func (container *Container) getLogger() (logger.Logger, error) {
	if container.logDriver != nil && container.IsRunning() {
		return container.logDriver, nil
	}
	cfg := container.getLogConfig()
	if err := logger.ValidateLogOpts(cfg.Type, cfg.Config); err != nil {
		return nil, err
	}
	c, err := logger.GetLogDriver(cfg.Type)
	if err != nil {
		return nil, fmt.Errorf("Failed to get logging factory: %v", err)
	}
	ctx := logger.Context{
		Config:              cfg.Config,
		ContainerID:         container.ID,
		ContainerName:       container.Name,
		ContainerEntrypoint: container.Path,
		ContainerArgs:       container.Args,
		ContainerImageID:    container.ImageID,
		ContainerImageName:  container.Config.Image,
		ContainerCreated:    container.Created,
	}

	// Set logging file for "json-logger"
	if cfg.Type == jsonfilelog.Name {
		ctx.LogPath, err = container.getRootResourcePath(fmt.Sprintf("%s-json.log", container.ID))
		if err != nil {
			return nil, err
		}
	}
	return c(ctx)
}

func initLogCreator(factory *PodFactory, spec *apitypes.UserPod) logger.Creator {
	if spec.Log.Type == "" {
		spec.Log.Type = factory.logCfg.Type
		spec.Log.Config = factory.logCfg.Config
	}
	factory.logCfg.Config = spec.Log.Config

	if spec.Log.Type == "none" {
		return nil
	}

	var (
		creator logger.Creator
		err     error
	)

	if err = logger.ValidateLogOpts(spec.Log.Type, spec.Log.Config); err != nil {
		hlog.Log(ERROR, "invalid log options for pod %s. type: %s; options: %#v", spec.Id, spec.Log.Type, spec.Log.Config)
		return nil
	}
	creator, err = logger.GetLogDriver(spec.Log.Type)
	if err != nil {
		hlog.Log(ERROR, "cannot create logCreator for pod %s. type: %s; err: %v", spec.Id, spec.Log.Type, err)
		return nil
	}
	hlog.Log(DEBUG, "configuring log driver [%s] for %s", spec.Log.Type, spec.Id)

	return creator
}

// StartLogging initializes and starts the container logging stream.
func (daemon *Daemon) StartLogging(container *container.Container) error {
	cfg := container.GetLogConfig(daemon.defaultLogConfig)
	if cfg.Type == "none" {
		return nil // do not start logging routines
	}

	if err := logger.ValidateLogOpts(cfg.Type, cfg.Config); err != nil {
		return err
	}
	l, err := container.StartLogger(cfg)
	if err != nil {
		return fmt.Errorf("Failed to initialize logging driver: %v", err)
	}

	copier := logger.NewCopier(container.ID, map[string]io.Reader{"stdout": container.StdoutPipe(), "stderr": container.StderrPipe()}, l)
	container.LogCopier = copier
	copier.Run()
	container.LogDriver = l

	// set LogPath field only for json-file logdriver
	if jl, ok := l.(*jsonfilelog.JSONFileLogger); ok {
		container.LogPath = jl.LogPath()
	}

	return nil
}

func (daemon *Daemon) getLogger(container *container.Container) (logger.Logger, error) {
	if container.LogDriver != nil && container.IsRunning() {
		return container.LogDriver, nil
	}
	cfg := container.GetLogConfig(daemon.defaultLogConfig)
	if err := logger.ValidateLogOpts(cfg.Type, cfg.Config); err != nil {
		return nil, err
	}
	return container.StartLogger(cfg)
}

// mergeLogConfig merges the daemon log config to the container's log config if the container's log driver is not specified.
func (daemon *Daemon) mergeAndVerifyLogConfig(cfg *containertypes.LogConfig) error {
	if cfg.Type == "" {
		cfg.Type = daemon.defaultLogConfig.Type
	}

	if cfg.Type == daemon.defaultLogConfig.Type {
		for k, v := range daemon.defaultLogConfig.Config {
			if _, ok := cfg.Config[k]; !ok {
				cfg.Config[k] = v
			}
		}
	}

	return logger.ValidateLogOpts(cfg.Type, cfg.Config)
}

// verifyContainerSettings performs validation of the hostconfig and config
// structures.
func (daemon *Daemon) verifyContainerSettings(hostConfig *containertypes.HostConfig, config *containertypes.Config, update bool) ([]string, error) {

