support EC2 warm pools for EKS managed node groups

[maximeroma]

Is your request related to a new offering from AWS?

Yes ✅

This request is related to the recent AWS announcement introducing EKS Managed Node Groups EC2 Warm Pools:
https://aws.amazon.com/fr/about-aws/whats-new/2026/04/amazon-eks-managed-node-groups-ec2-warm-pools/

⚠️ At the time of writing, this functionality is not yet available in the AWS Terraform provider.
Tracking issue: hashicorp/terraform-provider-aws#47389

This feature request is blocked until it is implemented in the provider.

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Is your request related to a problem? Please describe.

When using EKS managed node groups, scaling events can introduce latency due to instance provisioning time.

AWS recently introduced EC2 Warm Pools for EKS Managed Node Groups, which significantly reduces scale-up time by keeping pre-initialized instances ready.

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Describe the solution you'd like.

Add support for configuring EC2 Warm Pools in EKS Managed Node Groups within the module, once it is supported by the AWS Terraform provider.

This would likely include:

• New input variables to configure warm pool settings (e.g., min/max size, pool state, reuse policy, etc.)
• Integration within eks_managed_node_groups
• Proper defaults to maintain backward compatibility

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Additional context

This feature request is forward-looking and should be implemented once the AWS provider supports it.

Tracking upstream dependency:
hashicorp/terraform-provider-aws#47389

AWS announcement:
https://aws.amazon.com/fr/about-aws/whats-new/2026/04/amazon-eks-managed-node-groups-ec2-warm-pools/

[github-actions]

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[maximeroma]

not stale