Summary

Add a PodMetadataPatch field to the workflow template definition to allow the workflow controller to update the Metadata field. This field would function similarly to PodSpecPatch, and logic for applying the patch would need to be added in workflow/controller/workflowpod.go

// PodMetadataPatch holds strategic merge patch to apply against the pod metadata. Allows parameterization of
// metadata fields Labels and Annotations, which are not strings.
PodMetadataPatch string `json:"podMetadataPatch,omitempty" protobuf:"bytes,31,opt,name=podMetadataPatch"

Use Cases

• This feature would be used by Kubeflow Pipelines (KFP) to apply task-specific pod metadata. In KFP currently, pod metadata set on a single task is applied to pods for all the tasks in an input pipeline because the workflow template used for task execution is reused. Having a PodMetadataPatch field on the template definition would allow KFP to pass in a single, task-specific patch parameter each time that template is called.

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