[concourse] Add service which targets prometheus port when prometheus metrics are enabled

stable/concourse/Chart.yaml

@@ -1,5 +1,5 @@
 name: concourse
-version: 1.10.1
+version: 1.11.0
 appVersion: 3.14.1
 description: Concourse is a simple and scalable CI system.
 icon: https://avatars1.githubusercontent.com/u/7809479

stable/concourse/templates/_helpers.tpl

@@ -20,6 +20,11 @@ We truncate at 63 chars because some Kubernetes name fields are limited to this
 {{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
 {{- end -}}
 
+{{- define "concourse.prometheus.fullname" -}}
+{{- $name := default "web" .Values.web.nameOverride -}}
+{{- printf "%s-%s-prometheus" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
 {{- define "concourse.worker.fullname" -}}
 {{- $name := default "worker" .Values.worker.nameOverride -}}
 {{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}

stable/concourse/templates/web-prometheus-svc.yaml

@@ -0,0 +1,19 @@
+{{- if .Values.web.metrics.prometheus.enabled }}
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "concourse.prometheus.fullname" . }}
+  labels:
+    app: {{ template "concourse.prometheus.fullname" . }}
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+spec:
+  clusterIP: "None"
+  ports:
+    - name: prometheus
+      port: {{ .Values.web.metrics.prometheus.port }}
+      targetPort: prometheus
+  selector:
+    app: {{ template "concourse.web.fullname" . }}
+{{- end -}}