Spring Cloud OSS Team

Spring Cloud Commercial Team

Cloud Native

• Distributed
• Automated
• Organizational
• Anti-fragile
• Replaceable

I like 'cloud native' better than microservice. I think its more descriptive and doesn't have the awkwardness of having 'micro" in the name.

Cloud Native with Spring Boot

It needs to be super easy to implement and update a service:

@RestController
class ThisWillActuallyRun {
  @RequestMapping("/")
  String home() {
    Hello World!
  }
}

Example Distributed System: Minified

No Man (Microservice) is an Island

It's excellent to be able to implement a microservice really easily (Spring Boot), but building a system that way surfaces "non-functional" requirements that you otherwise didn't have.

There are laws of physics that make some problems unsolvable (consistency, latency), but brittleness and manageability can be addressed with generic, boiler plate patterns.

Emergent features of cloud native systems

Coordination of distributed systems
leads to boiler plate patterns

• Distributed/versioned configuration
• Service registration and discovery
• Routing
• Service-to-service calls
• Load balancing
• Circuit Breaker
• Asynchronous / Reactive
• Distributed messaging

Example: Coordination Boiler Plate

Netflix OSS

• Eureka
• Hystrix & Turbine
• Ribbon
• Feign
• Zuul

• Archaius

• Curator

• Asgaard
• ...

Netflix Uses Spring

• http://spinnaker.io/ - Continuous Deployment tool
• http://www.infoq.com/presentations/spring-cloud-netflix

Example: Spring Cloud and Netflix

Configuration Server

• Pluggable source
• Git implementation
  • Per service repos
• Versioned
• Rollback-able
• Encryption
• Configuration client
  auto-configured via starter

Discovery: Eureka

• Service Registration Server
• Highly Available
• In AWS terms, multi Availability
  Zone and Region aware

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

Client Side Load-balancing: Ribbon

• Client side load balancer
• Pluggable
• Round robin, random,
  weighted response time
• RestTemplate integration

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

Feign: declarative rest clients

• Write an interface (similar to Spring Data Repositories)
• Ribbon Integration
• @EnableFeignClients

Feign: declarative rest clients

@FeignClient(name = "stores")
public interface StoreClient {
    @RequestMapping(method = GET, value = "/simple/stores")
    List<Map<String, ?>> getStores();

    @RequestMapping(method = GET, value = "/stores/{storeId}")
    Store getStore(@PathVariable("storeId") String storeId,
            @RequestParam("myparam") String myparam);
}

Circuit Breaker Metrics

• Via actuator /metrics
• Server side event stream /hystrix.stream
  • also via rabbitmq
• Dashboard app via @EnableHystrixDashboard

Spring Cloud Security

Enable Single Sign On (SSO) with an OAuth2 provider declared in external properties.

@EnableOAuth2Sso

Enable security using OAuth2 access tokens

@EnableResourceServer

https://spring.io/guides/tutorials/spring-security-and-angular-js/

Spring Cloud Bus

• Distributed actuator
• /bus/env and /bus/refresh actuator endpoints
• uses Spring Cloud Stream

Spring Cloud Stream (Brixton)

• Message Driven Services
• Broker is abstracted by Binder
• uses Spring Messaging and Spring Integration
• Binders for rabbitmq, redis or kafka

@SpringBootApplication
@EnableBinding(Sink.class)
@MessageEndpoint
public class CounterApplication {
  @ServiceActivator(inputChannel = Sink.INPUT)
    @Transactional
    public void accept(Vote vote) {
        logger.info("Received: " + vote);
    }
}

Spring Cloud Sleuth (Brixton)

• Distributed Tracing
  (latency analysis)
• Instrumented Spring
  Libraries (auto-configured)
• Open Zipkin Integration

No soup for you!

Spring Cloud Sidecar

• For you non-java apps
• Modeled after Netflix Prana
• Built in zuul proxy

http://techblog.netflix.com/2014/11/prana-sidecar-for-your-netflix-paas.html

Spring Cloud Brixton

Milestones:

• Spring Cloud Consul: Config, Discovery, Bus, Leader Election, Locks
• Spring Cloud Zookeeper: Config, Discovery, Locks, Leader Election
• Spring Cloud Sleuth distributed tracing

Previews, experiments or ideas (ie: no guarantees!)

• Spring Cloud Etcd: Config, Discovery, Locks, Leader Election

Utah Spring Users Group

Utah Spring Users Group is where you can learn more about Spring, Spring Boot, and more Spring Projects. We support the Spring community along the Wasatch Front.

• http://www.meetup.com/utahspring/
• @utahspring
• http://utahspring.github.io/
• First meeting: Thursday, February 11, 2016

Links

• https://github.com/spring-cloud
• https://github.com/spring-cloud-samples
• http://spencer.gibb.us/preso/cloud-native-ujug.html
• Twitter: @spencerbgibb
• Email: sgibb@pivotal.io