Apache OpenWhisk - KRnet 2017
- 1. © 2017 IBM Corporation l Interconnect 2017 IBM Bluemix Apache OpenWhisk Building serverless applications with Apache OpenWhisk Jin Gi KONG Bluemix Technical Evangelist, IBM
- 2. IBM Bluemix Apache OpenWhisk Increasingfocusonbusinesslogic Decreasing concern (and control) over stack implementation Bare Metal VM VM VM Virtual machines Functions Containers Serverless developers focus more on code, less on infrastructure
- 3. IBM Bluemix Apache OpenWhisk Monolithic Application Break-down into microservices Make each microservice HA Protect against regional outage Region A Region B Microservices can be hard to manage at scale
- 4. IBM Bluemix Apache OpenWhisk Emerging workloads are a good fit for event-driven programming Execute logic in response to database change Perform analytics on sensor input messages Provide cognitive computing via chatbots Schedule tasks performed for a short time Invoke autoscaled APIs and mobile backends
- 5. IBM Bluemix Apache OpenWhisk Memory allocated (MB) Time executing (milliseconds) Instances executing simultaneously (count) Cloud resource cost better matches business value gained Not a silver bullet, but this can result in substantial savings for many workloads New cost models more accurately charge for usage
- 6. IBM Bluemix Apache OpenWhisk OpenWhisk is a cloud platform that executes code in response to events OpenWhisk enables these serverless, event-driven workloads Provides serverless deployment and operations model Runs code only on-demand on a per-request basis Optimized utilization, fine-grained metering at any scale Flexible, extensible, polyglot programming model Open source and open ecosystem (Apache Incubator) Ability to run in public, private, and hybrid models
- 7. IBM Bluemix Apache OpenWhisk Results Developers work with packages, triggers, actions, and rules Package (feed) Packages provide integration with external event sources P Trigger (event) T Data sources define events they emit as Triggers Rule (map)R Action (function) A Developers map Actions to Triggers via Rules
- 8. IBM Bluemix Apache OpenWhisk Apache Incubator OpenWhisk is built on solid open source foundations
- 9. IBM Bluemix Apache OpenWhisk Bluemix provides management, tooling, and monitoring
- 10. IBM Bluemix Apache OpenWhisk Bluemix provides management, tooling, and monitoring
- 11. IBM Bluemix Apache OpenWhisk Bluemix provides management, tooling, and monitoring
- 12. IBM Bluemix Apache OpenWhisk Sign up for an account at bluemix.net, then download CLI
- 13. © 2017 IBM Corporation l Interconnect 2017 IBM Bluemix Apache OpenWhisk programming model
- 14. IBM Bluemix Apache OpenWhisk Developers work with triggers, actions, rules, and packages Data sources define events they emit as Triggers. Developers map Actions to Triggers via Rules. Packages provide integration with external services. T A P R
- 15. IBM Bluemix Apache OpenWhisk Triggers A class of events that can occurT Social events Data changes Device readings Location updates User input
- 16. IBM Bluemix Apache OpenWhisk Actions Code that runs in response to an event (that is, an event handler) A
- 17. IBM Bluemix Apache OpenWhisk Actions Can be written in a variety of languages, such as JavaScript, Python, Java, and Swift A function main(params) { return { message: 'Hello, ' + params.name + ' from ' + params.place }; };
- 18. IBM Bluemix Apache OpenWhisk Actions Or any other language by packaging with DockerA
- 19. IBM Bluemix Apache OpenWhisk Actions Can be composed to create sequences that increase flexibility and foster reuse A AA := A1 + A2 + A3 AB := A2 + A1 + A3 AC := A3 + A1 + A2
- 20. IBM Bluemix Apache OpenWhisk Rules An association of a trigger to an action in a many to many mapping. R R := T A
- 21. IBM Bluemix Apache OpenWhisk Packages A shared collection of triggers and actionsP A A read write T changes A translate A forecast A post T topic Open Source A myAction T myFeed Yours T commit Third Party
- 22. © 2017 IBM Corporation l Interconnect 2017 IBM Bluemix Apache OpenWhisk in action
- 23. IBM Bluemix Apache OpenWhisk The OpenWhisk execution model Pool of actions Swift DockerJS Trigger 1 Running action Running action Running action 3 OpenWhisk Engine 2 A T AAA
- 24. IBM Bluemix Apache OpenWhisk Demo 1: Your first trigger, action, and rule $ wsk action create handler handler.js github.com/IBM/openwhisk-action-trigger-rule $ wsk action invoke --blocking handler $ wsk trigger create every-20-seconds --feed /whisk.system/alarms/alarm --param cron "*/20 * * * * *" --param maxTriggers 30 $ wsk action invoke --blocking handler $ wsk rule create invoke-periodically every-20-seconds handler Trigger 1 Running action 2 T A 1. Cron syntax alarm 2. Log the current time
- 25. IBM Bluemix Apache OpenWhisk Demo 2: Database change triggered action github.com/IBM/openwhisk-cloudant-trigger
- 26. IBM Bluemix Apache OpenWhisk Demo 3: HTTP API request triggered action github.com/IBM/openwhisk-rest-api-trigger
- 27. IBM Bluemix Apache OpenWhisk Other sample applications github.com/openwhisk/awesome-openwhisk Project OpenFridge: Improving customer service with event driven IoT Project OpenChecks github.com/openwhisk/awesome-openwhisk
- 28. IBM Bluemix Apache OpenWhisk Managed service on IBM Bluemix bluemix.net/openwhisk Delivered as Open source via Apache openwhisk.org Get started on Bluemix, or explore the open source project github.com/openwhisk slack.openwhisk.org twitter.com/openwhisk medium.com/openwhisk
- 29. IBM Bluemix Apache OpenWhisk See more sample apps on GitHub github.com/ibm Reach out to us team developer.ibm.com/kr Or, work with an IBM Code developer advocate