diff --git a/cluster/longhorn-system/serviceMonitor.yaml b/cluster/longhorn-system/serviceMonitor.yaml
new file mode 100644
index 000000000..88cb3b696
--- /dev/null
+++ b/cluster/longhorn-system/serviceMonitor.yaml
@@ -0,0 +1,16 @@
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: longhorn-prometheus-servicemonitor
+  namespace: longhorn-system
+  labels:
+    name: longhorn-prometheus-servicemonitor
+spec:
+  selector:
+    matchLabels:
+      app: longhorn-manager
+  namespaceSelector:
+    matchNames:
+    - longhorn-system
+  endpoints:
+  - port: manager