1) Apache OpenWhisk is an open source serverless computing platform that allows executing code in response to events from web/mobile apps without provisioning servers or resources. 2) OpenWhisk uses a programming model where services define triggers as events emitted, developers associate actions to handle the events via rules, and the system handles executing the code. 3) A demo was presented exploring OpenWhisk through IBM Cloud Functions, a hosted service on IBM Bluemix that allows running functions in response to various events from databases, object storage, and other triggers.

1. Getting Started with
Apache OpenWhisk
Janakiram MSV
janakiram.com
Tech Talk Webinar Show

2. Agenda
• What is Serverless Computing?
• Introduction to Apache OpenWhisk
• Deployment Models
• OpenWhisk on Bluemix

3. The Four Waves of Computing
x86 Servers1
Virtualization2
Containerization3
Serverless Computing4

4. Serverless Computing
• Emphasis on code snippets than servers or
platforms
• Execute code without the need to provision
resources
• Function as a fundamental unit of deployment
• Functions as a Service (FaaS)

5. Serverless Market Landscape
(Public Cloud)
AWS
Lambda
Azure
Functions
Google Cloud
Functions
IBM Cloud
Functions

6. Three Attributes of Serverless
1. Event driven computing model
2. Pay-per execution pricing model
3. Transparent resource allocation
through infrastructure abstraction

7. What is OpenWhisk?
• Originally developed at IBM as a part of Bluemix
portfolio
• Donated to Apache Foundation
• Currently an incubation project at Apache
• One of the most mature open source FaaS projects
• Commercially available as IBM Cloud Functions, a
hosted service on Bluemix
• Integrated with core building blocks of Bluemix

8. What is OpenWhisk?
• Runs functions in response to events from web or
mobile apps
• Functions can be directly invoked via HTTP
• Code executes in response to
• HTTP call
• Database state change
• File uploaded to object storage
• Many other event triggers…

9. OpenWhisk Architecture

10. OpenWhisk Programming Model
• Services define the events they emit as triggers, and developers
associate the actions to handle the events via rules
• The developer only needs to care about implementing the desired
application logic - the system handles the rest
T A R

11. Programming Model - Trigger
A class of events belonging to an application

12. Programming Model - Actions
An event-handler that responds to an event

13. Programming Model - Rules
An association of Trigger and Actions

14. OpenWhisk Workflow

15. OpenWhisk Language Support

16. Demo
Exploring OpenWhisk through
IBM Cloud Functions

17. Thank You!
Janakiram MSV
janakiram.com