Implementing Eureka Service Discovery

In a microservices architecture, services often need to communicate with each other. But how does one service find another?

• Dynamic IPs: Service instances can scale up/down, getting new IP addresses.
• Load Balancing: Multiple instances of a service need to be discovered.
• Manual Configuration: Hardcoding addresses is fragile and not scalable.

Service discovery solves this by providing a central registry where services register themselves.

Netflix Eureka is a powerful solution for service discovery in microservices. It's a REST-based service that is primarily used in the AWS cloud for locating services to achieve load balancing and failover of middle-tier services.

Eureka consists of two main components:

• Eureka Server: The central registry that holds information about all registered services.
• Eureka Client: A component embedded in each microservice that registers with the Eureka Server.