W0421 03:41:29.344447       1 deprecated.go:66] 
==== Removed Flag Warning ======================

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

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I0421 03:41:29.344781       1 kube-rbac-proxy.go:233] Valid token audiences: 
I0421 03:41:29.345549       1 kube-rbac-proxy.go:347] Reading certificate files
I0421 03:41:29.345730       1 kube-rbac-proxy.go:395] Starting TCP socket on :8443
I0421 03:41:29.345887       1 kube-rbac-proxy.go:402] Listening securely on :8443