Verify that all values for a kubernetes helm chart have been used

user_2739647 0
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I'd like to check that my kubernetes helm chart does not define unused values in values.yaml. This should include any subcharts such that if you've defined subchart.foo.bar: ??? in the top-level values.yaml that key is definitely used in the subchart, or possibly as a short-cut mentioned in the subchart/values.yaml.

This is needed to prevent us from shipping bogus "documentation" in the values.yaml, for example if a key in a subchart has been changed or removed.

Ideally there would also be some possibility to report on which subchart values have not been overridden in the top-level chart, though this is less concerning.

Are there any existing tools that can help with this?

kubernetes-helm kubernetes
2 Answers

Since the Helm v3 release you can now define a schema for your values. On commands like helm install your provided values are automatically validated against the schema.

Please see the official documentation: https://helm.sh/docs/topics/charts/#schema-files

Schema validation works for subcharts too, this is also mentioned in the documentation on the link above.

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