Spring Cloud Eureka, Hystrix and Zuul Example Components eureka-service - The Eureka service which is the Service Registry hello-server - The Service which is going to give data to the Client. hello-client - The Service which is going to get data from Server via the Discovery Service from the Service Registry (eureka-service). zuul-service - This is the Gateway/Edge Service which is registered with Eureka and routes the requests to Client and Server using Eureka Service.