Microservices

Part I : Spring Cloud / Eureka & Zuul

Qui suis-je ?

@maxigaud

MaximeGaudin

merde.svbtle.com

Microservices ?

Products not Projects

Smart endpoints, dumb pipes

Decentralized Data Management

Design for Failure

SOA done right

Netflix

35% of US bandwidth

(youtube uses 15%) 

1 Billion req/d

Peak: 20k req/s

Netflix OSS

• Hystrix
• Turbine
• Archaius
• Feign
• Ribbon
• Servo
• Eureka
• Zuul
• Security Monkey
• ...

Today ?

1. Spring Cloud
   • Service Registry : Eureka
   • Reverse Proxy : Zuul (Routes + Ribbon + Hystrix)

Front

Server

Echo Service

Echo Service

Echo Service

Echo Service

Heartbeat

Front Server (Eureka +Zuul)

package com.mgaudin.sandbox.ht.front;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;

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

server.port=8081
spring.application.name=Front

eureka.instance.hostname=localhost
eureka.instance.lease-renewal-interval-in-seconds=5

eureka.client.serviceUrl.defaultZone= http://${eureka.instance.hostname}:${server.port}/eureka/
eureka.client.registry-fetch-interval-seconds=5

eureka.dashboard.path=/dashboard

echo.ribbon.ServerWeightTaskTimerInterval=3000

Echo Service

@RestController
@RequestMapping("/")
public class EchoController {
    @RequestMapping(method = RequestMethod.POST)
    public String echo(@RequestBody(required = false) String input) throws UnknownHostException {
        return String.format("%s (from %s)", input == null ? "" : input, InetAddress.getLocalHost().getHostAddress());
    }

    @RequestMapping(method = RequestMethod.GET, produces = "application/json")
    public String getIP() throws UnknownHostException {
        return String.format("{ \"ip\": \"%s\" }", InetAddress.getLocalHost().getHostAddress());
    }
}

spring.application.name=echo

eureka.client.serviceUrl.defaultZone=http://localhost:8081/eureka/
eureka.client.registry-fetch-interval-seconds=5

eureka.instance.lease-renewal-interval-in-seconds=5
eureka.instance.metadata-map.instanceId=${spring.application.name}:${spring.application.instance_id:${random.value}}

latency.artificial.wait=0

Thank you Spring !

DEMO

Deployment ?

Front

Server

Echo Service

Echo Service

Echo Service

Echo Service

Heartbeat

Maven

Docker 

Images

 Docker Compose

Docker-Compose

Maven

<plugin>
    <groupId>com.spotify</groupId>
    <artifactId>docker-maven-plugin</artifactId>
    <version>0.2.6</version>
    <configuration>
        <imageName>humantalks/${project.artifactId}</imageName>
        <dockerDirectory>${project.build.sourceDirectory}/../docker</dockerDirectory>
        <resources>
            <resource>
                <targetPath>/</targetPath>
                <directory>${project.build.directory}</directory>
                <include>${project.build.finalName}.jar</include>
            </resource>
        </resources>
    </configuration>

    <executions>
        <execution>
            <phase>package</phase>
            <goals>
                <goal>build</goal>
            </goals>
        </execution>
    </executions>
</plugin>

Compose

front:
  image: humantalks/front
  ports:
    - 8081:8081
 
echo:
  image: humantalks/echo
  links: 
    - front
  expose:
    - 8080

echoSlow:
  image: humantalks/echo
  links: 
    - front
  environment:
    - latency.artificial.wait=800
  expose:
    - 8080

Docker

FROM java:8
MAINTAINER Maxime Gaudin <gaudin.maxime@gmail.com>

ADD echo-1.0-SNAPSHOT.jar app.jar
RUN bash -c 'touch /app.jar'

COPY conf/application.properties application.properties

ENTRYPOINT ["java", "-jar", "/app.jar", "--spring.config.location=file:/application.properties"]

Démo

Il reste du temps ?!

Merci !

• https://github.com/MaximeGaudin/HT-Microservices
• http://martinfowler.com/articles/microservices.html
• http://www.forbes.com/sites/quickerbettertech/2014/11/24/netflix-and-youtube-now-consume-50-of-the-internet-as-the-argument-for-net-neutrality-weakens/
• http://techblog.netflix.com/2011/12/making-netflix-api-more-resilient.html
• http://netflix.github.io/#repo