update
diff --git a/charts/postgresql/templates/prometheusrule.yaml b/charts/postgresql/templates/prometheusrule.yaml
new file mode 100644
index 0000000..24be710
--- /dev/null
+++ b/charts/postgresql/templates/prometheusrule.yaml
@@ -0,0 +1,22 @@
+{{- if and .Values.metrics.enabled .Values.metrics.prometheusRule.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: PrometheusRule
+metadata:
+  name: {{ include "common.names.fullname" . }}
+  namespace: {{ default .Release.Namespace .Values.metrics.prometheusRule.namespace | quote }}
+  labels: {{- include "common.labels.standard" . | nindent 4 }}
+    app.kubernetes.io/component: metrics
+    {{- if .Values.commonLabels }}
+    {{- include "common.tplvalues.render" ( dict "value" .Values.commonLabels "context" $ ) | nindent 4 }}
+    {{- end }}
+    {{- if .Values.metrics.prometheusRule.labels }}
+    {{- include "common.tplvalues.render" ( dict "value" .Values.metrics.prometheusRule.labels "context" $ ) | nindent 4 }}
+    {{- end }}
+  {{- if .Values.commonAnnotations }}
+  annotations: {{- include "common.tplvalues.render" ( dict "value" .Values.commonAnnotations "context" $ ) | nindent 4 }}
+  {{- end }}
+spec:
+  groups:
+    - name: {{ include "common.names.fullname" . }}
+      rules: {{- include "common.tplvalues.render" ( dict "value" .Values.metrics.prometheusRule.rules "context" $ ) | nindent 8 }}
+{{- end }}