Make the service account optional

charts/flagger/templates/_helpers.tpl

@@ -1,4 +1,10 @@
-{{/* vim: set filetype=mustache: */}}
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "flagger.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
 {{/*
 Expand the name of the chart.
 */}}
@@ -25,8 +31,12 @@ If release name contains chart name it will be used as a full name.
 {{- end -}}
 
 {{/*
-Create chart name and version as used by the chart label.
+Create the name of the service account to use
 */}}
-{{- define "flagger.chart" -}}
-{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- define "flagger.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create -}}
+    {{ default (include "flagger.fullname" .) .Values.serviceAccount.name }}
+{{- else -}}
+    {{ default "default" .Values.serviceAccount.name }}
 {{- end -}}
+{{- end -}}

charts/flagger/templates/account.yaml

@@ -1,9 +1,12 @@
+{{- if .Values.serviceAccount.create }}
 apiVersion: v1
 kind: ServiceAccount
 metadata:
-  name: {{ template "flagger.name" . }}
+  name: {{ template "flagger.serviceAccountName" . }}
   labels:
-    app: {{ template "flagger.name" . }}
-    chart: {{ template "flagger.chart" . }}
-    release: {{ .Release.Name }}
-    heritage: {{ .Release.Service }}
+    helm.sh/chart: {{ template "flagger.chart" . }}
+    app.kubernetes.io/name: {{ template "flagger.name" . }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/version: {{ .Chart.AppVersion }}
+{{- end }}

charts/flagger/templates/rbac.yaml

@@ -29,7 +29,7 @@ roleRef:
   kind: ClusterRole
   name: {{ template "flagger.fullname" . }}
 subjects:
-- name: {{ template "flagger.name" . }}
-  namespace: {{ .Release.Namespace | quote }}
+- name: {{ template "flagger.serviceAccountName" . }}
+  namespace: {{ .Release.Namespace }}
   kind: ServiceAccount
 {{- end }}

charts/flagger/values.yaml

@@ -14,10 +14,18 @@ slack:
   # incoming webhook https://api.slack.com/incoming-webhooks
   url:
 
-crd:
+serviceAccount:
+  # serviceAccount.create: Whether to create a service account or not
   create: true
+  # serviceAccount.name: The name of the service account to create or use
+  name: ""
 
 rbac:
+  # rbac.create: `true` if rbac resources should be created
+  create: true
+
+crd:
+  # crd.create: `true` if custom resource definitions should be created
   create: true
 
 nameOverride: ""