Load contents of yml as configmap in k8s using helm

Question

Is it possible to load the contents of yml as configamp in k8s using Helm Charts? Helm Chart for ConfigMap

{{- define "common.configmap.tpl" -}}
kind: ConfigMap
apiVersion: v1
{{ template "common.metadata" . }}
  namespace: {{ .Values.namespace | default "default" }}
data:
{{ range $path, $bytes := .Files.Glob "config/*.yml" }}
  {{- $.Files.Get $path | indent 2 }}
{{ end }}
{{- end }}
{{- define "common.configmap" -}}
{{- template "common.util.merge" (append . "common.configmap.tpl") -}}
{{- end }}

Sample application.yml.

server:
  port: 8080
  name: localhost
sample:
    groupa:
        param1: value1base
        param2: value2base
    higherparam: valuehigherbase

expected configmap

apiVersion: v1
data:
  server_port: 8080
  server_name: localhost
  sample_groupa_param1: value1base
  sample_groupa_param2: value2base
  sample_higherparam: valuehigherbase
kind: ConfigMap
metadata:
  labels:
    app: test
    chart: test-1.0.0
  name: test-cm
  namespace: default

Answer 1

This docs might be of help Accessing Files Inside Templates .

You should be able to tweak this to work for you:

apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ .Release.Name }}-configmap
data:
  config.json: |-
    {
{{- range $key, $val := .Values.json }}
{{ $key | quote | indent 6}}: {{ $val | quote }}
{{- end}}
    }

values.yaml

json:
  key1: val1
  key2: val2
  key3: val3

apiVersion: v1
kind: ConfigMap
metadata:
  name: mangy-hare-configmap
data:
  config.json: |-
    {
      "key1": "val1"
      "key2": "val2"
      "key3": "val3"
    }

Or you can try loading the yaml using following way:

{{ (.Files.Glob "files/indexes.conf").AsConfig | indent 2 }}