Cloud Native Applications for Cloud Foundry using Spring Cloud Workshop Corneil du Plessis 

Agenda • Background • Cloud Foundry command-line • Your frst Cloud Foundry application • Connecting to database • Connecting to message queues • Scaling your application • Application Discovery 

Background • What is Cloud Foundry? • Application Runtime • Container Runtime • Who provides Cloud Foundry Application Runtime? • Atos • Cloud.gov • Fujitsu Cloud Service K5 • Huawei FusionStage • IBM Bluemix • Pivotal Cloud Foundry • SAP Cloud Platform • Suse Cloud Application Platform • Swisscom Application Cloud • Who uses Cloud Foundry? • Governments • Banks • Insurance • Telecomms • Airlines • Retail (Online) • Retail (Bricks and mortar) • Aerospace https://www.cloudfoundry.org/case-stud ies/ 

Cloud Foundry Application Runtime 

Terminology • CAT • BOSCH • Deigo • Services • Application Manifest • Organisation • Space • Buildpack 

Cloud Foundry Buildpacks • Binary • Go • Java • .Net Core • Node.js • PHP • Python • Ruby • Staticfle • NGIX • HWC (Hosted Web Core) • Community • TomEE • WebSphere Liberty • Jetty • Erlang • Haskell • Swift 

The 12 Factors https://12factor.net 1. One Codebase in revision control 2. Dependencies must be explicit 3. Confg in environment 4. Backing services as attached resources 5. Build, release, run as separate stages 6. One or more stateless processes 7. Export services via port binding 8. Concurrency in Process over threads 9. Disposable with quick startup and graceful shutdown. 10. Keep development/test/production in parity 11. Treat logs as event streams 12. Admin/management tasks as one-of processes 

Cloud Foundry command-line • cf login • cf push • cf marketplace • cf create-service • cf bind-service • cf scale • cf restart • Many Plugins • Authenticate Operator • Deploy Application • List services • Create / Provision a service • Bind service to application • Scale application • Restart the application 

Visit Workshop Page https://github.com/corneil/cf-demo 

Your frst Application 

View Logs and Invoke 

Connecting to Database • Create Spring Data Repository. • Update EventServiceImpl to use the repository. • Add @Configuration extending AbstractCloudConfig to provide @Bean of type DataSource. • Add @Transactional to Controller to preserve the Stream 

Provision PostgreSQL and Deploy 

Connecting to Message Queues • Create @Bean for RabbitMQ ConnectionFactory by extending AbstractCloudConfig. • Create @Bean for Queue. • Implement listener method with @RabbitListener that saves Event using repository. • Modify createEvent to send event to message queue using AmqpTemplate. 

Provision RabbitMQ and Deploy 

Scaling your application 

Application Discovery • @EnableDiscoveryClient • Access resources: • https:/// • OpenFeign Client 

Cloud Foundry Plugins • Maven Push https://github.com/ftzoh/maven-push-plugin • Java https://github.com/SAP/cf-cli-java-plugin • Spring Cloud Services https://github.com/pivotal-cf/spring-cloud-services-cli-plu gin • Spring Cloud Data Flow for PCF https://github.com/pivotal-cf/spring-cloud-datafow-for-pcf -cli-plugin • Zero downtime deployments https://github.com/bluemixgaragelondon/cf-blue-green-de 

Finally • Contact: @corneil • Code: https://github.com/corneil/cf-demo • Resources: • https://docs.cloudfoundry.org/buildpacks/java/getting-started-deploying-apps/gsg-spring.html • https://docs.cloudfoundry.org/buildpacks/java/confguring-service-connections/spring-service-bindings.html • https://docs.spring.io/spring-cloud/docs/current/api/org/springframework/cloud/confg/java/AbstractCloudCo nfg.html 

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