spring cloud in a nutshell

1 Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under aCreative Commons Attr ibut ion-NonCommercial l icense: http:/ /creat ivecommons.org/ licenses/by-nc/3.0/Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under a

Creative Commons Attr ibut ion-NonCommercial l icense: http:/ /creat ivecommons.org/ licenses/by-nc/3.0/

Spring Cloud in a Nutshell

Tsuyoshi Miyake, Pivotal Software, Inc.@tsuyokb

2 Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under aCreative Commons Attr ibut ion-NonCommercial l icense: http:/ /creat ivecommons.org/ licenses/by-nc/3.0/

Agenda

§ Spring Framework in a word!

§ What is Cloud Foundry?• History• Java/Spring on CF

§ What is Spring Cloud?• Goals• @ServiceScan• Extension

§ Demo


Spring Framework in a word!


“Don't call us, we'll call you- Hollywood principle


Container(App Server)

アプリケーション in アプリケーション・サーバー（コンテナ）

Application

Application Information(Context)

ServiceServiceService


Yes, we know a lot..

GRAILS

Full-stack, Web

XD

Stream, Taps, Jobs

BOOT

Bootable, Minimal, Ops-Ready

Big, Fast,

FlexibleData

Web, Integration,

Batch

WEB

Controllers, REST,WebSocket

INTEGRATION

Channels, Adapters,Filters, Transformers

BATCH

Jobs, Steps,Readers, Writers

BIG DATA

Ingestion, Export,Orchestration, Hadoop

DATA

NON-RELATIONALRELATIONAL

CORE

GROOVYFRAMEWORK SECURITY REACTOR


What is Cloud Foundry?


A bit history of Spring & Cloud Foundry

“Cloud Foundry will be the natural cloud deployment choice for Spring developers.Launching Cloud Foundry, The Industry’s First Open PaaS

Rod Johnson, Spring Engineering Blog, Apr 12 2011


3 meanings of Cloud Foundry for Spring/Java developers

As App Devs As Dev Ops As Dojo Devs

• UAA/Login Server with Spring Security

• Java Buildpack• Service Broker with

Spring Boot/MVC

• Spring + Grails native support

• Gradle, Maven plugin• Eclipse CF plugin• Spring Cloud

(Today’s Topic)


アプリケーションの Cloud Foundry Runtime へのデプロイ

① アプリケーションとメタデータの push

push app

Router② サービスの作成とバインド

③ アプリケーションのステージング

④ アプリケーションのデプロイ

⑤ アプリケーションのヘルスチェックPivotalCFElasticRuntime

Blobstore DB

Cloud Controller

Service Broker Node(s)

DEADEA

DEADEA

+ app MD

+ =

Servicecredentials


サービスの作成とバインディング

Router

CloudFoundryRuntime(ERS)

DBServicecredentials

reserve resourcescreate service (HTTP) create service (HTTP)

bind service (HTTP)bind service (HTTP) obtain connection data

CLI Cloud Controller

ServiceBroker

DataService


アプリケーションのステージングRo

uter

Blobstore DB

DEA Detect Compile UploadNoYesSystem

Buildpacks

+ =

Cloud Controller

PivotalCFElasticRuntime


What is Spring Cloud?


“Spring Cloud is DI Containerfor Cloud OS- Anonymous


Container(Cloud Foundry)

アプリケーション in Cloud Foundry （コンテナ）

Application

Application Information(Context)

ServiceServiceService


Spring Cloud Goals

§ クラウド内のアプリケーション環境、およびサービスの抽象化

§ 多様なクラウドへの対応

• Cloud Foundry• Heroku• Local

§ 拡張性

• 新クラウド環境への対応• 新サービスへの対応• 新フレームワークへの対応


Service Scan (@ServiceScan)

§ Java Config (@Configuration) と併用

§ アプリケーションにバインドされたサービスをスキャン

§ 各サービスについて Bean を作成

§ (Option) クラウド環境でのみ有効にするためには@Profile(“cloud”) を追加

@Configuration@ServiceScan// @Profile("cloud”)public class CloudConfig {}


Service Scan (@ServiceScan) カスタマイズ

§ パターン 1 : 同一タイプのサービス (e.g. DataSource) が 2 つ以上ある

§ パターン 2 : 各サービスの細かな設定が必要

§ パターン 3 : 独自サービスが必要

@Configurationpublic class CloudConfig extends AbstractCloudConfig {

@Beanpublic DataSource mysqlDataSource() {

return connectionFactory().dataSource("mysql-service");}@Beanpublic DataSource postgresDataSource() {

PoolConfig poolConfig = new PoolConfig(20, 200);ConnectionConfig connectionConfig = new

