add command line args --kube-api-qps/--kube-api-burst

[novegit]

Using kube-rbac-proxy in front of a prometheus in a multi tenant environment causes often client-side throttling events, that slow down connections, when more than 10 queries per second are coming in. Only way to mitigate is to increase the number of replicas of the kube-rbac-proxy pods.

Example for client-side throttling:
I0318 12:32:18.188838 800 request.go:629] Waited for 993.646183ms due to client-side throttling, not priority and fairness, request: POST:https://172.30.0.1:443/apis/authorization.k8s.io/v1/subjectaccessreviews
I0318 12:32:18.192938 800 round_trippers.go:553] POST https://172.30.0.1:443/apis/authorization.k8s.io/v1/subjectaccessreviews 201 Created in 3 milliseconds
I0318 12:32:19.189607 800 request.go:629] Waited for 1.994365552s due to client-side throttling, not priority and fairness, request: POST:https://172.30.0.1:443/apis/authorization.k8s.io/v1/subjectaccessreviews

with the new parameters, the queries per second can be set above the default kube-client default value of 10 qps.
--kube-api-qps
--kube-api-burst

[ibihim]

@novegit, those are the same flags as used in kube, right?

Cool. Thx for the contribution.

[ibihim]

@novegit, nice try 😆 You need to run make generate and commit the README.md changes.

Go / Generate Failed

[novegit]

should work now.

[novegit]

@novegit, those are the same flags as used in kube, right?

Cool. Thx for the contribution.

yes, on my first try, I only added 'qps'. An error message appeared, that also 'burst' must be set, when 'qps' is set.