@@ -64,6 +64,16 @@ var skipValidateOptions = map[string]bool{

 	"features": true,

 }

+// skipDuplicates contains configuration keys that

+// will be skipped when checking duplicated

+// configuration field defined in both daemon

+// config file and from dockerd cli flags.

+// This allows some configurations to be merged

+// during the parsing.

+var skipDuplicates = map[string]bool{

+	"runtimes": true,

+}

+

 // LogConfig represents the default log configuration.

 // It includes json tags to deserialize configuration from a file

 // using the same names that the flags in the command line use.

@@ -491,13 +501,13 @@ func findConfigurationConflicts(config map[string]interface{}, flags *pflag.Flag

 	duplicatedConflicts := func(f *pflag.Flag) {

 		// search option name in the json configuration payload if the value is a named option

 		if namedOption, ok := f.Value.(opts.NamedOption); ok {

-			if optsValue, ok := config[namedOption.Name()]; ok {

+			if optsValue, ok := config[namedOption.Name()]; ok && !skipDuplicates[namedOption.Name()] {

 				conflicts = append(conflicts, printConflict(namedOption.Name(), f.Value.String(), optsValue))

 			}

 		} else {

 			// search flag name in the json configuration payload

 			for _, name := range []string{f.Name, f.Shorthand} {

-				if value, ok := config[name]; ok {

+				if value, ok := config[name]; ok && !skipDuplicates[name] {

 					conflicts = append(conflicts, printConflict(name, f.Value.String(), value))

 					break

 				}