Add support for setting Capabilities.KubeVersion.Version

[pgier]

This is maybe a duplicate of #318, but I think it would be a worthwhile feature. The use case I have is that I'm using the kube-prometheus-stack helm chart which is still relying on Capabilities.KubeVersion.Version in the latest release.

https://github.com/prometheus-community/helm-charts/blob/kube-prometheus-stack-32.2.0/charts/kube-prometheus-stack/templates/_helpers.tpl#L134

{{- define "kube-prometheus-stack.kubeVersion" -}}
  {{- default .Capabilities.KubeVersion.Version .Values.kubeVersionOverride -}}
{{- end -}}

Currently, I can't get an accurate diff in my project because the kube-prometheus-stack chart calculates the wrong api version for Ingress because of the missing KubeVersion.

I'm not sure if it would be better to add a --kube-version arg similar what helm template uses, or if the version could be retrieved from the remote server and then set in helm template, that would also work.

[pgier]

As usual, I noticed a workaround right after creating the issue. In case it helps anyone else, the way to get around this issue with the kube-prometheus-stack, is to set kubeVersionOverride.

kube-prometheus-stack:
  kubeVersionOverride: 1.21

I think an option to pass the kube version to the helm template generation would still be useful so that this workaround would not be necessary.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.