[FeatureRequest] Support dynamic volume provisioning for distributed training job

[zhan849]

This is ported from kubeflow/training-operator#949 as we want to make this feature generic. Basically we want to add volumeClaimTemplate to job spec so the workers are able to use customized volumes for scratch space.

/assign

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[xiaogaozi]

@zhan849 May I ask is there any progress about this feature?

[zhan849]

@xiaogaozi thanks for following up - unfortunately I've got little bandwidth in Q3 to work on this given several high-priority items I need to focus on for my company. I will likely to get back to this in Q4. Is this blocking any release? If so, I'm ok if someone else take over the impl for the feature.

Apologize about the inconvenience

[xiaogaozi]

We (Xiaohongshu) rely on this feature recently, it's better if someone could continue the contribution.

[xiaogaozi]

Just FYI, Volcano job controller is working on PVC per pod feature: volcano-sh/volcano#703