Add PrometheusRule and ServiceMonitor to common (#47)

* Add PrometheusRule and ServiceMonitor to common

* Bump Kind version

charts/common/templates/_all.tpl

@@ -55,4 +55,12 @@ Main entrypoint for the common library chart. It will render all underlying temp
   {{- if .Values.secret -}}
     {{ include "common.secret" .  | nindent 0 }}
   {{- end -}}
+
+  {{- if .Values.metrics.enabled -}}
+    {{ include "common.serviceMonitor" .  | nindent 0 }}
+  {{- end -}}
+
+  {{- if and .Values.metrics.enabled .Values.metrics.prometheusRule.enabled -}}
+    {{ include "common.prometheusRule" .  | nindent 0 }}
+  {{- end -}}
 {{- end -}}

charts/common/templates/_prometheusrule.tpl

@@ -0,0 +1,19 @@
+{{- define "common.prometheusRule" }}
+---
+apiVersion: monitoring.coreos.com/v1
+kind: PrometheusRule
+metadata:
+  name: {{ include "common.names.fullname" . }}
+  labels:
+    {{- include "common.labels" . | nindent 4 }}
+    {{- with .Values.metrics.prometheusRule.labels }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
+spec:
+  groups:
+    - name: {{ include "common.names.fullname" . }}
+      rules:
+        {{- with .Values.metrics.prometheusRule.rules }}
+        {{- toYaml . | nindent 8 }}
+        {{- end }}
+{{- end }}

charts/common/templates/_servicemonitor.tpl

@@ -0,0 +1,25 @@
+{{- define "common.serviceMonitor" }}
+---
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ include "common.names.fullname" . }}
+  labels:
+    {{- include "common.labels" . | nindent 4 }}
+    {{- with .Values.metrics.serviceMonitor.labels }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
+spec:
+  selector:
+    matchLabels:
+      {{- include "common.labels.selectorLabels" . | nindent 6 }}
+  endpoints:
+    - port: metrics
+      {{- with .Values.metrics.serviceMonitor.interval }}
+      interval: {{ . }}
+      {{- end }}
+      {{- with .Values.metrics.serviceMonitor.scrapeTimeout }}
+      scrapeTimeout: {{ . }}
+      {{- end }}
+      path: /metrics
+{{- end }}