clusterConfigCmd.PersistentFlags().StringVar(&subset, "subset", "", "Filter clusters by substring of Subset field")
	clusterConfigCmd.PersistentFlags().IntVar(&port, "port", 0, "Filter clusters by Port field")
	clusterConfigCmd.PersistentFlags().StringVarP(&configDumpFile, "file", "f", "",
		"Envoy config dump JSON file")

	return clusterConfigCmd
}