Service Discovery

ELI5 — The Vibe Check

Service discovery is how microservices find each other without hardcoding addresses. When Service A needs to talk to Service B, it asks a registry 'where is Service B right now?' and gets a current address. It's like a phone book that updates itself when services move or scale.

Real Talk

Service discovery is the automatic detection and registration of services in a distributed system. Services register themselves with a discovery server (Consul, etcd, Eureka) and query it to locate other services. It enables dynamic scaling, failover, and load balancing without hardcoded hostnames. Supports both client-side and server-side discovery patterns.

When You'll Hear This

"Service discovery automatically routes traffic to the new instance after we scaled up." / "Without service discovery, every config change requires redeploying half the services."