Beginner's Guide To Spring Cloud

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!2 Nice To Meet You • Rookie engineer on the Spring Cloud team • Get In Touch • @ryanjbaxter • http://ryanjbaxter.com

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!3 Agenda ▪ Spring Cloud Background ▪ Key Projects ▪ Getting Down and Dirty With Spring Cloud ▪ Questions

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!4 Survey Time

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!5 Anyone Know This Guy? O ur Ultim ate G oal

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!6 Why Spring Cloud? ▪ In general, cloud native apps are a good thing, just not easy ▪ It was easy for big companies to put forth the resources to succeed with Cloud Native, but what about the little guys? ▪ Why do we have to reinvent the wheel each time someone wants to build a Cloud Native app? ▪ Follow the Spring Boot model of providing useful defaults for Cloud Native apps with the ability to easily configure them ▪ Cloud Agnostic

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!7 Spring Cloud Components Configuration Service Discovery Routing and Messaging Tracing API Gateway Circuit Breakers CI Pipelines and Testing

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!8 Yes There Are More • Spring Cloud Bus • Spring Cloud Stream • String Cloud Data and Task • Spring Cloud AWS ….and more

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!9 Configuration ▪ We want to remove the configuration out of the application to centralized store across all environments ▪ Spring Cloud Config Server can use Git, SVN, filesystem and Vault to store config ▪ Config clients (microservice apps) retrieve the configuration from the server on startup ▪ Can be notified of changes and process changes in a refresh event

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!10 Service Discovery ▪ With the dynamic nature of any cloud native application depending on things like URLs can be problematic ▪ Service Discovery allows micro services to easily discover the routes to the services is needs to use ▪ Netflix Eureka ▪ Zookeeper ▪ Consul

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!11 Routing and Messaging ▪ Your cloud native app will be composed of many microservices so communication will be critical ▪ Spring Cloud supports communication via HTTP requests or via messaging ▪ Routing and Load Balancing: ▪ Netflix Ribbon and Feign ▪ Messaging: ▪ RabbitMQ or Kafka

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!12 API Gateway ▪ API Gateways allow you to route API requests (internal or external) to the correct service ▪ Netflix Zuul ▪ Leverages service discovery and load balancer

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!13 Circuit Breakers ▪ Failure is inevitable, but your user’s don’t need to know ▪ Circuit breakers can help an application function in the face of failure ▪ Netflix Hystrix

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!14 Tracing ▪ A single request to get data from your application may result in an exponentially large number of requests to various microservices ▪ Tracing these requests through the application is critical when debugging issues ▪ Spring Cloud Sleuth and Zipkin

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!15 CI Pipelines and Testing ▪ Building, testing, and deploying the various services is critical to having a successful cloud native application ▪ Spring Cloud Pipelines is an opinionated pipeline for Jenkins or Concourse that will automatically create pipelines for your apps ▪ Spring Cloud Contract allows you to accurately mock dependencies between services using published contracts

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!16 DEMO

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!17 Q&A Spring Cloud Homepage: http://projects.spring.io/spring-cloud/ GitHub: https://github.com/spring-cloud Samples: https://github.com/spring-cloud-samples Twitter: https://twitter.com/springcloud Ryan Baxter Homepage: http://ryanjbaxter.com GitHub: http://github.com/ryanjbaxter Twitter: http://twitter.com/ryanjbaxter