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Streamlining EC2 Updates by Automating AMI Swaps

Migration and Modernization Blog



The article discusses an automated solution for streamlining Amazon EC2 updates by automating Amazon Machine Image (AMI) swaps using AWS Step Functions and AWS Backup.

  • Automates AMI updates for Auto Scaling Groups (ASGs)
  • Uses six Lambda functions to manage the update process
  • Key steps include:
    • Retrieving ASG and launch template details
    • Preparing instances with Sysprep
    • Updating ASG with new AMI
    • Performing status checks
    • Cleaning up resources
  • Leverages AWS EventBridge to trigger the workflow on AWS Backup job completion
  • Provides a serverless, cost-efficient approach to infrastructure management

The solution aims to reduce manual intervention, minimize human error, and ensure Auto Scaling Groups consistently use the most up-to-date machine images.



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