SAM - Serverless Application Model

Table of contents

• General

---

General

AWS SAM is a framework consisting of two parts: AWS SAM templates (YAML files) and the AWS SAM Command Line Interface (AWS SAM CLI). AWS SAM templates provide a short-hand syntax optimized for defining Infrastructure as Code (IaC) for serverless applications that will later be converted into CloudFormation templates.

AWS SAM also supports local development for Lambda, API Gateway, and DynamoDB.

The template must have the key Transform: ‘AWS::Serverless-2016-10-31’, and the resources are defined as AWS::Serverless::[SERVICE] where [SERVICE] can be Function for Lambda function, Api for API Gateway, or SimpleTable for DybamoDB Table.

For SAM deployment, run:

# 1. Convert SAM template to CloudFormation Template and organizes the files in the ".aws-sam" folder
aws cloudformation build

# 2. Deploy template, code, and create ClodFormation Change Set.
aws cloudformation deploy --guided

# Note: "aws sam" is a shortcut for "aws cloudformation".