Helm Chart configmap templating with toYaml - kubernetes

Question

I have values.yml file that takes in a list of mountPaths with this format:
global:
mountPath:
hello:
config: /etc/hello/hello.conf
node: /opt/hello/node.jks
key: /opt/hello/key.jks
cert: /opt/hello/cert.jks
I want the resulting rendered template to be
volumeMounts:
- name: config
mountPath: /etc/hello/hello.conf
subPath: config
- name: node
mountPath: /opt/hello/node.jks
subPath: node
- name: key
mountPath: /opt/hello/key.jks
subPath: key
- name: cert
mountPath: /opt/hello/cert.jks
subPath: cert
How would I accomplish this? I tried the following in my deployment.yaml template file:
volumeMounts:
{{- range $key, $value := pluck .Values.service_name .Values.global.mountPath.serviceName | first }}
- name: {{ $key }}
mountPath: $value
subPath: {{ $key }}
{{- end }}
the following helm command that i have run but the it won't work for me. How do I accomplish getting to the format I want above based on the input?
helm upgrade --install \
--namespace ${NAMESPACE} \
--set service_name=hello \
--set namespace=${NAMESPACE} \
hello . \
-f values.yaml \

Answer 1

Here is what I did:
volumeMounts:
{{- range $key, $value := pluck .Values.service_name .Values.global.mountPath | first }}
- name: {{ $key }}
mountPath: {{ $value }}
subPath: {{ $key }}
{{- end }}
helm template --set service_name=hello [...] seems to render exactly what you want.
Notice I changed the line with mountPath field: $value -> {{ $value }},
and the line with range: .Values.global.mountPath.serviceName -> .Values.global.mountPath