	// First perform verification of settings common across all platforms.
	if config != nil {
		if config.WorkingDir != "" {
			config.WorkingDir = filepath.FromSlash(config.WorkingDir) // Ensure in platform semantics
			if !system.IsAbs(config.WorkingDir) {
				return nil, fmt.Errorf("The working directory '%s' is invalid. It needs to be an absolute path", config.WorkingDir)
			}
		}

		if len(config.StopSignal) > 0 {
			_, err := signal.ParseSignal(config.StopSignal)
			if err != nil {
				return nil, err
			}
		}
	}

	if hostConfig == nil {
		return nil, nil
	}

	logCfg := daemon.getLogConfig(hostConfig.LogConfig)
	if err := logger.ValidateLogOpts(logCfg.Type, logCfg.Config); err != nil {
		return nil, err
	}

	for port := range hostConfig.PortBindings {
		_, portStr := nat.SplitProtoPort(string(port))
		if _, err := nat.ParsePort(portStr); err != nil {
			return nil, fmt.Errorf("Invalid port specification: %q", portStr)
		}
		for _, pb := range hostConfig.PortBindings[port] {
			_, err := nat.NewPort(nat.SplitProtoPort(pb.HostPort))
			if err != nil {
				return nil, fmt.Errorf("Invalid port specification: %q", pb.HostPort)
			}
		}
	}

	// Now do platform-specific verification
	return verifyPlatformContainerSettings(daemon, hostConfig, config, update)
}

func (cli *DaemonCli) start(opts daemonOptions) (err error) {
	stopc := make(chan bool)
	defer close(stopc)

	// warn from uuid package when running the daemon
	uuid.Loggerf = logrus.Warnf

	opts.common.SetDefaultOptions(opts.flags)

	if opts.common.TrustKey == "" {
		opts.common.TrustKey = filepath.Join(
			getDaemonConfDir(),
			cliflags.DefaultTrustKeyFile)
	}
	if cli.Config, err = loadDaemonCliConfig(opts); err != nil {
		return err
	}
	cli.configFile = &opts.configFile
	cli.flags = opts.flags

	if cli.Config.Debug {
		utils.EnableDebug()
	}

	if utils.ExperimentalBuild() {
		logrus.Warn("Running experimental build")
	}

	logrus.SetFormatter(&logrus.TextFormatter{
		TimestampFormat: jsonlog.RFC3339NanoFixed,
		DisableColors:   cli.Config.RawLogs,
	})

	if err := setDefaultUmask(); err != nil {
		return fmt.Errorf("Failed to set umask: %v", err)
	}

	if len(cli.LogConfig.Config) > 0 {
		if err := logger.ValidateLogOpts(cli.LogConfig.Type, cli.LogConfig.Config); err != nil {
			return fmt.Errorf("Failed to set log opts: %v", err)
		}
	}

	if cli.Pidfile != "" {
		pf, err := pidfile.New(cli.Pidfile)
		if err != nil {
			return fmt.Errorf("Error starting daemon: %v", err)
		}
		defer func() {
			if err := pf.Remove(); err != nil {
				logrus.Error(err)
			}
		}()
	}

	serverConfig := &apiserver.Config{
		Logging:     true,
		SocketGroup: cli.Config.SocketGroup,
		Version:     dockerversion.Version,
		EnableCors:  cli.Config.EnableCors,
		CorsHeaders: cli.Config.CorsHeaders,
	}

	if cli.Config.TLS {
		tlsOptions := tlsconfig.Options{
			CAFile:   cli.Config.CommonTLSOptions.CAFile,
			CertFile: cli.Config.CommonTLSOptions.CertFile,
			KeyFile:  cli.Config.CommonTLSOptions.KeyFile,
		}

		if cli.Config.TLSVerify {
			// server requires and verifies client's certificate
			tlsOptions.ClientAuth = tls.RequireAndVerifyClientCert
		}
		tlsConfig, err := tlsconfig.Server(tlsOptions)
		if err != nil {
			return err
		}
		serverConfig.TLSConfig = tlsConfig
	}

	if len(cli.Config.Hosts) == 0 {
		cli.Config.Hosts = make([]string, 1)
	}

	api := apiserver.New(serverConfig)
	cli.api = api

	for i := 0; i < len(cli.Config.Hosts); i++ {
		var err error
		if cli.Config.Hosts[i], err = dopts.ParseHost(cli.Config.TLS, cli.Config.Hosts[i]); err != nil {
			return fmt.Errorf("error parsing -H %s : %v", cli.Config.Hosts[i], err)
		}

		protoAddr := cli.Config.Hosts[i]
		protoAddrParts := strings.SplitN(protoAddr, "://", 2)
		if len(protoAddrParts) != 2 {
			return fmt.Errorf("bad format %s, expected PROTO://ADDR", protoAddr)
		}

//.........这里部分代码省略.........

