This document discusses microservices architectures and provides examples of tools used in microservices architectures like those implemented at Netflix. It describes common microservices patterns like service discovery (Eureka), configuration management (Archaius), load balancing (Ribbon), circuit breaking (Hystrix), monitoring (Turbine), edge services (Zuul), and logging (Blitz4j). It also discusses using these tools with Spring Cloud and provides code samples for configuring services using Netflix OSS and Spring Cloud.

1. Arquitecturas de Microservicios
Ernesto Hernández Rodríguez
Arquitecto Java en Medianet Software
@ehdez73

4. ¿MicroServicios?

5. "Microservices is a software architecture design
pattern, in which complex applications are composed of
small, independent processes communicating with each
other using language-agnostic APIs. These services are
small, highly decoupled and focus on doing a small
task."

6. Evolución arquitectura

7. Beneficios
∘ Servicios pequeños
∘ Principio de responsabilidad única
∘ Fácilmente abarcable
∘ Políglota
∘ PoC
∘ Despliegues
∘ Escalado eficiente

9. BUT…
WAIT A
MOMENT!

10. Nuevos desafíos
∘ ¿Cómo localizo los servicios?
∘ ¿Qué pasa si alguno falla?
∘ ¿Cómo los configuro?
∘ ¿Y las trazas?
∘ ¿Y los diferentes entornos?

11. Necesitamos

13. http://screenagers.me/wp-content/uploads/2012/01/US-bandwidth.png

14. EUREKA ARCHAIUS HYSTRIX TURBINE
ZUUL BLITZ4J RIBBON
http://netflix.github.io

15. EUREKA
Service locator
∘ API REST
∘ Eureka Server - Peer awarness
∘ Eureka Client - Service Discovery
https://github.com/Netflix/eureka

16. ARCHAIUS
Configuration management
∘ Apache Commons Configuration
∘ Configuration Source
∘ High throughput
∘ Thread safe
∘ Composite configuration
∘ JMX
https://github.com/Netflix/Archaius

17. RIBBON
Interprocess communication
∘ Balanceador de carga
∘ Cliente Eureka
∘ Hystrix
https://github.com/Netflix/Ribbon

18. HYSTRIX
Circuit Breaker
∘ Aislar puntos de acceso
∘ Tolerancia a fallos
∘ Fallos en cascada
∘ Dashboard
https://github.com/Netflix/Hystrix

19. http://cloud.spring.io/spring-cloud-netflix/images/HystrixGraph.png
Circuit Breaker

20. Circuit Breaker
http://cloud.spring.io/spring-cloud-netflix/images/HystrixFallback.png

21. Hystrix Dashboard
http://techblog.netflix.com/2012/12/hystrix-dashboard-and-turbine.html

22. TURBINE
Stream aggregator
Turbine is an application that aggregates all of the
relevant /hystrix.stream endpoints into a
combined /turbine.stream for use in the Hystrix
Dashboard
https://github.com/Netflix/Turbine

23. http://youtu.be/zWM7oAbVL4g

24. ZUUL
Edge Service
∘ Router and filter
∘ Reverse proxy
∘ Ribbon & Eureka
∘ Hystrix
https://github.com/Netflix/Zuul

25. BLITZ4J
Fast asynchronous logging
∘ Basado en log4j
∘ Menos recursos
∘ Más rápido
∘ Archaius
https://github.com/Netflix/Blitz4j

27. CorrelationID
http://ragavj.blogspot.com.es/2013/08/how-to-lookup-error-in-sharepoint-2010.html

28. ELK STACK
Files Logstash ElasticSearch Kibana

29. Spring Cloud
https://github.com/spring-cloud

30. Eureka Server
@Configuration
@EnableAutoConfiguration
@EnableEurekaServer
public class Application {
public static void main(String[] args) {
new SpringApplicationBuilder(Application.class)
.web(true)
.run(args);
}
}

31. Eureka Server
@Configuration
@EnableAutoConfiguration
@EnableEurekaServer
public class Application {
application.yml
server:
port: 8761
eureka:
instance:
public static void main(String[] args) {
hostname: localhost
client:
registerWithEureka: false
fetchRegistry: false
serviceUrl:
new SpringApplicationBuilder(Application.class)
.web(true)
.run(args);
}
}
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

32. Eureka Client
@Configuration
@ComponentScan
@EnableAutoConfiguration
@EnableEurekaClient
@RestController
public class Application {
@RequestMapping("/")
public String home() { return "Hello world"; }
public static void main(String[] args) {
new SpringApplicationBuilder(Application.class)
.web(true).run(args);
}
}

