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aws-lambda-scripts

Python scripts using AWS boto3 to automatically stop EC2 instances on a schedule, deployed as AWS Lambda functions with CloudWatch cron triggers.

What It Does

Automates EC2 instance shutdown to reduce AWS costs by stopping instances when they are not needed (e.g. outside business hours). Configured with a cron job in AWS Console (CloudWatch Events / EventBridge).

Tech Stack

Tool Purpose
Python Core language
AWS boto3 AWS SDK — interact with EC2
AWS Lambda Serverless function runtime
AWS CloudWatch Events Cron-based scheduling trigger
AWS EC2 Compute instances being managed

Key Concepts

  • Using boto3.client("ec2") to programmatically stop instances
  • Filtering instances by tag or instance ID
  • Lambda handler pattern: def lambda_handler(event, context)
  • Scheduling via CloudWatch Events cron expression (e.g. cron(0 18 * * ? *) = 6pm daily)

Files

File Description
aws scripts.py Lambda function to stop EC2 instances
README.md Documentation

How to Deploy

  1. Zip aws scripts.py and upload to AWS Lambda
  2. Set the handler to aws scripts.lambda_handler
  3. Attach IAM role with ec2:StopInstances permission
  4. Add a CloudWatch Events trigger with your desired cron schedule

Skills Demonstrated

  • Cloud automation with Python and AWS SDK (boto3)
  • Serverless architecture with AWS Lambda
  • Cost optimisation through scheduled instance management
  • Infrastructure scripting applicable to DataOps and CloudOps workflows

Part of a broader data engineering portfolio — view more