// CmdDaemon is the daemon command, called the raw arguments after `docker daemon`.
func (cli *DaemonCli) CmdDaemon(args ...string) error {
	// warn from uuid package when running the daemon
	uuid.Loggerf = logrus.Warnf

	if !commonFlags.FlagSet.IsEmpty() || !clientFlags.FlagSet.IsEmpty() {
		// deny `docker -D daemon`
		illegalFlag := getGlobalFlag()
		fmt.Fprintf(os.Stderr, "invalid flag '-%s'.\nSee 'docker daemon --help'.\n", illegalFlag.Names[0])
		os.Exit(1)
	} else {
		// allow new form `docker daemon -D`
		flag.Merge(cli.flags, commonFlags.FlagSet)
	}

	configFile := cli.flags.String([]string{daemonConfigFileFlag}, defaultDaemonConfigFile, "Daemon configuration file")

	cli.flags.ParseFlags(args, true)
	commonFlags.PostParse()

	if commonFlags.TrustKey == "" {
		commonFlags.TrustKey = filepath.Join(getDaemonConfDir(), defaultTrustKeyFile)
	}
	cliConfig, err := loadDaemonCliConfig(cli.Config, cli.flags, commonFlags, *configFile)
	if err != nil {
		fmt.Fprint(os.Stderr, err)
		os.Exit(1)
	}
	cli.Config = cliConfig

	if cli.Config.Debug {
		utils.EnableDebug()
	}

	if utils.ExperimentalBuild() {
		logrus.Warn("Running experimental build")
	}

	logrus.SetFormatter(&logrus.TextFormatter{
		TimestampFormat: jsonlog.RFC3339NanoFixed,
		DisableColors:   cli.Config.RawLogs,
	})

	if err := setDefaultUmask(); err != nil {
		logrus.Fatalf("Failed to set umask: %v", err)
	}

	if len(cli.LogConfig.Config) > 0 {
		if err := logger.ValidateLogOpts(cli.LogConfig.Type, cli.LogConfig.Config); err != nil {
			logrus.Fatalf("Failed to set log opts: %v", err)
		}
	}

	var pfile *pidfile.PIDFile
	if cli.Pidfile != "" {
		pf, err := pidfile.New(cli.Pidfile)
		if err != nil {
			logrus.Fatalf("Error starting daemon: %v", err)
		}
		pfile = pf
		defer func() {
			if err := pfile.Remove(); err != nil {
				logrus.Error(err)
			}
		}()
	}

	serverConfig := &apiserver.Config{
		AuthorizationPluginNames: cli.Config.AuthorizationPlugins,
		Logging:                  true,
		SocketGroup:              cli.Config.SocketGroup,
		Version:                  dockerversion.Version,
	}
	serverConfig = setPlatformServerConfig(serverConfig, cli.Config)

	if cli.Config.TLS {
		tlsOptions := tlsconfig.Options{
			CAFile:   cli.Config.CommonTLSOptions.CAFile,
			CertFile: cli.Config.CommonTLSOptions.CertFile,
			KeyFile:  cli.Config.CommonTLSOptions.KeyFile,
		}

		if cli.Config.TLSVerify {
			// server requires and verifies client's certificate
			tlsOptions.ClientAuth = tls.RequireAndVerifyClientCert
		}
		tlsConfig, err := tlsconfig.Server(tlsOptions)
		if err != nil {
			logrus.Fatal(err)
		}
		serverConfig.TLSConfig = tlsConfig
	}

	if len(cli.Config.Hosts) == 0 {
		cli.Config.Hosts = make([]string, 1)
	}

	api := apiserver.New(serverConfig)

	for i := 0; i < len(cli.Config.Hosts); i++ {
//.........这里部分代码省略.........

