The document discusses service discovery with Eureka and Spring Cloud. It introduces traditional applications where services have fixed locations versus modern applications where services are dynamic. It explains that service discovery with a service registry like Eureka allows services to find each other and load balance requests. The rest of the document demonstrates configuring Eureka as a service registry and client applications that can discover and consume services registered with Eureka.

1. Service Discovery
with Eureka and Spring Cloud
Twitter: https://twitter.com/_marceloserpa
Github: https://github.com/marceloserpa

2. Agenda
● Traditional vs Modern application
● Communication between services
● Service discovery
● Service registry
● Eureka and Spring Cloud
● Many samples

3. Traditional application
To perform communication between services we need know the location of the
service(port, host). In traditional applications it's a simple task because services
run in a fixed and known location.

4. Modern application
In modern applications the services are running in a dynamic enviroment. A
service can have N instances running in N different machines. In this case, to
know host and port of each service is very painful.

5. The problem

6. Service discovery

7. Service registry

8. Eureka...
“Eureka is a REST (Representational State Transfer) based service that is primarily
used in the AWS cloud for locating services for the purpose of load balancing and
failover of middle-tier servers.”

9. Eureka server with Spring Cloud configuration

10. Eureka server dashboard

11. Eureka client configuration

12. When you run the client application...

13. Show all instances registered

14. Consuming a service registered on Eureka

15. Load balancing request

16. Conclusion...

17. References
● https://github.com/Netflix/eureka
● http://microservices.io/patterns/client-side-discovery.html
● https://www.nginx.com/blog/service-discovery-in-a-microservices-architecture/
● http://salerno-rafael.blogspot.com.br/2016/08/spring-cloud-netflix-how-works-service.html
● http://microservices.io/patterns/server-side-discovery.html
● http://martinfowler.com/articles/microservices.html

18. Twitter: https://twitter.com/_marceloserpa
Github Samples: https://github.com/marceloserpa/marcelo_serpa_sandbox/tree/master/spring-cloud-eureka-poc