W0429 23:07:31.386028       1 deprecated.go:66] 
==== Removed Flag Warning ======================

logtostderr is removed in the k8s upstream and has no effect any more.

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I0429 23:07:31.386506       1 kube-rbac-proxy.go:235] Valid token audiences: 
I0429 23:07:31.387551       1 kube-rbac-proxy.go:349] Reading certificate files
I0429 23:07:31.387818       1 kube-rbac-proxy.go:397] Starting TCP socket on :8443
I0429 23:07:31.388089       1 kube-rbac-proxy.go:404] Listening securely on :8443