Merge pull request #91349 from neolit123/1.19-fail-on-unrecognized-args

cmd/*: fail on unrecognized flags/arguments for component CLI

cmd/kube-apiserver/app/server.go

@@ -117,6 +117,14 @@ cluster's shared state through which all other components interact.`,
 
 			return Run(completedOptions, genericapiserver.SetupSignalHandler())
 		},
+		Args: func(cmd *cobra.Command, args []string) error {
+			for _, arg := range args {
+				if len(arg) > 0 {
+					return fmt.Errorf("%q does not take any arguments, got %q", cmd.CommandPath(), args)
+				}
+			}
+			return nil
+		},
 	}
 
 	fs := cmd.Flags()