how can i reference the namespace in values.yaml?

Question

I would like to be able to reference the current namespace in values.yaml to use it to suffix some values like this

# in values.yaml
someParam: someval-{{ .Release.Namespace }}

It much nicer to define it this way instead of going into all my templates and adding {{ .Release.Namespace }}. If I can do it in values.yaml it's much clearer and only needs to be defined in one place.

Answer 1

You can use named templates to define re-usable helper templates. E.g.

In templates/_helpers.tpl:

{{- define "myChart.someParam" -}}someval-{{ .Release.Namespace }}{{- end -}}

In templates/configmap.yaml (for example):

apiVersion: v1
kind: ConfigMap
metadata:
  name: something
data:
  foo: {{ template "myChart.someParam" . }}

The result:

$ helm template . --namespace=bar
---
# Source: helm/templates/configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: something
data:
  foo: someval-bar