How to reference a custom value file for sub-charts in helm?

Question

I have been implementing helm sub-chart by referring helm sub chart documentation. According to the documentation it worked for me. This works fine with default value files. But when I try to refer my own value file, the values are not there in the configmap. My value file is values.staging.yaml.

eg :-

config.yaml in mysubchart

apiVersion: v1
kind: ConfigMap
metadata:
    name: {{ .Release.Name }}-configmap
data:
    salad: {{ .Values.dessert }}

values.staging.yaml in mysubchart

dessert: banana

values.yaml in mysubchart

dessert: cake

Only 'cake' is referenced as the value. I need to reference banana as the value.

I have tried following commands.

helm install --dry-run --debug mychart --values mychart/charts/mysubchart/values.staging.yaml
helm install --dry-run --debug --name mychart mychart -f mychart/charts/mysubchart/values.staging.yaml
helm install --name mychart mychart -f mychart/charts/mysubchart/values.staging.yaml

In each instance the configmap does not refer the value in the values.staging.yaml.

Is there a way to do this?

Thank you .!

Can you add an example to the question? In the values file you're trying to use, are the keys you're trying to set under a top-level key that's the name of the subchart? — David Maze

David Maze David Maze · Accepted Answer · 2019-07-14T13:06:55

As described in Overriding Values of a Child Chart in your link, you need to wrap the subchart values in a key matching the name of the subchart.

Any values file you pass with helm install -f is always interpreted at the top level, even if it's physically located in a subchart's directory. A typical values file could look like

mysubchart:
  dessert: banana

How to reference a custom value file for sub-charts in helm?

1 Answers