Insert multiline json string into helm template for base64 encoding

Question

I am trying to insert multiline json string into helm template for base64 encoding required for Kubernetes secret.

Goals:

• helm value is injected into json string
• multi-line json string must be base64 encoded using b64enc

myfile1.json does not work but myfile2.json works. I prefer not to put entire json file in values.yaml.

apiVersion: v1
kind: Secret
metadata:
  name: {{ template "mychart.fullname" . }}
  labels:
    app: {{ template "mychart.name" . }}
    chart: {{ template "mychart.chart" . }}
    release: {{ .Release.Name }}
    heritage: {{ .Release.Service }}
type: Opaque
data:
  myfile.json: {{ |-
    {
      "item1": {
          "name": "{{ .Values.item1.name }}"
      },
      "item2": {
      }
    } | b64enc }}
  myfile2.json: {{ .Values.myfile2 | b64enc }}

Answer 1

I found a solution. You can use tpl function on json file to render template.

apiVersion: v1
kind: Secret
metadata:
  name: {{ template "mychart.fullname" . }}
  labels:
    app: {{ template "mychart.name" . }}
    chart: {{ template "mychart.chart" . }}
    release: {{ .Release.Name }}
    heritage: {{ .Release.Service }}
type: Opaque
data:
  myfile.json: {{ tpl(.Files.Get "myfile.json") . | b64enc }}

myfile.json

{
  "item1": {
    "name": "{{ .Values.item1.name }}"
  },
  "item2": {
  }
}