Agfdhyk

At present I am creating a configmap from the file config.json by executing:

kubectl create configmap jksconfig --from-file=config.json

I would want the ConfigMap to be created as part of the deployment and tried to do this:

apiVersion: v1

kind: ConfigMap

metadata:

  name: jksconfig

data:

  config.json: |-

    {{ .Files.Get "config.json" | indent 4 }}

But doesn't seem to work. What should be going into configmap.yaml so that the same configmap is created?

---UPDATE---

when I do a helm install dry run:

# Source: mychartv2/templates/jks-configmap.yaml

apiVersion: v1

kind: ConfigMap

metadata:

  name: jksconfig

data:

  config.json: |

Note: I am using minikube as my kubernetes cluster

Your config.json file should be inside your mychart/ directory, not inside mychart/templates

Chart Template Guide

configmap.yaml

apiVersion: v1

kind: ConfigMap

metadata:

  name: {{ .Release.Name }}-configmap

data:

  config.json: |-

{{ .Files.Get "config.json" | indent 4}}

config.json

{

    "val": "key"

}

helm install --dry-run --debug mychart

[debug] Created tunnel using local port: '52091'     



[debug] SERVER: "127.0.0.1:52091"                    



...           



NAME:   dining-saola                                 

REVISION: 1                                          

RELEASED: Fri Nov 23 15:06:17 2018                   

CHART: mychart-0.1.0                                 

USER-SUPPLIED VALUES:                                

{}                                                   



...



---                                                  

# Source: mychart/templates/configmap.yaml           

apiVersion: v1                                       

kind: ConfigMap                                      

metadata:                                            

  name: dining-saola-configmap                       

data:                                                

  config.json: |-                                    

    {                                                

        "val": "key"                                 

    }     

EDIT:

But I want it the values in the config.json file to be taken from values.yaml. Is that possible?

configmap.yaml

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

helm install --dry-run --debug mychart

# Source: mychart/templates/configmap.yaml

apiVersion: v1

kind: ConfigMap

metadata:

  name: mangy-hare-configmap

data:

  config.json: |-

    {

      "key1": "val1"

      "key2": "val2"

      "key3": "val3"

    }

Soln 01:

• insert your config.json file content into a template


• then use this template into your data against config.json
  


• then run $ helm install command

finally,

{{define "config"}}

{

    "a": "A",

    "b": {

        "b1": 1

    }

}

{{end}}



apiVersion: v1

kind: ConfigMap

metadata:

  name: jksconfig

  labels:

    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"

    app: "my-app"

    heritage: "{{ .Release.Service }}"

    release: "{{ .Release.Name }}"

data:

  config.json: {{ (include "config" .) | trim | quote }}

Here is an example of a ConfigMap that is attached to a Deployment:

ConfigMap:

---

apiVersion: v1

kind: ConfigMap

metadata:

  name: jksconfig

data:

  config.json: |-

{{ .Files.Get "config.json" | indent 4 }}

Deployment:

---

apiVersion: apps/v1beta2

kind: Deployment

metadata:

  name: jksapp

  labels:

    app: jksapp

spec:

  selector:

    matchLabels:

      app: jksapp

  template:

    metadata:

      labels:

        app: jksapp

      containers:

        - name: jksapp

          image: jksapp:1.0.0

          ports:

            - containerPort: 8080

          volumeMounts:

            - name: jksconfig

              mountPath: /path/to/config.json

      volumes:

        - name: config

          configMap:

            name: jksconfig