clusterIP: "{{ .Values.service.clusterIP }}" not define in values

[marcossilvestrini]

Hi.

I find a error in to definitions of templates and values.

{{- if .Values.service.clusterIP }} clusterIP: "{{ .Values.service.clusterIP }}" {{- end }}

This key\value is not define in values.yaml

Values: https://github.com/kubernetes/autoscaler/blob/2c2128e983b6fb918ce86de8fafe6c10030e6041/charts/cluster-autoscaler/values.yaml#L328

Template: https://github.com/kubernetes/autoscaler/blob/2c2128e983b6fb918ce86de8fafe6c10030e6041/charts/cluster-autoscaler/templates/service.yaml#L17

[gjtempleton]

/good-first-issue /kind bug

[k8s-ci-robot]

@gjtempleton: This request has been marked as suitable for new contributors.

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In response to [this](https://github.com/kubernetes/autoscaler/issues/6631): >/good-first-issue >/kind bug Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[Shubham82]

/triage accepted

[Shubham82]

We also have to update the link for External IPs, present under the comment as a reference.

Line to update: https://github.com/kubernetes/autoscaler/blob/2c2128e983b6fb918ce86de8fafe6c10030e6041/charts/cluster-autoscaler/values.yaml#L335

Current Link: https://kubernetes.io/docs/user-guide/services/#external-ips Updated Link: https://kubernetes.io/docs/concepts/services-networking/service/#external-ips

[TronSkywalker]

I cannot reproduce a bug or error for the not defined clusterID, shouldn't this then be kind/cleanup?

Will provide PR if I may pick this issue up. (Will include your comment https://github.com/kubernetes/autoscaler/issues/6631#issuecomment-2006828378)

[jackfrancis]

Hi @marcossilvestrini , in fact this is not really a bug. The fact that we don't declare a default in the values.yaml of the chart doesn't mean we can't use it in the template. For example:

$ helm template cas cluster-autoscaler --set service.clusterIP="10.0.0.10" | grep 'kind: Service$' -A10
kind: Service
metadata:
  labels:
    app.kubernetes.io/instance: "cas"
    app.kubernetes.io/name: "aws-cluster-autoscaler"
    app.kubernetes.io/managed-by: "Helm"
    helm.sh/chart: "cluster-autoscaler-9.40.0"
  name: cas-aws-cluster-autoscaler
  namespace: default
spec:
  clusterIP: "10.0.0.10"

As described here, there are three ways to input values to be interpreted by the helm template, only one of which is via the values.yaml file.

You could argue that it is a best-practice to include a default in the values.yaml, and more importantly because we're using helm-docs to auto-generate helm values documentation, we should include it there and then re-gen documentation. We can call that a cleanup item.