add prometheus datasource

deploy/grafana/kustomization.yaml

@@ -6,3 +6,4 @@ resources:
   - grafana-ingress.yaml
   - grafana-pvc.yaml
   - grafana-svc.yaml
+  - prometheus-ds.yaml

deploy/grafana/prometheus-ds.yaml

@@ -0,0 +1,8 @@
+apiVersion: 1
+datasources:
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    url: http://prometheus-k8s.monitoring:9090
+    isDefault: true
+    editable: false