33. Eureka Client
@Configuration
@ComponentScan
@EnableAutoConfiguration
@EnableEurekaClient
@RestController
public class Application {
@RequestMapping("/")
public String home() { return "Hello world"; }
public static void main(String[] args) {
new SpringApplicationBuilder(Application.class)
.web(true).run(args);
}
}
application.yml
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/

34. Ribbon
Transparente vía RestTemplate
RibbonAutoConfiguration.java
@Bean
@ConditionalOnMissingBean(RestTemplate.class)
public RestTemplate restTemplate(RibbonInterceptor ribbonInterceptor) {
RestTemplate restTemplate = new RestTemplate();
List<ClientHttpRequestInterceptor> list = new ArrayList<>();
list.add(ribbonInterceptor);
restTemplate.setInterceptors(list);
return restTemplate;
}
}
http://github.com/.../RibbonAutoConfiguration.java

35. Hystrix wrapper
@Component
public class StoreIntegration {
@HystrixCommand(fallbackMethod = "defaultStores")
public Object getStores(Map<String, Object> parameters) {
//do stuff that might fail
}
public Object defaultStores(Map<String, Object> parameters) {
return /* something useful */;
}
}

36. Hystrix Config
@Configuration
@EnableAutoConfiguration
@EnableHystrix
@EnableHystrixDashboard
@ComponentScan
public class Application {
public static void main(String[] args) {
new SpringApplicationBuilder(Application.class)
.web(true)
.run(args);
}
}

37. Zuul Config
@EnableZuulProxy
zuul.proxy.mapping: /api
zuul.proxy.route.users: /users
/api/users → /users
Hystrix → Ribbon → Eureka

38. Spring Cloud Config
∘ Properties en repositorio Git
∘ API
∘ Profiles
∘ Encriptado
∘ @RefreshScope
∘ PropertySource & Env
https://github.com/spring-cloud/spring-cloud-config

39. Spring Cloud Config - Server
@Configuration
@EnableAutoConfiguration
@EnableEurekaClient
@EnableConfigServer
public class ConfigServerApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigServerApplication.class, args);
}
}

40. Spring Cloud Config - Server
@Configuration
@EnableAutoConfiguration
@EnableEurekaClient
@EnableConfigServer
public class ConfigServerApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigServerApplication.class, args);
}
}
bootstrap.yml
spring:
application:
name: configserver
encrypt:
keyStore:
location: classpath:keystore.jks
password: ${KEYSTORE_PASSWORD} # foobar
alias: test
application.yml
spring:
cloud:
config:
server:
basedir: target/config
uri: https://github.com/ehdez73/cloud-config
security:
user:
password: '{cipher}AQBunH7b87s86E='

41. Spring Cloud Config - Client
@Configuration
@EnableAutoConfiguration
@RestController
public class Application {
@RequestMapping("/")
public String home() { return "Hello world"; }
public static void main(String[] args) {
new SpringApplicationBuilder(Application.class)
.web(true)
.run(args);
}
}

42. Spring Cloud Config - Client
@Configuration
@EnableAutoConfiguration
@RestController
public class Application {
@RequestMapping("/")
public String home() { return "Hello world"; }
public static void main(String[] args) {
new SpringApplicationBuilder(Application.class)
.web(true)
.run(args);
}
}
bootstrap.yml
spring:
cloud:
config:
uri: http://localhost:${config.port:8888}

43. DevOps

46. https://www.docker.com/whatisdocker/

48. Dockerfile
FROM dockerfile/java
MANTAINER Ernesto Hdez, ehdez73@gmail.com
ADD target/myapp1.jar /tmp/myapp1.jar
EXPOSE 8080
ENTRYPOINT ["java", "-jar", "/tmp/myapp1.jar"]
$ mvn package
$ docker build -t ehdez73/myapp1 .
$ docker run -d -p 8080:8080 --name="m1" ehdez73/myapp1
$ docker ps
$ docker stop m1
$ docker start m1
https://registry.hub.docker.com/u/dockerfile/java/dockerfile/

49. http://www.fig.sh/

50. Fig.sh

51. fig.yml
myapp1:
build: .
ports:
- "8880:8880"
myapp2:
image: ehdez73/myapp2
ports:
- "8881:8881"
links:
- db
db:
image: postgres
http://www.fig.sh/yml.html
$ fig up

52. DEMO

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https://github.com/ehdez73/minionize-the-world
The minions

54. Muchas gracias
@ehdez73