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A reference implementation of Netflix's microservice resilience architecture. Zuul provides dynamic routing and cross-cutting concerns (auth, rate limiting). Eureka enables client-side service discovery. Ribbon handles intelligent load balancing. Hystrix implements the circuit breaker pattern to prevent cascading failures. Chaos Monkey tests resilience by randomly terminating instances in production.
Netflix serves 200M+ subscribers across 190 countries. A single microservice failure could cascade across hundreds of services, causing global outages. Traditional load balancing couldn't handle the scale or provide fault tolerance. Service discovery needed to work across multiple AWS regions.
Implemented a multi-layer resilience strategy: Zuul as the edge gateway handles routing, auth, and rate limiting. Eureka provides peer-to-peer service discovery (no central registry). Ribbon enables client-side load balancing with zone-aware routing. Hystrix wraps every remote call in a circuit breaker — when failure rate exceeds threshold, calls are short-circuited. Chaos Monkey randomly kills production instances to verify resilience. Atlas collects 1B+ metrics/minute for real-time observability.