[SOLVED] Put yaml (as data) into a config map

Put yaml (as data) into a config map

Is there a way to store yaml data in a config map?

In my values.yaml I have something like the below

config:
  filters:
    - kind: Pod
      apiVersion: v1
...

In my config map, I'm currently doing

...
data:
  config.yaml: |-
    {{ .Values.config }}

But in the resulting configmap the data is "inlined" and formatted as this

...
data:
  config.yaml: >-
    map[filters:[map[apiVersion:v1...

Which isn't yaml and therefore can't be parsed by the app reading it.

Solution

Let's say you have a demo-chart:

.
└── demo
    ├── charts
    ├── Chart.yaml
    ├── templates
    │   ├── configmap.yaml
    │   ├── _helpers.tpl
    │   └── NOTES.txt
    └── values.yaml

values.yaml:

config:
  filters:
    - kind: Pod
      apiVersion: v1

configmap.yaml:

{{- if .Values.config }}
apiVersion: v1
kind: ConfigMap
metadata:
  name: demo-name
data:
  config.yml: |- {{- toYaml .Values.config | nindent 4 }}
{{- end }}

Explanation: toYaml parse the data loaded from the values.yaml into YAML and nindent put 4 spaces in front of every line.

Check:

$ helm template demo
---
# Source: demo/templates/configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: demo-name
data:
  config.yml: |-
    filters:
    - apiVersion: v1
      kind: Pod