// CmdDaemon is the daemon command, called the raw arguments after `docker daemon`.
func (cli *DaemonCli) CmdDaemon(args ...string) error {
	// warn from uuid package when running the daemon
	uuid.Loggerf = logrus.Warnf

	if !commonFlags.FlagSet.IsEmpty() || !clientFlags.FlagSet.IsEmpty() {
		// deny `docker -D daemon`
		illegalFlag := getGlobalFlag()
		fmt.Fprintf(os.Stderr, "invalid flag '-%s'.\nSee 'docker daemon --help'.\n", illegalFlag.Names[0])
		os.Exit(1)
	} else {
		// allow new form `docker daemon -D`
		flag.Merge(daemonFlags, commonFlags.FlagSet)
	}

	daemonFlags.ParseFlags(args, true)
	commonFlags.PostParse()

	if commonFlags.TrustKey == "" {
		commonFlags.TrustKey = filepath.Join(getDaemonConfDir(), defaultTrustKeyFile)
	}

	if utils.ExperimentalBuild() {
		logrus.Warn("Running experimental build")
	}

	logrus.SetFormatter(&logrus.TextFormatter{TimestampFormat: jsonlog.RFC3339NanoFixed})

	if err := setDefaultUmask(); err != nil {
		logrus.Fatalf("Failed to set umask: %v", err)
	}

	if len(cli.LogConfig.Config) > 0 {
		if err := logger.ValidateLogOpts(cli.LogConfig.Type, cli.LogConfig.Config); err != nil {
			logrus.Fatalf("Failed to set log opts: %v", err)
		}
	}

	var pfile *pidfile.PIDFile
	if cli.Pidfile != "" {
		pf, err := pidfile.New(cli.Pidfile)
		if err != nil {
			logrus.Fatalf("Error starting daemon: %v", err)
		}
		pfile = pf
		defer func() {
			if err := pfile.Remove(); err != nil {
				logrus.Error(err)
			}
		}()
	}

	serverConfig := &apiserver.Config{
		AuthZPluginNames: cli.Config.AuthZPlugins,
		Logging:          true,
		Version:          dockerversion.Version,
	}
	serverConfig = setPlatformServerConfig(serverConfig, cli.Config)

	defaultHost := opts.DefaultHost
	if commonFlags.TLSOptions != nil {
		if !commonFlags.TLSOptions.InsecureSkipVerify {
			// server requires and verifies client's certificate
			commonFlags.TLSOptions.ClientAuth = tls.RequireAndVerifyClientCert
		}
		tlsConfig, err := tlsconfig.Server(*commonFlags.TLSOptions)
		if err != nil {
			logrus.Fatal(err)
		}
		serverConfig.TLSConfig = tlsConfig
		defaultHost = opts.DefaultTLSHost
	}

	if len(commonFlags.Hosts) == 0 {
		commonFlags.Hosts = make([]string, 1)
	}
	for i := 0; i < len(commonFlags.Hosts); i++ {
		var err error
		if commonFlags.Hosts[i], err = opts.ParseHost(defaultHost, commonFlags.Hosts[i]); err != nil {
			logrus.Fatalf("error parsing -H %s : %v", commonFlags.Hosts[i], err)
		}
	}
	for _, protoAddr := range commonFlags.Hosts {
		protoAddrParts := strings.SplitN(protoAddr, "://", 2)
		if len(protoAddrParts) != 2 {
			logrus.Fatalf("bad format %s, expected PROTO://ADDR", protoAddr)
		}
		serverConfig.Addrs = append(serverConfig.Addrs, apiserver.Addr{Proto: protoAddrParts[0], Addr: protoAddrParts[1]})
	}
	api, err := apiserver.New(serverConfig)
	if err != nil {
		logrus.Fatal(err)
	}

	if err := migrateKey(); err != nil {
		logrus.Fatal(err)
	}
	cli.TrustKeyPath = commonFlags.TrustKey

	registryService := registry.NewService(cli.registryOptions)
//.........这里部分代码省略.........

// CmdDaemon is the daemon command, called the raw arguments after `docker daemon`.
func (cli *DaemonCli) CmdDaemon(args ...string) error {
	if *flDaemon {
		// allow legacy forms `docker -D -d` and `docker -d -D`
		logrus.Warn("please use 'docker daemon' instead.")
	} else if !commonFlags.FlagSet.IsEmpty() || !clientFlags.FlagSet.IsEmpty() {
		// deny `docker -D daemon`
		illegalFlag := getGlobalFlag()
		fmt.Fprintf(os.Stderr, "invalid flag '-%s'.\nSee 'docker daemon --help'.\n", illegalFlag.Names[0])
		os.Exit(1)
	} else {
		// allow new form `docker daemon -D`
		flag.Merge(daemonFlags, commonFlags.FlagSet)
	}

	daemonFlags.ParseFlags(args, true)
	commonFlags.PostParse()

