Error when hub.extraFiles added using --set-file following the docs

[lucianolacurcia]

Bug description

When I try to helm upgrade current deployment now adding hub.extraFiles.stringData I get the following error:

$ helm upgrade jupyterhub-stable jupyterhub/jupyterhub -f values_test.yml --version=2.0.0 --set-file hub.extraFiles.mi_config.stringData=$(pwd)/pre_spawn_config.py
Error: UPGRADE FAILED: values don't meet the specifications of the schema(s) in the following chart(s):
jupyterhub:
- hub.extraFiles.mi_config: mountPath is required

But my values.yml already has the required value:

hub:
  extraFiles:
    mi_config:
      mountPath: "/usr/local/etc/jupyterhub/jupyterhub_config.d/my_jupyterhub_config.py"

Expected behaviour

I would expect helm to not ask me for a value I already have.

Workaround

As a work around, I use the following command:

helm upgrade jupyterhub-stable jupyterhub/jupyterhub -f values_test.yml --version=2.0.0 --set-file hub.extraFiles.mi_config.stringData=$(pwd)/pre_spawn_config.py -
-set  hub.extraFiles.mi_config.mountPath="/usr/local/etc/jupyterhub/jupyterhub_config.d/my_jupyterhub_config.py"

and comment out the extraFile lines:

hub:
  # extraFiles:
  #   mi_config:
      # mountPath: "/usr/local/etc/jupyterhub/jupyterhub_config.d/my_jupyterhub_config.py"

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[consideRatio]

If I'm using this config, saved into test.yaml.

hub:
  extraFiles:
    mi_config:
      mountPath: "/usr/local/etc/jupyterhub/jupyterhub_config.d/my_jupyterhub_config.py"

Then the error I get is the following, which makes sense to me given that config.

$ helm template --repo=https://jupyterhub.github.io/helm-chart jupyterhub --values test.yaml

Error: values don't meet the specifications of the schema(s) in the following chart(s):
jupyterhub:
- hub.extraFiles.mi_config: Must validate one and only one schema (oneOf)
- hub.extraFiles.mi_config: data is required

You have not provided something to put in the file via data, stringData, or binaryData. In the case of a .py file, you should go for stringData.

Using this configuration, there is no error and you should end up with a mounted file containing two print statements.

hub:
  extraFiles:
    mi_config:
      mountPath: "/usr/local/etc/jupyterhub/jupyterhub_config.d/my_jupyterhub_config.py"
      stringData: |
        print("hi")
        print("hi again")

[github-actions[bot]]

Hi there @lucianolacurcia :wave:!

I closed this issue because it was labelled as a support question.

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