AWS SAM

ELI5 — The Vibe Check

SAM is CloudFormation's serverless-focused little sibling. Instead of writing 200 lines of YAML to deploy a Lambda, you write 20. It extends CloudFormation with shortcuts specifically for serverless apps — functions, APIs, event sources. Think of it as CloudFormation with training wheels that actually make you go faster.

Real Talk

AWS Serverless Application Model (SAM) is an open-source framework for building serverless applications. It extends CloudFormation with simplified syntax for defining Lambda functions, API Gateway APIs, and DynamoDB tables. The SAM CLI provides local testing, debugging, and deployment capabilities.

Show Me The Code

# template.yaml
AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31

Resources:
  MyFunction:
    Type: AWS::Serverless::Function
    Properties:
      Handler: app.handler
      Runtime: nodejs20.x
      Events:
        Api:
          Type: Api
          Properties:
            Path: /hello
            Method: get

When You'll Hear This

"SAM local lets us test Lambda functions on our machine before deploying." / "Our serverless stack is defined in a SAM template."