	if len(commonFlags.Hosts) == 0 {
		commonFlags.Hosts = []string{opts.DefaultHost}
	}
	if commonFlags.TrustKey == "" {
		commonFlags.TrustKey = filepath.Join(getDaemonConfDir(), defaultTrustKeyFile)
	}

	if utils.ExperimentalBuild() {
		logrus.Warn("Running experimental build")
	}

	logrus.SetFormatter(&logrus.TextFormatter{TimestampFormat: timeutils.RFC3339NanoFixed})

	if err := setDefaultUmask(); err != nil {
		logrus.Fatalf("Failed to set umask: %v", err)
	}

	if len(cli.LogConfig.Config) > 0 {
		if err := logger.ValidateLogOpts(cli.LogConfig.Type, cli.LogConfig.Config); err != nil {
			logrus.Fatalf("Failed to set log opts: %v", err)
		}
	}

	var pfile *pidfile.PIDFile
	if cli.Pidfile != "" {
		pf, err := pidfile.New(cli.Pidfile)
		if err != nil {
			logrus.Fatalf("Error starting daemon: %v", err)
		}
		pfile = pf
		defer func() {
			if err := pfile.Remove(); err != nil {
				logrus.Error(err)
			}
		}()
	}

	if cli.LogConfig.Config == nil {
		cli.LogConfig.Config = make(map[string]string)
	}

	serverConfig := &apiserver.ServerConfig{
		Logging:     true,
		EnableCors:  cli.EnableCors,
		CorsHeaders: cli.CorsHeaders,
		Version:     dockerversion.VERSION,
	}
	serverConfig = setPlatformServerConfig(serverConfig, cli.Config)

	if commonFlags.TLSOptions != nil {
		if !commonFlags.TLSOptions.InsecureSkipVerify {
			// server requires and verifies client's certificate
			commonFlags.TLSOptions.ClientAuth = tls.RequireAndVerifyClientCert
		}
		tlsConfig, err := tlsconfig.Server(*commonFlags.TLSOptions)
		if err != nil {
			logrus.Fatalf("foobar: %v", err)
		}
		serverConfig.TLSConfig = tlsConfig
	}

	api := apiserver.New(serverConfig)

	// The serve API routine never exits unless an error occurs
	// We need to start it as a goroutine and wait on it so
	// daemon doesn't exit
	serveAPIWait := make(chan error)
	go func() {
		if err := api.ServeApi(commonFlags.Hosts); err != nil {
			logrus.Errorf("ServeAPI error: %v", err)
			serveAPIWait <- err
			return
		}
		serveAPIWait <- nil
	}()

	if err := migrateKey(); err != nil {
		logrus.Fatal(err)
	}
	cli.TrustKeyPath = commonFlags.TrustKey

	registryService := registry.NewService(cli.registryOptions)
//.........这里部分代码省略.........

func (p *Pod) getLogger(daemon *Daemon) (err error) {
	if p.spec.LogConfig.Type == "" {
		p.spec.LogConfig.Type = daemon.DefaultLog.Type
		p.spec.LogConfig.Config = daemon.DefaultLog.Config
	}

	if p.spec.LogConfig.Type == "none" {
		return nil
	}

	var (
		needLogger []int = []int{}
		creator    logger.Creator
	)

	for i, c := range p.status.Containers {
		if c.Logs.Driver == nil {
			needLogger = append(needLogger, i)
		}
	}

	if len(needLogger) == 0 && p.status.Status == types.S_POD_RUNNING {
		return nil
	}

	if err = logger.ValidateLogOpts(p.spec.LogConfig.Type, p.spec.LogConfig.Config); err != nil {
		return
	}
	creator, err = logger.GetLogDriver(p.spec.LogConfig.Type)
	if err != nil {
		return
	}
	glog.V(1).Infof("configuring log driver [%s] for %s", p.spec.LogConfig.Type, p.id)

	for i, c := range p.status.Containers {
		ctx := logger.Context{
			Config:             p.spec.LogConfig.Config,
			ContainerID:        c.Id,
			ContainerName:      c.Name,
			ContainerImageName: p.spec.Containers[i].Image,
			ContainerCreated:   time.Now(), //FIXME: should record creation time in PodStatus
		}

		if p.containers != nil && len(p.containers) > i {
			ctx.ContainerEntrypoint = p.containers[i].Workdir
			ctx.ContainerArgs = p.containers[i].Cmd
			ctx.ContainerImageID = p.containers[i].Image
		}

		if p.spec.LogConfig.Type == jsonfilelog.Name {
			ctx.LogPath = filepath.Join(p.status.ResourcePath, fmt.Sprintf("%s-json.log", c.Id))
			glog.V(1).Info("configure container log to ", ctx.LogPath)
		}

