diff --git a/deploy/truenas/core/grafana/provisioning/datasources/prometheus.yml b/deploy/truenas/core/grafana/provisioning/datasources/prometheus.yml
new file mode 100644
index 0000000..623d51d
--- /dev/null
+++ b/deploy/truenas/core/grafana/provisioning/datasources/prometheus.yml
@@ -0,0 +1,8 @@
+apiVersion: 1
+datasources:
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    url: http://prom:9090
+    isDefault: true
+    editable: false