W0508 00:21:52.392192       1 deprecated.go:66] 
==== Removed Flag Warning ======================

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

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I0508 00:21:52.392921       1 kube-rbac-proxy.go:235] Valid token audiences: 
I0508 00:21:52.394337       1 kube-rbac-proxy.go:349] Reading certificate files
I0508 00:21:52.394847       1 kube-rbac-proxy.go:397] Starting TCP socket on 0.0.0.0:8443
I0508 00:21:52.395242       1 kube-rbac-proxy.go:404] Listening securely on 0.0.0.0:8443