Add 'contrib/kube-prometheus/' from commit '81c0d2f4d30f63a4e274c2870c5afc89241827b0'

git-subtree-dir: contrib/kube-prometheus
git-subtree-mainline: 050ca21276696c8603375c699513ec487301ed62
git-subtree-split: 81c0d2f4d3

assets/grafana/prometheus-datasource.json

@@ -0,0 +1,7 @@
+{
+    "access": "proxy",
+    "basicAuth": false,
+    "name": "prometheus",
+    "type": "prometheus",
+    "url": "http://prometheus-k8s.monitoring.svc:9090"
+}