How to set environment variables in helm? - kubernetes

Question

I have the following deployment definition:
...
containers:
- name: {{ .Release.Name }}
image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
imagePullPolicy: {{ .Values.image.pullPolicy }}
{{ if .Values.env.enabled }}
env:
{{- range .Values.env.vars }}
?????What comes here?????
{{- end }}
{{ end }}
ports:
- name: http
containerPort: 8080
protocol: TCP
livenessProbe:
httpGet:
path: /
port: http
readinessProbe:
httpGet:
path: /
port: http
resources:
{{- toYaml .Values.resources | nindent 12 }}
...
in the values.yaml, I have defined:
env:
enabled: false
vars: []
What I would like to do is, to set environment dynamically via --set, for instance:
helm template user-svc \
--set image.tag=0.1.0 \
--set image.repository=user-svc \
--set env.enabled=true \
--set env.vars.POSTGRES_URL="jdbc:postgresql://localhost:5432/users" \
--set env.vars.POSTGRES_USER="dbuser" \
./svc
after rendering, it should show:
...
containers:
- name: demo
image: game.example/demo-game
env:
- name: POSTGRES_URL
value: jdbc:postgresql://localhost:5432/users
...
and how to set the following option via --set:
- name: UI_PROPERTIES_FILE_NAME
valueFrom:
configMapKeyRef:
name: game-demo
key: ui_properties_file_name

Answer 1

You can access the --set option using .Values.
{{- if eq .Values.env.enabled "true" -}}
env:
- name: {{ .Values.env.vars.POSTGRES_USER }}
value: {{ .Values.env.vars.env.vars.POSTGRES_URL}}
{{- end }}
Try the above.