Describe the feature

The g7e instance family (NVIDIA Blackwell B200) is not recognized as a GPU instance type in CDK. Attempting to create an EKS managed nodegroup with a g7e instance and ami_type=AL2023_X86_64_NVIDIA fails because:

1. g7e is absent from the InstanceClass enum in aws-ec2/lib/instance-types.ts — there is no G7E / GRAPHICS7_EFFICIENT entry.
2. isGpuInstanceType() in aws-eks/lib/private/nodegroup.ts has a hardcoded allowlist that includes G6E but not G7E, so CDK rejects the AMI type as incompatible with the instance.

Use Case

I want to be able to create GPU nodegroups with the newer g7e instance types.

Proposed Solution

I believe the change should be to add g7e to both places, following the same pattern used for g6e:

1. In aws-ec2/lib/instance-types.ts:
   GRAPHICS7_EFFICIENT = 'g7e',
   G7E = GRAPHICS7_EFFICIENT,
2. In aws-eks/lib/private/nodegroup.ts, add InstanceClass.G7E to the knownGpuInstanceTypes array in isGpuInstanceType().

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

AWS CDK Library version (aws-cdk-lib)

2.253.0

AWS CDK CLI version

2.1121.0

Environment details (OS name and version, etc.)

Linux (Ubuntu 6.17.0-22-generic), Python 3.12, Node.js v20.12.2, aws-cdk-lib 2.253.0, CDK CLI 2.1121.0