Kubernetes - How to define ConfigMap built using a file in a yaml?

Question

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

Answer 1

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"     }