1. Proposed title of this feature request
document metrics to measure the performance of ovn-kubernetes and OVN

2. What is the nature and description of the request?
document how to use ovs/ovn/ovnk metrics to know how to spot performance issues

3. Why does the customer need this? (List the business requirements here)
we run big clusters with ovn-kubernetes on Azure. While scaling up we hit various performance issues (eg lately
https://issues.redhat.com/browse/FDP-399
or
https://issues.redhat.com/browse/FDP-509
). For these particular performance issues we found that we could monitor metric ovs_vswitchd_interface_up_wait_seconds_total to find which node was affected. But this is some ad-hoc metric.

We would like to know your advice regarding the ovs/ovn metrics we could monitor to detect performance issues on our clusters. Our goal is to set-up alerting and be more reactive in case the cluster performance degrades

4. List any affected packages or components.
OCP / ovn-kubernetes documentation