1) Overview

• Live gateway: https://centralized-api-orchestration-engine.onrender.com/demo
• Live Grafana dashboard: https://csrosex.grafana.net/public-dashboards/3c2996c1426f4726bbd53f729b5c2a2c
• Go-based API gateway with layered middleware (logging, tracing, metrics, tenant resolution) fronting user and order services via reverse proxy.
• Built for resilience and insight: rate limiting per tenant (Redis token bucket), chaos injection, and analytics capture for every attempt.

2) Highlights

• Every request walks the same, intentional path: logging → metrics → tracing → tenant lookup → analytics → rate limit → chaos → reverse proxy.
• Resilience is baked in: Redis keeps tenant limits and analytics steady across restarts, and chaos controls let you rehearse failure without surprises.
• Observability is default, not optional: Prometheus, JSON metrics, and OpenTelemetry keep tenants isolated via X-API-Key while showing you what is really happening.

3) Live Observability

• Public views are on so you can watch the system breathe without setting anything up.

Signal	Where to view	Notes
Dashboard	https://csrosex.grafana.net/public-dashboards/3c2996c1426f4726bbd53f729b5c2a2c	Refreshes roughly every 30s.
Prometheus scrape	https://centralized-api-orchestration-engine.onrender.com/metrics	Text exposition format for scrapers.
JSON metrics	https://centralized-api-orchestration-engine.onrender.com/admin/metrics	Easy to curl, diff, and script.
Traces	internal/observability/otel.go	Point to your collector endpoint to receive spans.

4) Chaos and Traffic Demo (5 minutes)

• Baseline: check status at /admin/chaos/status then hit /users with X-API-Key: sk_test_123.
• Induce failure: POST to /admin/chaos with { "fail_backend": true, "duration_sec": 30 }, then hit /users to see 503s.
• Latency or drop tests: use slow_ms or drop_percent in the chaos payload; observe p95/p99 jump in Grafana within 30 seconds.
• Recovery: POST /admin/chaos/recover, send a few normal requests, and confirm metrics normalize.

5) Run Locally

• Prereqs: Go 1.22+, Redis (localhost:6379), ports 8080 (gateway), 9001/9002 (mock services).
• Run gateway: go run cmd/gateway/main.go.
• Hit it: curl -H "X-API-Key: sk_test_123" http://localhost:8080/users or visit http://localhost:8080/demo.