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Service Registry

Service Registry is a centralized system that stores and manages all microservices' location and status. It registers each microservice and helps them discover each other.

Key Points

  • Central registry for all microservices
  • Collects and maintains service information (name, port, IP, status)
  • Allows microservices to discover each other (Service Discovery)
  • Eliminates hard-coded service URLs
  • Keeps track of service availability & health

Enable Service registry — Eureka Server provied by Netflix

1. Add Eureka server dependency

    <dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    </dependency>

2. Set Server Port (default: 8761) 

server.port=8761

3. Enable Eureka Server in Main Class

@EnableEurekaServer
@SpringBootApplication
public class ServiceRegistryApplication { 
    public static void main(String[] args) {
        SpringApplication.run(ServiceRegistryApplication.class, args);
    }
}

4. Disable Self-Registration (Optional, Recommended for server)

By default, Eureka Server tries to register as a discovery client application. Disable this behavior:

eureka.client.fetch-registry=false
eureka.client.register-with-eureka=false

5. Access Eureka Dashboard : http://localhost:8761/

Note

By default ,Microservice are not going to register with service registry (Eureka). We must enable them as discovery clients separately. using Eureka client dependency