W0424 14:58:52.506504       1 deprecated.go:66] 
==== Removed Flag Warning ======================

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

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I0424 14:58:52.507274       1 kube-rbac-proxy.go:235] Valid token audiences: 
I0424 14:58:52.511055       1 kube-rbac-proxy.go:349] Reading certificate files
I0424 14:58:52.511394       1 kube-rbac-proxy.go:397] Starting TCP socket on :9154
I0424 14:58:52.511721       1 kube-rbac-proxy.go:404] Listening securely on :9154