Helm chart: Added service monitor (grafana#824)

* Helm chart: Added service monitor

* Bumped loki-stack chart version

* Bumped loki chart version

production/helm/loki-stack/Chart.yaml

@@ -1,5 +1,5 @@
 name: loki-stack
-version: 0.12.0
+version: 0.13.0
 appVersion: 0.0.1
 kubeVersion: "^1.10.0-0"
 description: "Loki: like Prometheus, but for logs."

production/helm/loki/Chart.yaml

@@ -1,5 +1,5 @@
 name: loki
-version: 0.11.0
+version: 0.12.0
 appVersion: 0.0.1
 kubeVersion: "^1.10.0-0"
 description: "Loki: like Prometheus, but for logs."

production/helm/loki/templates/servicemonitor.yaml

@@ -0,0 +1,24 @@
+{{- if .Values.serviceMonitor.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ template "loki.fullname" . }}
+  labels:
+    app: {{ template "loki.name" . }}
+    chart: {{ template "loki.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  selector:
+    matchLabels:
+      app: {{ template "loki.name" . }}
+      release: {{ .Release.Name | quote }}
+  namespaceSelector:
+    matchNames:
+      - {{ .Release.Namespace | quote }}
+  endpoints:
+  - port: http-metrics
+    {{- if .Values.serviceMonitor.interval }}
+    interval: {{ .Values.serviceMonitor.interval }}
+    {{- end }}
+{{- end }}

production/helm/loki/values.yaml

@@ -164,3 +164,7 @@ podDisruptionBudget: {}
 
 updateStrategy:
   type: RollingUpdate
+
+serviceMonitor:
+  enabled: false
+  interval: ""