[release-1.13] Fix hami vGPU scheduling failure in large and medium-scale clusters

[Copilot]

Cherry-picks the vGPU scheduling fix from master into release-1.13 by removing the scheduler/device-plugin handshake path and relying on node allocatable resources instead. This aligns release behavior with the upstream fix for large/medium cluster vGPU scheduling failures.

• Config cleanup

  • Removed obsolete VolcanoVGPUHandshake constant from pkg/scheduler/api/devices/config/vgpu.go.

• Scheduler device discovery logic

  • Updated NewGPUDevices in pkg/scheduler/api/devices/nvidia/vgpu/device_info.go to:
    • stop reading/modifying volcano.sh/node-vgpu-handshake
    • require non-zero allocatable values for:
      • volcano.sh/vgpu-number
      • volcano.sh/vgpu-cores
      • volcano.sh/vgpu-memory
    • return early when allocatable data is missing or invalid.

• Unit coverage updates

  • Added table-driven cases in pkg/scheduler/api/devices/nvidia/vgpu/device_info_test.go for allocatable gating behavior (missing/zero resources vs valid resource set).

gpuNumberRes, gpuNumberExists := node.Status.Allocatable[v1.ResourceName(deviceconfig.VolcanoVGPUNumber)]
if !gpuNumberExists || gpuNumberRes.Value() == 0 {
    return nil
}

[volcano-sh-bot]

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