Re: [kubernetes/kubernetes] Cannot format a selector with jsonpath (#15858)

[Michail Kargakis]

@kubernetes/sig-cli-misc

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[Tim Hockin]

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[Nikhita Raghunath]

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[Nikhita Raghunath]

Removing help-wanted as there isn't a clear direction and details on how to fix this for contributors to dive into.

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[Kubernetes Prow Robot]

@liggitt: Closing this issue.

In response to this:

/close

The layer that does jsonpath rendering is intentionally type-agnostic. I don't anticipate adding kube-specific object rendering there.

Resources that support the /scale subresource (replication controllers, replicasets, deployments, statefulsets, some custom resources, etc) return a stringified selector in the .status.selector field of the scale subresource:

kubectl get --raw /apis/apps/v1/namespaces/default/deployments/my-dep/scale | \
 jq -r .status.selector

Something like #60902 that would allow kubectl get|patch to make requests to subresources would let us do this:

kubectl get deployment/my-dep --subresource=scale -o jsonpath="{.status.selector}"

xref kubernetes/kubectl#564 for adding subresource support to kubectl which would enable getting string-formatted selectors for scale-supporting resources.

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[Jordan Liggitt]

/close

The layer that does jsonpath rendering is intentionally type-agnostic. I don't anticipate adding kube-specific object rendering there.

Resources that support the /scale subresource (replication controllers, replicasets, deployments, statefulsets, some custom resources, etc) return a stringified selector in the .status.selector field of the scale subresource:

kubectl get --raw /apis/apps/v1/namespaces/default/deployments/my-dep/scale | \
  jq -r .status.selector

Something like #60902 that would allow kubectl get|patch to make requests to subresources would let us do this:

kubectl get deployment/my-dep --subresource=scale -o jsonpath="{.status.selector}"

xref kubernetes/kubectl#564 for adding subresource support to kubectl which would enable getting string-formatted selectors for scale-supporting resources.

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[Kubernetes Prow Robot]

Closed #15858.