Is it possible to have a required .Value without using it in the template.
For example in my case I want to require to write a password for a subchart of mongodb but I won't use it on my templates so can I have something like bellow in a template:
{{- required 'You must set a mongodb password' .Values.mongodb.mongodbPassword | noPrint -}}
apiVersion: apps/v1
kind: Deployment
metadata:
name: {{ include "cloud.fullname" . }}
labels:
{{- include "cloud.labels" . | nindent 4 }}
app.kubernetes.io/component: cloud
spec:
replicas: {{ .Values.cloud.minReplicaCount }}
selector:
....
And the result would be something like:
apiVersion: apps/v1
kind: Deployment
metadata:
name: blablablabla
...
Yes, it is possible. Let's consider the below Values.yaml file:
Values.yaml:
mongodb:
mongodbPassword: "AbDEX***"So, you want to generate the deployment file only if the password is set. You can do by using if-block of go-templating. If the length of the password field is greater than zero, the deployment yaml will be generated otherwise not.
{{- if .Values.mongodb.mongodbPassword}}
apiVersion: apps/v1
kind: Deployment
metadata:
name: {{ include "cloud.fullname" . }}
labels:
{{- include "cloud.labels" . | nindent 4 }}
app.kubernetes.io/component: cloud
spec:
replicas: {{ .Values.cloud.minReplicaCount }}
selector:
....
{{- end }}Reference:
{{if pipeline}} T1 {{end}}
If the value of the pipeline is empty, no output is generated;
otherwise, T1 is executed. The empty values are false, 0, any nil pointer or
interface value, and any array, slice, map, or string of length zero.
Dot is unaffected.Possibly the most direct way is to use sprig's fail function.
{{- if not .Values.mongodb.mongodbPassword -}}
{{- fail "You must set a mongodb password" -}}
{{- end -}}Assigning the required expression to a variable (that you never use) will probably also have the desired effect.
{{- $unused := required "You must set a mongodb password" .Values.mongodb.mongodbPassword -}}