Merge pull request #655 from brancz/patch-1

Add additional metrics guideline violations to metrics overhaul

keps/sig-instrumentation/0031-kubernetes-metrics-overhaul.md

@@ -96,6 +96,10 @@ https://github.com/kubernetes/kubernetes/issues/68522
 
 https://github.com/kubernetes/kubernetes/pull/63924
 
+#### Prober metrics
+
+Make prober metrics introduced in https://github.com/kubernetes/kubernetes/pull/61369 conform to the [Kubernetes instrumentation guidelines](https://github.com/kubernetes/community/blob/master/contributors/devel/instrumentation.md).
+
 ### Risks and Mitigations
 
 Risks include users upgrading Kubernetes, but not updating their usage of Kubernetes exposed metrics in alerting and dashboarding potentially causing incidents to go unnoticed.
@@ -108,4 +112,4 @@ All metrics exposed by components from kubernetes/kubernetes follow Prometheus b
 
 ## Implementation History
 
-Multiple pull requests have already been opened, but not merged as of writing of this document.
+Multiple pull requests have already been opened, but not merged as of writing of this document.