		if c.Logs.Driver, err = creator(ctx); err != nil {
			return
		}
		glog.V(1).Infof("configured logger for %s/%s (%s)", p.id, c.Id, c.Name)
	}

	return nil
}

// Create creates a new container from the given configuration with a given name.
func (daemon *Daemon) create(params types.ContainerCreateConfig) (retC *container.Container, retErr error) {
	var (
		container *container.Container
		img       *image.Image
		imgID     image.ID
		err       error
	)

	if params.Config.Image != "" {
		img, err = daemon.GetImage(params.Config.Image)
		if err != nil {
			return nil, err
		}
		imgID = img.ID()
	}

	if err := daemon.mergeAndVerifyConfig(params.Config, img); err != nil {
		return nil, err
	}

	if container, err = daemon.newContainer(params.Name, params.Config, imgID); err != nil {
		return nil, err
	}
	defer func() {
		if retErr != nil {
			if err := daemon.ContainerRm(container.ID, &types.ContainerRmConfig{ForceRemove: true}); err != nil {
				logrus.Errorf("Clean up Error! Cannot destroy container %s: %v", container.ID, err)
			}
		}
	}()

	logCfg := container.GetLogConfig(daemon.defaultLogConfig)
	if err := logger.ValidateLogOpts(logCfg.Type, logCfg.Config); err != nil {
		return nil, err
	}

	if err := daemon.setSecurityOptions(container, params.HostConfig); err != nil {
		return nil, err
	}

	// Set RWLayer for container after mount labels have been set
	if err := daemon.setRWLayer(container); err != nil {
		return nil, err
	}

	if err := daemon.Register(container); err != nil {
		return nil, err
	}
	rootUID, rootGID, err := idtools.GetRootUIDGID(daemon.uidMaps, daemon.gidMaps)
	if err != nil {
		return nil, err
	}
	if err := idtools.MkdirAs(container.Root, 0700, rootUID, rootGID); err != nil {
		return nil, err
	}

	if err := daemon.setHostConfig(container, params.HostConfig); err != nil {
		return nil, err
	}
	defer func() {
		if retErr != nil {
			if err := daemon.removeMountPoints(container, true); err != nil {
				logrus.Error(err)
			}
		}
	}()

	if err := daemon.createContainerPlatformSpecificSettings(container, params.Config, params.HostConfig); err != nil {
		return nil, err
	}

	var endpointsConfigs map[string]*networktypes.EndpointSettings
	if params.NetworkingConfig != nil {
		endpointsConfigs = params.NetworkingConfig.EndpointsConfig
	}

	if err := daemon.updateContainerNetworkSettings(container, endpointsConfigs); err != nil {
		return nil, err
	}

	if err := container.ToDiskLocking(); err != nil {
		logrus.Errorf("Error saving new container to disk: %v", err)
		return nil, err
	}
	daemon.LogContainerEvent(container, "create")
	return container, nil
}

func mainDaemon() {
	if utils.ExperimentalBuild() {
		logrus.Warn("Running experimental build")
	}

	if flag.NArg() != 0 {
		flag.Usage()
		return
	}

	logrus.SetFormatter(&logrus.TextFormatter{TimestampFormat: timeutils.RFC3339NanoFixed})

	if err := setDefaultUmask(); err != nil {
		logrus.Fatalf("Failed to set umask: %v", err)
	}

	if len(daemonCfg.LogConfig.Config) > 0 {
		if err := logger.ValidateLogOpts(daemonCfg.LogConfig.Type, daemonCfg.LogConfig.Config); err != nil {
			logrus.Fatalf("Failed to set log opts: %v", err)
		}
	}

	var pfile *pidfile.PidFile
	if daemonCfg.Pidfile != "" {
		pf, err := pidfile.New(daemonCfg.Pidfile)
		if err != nil {
			logrus.Fatalf("Error starting daemon: %v", err)
		}
		pfile = pf
		defer func() {
			if err := pfile.Remove(); err != nil {
				logrus.Error(err)
			}
		}()
	}

	serverConfig := &apiserver.ServerConfig{
		Logging:     true,
		EnableCors:  daemonCfg.EnableCors,
		CorsHeaders: daemonCfg.CorsHeaders,
		Version:     dockerversion.VERSION,
	}
	serverConfig = setPlatformServerConfig(serverConfig, daemonCfg)

	if *flTls {
		if *flTlsVerify {
			tlsOptions.ClientAuth = tls.RequireAndVerifyClientCert
		}
		tlsConfig, err := tlsconfig.Server(tlsOptions)
		if err != nil {
			logrus.Fatal(err)
		}
		serverConfig.TLSConfig = tlsConfig
	}

	api := apiserver.New(serverConfig)

