Getting Started with Apache OpenWhisk

Janakiram MSVjanakiram.com

Tech Talk Webinar Show

Agenda

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

The Four Waves of Computing

x86 Servers1

Virtualization2

Containerization3

Serverless Computing4

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)

Serverless Market Landscape (Public Cloud)

AWS Lambda

Azure Functions

Google Cloud Functions

IBM Cloud Functions

Three Attributes of Serverless

1. Event driven computing model

2. Pay-per execution pricing model

3. Transparent resource allocation through infrastructure abstraction

What is OpenWhisk?

• Originally developed at IBM as a part of Bluemixportfolio

• 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

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…

OpenWhisk Architecture

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

Programming Model - TriggerA class of events belonging to an application

Programming Model - ActionsAn event-handler that responds to an event

Programming Model - RulesAn association of Trigger and Actions

OpenWhisk Workflow

OpenWhisk Language Support

DemoExploring OpenWhisk through

IBM Cloud Functions

Thank You!

Janakiram MSVjanakiram.com