Helm - How to add a label block through values.yaml - kubernetes

Question

I have simple helm chart. I have a labels: block that I need to refer in a Deployment
Here's my values.yaml
labels:
app: test-app
group: test-group
provider: test-provider
And in the templates/deployment.yaml I need to add the above whole labels block. So I did;
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: {{ include "accountmasterdata.fullname" . }}
namespace: {{ .Values.namespace }}
labels:
{{ .Values.labels | nindent 4 }}
{{- include "accountmasterdata.labels" . | nindent 4 }}
But I get the following error
wrong type for value; expected string; got map[string]interface {}
Can someone help me with two things:
How can I solve this issue
And in the line where it says {{- include "accountmasterdata.labels" . | nindent 4 }} , where I can see the accountmasterdata.labels values? And how to override those?
Thank you!

Answer 1

Iterating over a mapping is covered in the "Variables" documentation:
For data structures that have both a key and a value, we can use range to get both. For example, we can loop through .Values.favorite like this:
apiVersion: v1
kind: ConfigMap
metadata:
name: {{ .Release.Name }}-configmap
data:
myvalue: "Hello World"
{{- range $key, $val := .Values.favorite }}
{{ $key }}: {{ $val | quote }}
{{- end }}
So in your template, you would handle the value of .Values.labels like this:
labels:
{{- range $name, $value := .Values.labels }}
{{ $name | quote }}: {{ $value | quote }}
{{- end -}}
And in the line where it says {{- include "accountmasterdata.labels" . | nindent 4 }} , where I can see the accountmasterdata.labels values? And how to override those?
Is this a template you are writing? If so, where have you defined these values? Presumably in your templates/ directory there exists a file that includes something like:
{{- define "accountmasterdata.labels" -}}
...
{{- end -}}
The contents of that block are what will get inserted at the point of reference.
Lastly, in your template you have:
namespace: {{ .Values.namespace }}
But you probably want to use .Release.Namespace instead:
namespace: {{ .Release.Namespace | quote }}
With the above changes in place, I end up with:
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: {{ include "accountmasterdata.fullname" . }}
namespace: {{ .Release.Namespace | quote }}
labels:
{{- range $name, $value := .Values.labels }}
{{ $name | quote }}: {{ $value | quote }}
{{- end -}}
{{- include "accountmasterdata.labels" . | nindent 4 }}