szsascha / eureka-service-discovery

Sandbox project to learn about Spring Cloud Netflix Eureka

Eureka service discovery

This project shows a simple implementation of Spring Cloud Netflix Eureka and Spring Cloud OpenFeign.

Eureka is used as a registry for all started services and Feign is used to call another service, just by its name. The combination of Eureka and Feign also provides a load balancing to distribute the requests to all available instances of a service.

Setup

1. Clone this repository
2. Run mvn clean install in the root dir

Run the environment

1. Start Eureka by cd into spring-cloud-eureka and run mvn spring-boot:run
2. Start multiple instances of the city service by cd into city-service and run mvn spring-boot:run multiple times in different terminal sessions
3. Start the address service by cd into address-service and run mvn spring-boot:run

Test and check the running services

1. Open http://localhost:8761 to see if the services are listed in Eureka
2. Check the randomly assigned serverport of the address-service in the console
3. Send a REST request to the address-service: GET http://localhost:PORT/addresses/Sample

The address-service calls each time the city-service to determine the name of a city by the given country and postalcode. You also should see this requests in the logs. Each time another instance of city-service should be requested.