I'm trying to define n StatefulSets where n is the number of nodes required, set in values.yaml as nodeCount. I get an error that looks to be scope related, but I can't seem to get the scope sorted out. Am I missing something here?
The relevant content in my StatefulSet .yaml file:
{{ range $k, $v := until ( .Values.nodeCount | int) }}
---
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
name: {{ $.Release.Name }}
labels:
app: {{ $.Release.Name }}
chart: {{ template "myapp-on-kube.chart" . }} #here's my call to _helpers
release: {{ $.Release.Name }}
heritage: {{ $.Release.Service }}The relevant content in _helpers.tpl:
{{/*
Create chart name and version as used by the chart label.
*/}}
{{- define "myapp-on-kube.chart" -}}
{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
{{- end -}}The error I get:
Error: render error in "myapp-on-kube/templates/statefulset.yaml": template: myapp-on-kube/templates/_helpers.tpl:31:25: executing "myapp-on-kube.chart" at <.Chart.Name>: can't evaluate field Chart in type intSeveral of the Go templating constructs change the meaning of . to be the thing that's being looped over, and you need to use $ to refer to the initial value. Most of your template correctly refers to e.g. $.Release.Name, but when you invoke the helper template, it's using the current context rather than the root value. Change:
chart: {{ template "myapp-on-kube.chart" $ }}(Note that the template as you have it will declare several StatefulSets all with the same name, which won't go well. I might create just one StatefulSet with replicas: {{ .Values.nodeCount }}.)