How do I load multiple templated config files into a helm chart?

Question

So I am trying to build a helm chart.

in my templates file I've got a file like:

apiVersion: v1
kind: ConfigMap
metadata:
  name: config-map
data:
{{ Do something here to load up a set of files | indent 2 }}

I have another directory in my chart: configmaps where a set of json files, that themselves will have templated variables in them:

a.json
b.json
c.json

Ultimately I'd like to be sure in my chart I can reference:

volumes:
   - name: config-a
     configMap:
       name: config-map
       items:
       - key: a.json
         path: a.json

Answer 1

I had same problem for a few weeks ago with adding files and templates directly to container.

Look for the sample syntax:

apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx-configmap-{{ .Release.Name }}
  namespace: {{ .Release.Namespace }}
  labels:
    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
    release: {{ .Release.Name }}
    heritage: {{ .Release.Service }}
data:
  nginx_conf: {{ tpl (.Files.Get "files/nginx.conf") . | quote }}
  ssl_conf: {{ tpl (.Files.Get "files/ssl.conf") . | quote }}
  dhparam_pem: {{ .Files.Get "files/dhparam.pem" | quote }}
  fastcgi_conf: {{ .Files.Get "files/fastcgi.conf" | quote }}
  mime_types: {{ .Files.Get "files/mime.types" | quote }}
  proxy_params_conf: {{ .Files.Get "files/proxy_params.conf" | quote }}

Second step is to reference it from deployment:

  volumes:
  - name: {{ $.Release.Name }}-configmap-volume
    configMap:
      name:nginx-configmap-{{ $.Release.Name }}
      items:
        - key: dhparam_pem
          path: dhparam.pem
        - key: fastcgi_conf
          path: fastcgi.conf
        - key: mime_types
          path: mime.types
        - key: nginx_conf
          path: nginx.conf
        - key: proxy_params_conf
          path: proxy_params.conf
        - key: ssl_conf
          path: ssl.conf 

It's actual for now. Here you can find 2 types of importing:

• regular files without templating
• configuration files with dynamic variables inside

Please do not forget to read official docs: https://helm.sh/docs/chart_template_guide/accessing_files/

Good luck!