diff --git a/daemon/auth.go b/daemon/auth.go
index d32c28b8dd..e97d888371 100644
--- a/daemon/auth.go
+++ b/daemon/auth.go
@@ -9,5 +9,5 @@ import (
 
 // AuthenticateToRegistry checks the validity of credentials in authConfig
 func (daemon *Daemon) AuthenticateToRegistry(ctx context.Context, authConfig *types.AuthConfig) (string, string, error) {
-	return daemon.RegistryService.Auth(ctx, authConfig, dockerversion.DockerUserAgent(ctx))
+	return daemon.registryService.Auth(ctx, authConfig, dockerversion.DockerUserAgent(ctx))
 }
diff --git a/daemon/daemon.go b/daemon/daemon.go
index 126b78f55f..f0ca5d8503 100644
--- a/daemon/daemon.go
+++ b/daemon/daemon.go
@@ -78,7 +78,7 @@ var (
 
 // Daemon holds information about the Docker daemon.
 type Daemon struct {
-	ID                    string
+	id                    string
 	repository            string
 	containers            container.Store
 	containersReplica     container.ViewDB
@@ -88,7 +88,7 @@ type Daemon struct {
 	configStore           *config.Config
 	statsCollector        *stats.Collector
 	defaultLogConfig      containertypes.LogConfig
-	RegistryService       registry.Service
+	registryService       registry.Service
 	EventsService         *events.Events
 	netController         libnetwork.NetworkController
 	volumes               *volumesservice.VolumesService
@@ -852,7 +852,7 @@ func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.S
 		}
 	}
 
-	d.RegistryService = registryService
+	d.registryService = registryService
 	logger.RegisterPluginGetter(d.PluginStore)
 
 	metricsSockPath, err := d.listenMetricsSock()
@@ -1021,7 +1021,7 @@ func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.S
 		return nil, errors.New("Devices cgroup isn't mounted")
 	}
 
-	d.ID = trustKey.PublicKey().KeyID()
+	d.id = trustKey.PublicKey().KeyID()
 	d.repository = daemonRepo
 	d.containers = container.NewMemoryStore()
 	if d.containersReplica, err = container.NewViewDB(); err != nil {
diff --git a/daemon/events.go b/daemon/events.go
index 9b76fdbb97..169b7348a1 100644
--- a/daemon/events.go
+++ b/daemon/events.go
@@ -91,7 +91,7 @@ func (daemon *Daemon) LogDaemonEventWithAttributes(action string, attributes map
 			attributes["name"] = info.Name
 		}
 		actor := events.Actor{
-			ID:         daemon.ID,
+			ID:         daemon.id,
 			Attributes: attributes,
 		}
 		daemon.EventsService.Log(action, events.DaemonEventType, actor)
diff --git a/daemon/info.go b/daemon/info.go
index 4be6ec0c80..b294eaab01 100644
--- a/daemon/info.go
+++ b/daemon/info.go
@@ -32,7 +32,7 @@ func (daemon *Daemon) SystemInfo() *types.Info {
 	sysInfo := daemon.RawSysInfo()
 
