Check existence of nested object in Helm

Asked Mar 02 '20 at 14:37

Active Mar 02 '20 at 14:37

Viewed 797 times

I've got these values in a YAML file:

configuration:
  files:
  - from: "foo.yml"
    to: "bar.yml"

I would like to check whether configuration and files exists like this:

{{- if and .Values.configuration .Values.configuration.files -}}
volumeMounts:
  {{- range .Values.configuration.files -}}
  - name: "config"
    mountPath: {{ .to }}
  {{- end -}}
{{- end -}}

It works beautifully when configuration and files exist but when both are omitted I get this error when rendering the Helm template:

Error: render error in "chart/templates/deployment.yaml": template: chart/templates/deployment.yaml:62:48: executing "chart/templates/deployment.yaml" at <.Values.configuration.files>: nil pointer evaluating interface {}.files

How can I check whether both exist without nesting two ifclauses?

asked Mar 02 '20 at 14:37

Hedge

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what version of helm are you using – edbighead Mar 02 '20 at 15:29
both 2.15 and 3.1 but a solution for any of them would be fine. – Hedge Mar 02 '20 at 16:02
I was tempted to write an answer but this fits the scenario. https://stackoverflow.com/questions/59795596/helm-optional-nested-variables/68807258#68807258 – Rafael Aguilar Mar 09 '23 at 09:56

Check existence of nested object in Helm

0 Answers0