title: helm chart: Include multiple lines from values.yaml into configmap
body: <p>I want to create a helm chart that results in a config map that looks like this:</p>
  
  <pre><code>apiVersion: v1
  kind: ConfigMap
  metadata:
    name: myconfigmap
  data:
    myconfigfile1.properties: |
      property11 = value11
      property12 = value12
    myconfigfile1.properties: |
      property21 = value21
      property22 = value22
  </code></pre>
  
  <p>whereas this part shall be configurable in the <code>values.yaml</code>:</p>
  
  <pre><code>myconfig:
    myconfigfile1.properties: |
      property11 = value11
      property12 = value12
    myconfigfile1.properties: |
      property21 = value21
      property22 = value22
  </code></pre>
  
  <p>Now I want to iterate over all the children of <code>myconfig</code> in the <code>values.yaml</code> and add them to my helm template. My attempts so far with this template:</p>
  
  <pre><code>apiVersion: v1
  kind: ConfigMap
  metadata:
    name: myconfigmap
  data: 
    # {{- range $key, $val := .Values.myconfig}}
    # {{ $key }}: |
    #   {{ $val }}
    # {{- end }}
  
  </code></pre>
  
  <p>resulted in this error message:</p>
  
  <pre><code>$ helm install --dry-run --debug ./mychart/ --generate-name
  install.go:159: [debug] Original chart version: ""
  install.go:176: [debug] CHART PATH: /home/my/helmcharts/mychart
  Error: YAML parse error on mychart/templates/myconfig.yaml: error converting YAML to JSON: yaml: line 11: could not find expected ':'
  helm.go:84: [debug] error converting YAML to JSON: yaml: line 11: could not find expected ':'
  YAML parse error on mychart/templates/myconfig.yaml
  </code></pre>
  
  <p>I can avoid the error by removing the <code>|</code> after <code>myconfigfile1.properties:</code> in my <code>values.yaml</code>, however then I lose the line breaks and the result is not what I want.</p>
  
  <p>Many thanks for your help in advance.</p>
  
  <p>Kind regards,
  Martin</p>