cloud-aws-lambda

Overview

Provides guidance on building and deploying AWS Lambda functions, configuring triggers, and mastering serverless development. It helps you create scalable, event-driven code without managing servers.

How This Skill Works

Code is packaged and uploaded to Lambda with a handler that processes events. You configure runtime, memory, and timeout, and attach triggers like API Gateway, S3, or CloudWatch; AWS executes and scales your function automatically.

When to Use It

• When you need to run code in response to AWS events (e.g., S3 uploads, API calls) without provisioning servers
• When building serverless APIs with API Gateway backed by Lambda
• When you want scheduled tasks using EventBridge/CloudWatch Events
• When handling real-time data processing from streams like Kinesis or DynamoDB
• When migrating monolithic workloads to modular serverless functions for cost and agility

Quick Start

1. Step 1: Set up your AWS account/credentials (CLI or Console)
2. Step 2: Create a Lambda function (choose runtime, write a handler)
3. Step 3: Add a trigger (API Gateway, S3, or EventBridge), configure basic settings, and test with a sample event

Best Practices

• Define least-privilege IAM roles for each Lambda function
• Keep functions small and single-purpose; minimize dependencies
• Use environment variables and AWS Secrets Manager for configuration and secrets
• Instrument with CloudWatch (logs, metrics) and enable X-Ray tracing
• Use versioning and aliases with canary deployments and proper monitoring

Example Use Cases

• Resize and optimize images on S3 upload with a Lambda trigger
• Expose a REST API with API Gateway backed by Lambda
• Process streaming data from Kinesis in real time
• Run a daily data ETL job with EventBridge (CloudWatch Events) trigger
• Automate thumbnail generation and metadata extraction after media upload

Frequently Asked Questions