EKS node groups on Amazon Linux 2 AMIs — unsupported since Nov 26, 2025

AWSDeprecations & retirementsTeam planSeverity: highaws.eks-nodegroup

EKS managed node groups using AL2_x86_64, AL2_x86_64_GPU or AL2_ARM_64; EKS AL2 AMIs lost support on November 26, 2025 and no AL2 AMIs exist for Kubernetes 1.33+

What LeftSize checks

Find EKS managed node groups that still use an Amazon Linux 2 AMI type (AL2_x86_64, AL2_x86_64_GPU, AL2_ARM_64).

Why it matters

Missed retirement and end-of-support dates turn into forced upgrades, outages or extended support charges at a moment you did not choose.

What you get in the GitHub issue

LeftSize runs this check from a scheduled GitHub Action with a read-only identity in your AWS account and opens one issue per scope, updated on every scan. The issue includes:

  • The affected resources, grouped per subscription, resource group or account and region
  • Background on why it was flagged and when it is a false positive
  • Cost and operational impact of fixing it
  • Step-by-step remediation with safety checks
  • Ready-to-run fix scripts (CLI, PowerShell or Terraform where available)
  • Alternative approaches and their trade-offs
  • Snooze, ignore or report a finding with a comment on the issue
Install LeftSizeIncluded in the Team and Business plans.

Official references