W0401 12:47:57.488887       1 deprecated.go:66] 
==== Removed Flag Warning ======================

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

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I0401 12:47:57.489054       1 kube-rbac-proxy.go:532] Reading config file: /etc/kubernetes/crio-metrics-proxy.cfg
I0401 12:47:57.491413       1 kube-rbac-proxy.go:235] Valid token audiences: 
I0401 12:47:57.491760       1 dynamic_cafile_content.go:161] "Starting controller" name="client-ca::/etc/kubernetes/kubelet-ca.crt"
I0401 12:47:57.492825       1 kube-rbac-proxy.go:349] Reading certificate files
I0401 12:47:57.493000       1 kube-rbac-proxy.go:397] Starting TCP socket on :9637
I0401 12:47:57.493187       1 kube-rbac-proxy.go:404] Listening securely on :9637