Building Serverless Applications on the Apache OpenWhisk Platform
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IBM Bluemix Apache OpenWhisk is a cloud platform designed for serverless, event-driven programming, allowing developers to execute code in response to events without server management concerns. It provides a flexible programming model involving packages, triggers, actions, and rules, which can be used for various applications such as chatbots and analytics. OpenWhisk is open-source and supports public, private, and hybrid cloud deployments, enabling better cost management by charging for actual resource usage.
Building Serverless Applications on the Apache OpenWhisk Platform
- 1. © 2017 IBM Corporation l Interconnect 2017 IBM Bluemix Apache OpenWhisk Building serverless applications with Apache OpenWhisk @Joe_Sepi Joe Sepi Developer Advocate, IBM
- 2. IBM Bluemix Apache OpenWhisk@Joe_Sepi 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@Joe_Sepi 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@Joe_Sepi 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@Joe_Sepi 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@Joe_Sepi 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@Joe_Sepi 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@Joe_Sepi Apache Incubator OpenWhisk is built on solid open source foundations
- 9. IBM Bluemix Apache OpenWhisk@Joe_Sepi Bluemix provides management, tooling, and monitoring
- 10. IBM Bluemix Apache OpenWhisk@Joe_Sepi Bluemix provides management, tooling, and monitoring
- 11. IBM Bluemix Apache OpenWhisk@Joe_Sepi Bluemix provides management, tooling, and monitoring
- 12. IBM Bluemix Apache OpenWhisk@Joe_Sepi 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@Joe_Sepi 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@Joe_Sepi Triggers A class of events that can occurT Social events Data changes Device readings Location updates User input
- 16. IBM Bluemix Apache OpenWhisk@Joe_Sepi Actions Code that runs in response to an event (that is, an event handler) A
- 17. IBM Bluemix Apache OpenWhisk@Joe_Sepi 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@Joe_Sepi Actions Or any other language by packaging with DockerA
- 19. IBM Bluemix Apache OpenWhisk@Joe_Sepi 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@Joe_Sepi Rules An association of a trigger to an action in a many to many mapping. R R := T A
- 21. IBM Bluemix Apache OpenWhisk@Joe_Sepi 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@Joe_Sepi Bluemix Interface
- 24. IBM Bluemix Apache OpenWhisk@Joe_Sepi The OpenWhisk execution model Pool of actions Swift DockerJS Trigger 1 Running action Running action Running action 3 OpenWhisk Engine 2 A T AAA
- 25. IBM Bluemix Apache OpenWhisk@Joe_Sepi 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
- 26. IBM Bluemix Apache OpenWhisk@Joe_Sepi Demo 2: Database change triggered action github.com/IBM/openwhisk-cloudant-trigger
- 27. IBM Bluemix Apache OpenWhisk@Joe_Sepi Demo 3: HTTP API request triggered action github.com/IBM/openwhisk-rest-api-trigger
- 28. IBM Bluemix Apache OpenWhisk@Joe_Sepi Other sample applications github.com/openwhisk/awesome-openwhisk Project OpenFridge: Improving customer service with event driven IoT Project OpenChecks github.com/openwhisk/awesome-openwhisk github.com/apache/incubator-openwhisk-external-resources
- 29. IBM Bluemix Apache OpenWhisk@Joe_Sepi 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
- 30. IBM Bluemix Apache OpenWhisk@Joe_Sepi See more sample apps on GitHub github.com/ibm Reach out to us team developer.ibm.com/code/work-with-us Or, work with an IBM Code developer advocate
- 31. © 2017 IBM Corporation l Interconnect 2017 IBM Bluemix Apache OpenWhisk Building serverless applications with Apache OpenWhisk @Joe_Sepi Joe Sepi Developer Advocate, IBM