عرض عملي: فشل متتالٍ ثم الإصلاح

خطوة بخطوة

1. Put Toxiproxy between orders and payments; run a load test on checkout and on GET /products.
2. Add 5 s latency to the proxy: checkout hangs and product listing also slows as the pool fills.
3. Add a 500 ms read timeout on the payments client; checkout fails fast but still hammers payments.
4. Add a circuit breaker and a bulkhead for payments; repeat: failures are fast, product listing stays healthy.
5. Planned mistake: configure the breaker to count 400 responses as failures; it opens on validation errors. Fix: record only timeouts and 5xx.
6. Remove the latency and watch the breaker go half-open, then closed.