将讨论在 Kubernetes 上启用 GPU 时私有云所面临的三个主要挑战,我还将展示并讨论一些有助于解决这些挑战的项目:
1) 私有云通常需要支持更广泛的 GPU 类型,在某些情况下,需要在一个集群中支持异构 GPU。
2) 支持像 RDMA、NVLINK 等复杂的硬件拓扑。
3) 当多个团队共享的 GPU 资源有限时,GPU 资源的争用通常非常高。

ccone发布于2019/04/14

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1.Kubernetes loves machine learning on on-premise Hui Luo - VMware

2. About me Software engineer at VMware cloud native application team. Active contributor to upstream kubernetes in area like device plugin. Contributor at vSphere cloud provider, cluster api vSphere. Github: @figo

3. Machine learning on k8s landscape Kubeflow Kubernetes CPU Memory GPU Storage Network

4. Major aspects of GPU resource 1. Lifecycle management: setup, update, upgrade, auto-scaling 2. Sharing and Isolation 3. Monitoring 4. Heterogeneous GPU types 5. Performance consistency

5. GPU resource in k8s apiVersion: v1 kind: Pod metadata: name: my-gpu-pod spec: kubectl create -f mypod.yml k8s cluster containers: with GPU - name: image-processor image: gcr.io/image-processor:latest resources: limits: nvidia.com/gpu: 1

6. Lifecycle management Kubernetes Cluster GPU Device Plugin VM VM GPU driver, CRI GPU driver, CRI Hypervisor HW HW HW GPU GPU GPU

7. Lifecycle management - Cont. DIY solution Vendor solution vs Use existing process and build Many choices exist automation solution by yourself.

8. Sharing and isolation Tips: 1) Use namespace and GPU Quota 2) Use Pod PriorityClass and Pod QoS Note: unlike CPU, it does not support milicore

9. GPU resource monitoring //AcceleratorStats contains stats of accelerators that attached to container type AcceleratorStats struct { Make string `json:"make"` Model string `json:"model"` ID string `json:"id"` MemoryTotal uint64 `json:"memoryTotal"` MemoryUsed uint64 `json:"memoryUsed"` DutyCycle uint64 `json:"dutyCycle"` } To make it extendable: [KEP] Compute device assignment

10. Homogeneous to heterogeneous apiVersion: v1 nvidia tesla k80 + p100? kind: Pod metadata: Solutions: name: my-gpu-pod spec: containers: 1) [KEP] Resource api - name: image-processor 2) Use labels image: gcr.io/image-processor:latest resources: limits: gpu-gold: 1

11. Performance consistency CPU manager, hugepage are supported To further address NUMA and device locality requirement: 1) [KEP] NUMA manager 2) Hypervisor NUMA scheduler 3) Linux AutoNUMA

12.Join discussions at: wg-machine learning wg-resource management sig-node Contact me on github: @figo

13.References 1. [KEP] Compute device assignment https://github.com/kubernetes/community/pull/2454 2. [KEP] Resource api, kubernetes/community/keps/sig-node/00014-resource-api.md 3. [KEP] NUMA manager kubernetes/community/contributors/design-proposals/node/numa-manager.md 4. CPU manager https://kubernetes.io/blog/2018/07/24/feature-highlight-cpu-manager/ 5. Hugepage https://kubernetes.io/docs/tasks/manage-hugepages/scheduling-hugepages/ 6. Pod PriorityClass https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/

14.Thank you