 	v := &types.Info{
-		ID:                 daemon.ID,
+		ID:                 daemon.id,
 		Images:             daemon.imageService.CountImages(),
 		IPv4Forwarding:     !sysInfo.IPv4ForwardingDisabled,
 		BridgeNfIptables:   !sysInfo.BridgeNFCallIPTablesDisabled,
@@ -50,7 +50,7 @@ func (daemon *Daemon) SystemInfo() *types.Info {
 		IndexServerAddress: registry.IndexServer,
 		OSType:             platform.OSType,
 		Architecture:       platform.Architecture,
-		RegistryConfig:     daemon.RegistryService.ServiceConfig(),
+		RegistryConfig:     daemon.registryService.ServiceConfig(),
 		NCPU:               sysinfo.NumCPU(),
 		MemTotal:           memInfo().MemTotal,
 		GenericResources:   daemon.genericResources,
diff --git a/daemon/reload.go b/daemon/reload.go
index cabcf16266..55454bab5b 100644
--- a/daemon/reload.go
+++ b/daemon/reload.go
@@ -184,7 +184,7 @@ func (daemon *Daemon) reloadAllowNondistributableArtifacts(conf *config.Config,
 	// Update corresponding configuration.
 	if conf.IsValueSet("allow-nondistributable-artifacts") {
 		daemon.configStore.AllowNondistributableArtifacts = conf.AllowNondistributableArtifacts
-		if err := daemon.RegistryService.LoadAllowNondistributableArtifacts(conf.AllowNondistributableArtifacts); err != nil {
+		if err := daemon.registryService.LoadAllowNondistributableArtifacts(conf.AllowNondistributableArtifacts); err != nil {
 			return err
 		}
 	}
@@ -209,7 +209,7 @@ func (daemon *Daemon) reloadInsecureRegistries(conf *config.Config, attributes m
 	// update corresponding configuration
 	if conf.IsValueSet("insecure-registries") {
 		daemon.configStore.InsecureRegistries = conf.InsecureRegistries
-		if err := daemon.RegistryService.LoadInsecureRegistries(conf.InsecureRegistries); err != nil {
+		if err := daemon.registryService.LoadInsecureRegistries(conf.InsecureRegistries); err != nil {
 			return err
 		}
 	}
@@ -234,7 +234,7 @@ func (daemon *Daemon) reloadRegistryMirrors(conf *config.Config, attributes map[
 	// update corresponding configuration
 	if conf.IsValueSet("registry-mirrors") {
 		daemon.configStore.Mirrors = conf.Mirrors
-		if err := daemon.RegistryService.LoadMirrors(conf.Mirrors); err != nil {
+		if err := daemon.registryService.LoadMirrors(conf.Mirrors); err != nil {
 			return err
 		}
 	}
diff --git a/daemon/reload_test.go b/daemon/reload_test.go
index 96124b36fa..0683f53788 100644
--- a/daemon/reload_test.go
+++ b/daemon/reload_test.go
@@ -58,7 +58,7 @@ func TestDaemonReloadAllowNondistributableArtifacts(t *testing.T) {
 
 	var err error
 	// Initialize daemon with some registries.
-	daemon.RegistryService, err = registry.NewService(registry.ServiceOptions{
+	daemon.registryService, err = registry.NewService(registry.ServiceOptions{
 		AllowNondistributableArtifacts: []string{
 			"127.0.0.0/8",
 			"10.10.1.11:5000",
@@ -95,7 +95,7 @@ func TestDaemonReloadAllowNondistributableArtifacts(t *testing.T) {
 	}
 
 	var actual []string
-	serviceConfig := daemon.RegistryService.ServiceConfig()
+	serviceConfig := daemon.registryService.ServiceConfig()
 	for _, value := range serviceConfig.AllowNondistributableArtifactsCIDRs {
 		actual = append(actual, value.String())
 	}
@@ -113,7 +113,7 @@ func TestDaemonReloadMirrors(t *testing.T) {
 	muteLogs()
 
 	var err error
-	daemon.RegistryService, err = registry.NewService(registry.ServiceOptions{
+	daemon.registryService, err = registry.NewService(registry.ServiceOptions{
 		InsecureRegistries: []string{},
 		Mirrors: []string{
 			"https://mirror.test1.example.com",
@@ -180,7 +180,7 @@ func TestDaemonReloadMirrors(t *testing.T) {
 				// mirrors should be valid, should be no error
 				t.Fatal(err)
 			}
-			registryService := daemon.RegistryService.ServiceConfig()
+			registryService := daemon.registryService.ServiceConfig()
 
 			if len(registryService.Mirrors) != len(value.after) {
 				t.Fatalf("Expected %d daemon mirrors %s while get %d with %s",
@@ -215,7 +215,7 @@ func TestDaemonReloadInsecureRegistries(t *testing.T) {
 
 	var err error
 	// initialize daemon with existing insecure registries: "127.0.0.0/8", "10.10.1.11:5000", "10.10.1.22:5000"
-	daemon.RegistryService, err = registry.NewService(registry.ServiceOptions{
+	daemon.registryService, err = registry.NewService(registry.ServiceOptions{
 		InsecureRegistries: []string{
 			"127.0.0.0/8",
 			"10.10.1.11:5000",
@@ -256,7 +256,7 @@ func TestDaemonReloadInsecureRegistries(t *testing.T) {
 
 	// After Reload, daemon.RegistryService will be changed which is useful
 	// for registry communication in daemon.
-	registries := daemon.RegistryService.ServiceConfig()
+	registries := daemon.registryService.ServiceConfig()
 
 	// After Reload(), newConfig has come to registries.InsecureRegistryCIDRs and registries.IndexConfigs in daemon.
 	// Then collect registries.InsecureRegistryCIDRs in dataMap.