Aws Lambda Functions

by aj-geddes3f5182cfd739No license355 starsListed Oct 8, 2026Updated Oct 8, 2026Repository updated 7 months ago

Create and deploy serverless functions using AWS Lambda with event sources, permissions, layers, and environment configuration. Use for event-driven computing without managing servers.

Includes scriptsDevOps & Cloud

AI-generated overview

Guides creating and deploying AWS Lambda serverless functions with CLI, Node.js, SAM, Terraform, and layers.

What it does: This skill provides reference guides and templates for building and deploying AWS Lambda serverless functions. It covers basic AWS CLI creation, Node.js handlers, Lambda Layers for shared code, SAM and Terraform deployment, plus permissions, event sources, and environment configuration. It also ships a validation script and an API scaffold template.
When to use it: Use it when you need to create, configure, or deploy AWS Lambda functions for event-driven workloads such as API endpoints, scheduled jobs, file processing, or microservices. It suits teams working with AWS CLI, SAM, or Terraform who want practical deployment patterns.
Requirements: Requires an AWS account with credentials and the AWS CLI; some guides also need Node.js, Terraform, or the AWS SAM CLI. Network access to AWS is needed, and the skill ships an executable validation script plus a YAML template.

Overview

AWS Lambda enables you to run code without provisioning or managing servers. Build serverless applications using event-driven triggers, pay only for compute time consumed, and scale automatically with workload.

When to Use

API endpoints and webhooks
Scheduled batch jobs and data processing
Real-time file processing (S3 uploads)
Event-driven workflows (SNS, SQS)
Microservices and backend APIs
Data transformations and ETL jobs
IoT and sensor data processing
WebSocket connections

Quick Start

Minimal working example:

bash

# Create Lambda execution roleaws iam create-role \  --role-name lambda-execution-role \  --assume-role-policy-document '{    "Version": "2012-10-17",    "Statement": [{      "Effect": "Allow",      "Principal": {"Service": "lambda.amazonaws.com"},      "Action": "sts:AssumeRole"    }]  }'
# Attach basic execution policyaws iam attach-role-policy \  --role-name lambda-execution-role \  --policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole
# Create function from ZIPzip function.zip index.jsaws lambda create-function \  --function-name my-function \  --runtime nodejs18.x \  --role arn:aws:iam::ACCOUNT:role/lambda-execution-role \  --handler index.handler \  --zip-file fileb://function.zip \// ... (see reference guides for full implementation)

# Create Lambda execution roleaws iam create-role \  --role-name lambda-execution-role \  --assume-role-policy-document '{    "Version": "2012-10-17",    "Statement": [{      "Effect": "Allow",      "Principal": {"Service": "lambda.amazonaws.com"},      "Action": "sts:AssumeRole"    }]  }'
# Attach basic execution policyaws iam attach-role-policy \  --role-name lambda-execution-role \  --policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole
# Create function from ZIPzip function.zip index.jsaws lambda create-function \  --function-name my-function \  --runtime nodejs18.x \  --role arn:aws:iam::ACCOUNT:role/lambda-execution-role \  --handler index.handler \  --zip-file fileb://function.zip \// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Guide	Contents
Basic Lambda Function with AWS CLI [blocked]	Basic Lambda Function with AWS CLI
Lambda Function with Node.js [blocked]	Lambda Function with Node.js
Terraform Lambda Deployment [blocked]	Terraform Lambda Deployment
Lambda with SAM (Serverless Application Model) [blocked]	Lambda with SAM (Serverless Application Model)
Lambda Layers for Code Sharing [blocked]	Lambda Layers for Code Sharing

Best Practices

✅ DO

Use environment variables for configuration
Implement proper error handling and logging
Optimize package size and dependencies
Set appropriate timeout and memory
Use Lambda Layers for shared code
Implement concurrency limits
Enable X-Ray tracing for debugging
Use reserved concurrency for critical functions

❌ DON'T

Store sensitive data in code
Create long-running operations (>15 min)
Ignore cold start optimization
Forget to handle concurrent executions
Ignore CloudWatch metrics
Use too much memory unnecessarily

Source and attribution

Source:aj-geddes/useful-ai-promptsinskills/aws-lambda-functionsat commit3f5182c

License: No license

Content belongs to its original authors. SourceWeft indexes it from a public repository.

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Aws Lambda Functions

AWS Lambda Functions

Table of Contents

Overview

When to Use

Quick Start

Reference Guides

Best Practices

✅ DO

❌ DON'T

Source and attribution

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