How to reference a value defined in a template in a sub-chart in helm for kubernetes?

Question

I\'m starting to write helm charts for our services.

There are two things I\'m not sure how they are supposed to work or what to do with them.

First: the rel

Answer 1

Are you pulling in postgresql as a subchart of your chart (via your chart's requirements.yaml)? If so, both the postgresql (sub) chart and your chart will have the same .Release.Name - thus, you could specify your container's environment as

  env:
    - name: DB_HOST
      value: {{ printf "%s-postgresql" .Release.Name }}

if you override postgresql's name by adding the following to your chart's values.yaml:

postgresql:
  nameOverride: your-postgresql

then your container's env would be:

  env:
    - name: DB_HOST
      value: {{ printf "%s-%s" .Release.Name .Values.postgresql.nameOverride }}