Mixed AMI environments - Amazon Batch
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Mixed AMI environments

You can use launch template overrides to create compute environments with both Amazon Linux 2 (AL2) and Amazon Linux 2023 (AL2023) AMIs. This is useful for using different AMIs for different architectures or during migration periods when transitioning from AL2 to AL2023.

Note

Amazon will end support for Amazon EKS AL2-optimized and AL2-accelerated AMIs, starting 11/26/25. While you can continue using Amazon Batch-provided Amazon EKS optimized Amazon Linux 2 AMIs on your Amazon EKS compute environments beyond the 11/26/25 end-of-support date, these compute environments will no longer receive any new software updates, security patches, or bug fixes from Amazon. Mixed AMI environments can be useful during the transition period, allowing you to gradually migrate workloads to AL2023 while maintaining compatibility with existing AL2-based workloads.

Example configuration using both AMI types:

{
  "computeResources": {
    "launchTemplate": {
      "launchTemplateId": "TemplateId",
      "version": "1",
      "userdataType": "EKS_BOOTSTRAP_SH",
      "overrides": [
        {
          "instanceType": "c5.large",
          "imageId": "ami-al2-custom",
          "userdataType": "EKS_BOOTSTRAP_SH"
        },
        {
          "instanceType": "c6a.large",
          "imageId": "ami-al2023-custom",
          "userdataType": "EKS_NODEADM"
        }
      ]
    },
    "instanceTypes": ["c5.large", "c6a.large"]
  }
}