What is the purpose of service discovery in microservices, and how is it implemented?

Purpose: Service discovery helps microservices automatically discover and communicate

with each other, eliminating the need for hardcoded service addresses.

Implementation:

• DNS-based: Use DNS-based service discovery (e.g., Kubernetes DNS) to map

service names to IP addresses. This allows dynamic service discovery without

manual configuration.

• Service Registry: Tools like Consul, Eureka, or Zookeeper store service instances

in a central registry. Microservices query the registry to discover the location of other

services.

• Kubernetes: In Kubernetes, services and endpoints provide built-in service

discovery. Kubernetes automatically updates DNS records when pods or services are

created or removed.