Lambda Layer Basic

📦 Overview

This Terraform module provisions a basic AWS Lambda Layer, enabling code and dependency sharing across multiple Lambda functions. It helps you reduce duplication, improve modularity, and manage function sizes effectively.

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✅ Key Features

• Creates a Lambda Layer with versioning
• Accepts source archive from S3
• Supports compatible runtime declarations
• Tags for environment tracking and ownership

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💼 Use Cases

• Share Python or Node.js libraries across functions
• Separate common logic from individual Lambda code
• Maintain versioned dependencies across environments
• Enable DRY (Don't Repeat Yourself) architecture

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📥 Input Variables

Name	Type	Description
region	string	AWS region to deploy the Lambda Layer
layer_name	string	Logical name for the Lambda Layer
s3_bucket	string	Name of the S3 bucket containing the zipped layer package
s3_key	string	Path to the ZIP file inside the S3 bucket
compatible_runtimes	list(string)	List of compatible Lambda runtimes (e.g., ["python3.11"])
environment	string	Tag value for environment (e.g., dev, staging, prod)

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📤 Outputs

Name	Description
layer_name	The name of the created Lambda Layer
layer_arn	The ARN of the Lambda Layer version

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🚀 Deployment Readiness

• ✅ Terraform 1.0+ compatible
• ✅ Uses AWS Provider 5.x+
• ☁️ Requires lambda:PublishLayerVersion permissions
• 📦 Zipped archive must be pre-uploaded to S3

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🛠️ Example Usage

module "lambda_layer_basic_deployment" {
  source              = "git::ssh://git@github.com/archiphire/aws-level-1-modules.git//compute/lambda-layer-basic?ref=v1.0.0"

  region              = "us-east-1"
  layer_name          = "my-shared-layer"
  s3_bucket           = "my-layer-artifacts"
  s3_key              = "layers/shared-lib.zip"
  compatible_runtimes = ["nodejs18.x"]
  environment         = "dev"
}

terraform init
terraform plan
terraform apply

or

tofu init
tofu plan
tofu apply

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🧹 Cleanup

Terraform Destroy (Isolated Use):

terraform destroy

or

tofu destroy

Manual Deletion (Recommended for Production):

• Detach from functions before deletion
• Use AWS Console or CLI to delete the layer version

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🛡️ Notes

This is a Level 1 compute module designed for reusable Lambda architecture.
For attaching layers to Lambda functions automatically, use this module with other Archiphire deployment patterns.

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🔒 Deployment Package Notice

This module is part of the Level 1 AWS License Tier.
To access the full deployment package and source code, subscribe to Archiphire.