ConnectionConfig("characterEncoding=UTF-8");DataSourceConfig serviceConfig = new DataSourceConfig(poolConfig,

connectionConfig);return connectionFactory().dataSource("postgres-service”, serviceConfig);

}}


拡張性 (1) –新クラウド環境への対応 (Cloud Platform)

§ CloudConnector interface を実装• isInMatchingCloud(): 意図した Cloud 環境かどうかを判定• getApplicationInstanceInfo(): アプリケーションの情報（ID, ホスト名など）を返す• getServiceInfos(): アプリケーションが利用可能なサービスの接続情報を返す

§ Cloud Platform の登録• META-INF/services/org.springframework.cloud.CloudConnectorに実装クラス• java.util.ServiceLoaderにより load() される

public interface CloudConnector {boolean isInMatchingCloud();ApplicationInstanceInfo getApplicationInstanceInfo();List<ServiceInfo> getServiceInfos();

}


拡張性 (1) –新クラウド環境への対応 (Cloud Platform)

§ CloudFoundryでの実装例 (CloudFoundryConnector)public class CloudFoundryConnector extends AbstractCloudConnector<Map<String,Object>> {public boolean isInMatchingCloud() {return environment.getEnvValue("VCAP_APPLICATION") != null;

}public ApplicationInstanceInfo getApplicationInstanceInfo() {Map<String, Object> rawApplicationInstanceInfo =objectMapper.readValue(environment.getEnvValue("VCAP_APPLICATION"), Map.class);

…}protected List<Map<String,Object>> getServicesData() {String servicesString = environment.getEnvValue("VCAP_SERVICES");…

}}


拡張性 (2) –新サービスへの対応

§ ServiceInfoCreator interface を実装• accept(): 引数 Service Data を調べ、該当サービスでハンドル可能か判断• createServiceInfo(): サービス情報（URI など）を返す

§ サービスの登録

• META-INF/services/以下に実装クラスを列挙したファイルを置く• 名称は Cloud Platform 依存

org.springframework.cloud.cloudfoundry.CloudFoundryServiceInfoCreator• CloudFoundryの場合 MysqlServiceInfoCreator, MongoServiceInfoCreator など

public interface ServiceInfoCreator<SI extends ServiceInfo, SD> {public boolean accept(SD serviceData);public SI createServiceInfo(SD serviceData);

}


拡張性 (2) –新サービスへの対応

§ CloudFoundryでの実装例 (MongoServiceInfoCreator)

public class MongoServiceInfoCreator extendsCloudFoundryServiceInfoCreator<MongoServiceInfo> {public boolean accept(Map<String, Object> serviceData) {return tagsMatch(serviceData) || labelStartsWithTag(serviceData) ||

uriMatchesScheme(serviceData);}public MongoServiceInfo createServiceInfo(Map<String,Object>

serviceData) {@SuppressWarnings("unchecked")Map<String,Object> credentials = (Map<String, Object>)

serviceData.get("credentials");String id = (String) serviceData.get("name");String uri = getStringFromCredentials(credentials, "uri", "url");return new MongoServiceInfo(id, uri);

}}


拡張性 (3) –新フレームワークへの対応

§ spring-service-connector のみがSpring に依存

§ つまりここを “my-service-connector” にすることで独自のフレームワークに対

応可能

§ 具体的にはServiceConnectorCreator.create() を実装し、ServiceInfo(MysqlServiceInfo) からフレームワークの Object (DataSource) に変換

spring-service-connector

core

cloudfoundry-connector

heroku-connector

localconfig-connector

Spring Cloud


Demo

Unless otherwise indicated, these slides are© 2013-2014 Pivotal Software, Inc. and licensed under aCreative Commons Attr ibut ion-NonCommercial l icense:http:/ /creat ivecommons.org/ licenses/by-nc/3.0/

hello-spring-cloud

SPRING CLOUD


Learn More. Stay Connected.

§ Spring Cloud Project: http://projects.spring.io/spring-cloud/

§ Source Code: https://github.com/spring-projects/spring-cloud

§ Sample: https://github.com/cloudfoundry-samples/hello-spring-cloud

§ Recording: https://www.youtube.com/watch?v=F49_LJJPs_s

§ Blogs• https://spring.io/blog/2014/06/03/introducing-spring-cloud• https://spring.io/blog/2014/07/29/using-spring-cloud-programmatically• https://spring.io/blog/2014/08/05/extending-spring-cloud

spring cloud in a nutshell

Technology

pivotal software

orgl icensesbync3

sl ides

spring developers

meanings of cloud foundry

agenda spring framework

spring engineering blog

spring bootmvc spri