Fix for kube-proxy to wait for some duration for the node to be defined

Kube-proxy must atleast wait for some duration for the node to defined so that it can fetch the node IP. This node IP is currently used in ipvs proxier for the node-port services.

cmd/kube-proxy/app/server_others.go

@@ -143,6 +143,9 @@ func newProxyServer(
 	nodeIP := net.ParseIP(config.BindAddress)
 	if nodeIP.IsUnspecified() {
 		nodeIP = utilnode.GetNodeIP(client, hostname)
+		if nodeIP == nil {
+			return nil, fmt.Errorf("unable to get node IP for hostname %s", hostname)
+		}
 	}
 	if proxyMode == proxyModeIPTables {
 		klog.V(0).Info("Using iptables Proxier.")