Feature flag to enable/disable canary + optional prometheus install (#937)

charts/fission-all/templates/_helpers.tpl

@@ -14,3 +14,20 @@ We truncate at 24 chars because some Kubernetes name fields are limited to this
 {{- $name := default .Chart.Name .Values.nameOverride -}}
 {{- printf "%s-%s" .Release.Name $name | trunc 24 | trimSuffix "-" -}}
 {{- end -}}
+
+
+{{/*
+This is a template with config parameters for optional features in fission. This gets mounted on to the controller pod
+as a config map.
+To add new features with config parameters, create a yaml block below with the feature name and define a corresponding struct in
+controller/config.go
+*/}}
+{{- define "config" -}}
+canary:
+  enabled: {{ .Values.canaryDeployment.enabled }}
+  {{- if .Values.prometheusDeploy }}
+  prometheusSvc: "http://{{ .Release.Name }}-prometheus-server.{{ .Release.Namespace }}"
+  {{- end }}
+  {{- printf "\n" -}}
+{{- end -}}
+