using 0.13.2 Helm provider terraform, I have a Chart with a subchart nested:
├── charts
│ └── postgres
│ ├── Chart.yaml
│ ├── templates
│ │ ├── deployment.yaml
│ │ ├── env.yaml
│ │ └── service.yaml
│ └── values.yaml
├── Chart.yaml
├── templates
│ ├── configmap.yaml
│ ├── deployment.yaml
│ ├── env.yaml
│ ├── ingress.yaml
│ └── service.yaml
└── values.yaml
I need to use from the deployment.yml of the postgres subchart, the values of the parent chart. How can I config the configmap of the subchart to get the parent chart values? My current configmap is like this:
apiVersion: v1
kind: ConfigMap
metadata:
name: {{ .Release.Name }}-postgres-env
namespace: {{ .Release.Namespace }}
data:
{{- range $key, $val := .Values.environment }}
{{ $key }}: {{ $val | quote }}
{{- end }}
Thanks in advance.
You can't directly do this. In discussing Scope, Dependencies, and Values, the Helm documentation notes (with a motivating example):
Charts at a higher level have access to all of the variables defined beneath. So the WordPress chart can access [
.Values.child.setting]. But lower level charts cannot access things in parent charts, so [the child] will not be able to access [a parent] property. Nor, for that matter, can it access [sibling subchart settings].
You have two options. If you move the settings under a global: key
global:
environment:
keys: values
then the parent and all subcharts will be able to access .Values.global.environment. Or, if you move the settings under a key specific to the subchart
postgres:
environment:
keys: values
then the subchart will see .Values.environment, and the parent can reference .Values.postgres.environment.
(If you can't use a prepackaged PostgreSQL chart, it's not necessarily wrong to flatten these parts into a single chart, making it clear from the filenames that something is statefulset-postgres.yml or svc-postgres.yml. Then the templates would be able to use the single .Values.)