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

Spring IO Platform

Example: Coordination Boiler Plate

Netflix OSS

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

• Archaius

• Curator

• Asgaard
• ...

Example: Spring Cloud and Netflix

Configuration Server

• Pluggable source
• Git implementation
  • Per service repos
• SVN implementation
• Versioned
• Rollback-able
• 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

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

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

@EnableOAuth2Resource

Spring Cloud Bus

• Distributed actuator
• /bus/env and /bus/refresh actuator endpoints
• uses Spring Messaging and Spring 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 Future

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

• Distributed Locks, Leader election
• Consul: Config, Discovery, Bus, Locks
• Zookeeper or etcd: Locks, Leader Election,
  Discovery, Config
• Zipkin for distributed tracing
• Moar Bus! Moar Messaging!

Links

• https://github.com/spring-cloud
• https://github.com/spring-cloud-samples
• http://blog.spring.io
• http://spencer.gibb.us/preso/cloud-native-devnexus.html
• https://github.com/spencergibb/myfeed
• Twitter: @spencerbgibb, @david_syer
• Email: sgibb@pivotal.io, dsyer@pivotal.io