k8s template examples

_helpers.tpl

{{/*
Renders all urls as env variables. This is done so adding new
service-to-service talk doesn't require a template change 
so Values.urls.member_service_url will be rendered as MEMBER_SERVICE_URL
env var. :p
*/}}
{{- define "env.urls" -}}
{{- range $key, $val := .Values.urls -}}
{{ $env_name := $key | upper }}
        - name: {{ $env_name }}
          value: {{ $val | quote }}
{{- end -}}
{{- end -}}


{{/*
Get the filename of the current template
*/}}
{{- define "filename" }}
{{- .Template.Name | base | replace ".yaml" "" -}}
{{- end -}}

values.yaml

urls:
  member_service_url: http://member-service:9000
  visitor_service_url: http://visitor-service:9000
  biscuits_service_url: http://biscuits-service:9000

To use it, just {{- include "env.urls" . }} inside the env block of your deployment's container template