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Cloud Native Javawith Spring Cloud Services

Will Tran@fivetenwill

Roy Clarkson Craig Walls@royclarkson @habuma

Unless o therw ise ind ica ted , these s l ides are © 2013-2016 P ivo ta l So f tware , Inc . and l i censed under a Creat ive Commons At t r ibu t ion-NonCommerc ia l l i cense: h t tp : / / c rea t ivecommons.org / l i censes /by-nc /3 .0 / 2


+

3

= ?


Config ServerService RegistryCircuit BreakerDashboard

ease of usesecurityreliability


Demo

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I know Kung Fu

• Eureka Server (Spring Cloud Netflix)• Config Server (Spring Cloud Config)• Hystrix Dashboard (Spring Cloud

Netflix)

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Create a Spring Cloud server

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1. cf create-service

1. create a Spring Boot app2. add Spring Cloud starters3. add @EnableXxxxServer4. add configuration5. deploy and manage


Create a Spring Cloud client application

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1. create a Spring Boot app2. add Spring Cloud Services

starters3. cf bind-service

1. create a Spring Boot app2. add Spring Cloud starters3. add configuration

• Eureka-first or config-first bootstrapping?

4. add security


Secure client - server communication

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1. OAuth Client Credentials provisioned in cf bind-service

2. Token exchange built into spring-cloud-services-starter-*

1. add spring-boot-starter-security2. setup user3. copy credentials to client (env

var?)4. use credentials in basic auth

URIs5. …Or maybe something fancier


Zero Downtime Scaling & Upgrades

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1. cf update service my-service -c ‘{“count":2, "upgrade":true}'

1. Provision new server(s)2. Configure them for peer

replication (Eureka)3. Map route (DNS?) to new

servers4. Start them5. Deprovision old servers


Service Brokers

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Service brokers extend Cloud Foundry to provide resources that can be consumed by applications

http://docs.cloudfoundry.org/services/

Cloud Foundry

Service Broker

provision instance

get catalog

delete binding

delete instance

create binding

http://docs.cloudfoundry.org/services/


SCS is built on Spring Projects Spring BootSpring Cloud Netflix Spring Cloud Config ServerSpring Cloud Connectors

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Spring SecuritySpring Security OAuth2Spring Data JPASpring AMQP

Spring Boot CF Service BrokerCloud Foundry Java Client


Demo

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Config Server

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OverviewService• deploys a Spring Cloud Config server for each service instance provisioned• Config Server now supports all features of the Spring Cloud Brixton Git backend

• multiple repositories• pattern matching• placeholders.

• Git repositories can be accessed:• HTTPS or SSH• via an HTTP or HTTPS proxy server• Authenticate via username/password or SSH private key

Security• only bound applications are able to see configuration

Client Applications• starter automatically adds a property source configured for the config server

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Configuration Server flow

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Dependencies

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<dependency> <groupId>io.pivotal.spring.cloud</groupId> <artifactId>spring-cloud-services-starter-config-client</artifactId> </dependency>

<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-config-client</artifactId> </dependency>

Spring Cloud:

Spring Cloud Services:


Service Registry

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OverviewService• deploys a Spring Cloud Netflix Eureka server for each service instance provisioned

Security• only the application that originally creates an instance record is allowed to update

or remove that record• only the server that first registered a record is allowed modify or delete it on an

application’s behalf• only a single server in a datacenter can register applications with a given name

Client Applications• starter automatically configures a DiscoveryClient

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Service Registry Flow

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FortuneTellerService

Where can I findFortuneTellerService?

Give me arandom fortune

<application> <name>FortuneTellerService</name> <instance> <hostName>chip</hostName> <ipAddr>fortune-service.blue.springapps.io</ipAddr>…<application>

GET http://fortune-service.blue.springapps.io/random


Dependencies

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<dependency> <groupId>io.pivotal.spring.cloud</groupId> <artifactId>spring-cloud-services-starter-service-registry</artifactId> </dependency>

<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency>

Spring Cloud:


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Circuit Breaker Dashboard

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OverviewService• deploys for each service instance provisioned:

• Spring Cloud Netflix Hystrix dashboard• Spring Cloud Netflix Turbine server• Pivotal RabbitMQ service instance

Client Applications• starter automatically configures a Turbine AMQP client

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Circuit Breaker Dashboard Flow

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Dependencies

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<dependency> <groupId>io.pivotal.spring.cloud</groupId> <artifactId>spring-cloud-services-starter-circuit-breaker</artifactId> </dependency>

<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-hystrix</artifactId> </dependency>

Spring Cloud:


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@Configuration public class CloudConfig extends CloudConnectorsConfig { @Bean @HystrixConnectionFactory public ConnectionFactory hystrixConnectionFactory() { return connectionFactory().hystrixConnectionFactory(); } }

@Configuration public class RabbitConfig extends AbstractCloudConfig { @Bean @Primary public ConnectionFactory rabbitConnectionFactory() { return connectionFactory().rabbitConnectionFactory(); } }


What’s new in SCS 1.2• Service Registry on steroids

• Registry can be shared across spaces, orgs, or datacenters• Apps prefer to talk to other apps in the same datacenter, but failover to

the other datacenter if required• Blue-green deployments of apps can be facilitated by the service registry

• eg distinct CF apps menu-service-blue and menu-service-green register as MENU-SERVICE

• Use Spring Retry for 0 downtime automatic failover

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What’s coming in SCS 1.3 (Q4)• Upgrade of all components to Spring Cloud OSS Camden release train.• Baseline of Spring Boot 1.4.x required for new features support.• Support for Vault as a Spring Cloud Config Server environment repository

(http://cloud.spring.io/spring-cloud-static/spring-cloud.html#_vault_backend

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http://cloud.spring.io/spring-cloud-static/spring-cloud.html#_vault_backend


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PMs


Engineering


Learn More. Stay Connected.

@fivetenwilldocs.pivotal.io/spring-cloud-services

@springcentralspring.io/blog

@pivotalpivotal.io/blog

@pivotalcfhttp://engineering.pivotal.io

http://docs.pivotal.io/spring-cloud-services

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