AWS SAM Lambda Function with Versioning and Aliases

Overview

This AWS Serverless Application Model (SAM) template sets up an AWS Lambda function with support for versioning and aliases. It helps manage different environments (development and production) by using Lambda versions and aliases.

Features

• Lambda Function: Defines a basic AWS Lambda function.
• Versioning: Optionally creates a new version of the Lambda function.
• Aliases: Creates prod and dev aliases to manage different environments.

Template Structure

The template includes:

• Parameters: Customize function creation and versioning.
• Conditions: Control version creation.
• Resources:
  • Lambda function
  • Lambda version (conditionally created)
  • prod alias (points to a specific version or the latest)
  • dev alias (always points to the latest version)

Parameters

• FunctionName

  • Type: String
  • Default: MyLambdaFunction
  • Description: The name of the Lambda function.

• CreateNewVersion

  • Type: String
  • Default: 'true'
  • AllowedValues: 'true', 'false'
  • Description: Determines if a new version of the Lambda function should be created.

• ProdAliasVersion

  • Type: String
  • Default: '$LATEST'
  • Description: Specifies the version of the Lambda function to which the prod alias should point if not creating a new version.

Usage

Prerequisites

• AWS CLI installed and configured.
• AWS SAM CLI installed.
• An S3 bucket for deploying Lambda code (if not using the default).

Steps to Deploy

1. Clone the repository

   git clone https://github.com/your-repo/lambda-sam-template.git
   cd lambda-sam-template
   

2. Build the project

   sam build
   

3. Deploy the stack

   sam deploy --guided
   

Contributing

If you have suggestions or improvements, please create a pull request or open an issue.