Why serverless?

• No infrastructure to manage!
• Theoretically near-infinite scaling
• Potential cost savings
• Fewer moving parts

Serverless providers available

• AWS Lambda
  • supports Java/Node/Python
• Azure Functions
  • supports C#/F#/Javascript/Python/PHP/Powershell/Bash...
    and Batch?!?!
• Google Cloud Functions, Iron.io, OpenWhisk, etc 

But today, we're going to focus on AWS Lambda

'cause it's what Zappa supports

What's Zappa?

• Small Python framework that assists in deploying your Flask or Django application (or any WSGI-based application) into AWS Lambda
  • Uses CloudFormation templates to create a "stack" in AWS complete with API Gateway and Lambda function
  • Highly-configurable in terms of additional components:
    • Arbitrary function execution scheduler
    • SSL certificate creation (using Let's Encrypt)
    • API key generation for API Gateway

More @ https://github.com/Miserlou/Zappa

A simple demo API

• Using Flask

> zappa init
> zappa deploy

What's going on?

1) Zappa packages your code and uploads to an S3 bucket

2) Apply infrastructure (CloudFormation) template

• Creates API Gateway endpoints
• Creates Lambda functions from your code

3) And...we're live