	// The serve API routine never exits unless an error occurs
	// We need to start it as a goroutine and wait on it so
	// daemon doesn't exit
	serveAPIWait := make(chan error)
	go func() {
		if err := api.ServeApi(flHosts); err != nil {
			logrus.Errorf("ServeAPI error: %v", err)
			serveAPIWait <- err
			return
		}
		serveAPIWait <- nil
	}()

	if err := migrateKey(); err != nil {
		logrus.Fatal(err)
	}
	daemonCfg.TrustKeyPath = *flTrustKey

	registryService := registry.NewService(registryCfg)
	d, err := daemon.NewDaemon(daemonCfg, registryService)
	if err != nil {
		if pfile != nil {
			if err := pfile.Remove(); err != nil {
				logrus.Error(err)
			}
		}
		logrus.Fatalf("Error starting daemon: %v", err)
	}

	logrus.Info("Daemon has completed initialization")

	logrus.WithFields(logrus.Fields{
		"version":     dockerversion.VERSION,
		"commit":      dockerversion.GITCOMMIT,
		"execdriver":  d.ExecutionDriver().Name(),
		"graphdriver": d.GraphDriver().String(),
	}).Info("Docker daemon")

	signal.Trap(func() {
		api.Close()
		<-serveAPIWait
		shutdownDaemon(d, 15)
		if pfile != nil {
//.........这里部分代码省略.........

func (cli *DaemonCli) start() {
	// warn from uuid package when running the daemon
	uuid.Loggerf = logrus.Warnf

	flags := flag.CommandLine
	cli.commonFlags.PostParse()

	if cli.commonFlags.TrustKey == "" {
		cli.commonFlags.TrustKey = filepath.Join(getDaemonConfDir(), cliflags.DefaultTrustKeyFile)
	}
	cliConfig, err := loadDaemonCliConfig(cli.Config, flags, cli.commonFlags, *cli.configFile)
	if err != nil {
		fmt.Fprint(os.Stderr, err)
		os.Exit(1)
	}
	cli.Config = cliConfig

	if cli.Config.Debug {
		utils.EnableDebug()
	}

	if utils.ExperimentalBuild() {
		logrus.Warn("Running experimental build")
	}

	logrus.SetFormatter(&logrus.TextFormatter{
		TimestampFormat: jsonlog.RFC3339NanoFixed,
		DisableColors:   cli.Config.RawLogs,
	})

	if err := setDefaultUmask(); err != nil {
		logrus.Fatalf("Failed to set umask: %v", err)
	}

	if len(cli.LogConfig.Config) > 0 {
		if err := logger.ValidateLogOpts(cli.LogConfig.Type, cli.LogConfig.Config); err != nil {
			logrus.Fatalf("Failed to set log opts: %v", err)
		}
	}

	var pfile *pidfile.PIDFile
	if cli.Pidfile != "" {
		pf, err := pidfile.New(cli.Pidfile)
		if err != nil {
			logrus.Fatalf("Error starting daemon: %v", err)
		}
		pfile = pf
		defer func() {
			if err := pfile.Remove(); err != nil {
				logrus.Error(err)
			}
		}()
	}

	serverConfig := &apiserver.Config{
		Logging:     true,
		SocketGroup: cli.Config.SocketGroup,
		Version:     dockerversion.Version,
	}
	serverConfig = setPlatformServerConfig(serverConfig, cli.Config)

	if cli.Config.TLS {
		tlsOptions := tlsconfig.Options{
			CAFile:   cli.Config.CommonTLSOptions.CAFile,
			CertFile: cli.Config.CommonTLSOptions.CertFile,
			KeyFile:  cli.Config.CommonTLSOptions.KeyFile,
		}

		if cli.Config.TLSVerify {
			// server requires and verifies client's certificate
			tlsOptions.ClientAuth = tls.RequireAndVerifyClientCert
		}
		tlsConfig, err := tlsconfig.Server(tlsOptions)
		if err != nil {
			logrus.Fatal(err)
		}
		serverConfig.TLSConfig = tlsConfig
	}

	if len(cli.Config.Hosts) == 0 {
		cli.Config.Hosts = make([]string, 1)
	}

	api := apiserver.New(serverConfig)

