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Automating AL2023 custom hardened AMI updates for Amazon EKS managed nodes

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This article discusses an automated solution for updating Amazon EKS managed node groups with custom, hardened Amazon Linux 2023 AMIs that meet CIS Benchmark Level 2 security standards.

  • Addresses the need for regulatory compliance in industries like financial services, healthcare, and government
  • Provides an automated pipeline to build, deploy, and validate custom AMIs
  • Reduces AMI update process from 3-4 days to approximately 50 minutes
  • Uses AWS services like EventBridge, Lambda, EC2 Image Builder, and CodeBuild
  • Implements an automated workflow that: - Checks for new AMI releases - Creates custom hardened AMIs - Updates staging and production EKS clusters - Tests applications after updates - Sends notifications about the update process

The solution helps organizations improve security, reduce operational overhead, and maintain compliance with minimal manual intervention.



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