Helm for loop list - kubernetes-helm

Question

I wanted to use one deployment file and value file to create charts for multiple services.
My value file has the values of all the service, that has to be used one deployment file.
below is my deployment file content
apiVersion: apps/v1
kind: Deployment
metadata:
name: {{ .Values.PA.name }}-deployment
labels:
app: {{ .Values.PA.name }}
spec:
replicas: {{ .Values.PA.replicas }}
selector:
matchLabels:
app: {{ .Values.PA.name }}
template:
metadata:
labels:
app: {{ .Values.PA.name }}
spec:
containers:
- name: {{ .Values.PA.name }}
image: {{ .Values.PA.image }}:{{ .Values.PA.tag }}
ports:
- containerPort: {{ .Values.PA.port }}
Below is my values file
PA:
name: povisioning_adapter
replicas: 1
env: dev
image: provisioning_adapter
tag: master
port: 8001
service:
protocol: TCP
port: 8001
targetPort: 8001
nodePort: 30100
SA:
name: service_adapter
replicas: 1
env: dev
image: service_adapter
tag: master
port: 8002
service:
protocol: TCP
port: 8002
targetPort: 8002
nodePort: 30200
Now I want to iterate through PA, SA values, etc. inside my deployment file.
How to declare list [PA,SA,..] and for loop through it inside deployment file?

Answer 1

You can wrap this in a range loop:
{{- range list .Values.PA .Values.SA -}}
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: {{ .name }}-deployment
...
{{ end -}}
If you need to refer to the top-level .Values, in this setup you'd need to "escape" the range loop's scoping by explicitly referring to the top-level value $. You also might need this in a template parameter.
metadata:
labels:
name: {{ .name }}
{{ include "myapp.labels" $ | indent 4 }}
{{/* ^ */}}
You could do something similar breaking this out into a helper template that produced one of the Kubernetes objects. You may be able to restructure this to use the name of the component rather than its specific settings; where you currently have .Values.PA.name, if you have the top-level $.Values object and you know the name, then index $.Values "PA" "name" is equivalent, and any of those parts can be replaced by variables.