Add alerts for influxdb

Change-Id: I564da44ba59653a43dd9bb5d727f4453ba90fa48
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index b99c6a7..e85fc7b 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -13,3 +13,5 @@
         enabled: true
       telegraf:
         enabled: true
+      prometheus:
+        enabled: true