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© 2017 IBM Corporation l Interconnect 2017
IBM Bluemix

Apache
OpenWhisk
Building serverless applications
with Apache OpenWhisk
@DanielKrook
Daniel Krook

Software Architect, IBM
IBM Bluemix Apache OpenWhisk@DanielKrook
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
IBM Bluemix Apache OpenWhisk@DanielKrook
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
IBM Bluemix Apache OpenWhisk@DanielKrook
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
IBM Bluemix Apache OpenWhisk@DanielKrook
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
IBM Bluemix Apache OpenWhisk@DanielKrook
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
IBM Bluemix Apache OpenWhisk@DanielKrook
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
IBM Bluemix Apache OpenWhisk@DanielKrook
Apache
Incubator
OpenWhisk is built on solid open source foundations
IBM Bluemix Apache OpenWhisk@DanielKrook
Bluemix provides management, tooling, and monitoring
IBM Bluemix Apache OpenWhisk@DanielKrook
Bluemix provides management, tooling, and monitoring
IBM Bluemix Apache OpenWhisk@DanielKrook
Bluemix provides management, tooling, and monitoring
IBM Bluemix Apache OpenWhisk@DanielKrook
Sign up for an account at bluemix.net, then download CLI
© 2017 IBM Corporation l Interconnect 2017
IBM Bluemix
Apache OpenWhisk programming model
IBM Bluemix Apache OpenWhisk@DanielKrook
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
IBM Bluemix Apache OpenWhisk@DanielKrook
Triggers
A class of events that can occurT
Social events
Data changes
Device readings Location updates
User input
IBM Bluemix Apache OpenWhisk@DanielKrook
Actions
Code that runs in response to an event
(that is, an event handler)
A
IBM Bluemix Apache OpenWhisk@DanielKrook
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 };
};
IBM Bluemix Apache OpenWhisk@DanielKrook
Actions
Or any other language by packaging with DockerA
IBM Bluemix Apache OpenWhisk@DanielKrook
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
IBM Bluemix Apache OpenWhisk@DanielKrook
Rules
An association of a trigger to an action
in a many to many mapping.
R
R := T A
IBM Bluemix Apache OpenWhisk@DanielKrook
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
© 2017 IBM Corporation l Interconnect 2017
IBM Bluemix
Apache OpenWhisk in action
IBM Bluemix Apache OpenWhisk@DanielKrook
The OpenWhisk execution model
Pool of actions
Swift DockerJS
Trigger
1
Running
action
Running
action
Running
action
3
OpenWhisk
Engine
2 A
T
AAA
IBM Bluemix Apache OpenWhisk@DanielKrook
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
IBM Bluemix Apache OpenWhisk@DanielKrook
Demo 2: Database change triggered action
github.com/IBM/openwhisk-cloudant-trigger
IBM Bluemix Apache OpenWhisk@DanielKrook
Demo 3: HTTP API request triggered action
github.com/IBM/openwhisk-rest-api-trigger
IBM Bluemix Apache OpenWhisk@DanielKrook
Other sample applications
github.com/openwhisk/awesome-openwhisk
Project OpenFridge:
Improving customer service
with event driven IoT
Project OpenChecks
github.com/openwhisk/awesome-openwhisk
IBM Bluemix Apache OpenWhisk@DanielKrook
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
IBM Bluemix Apache OpenWhisk@DanielKrook
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

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Building serverless applications with Apache OpenWhisk

  • 1. © 2017 IBM Corporation l Interconnect 2017 IBM Bluemix Apache OpenWhisk Building serverless applications with Apache OpenWhisk @DanielKrook Daniel Krook Software Architect, IBM
  • 2. IBM Bluemix Apache OpenWhisk@DanielKrook 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@DanielKrook 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@DanielKrook 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@DanielKrook 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@DanielKrook 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@DanielKrook 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@DanielKrook Apache Incubator OpenWhisk is built on solid open source foundations
  • 9. IBM Bluemix Apache OpenWhisk@DanielKrook Bluemix provides management, tooling, and monitoring
  • 10. IBM Bluemix Apache OpenWhisk@DanielKrook Bluemix provides management, tooling, and monitoring
  • 11. IBM Bluemix Apache OpenWhisk@DanielKrook Bluemix provides management, tooling, and monitoring
  • 12. IBM Bluemix Apache OpenWhisk@DanielKrook 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@DanielKrook 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@DanielKrook Triggers A class of events that can occurT Social events Data changes Device readings Location updates User input
  • 16. IBM Bluemix Apache OpenWhisk@DanielKrook Actions Code that runs in response to an event (that is, an event handler) A
  • 17. IBM Bluemix Apache OpenWhisk@DanielKrook 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@DanielKrook Actions Or any other language by packaging with DockerA
  • 19. IBM Bluemix Apache OpenWhisk@DanielKrook 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@DanielKrook Rules An association of a trigger to an action in a many to many mapping. R R := T A
  • 21. IBM Bluemix Apache OpenWhisk@DanielKrook 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@DanielKrook 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@DanielKrook 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@DanielKrook Demo 2: Database change triggered action github.com/IBM/openwhisk-cloudant-trigger
  • 26. IBM Bluemix Apache OpenWhisk@DanielKrook Demo 3: HTTP API request triggered action github.com/IBM/openwhisk-rest-api-trigger
  • 27. IBM Bluemix Apache OpenWhisk@DanielKrook 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@DanielKrook 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@DanielKrook 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