W0521 23:10:47.400588       1 deprecated.go:66] 
==== Removed Flag Warning ======================

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

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I0521 23:10:47.401043       1 kube-rbac-proxy.go:235] Valid token audiences: 
I0521 23:10:47.401927       1 kube-rbac-proxy.go:349] Reading certificate files
I0521 23:10:47.402177       1 kube-rbac-proxy.go:397] Starting TCP socket on :8443
I0521 23:10:47.402370       1 kube-rbac-proxy.go:404] Listening securely on :8443