aws / karpenter-provider-aws / 29053277419

Pull #9322

github

feat: support fractional GPU instances (g6f) using LogicalGpuCount

Fractional GPU instances (e.g., g6f family) expose a physical GPU
partition as a logical GPU via the EC2 DescribeInstanceTypes
LogicalGpuCount field. This change adds support in Karpenter:

- Add karpenter.k8s.aws/instance-gpu-fractional well-known label
  ("true" when GpuPartitionSize < 1.0, "false" when == 1.0, absent
  when GpuPartitionSize is not set)
- Use LogicalGpuCount (when available) for both capacity reporting
  in nvidiaGPUs() and the instance-gpu-count scheduling requirement,
  falling back to Count when LogicalGpuCount is nil
- Update CRD CEL allowlists and hack/validation scripts for the new label
- Add unit tests covering all three GpuPartitionSize branches
- Add integration tests for g6f scheduling and NotIn-true filtering
- Update website documentation with the new label

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