マイクロサービスに必要な技術要素はすべてSpring Cloudにある #DO07

• Toshiaki Maki (@making)
https://blog.ik.am
• Sr. Solutions Architect @Pivotal
• Spring Framework
• Cloud Foundry

https://github.com/Pivotal-Japan/cloud-native-workshop

Application coordination boilerplate patterns
Application configuration boilerplate patterns
Enterprise Java application boilerplate patterns
Runtime Platform, Infrastructure Automation boilerplate
patterns (provision, deploy, secure, log, data services, etc.)
CLOU
D
DESKTOP
Spring Boot
Spring Framework
Pivotal Cloud Foundry
Spring Cloud
Microservice operation boilerplate patterns
(Config Server, Service Discovery, Circuit Breaker)
SERVICES
Spring Cloud Services
今日の範囲

CLOU
D
DESKTOP
Spring Boot
Spring Framework
Spring Cloud
SERVICES

<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-server</artifactId>
</dependency>
@SpringBootApplication
@EnableConfigServer
public class MyConfigServerApplication { ... }
server.port=8888
spring.cloud.config.server.git.uri=https://github.com/xyz/config.git

<dependency>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
spring.application.name=order-service
spring.cloud.config.uri=http://localhost:8888

application-dev.properties
order-service-dev.properties
payment-service.profile
payment-service-dev.profile
payment-service-dev.profile

@RefreshScope
public class OrderService {
@Value("${message}")
String message;
public String hello() {
return message;
}
}

spring.profiles.active=vault,git
spring.cloud.config.server.vault.host=...
spring.cloud.config.server.git.uri=...
spring.cloud.config.token=...

RESTAPIRESTAPI
#0: URL + MD
#1: URL + MD
#2: URL + MD
#0: URL + MD
#1: URL + MD
#2: URL + MD

http://techblog.netflix.com/2012/09/eureka.html

<dependency>
<artifactId>spring-cloud-eureka-server</artifactId>
</dependency>
@EnableEurekaServer
public class MyEurekaServerApplication { ... }
server.port=8761
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

<dependency>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
spring.application.name=order-service # config-server使用時は
# bootstrap.propertiesに
eureka.client.service-url.defaultZone=http://localhost:8761
@EnableDiscovertyClient
public class OrderServiceApplication { ... }

DiscoveryClient discoveryClient;
public void order() {
List<ServiceInstance> list =
discoveryClient.getInstances("payment-service");
URL paymentUrl = list.get(0).getUri()
// ...
}
}

http://techblog.netflix.com/2013/01/announcing-ribbon-tying-netflix-mid.html

@Bean
@LoadBalanced
public RestTemplate restTemplate() {
return new RestTemplate();
}
@LoadBalanced RestTemplate restTemplate;
public void order() {
restTemplate
.postForEntity("http://payment-service",
Payment.class);}}

Ribbon
Server List
Server List
⏱

🙌
• レイテンシ低下
• ロードバランサの
負荷を軽減

行列ができるECサイトの悩み～ショッピングや決済の技術的問題と処方箋
https://www.slideshare.net/techblogyahoo/ec-72726085

http://techblog.netflix.com/2012/11/hystrix.html

<dependency>
<artifactId>spring-cloud-starter-hystrix</artifactId>
</dependency>
@EnableCircuitBreaker
public class OrderServiceApplication { ... }

@HystrixCommand(fallbackMethod = "getTop10")
public Recommendations getRecommendation(String username) {
return restTemplate.getForObject("http://recommendation?u={u}",
username, Recommendations.class);
}
public Recommendations getTop10(String username) {
return recommendationsCache.getTop10();
}

<dependency>
<artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
</dependency>
@EnableHystrixDashboard
public class HystrixDashboardApplication { ... }

@EnableBinding(Source.class)
public class OrderServiceApplication {
// ...
@Autowired Source source;
@PostMapping void order(@RequestBody Order order) {
Message message = MessageBuilder.fromPayload(order).build();
source.output().send(message);
}
}
spring.cloud.stream.bindings.output.destination=order

@EnableBinding(Sink.class)
public class DeliveryServiceApplication {
// ...
@StreamListener(Sink.INPUT)
void handlerOrder(@Payload Order order) {
deliverySerivice.deliver(order);
}
}
spring.cloud.stream.bindings.input.destination=order

spring.cloud.stream.bindings.input.group=point-service
spring.cloud.stream.bindings.input.group=delivery-service
spring.cloud.stream.bindings.input.group=notification-service

https://www.slideshare.net/makingx/event-driven-microservices-with-spring-cloud-stream-jjugccc-ccca3

2017-02-26 11:15:47.561 INFO [service1,2485ec27856c56f4,2485ec27856c56f4,true] 68058 --- [nio-
8081-exec-1] i.s.c.sleuth.docs.service1.Application : Hello from service1. Calling service2
2017-02-26 11:15:47.710 INFO [service2,2485ec27856c56f4,9aa10ee6fbde75fa,true] 68059 --- [nio-
8082-exec-1] i.s.c.sleuth.docs.service2.Application : Hello from service2. Calling service3
and then service4
2017-02-26 11:15:47.895 INFO [service3,2485ec27856c56f4,1210be13194bfe5,true] 68060 --- [nio-
8083-exec-1] i.s.c.sleuth.docs.service3.Application : Hello from service3
8082-exec-1] i.s.c.sleuth.docs.service2.Application : Got response from service3 [Hello from
service3]
2017-02-26 11:15:48.134 INFO [service4,2485ec27856c56f4,1b1845262ffba49d,true] 68061 --- [nio-
8084-exec-1] i.s.c.sleuth.docs.service4.Application : Hello from service4
service4]
2017-02-26 11:15:48.182 INFO [service1,2485ec27856c56f4,2485ec27856c56f4,true] 68058 --- [nio-
service2, response from service3 [Hello from service3] and from service4 [Hello from
service4]]

<dependency>
<artifactId>spring-cloud-sleuth-stream</artifactId>
</dependency>
<dependency>
<artifactId>spring-cloud-starter-zipkin</artifactId>
</dependency>

IaaS Cloud Foundry
ファイアウォールの設定
死活監視の設定
SSLの設定
ロードバランサの設定
アプリケーションのデプロイ
ランタイムのインストール
VMのプロビジョニング
cf push myapp
-p app.jar

マーケットプレースからインストール可能
https://azuremarketplace.microsoft.com/en-us/marketplace/apps/pivotal.pivotal-cloud-foundry

CLOU
D
DESKTOP
Spring Boot
Spring Framework
Spring Cloud
SERVICES
武器は揃っています。
いつ始めるのですか？

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リリース名主な新プロジェクト対応するSpring Boot
Angel Spring Cloud Netflix
Spring Cloud Config
1.2.x
Brixton Spring Cloud Stream
Spring Cloud Task
Spring Cloud Sleuth
Spring Cloud Consul
1.3.x, 1.4.x
Camden Spring Cloud
Contract
1.4.x, 1.5.x
Dalston Spring Cloud Vault 1.5.x
Edgware ? ?

マイクロサービスに必要な技術要素はすべてSpring Cloudにある #DO07

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