	for i := 0; i < len(cli.Config.Hosts); i++ {
		var err error
		if cli.Config.Hosts[i], err = opts.ParseHost(cli.Config.TLS, cli.Config.Hosts[i]); err != nil {
			logrus.Fatalf("error parsing -H %s : %v", cli.Config.Hosts[i], err)
		}

		protoAddr := cli.Config.Hosts[i]
		protoAddrParts := strings.SplitN(protoAddr, "://", 2)
		if len(protoAddrParts) != 2 {
			logrus.Fatalf("bad format %s, expected PROTO://ADDR", protoAddr)
		}

		proto := protoAddrParts[0]
		addr := protoAddrParts[1]

//.........这里部分代码省略.........

// CmdDaemon is the daemon command, called the raw arguments after `docker daemon`.
func (cli *DaemonCli) CmdDaemon(args ...string) error {
	// warn from uuid package when running the daemon
	uuid.Loggerf = logrus.Warnf

	//调整一下daemon的启动方式
	if !commonFlags.FlagSet.IsEmpty() || !clientFlags.FlagSet.IsEmpty() {
		// deny `docker -D daemon`
		illegalFlag := getGlobalFlag()
		fmt.Fprintf(os.Stderr, "invalid flag '-%s'.\nSee 'docker daemon --help'.\n", illegalFlag.Names[0])
		os.Exit(1)
	} else {
		// allow new form `docker daemon -D`
		flag.Merge(cli.flags, commonFlags.FlagSet)
	}

	configFile := cli.flags.String([]string{daemonConfigFileFlag}, defaultDaemonConfigFile, "Daemon configuration file")

	//匹配配置参数
	cli.flags.ParseFlags(args, true)
	//配置参数生效
	commonFlags.PostParse()

	if commonFlags.TrustKey == "" {
		commonFlags.TrustKey = filepath.Join(getDaemonConfDir(), defaultTrustKeyFile)
	}
	cliConfig, err := loadDaemonCliConfig(cli.Config, cli.flags, commonFlags, *configFile)
	if err != nil {
		fmt.Fprint(os.Stderr, err)
		os.Exit(1)
	}
	cli.Config = cliConfig

	if cli.Config.Debug {
		utils.EnableDebug()
	}

	if utils.ExperimentalBuild() {
		logrus.Warn("Running experimental build")
	}

	logrus.SetFormatter(&logrus.TextFormatter{
		TimestampFormat: jsonlog.RFC3339NanoFixed,
		DisableColors:   cli.Config.RawLogs,
	})

	if err := setDefaultUmask(); err != nil {
		logrus.Fatalf("Failed to set umask: %v", err)
	}

	if len(cli.LogConfig.Config) > 0 {
		if err := logger.ValidateLogOpts(cli.LogConfig.Type, cli.LogConfig.Config); err != nil {
			logrus.Fatalf("Failed to set log opts: %v", err)
		}
	}

	var pfile *pidfile.PIDFile
	if cli.Pidfile != "" {
		pf, err := pidfile.New(cli.Pidfile)
		if err != nil {
			logrus.Fatalf("Error starting daemon: %v", err)
		}
		pfile = pf
		defer func() {
			if err := pfile.Remove(); err != nil {
				logrus.Error(err)
			}
		}()
	}

	//定义apiserver的配置，包括认证、日志输出、版本等。
	serverConfig := &apiserver.Config{
		AuthorizationPluginNames: cli.Config.AuthorizationPlugins,
		Logging:                  true,
		SocketGroup:              cli.Config.SocketGroup,
		Version:                  dockerversion.Version,
	}
	serverConfig = setPlatformServerConfig(serverConfig, cli.Config)

	if cli.Config.TLS {
		tlsOptions := tlsconfig.Options{
			CAFile:   cli.Config.CommonTLSOptions.CAFile,
			CertFile: cli.Config.CommonTLSOptions.CertFile,
			KeyFile:  cli.Config.CommonTLSOptions.KeyFile,
		}

		if cli.Config.TLSVerify {
			// server requires and verifies client's certificate
			tlsOptions.ClientAuth = tls.RequireAndVerifyClientCert
		}
		tlsConfig, err := tlsconfig.Server(tlsOptions)
		if err != nil {
			logrus.Fatal(err)
		}
		serverConfig.TLSConfig = tlsConfig
	}

	if len(cli.Config.Hosts) == 0 {
		cli.Config.Hosts = make([]string, 1)
	}
//.........这里部分代码省略.........