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📝 WalkthroughWalkthroughThe playground upgrades Barbacane images to 0.10.0, moves metrics to the admin API on port 8082, and adds a response-phase WAF rule that blocks responses containing AWS access key IDs. ChangesPlayground runtime and WAF flow
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant Client
participant Barbacane
participant MockUpstream
Client->>Barbacane: GET /waf/leak
Barbacane->>MockUpstream: Dispatch request
MockUpstream-->>Barbacane: Response containing AWS access key ID
Barbacane->>Barbacane: Score response-body match
Barbacane-->>Client: HTTP 403
Merge Risk: 🔵 Low · up to The playground remains usable, but its admin data may be exposed on reachable hosts and its leak demo misses temporary AWS credentials. Both fixes are small and advisable before merge. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Actionable comments posted: 2
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Inline comments:
In `@docker-compose.yml`:
- Line 45: Update the admin API port mapping in the Docker Compose service to
bind host port 8082 only to loopback while preserving container port 8082, so
Prometheus can still reach barbacane:8082 over the Docker network.
In `@specs/waf-rules/030-response.conf`:
- Line 5: Update the RESPONSE_BODY SecRule expression to match both AKIA- and
ASIA-prefixed AWS access-key IDs while preserving the existing 16-character
uppercase alphanumeric suffix requirement.
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.env.exampleREADME.mdconfigs/prometheus/prometheus.ymldocker-compose.ymlplayground.httpspecs/waf-demo.yamlspecs/waf-rules/010-attacks.confspecs/waf-rules/030-response.confspecs/waf-rules/040-response-blocking.conf
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- Publish the unauthenticated admin API to loopback only (127.0.0.1:8082:8082); Prometheus reaches the container port over the Docker network regardless. - Detect temporary ASIA-prefixed AWS access keys in the response-body demo rule, not only long-term AKIA keys.
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Thanks @coderabbitai. Both addressed in 4b573b4:
Both are provably-correct one-line changes that don't alter the verified behaviour (loopback binding doesn't change Prometheus reachability; the regex still matches the demo payload), so I did not respin the full stack for them. |
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- scripts/smoke.sh: exercises every demonstrated use case against a running
stack (core, OIDC bookings, events->NATS, S3, MCP, CORS, WAF request- and
response-phase, admin metrics, Prometheus scrape) and exits non-zero on any
failure. Reusable locally.
- .github/workflows/ci.yml:
- compile: the specs must compile with the pinned gateway build.
- smoke: brings up the gateway, its upstreams and Prometheus (not the
Grafana/Loki/Tempo/Alloy viewers) and runs scripts/smoke.sh; dumps logs on
failure.
- Runs on PR and push; a nightly schedule runs against `latest` to catch
upstream gateway drift; workflow_dispatch takes an image tag.
Verified locally end to end: 23/23 checks green.
… volume Under Docker the artifact volume is root-owned and the image's non-root user cannot write it (compilation fails with Permission denied). Podman's rootless userns mapping hid this locally. Run the one-shot compiler as root; the gateway still reads the artifact read-only as its non-root user.
- smoke.sh: rustfs-init seeds the assets bucket after the gateway is already serving, so the /assets/welcome.txt check could race the seeder (404 in CI). Wait for the asset to be available as part of readiness. - Bump actions/checkout v4 -> v5 (v4 runs on the deprecated Node 20).
1 participant
Brings the playground up to the 0.10.0 gateway and showcases its headline features.
Version
.env.example, compose defaults).WAF demo → 0.10.0 features
audit: on— a structuredwaf.auditrecord per inspected transaction (matches, scores, verdict, request id). See it withpodman logs playground_barbacane_1 | grep waf.audit./waf/leakendpoint + response-phase rules (030-response.confscoring,040-response-blocking.confoutbound blocking, mirroring CRS 959100): the upstream returns a body carrying an AWS access key id, and a phase-4 rule blocks the response (403) before it reaches the client.Fix: metrics scraping was broken
0.10.0 serves metrics on the admin API port, not
/__barbacane/metricson the data plane. Prometheus was scrapingbarbacane:8080/__barbacane/metrics, which 404s, so Grafana had no gateway data. Now the admin API is exposed on8082(--admin-bind 0.0.0.0:8082), Prometheus scrapesbarbacane:8082/metrics, and the docs point atlocalhost:8082/metrics.Verified locally
Full podman stack on 0.10.0:
/waf/leakblocks with outbound rule9009120; audit records emit for blocked and allowed transactions.barbacanetarget is up (barbacane:8082/metrics).Summary by CodeRabbit
New Features
Improvements