// ensure docker info succeeds
func (s *DockerSuite) TestInfoEnsureSucceeds(c *check.C) {
	versionCmd := exec.Command(dockerBinary, "info")
	out, exitCode, err := runCommandWithOutput(versionCmd)
	if err != nil || exitCode != 0 {
		c.Fatalf("failed to execute docker info: %s, %v", out, err)
	}

	// always shown fields
	stringsToCheck := []string{
		"ID:",
		"Containers:",
		"Images:",
		"Execution Driver:",
		"Logging Driver:",
		"Operating System:",
		"CPUs:",
		"Total Memory:",
		"Kernel Version:",
		"Storage Driver:",
	}

	if utils.ExperimentalBuild() {
		stringsToCheck = append(stringsToCheck, "Experimental: true")
	}

	for _, linePrefix := range stringsToCheck {
		if !strings.Contains(out, linePrefix) {
			c.Errorf("couldn't find string %v in output", linePrefix)
		}
	}
}

// ensure docker info succeeds
func (s *DockerSuite) TestInfoEnsureSucceeds(c *check.C) {
	out, _ := dockerCmd(c, "info")

	// always shown fields
	stringsToCheck := []string{
		"ID:",
		"Containers:",
		"Images:",
		"Execution Driver:",
		"Logging Driver:",
		"Operating System:",
		"CPUs:",
		"Total Memory:",
		"Kernel Version:",
		"Storage Driver:",
	}

	if utils.ExperimentalBuild() {
		stringsToCheck = append(stringsToCheck, "Experimental: true")
	}

	for _, linePrefix := range stringsToCheck {
		if !strings.Contains(out, linePrefix) {
			c.Errorf("couldn't find string %v in output", linePrefix)
		}
	}
}

// SystemVersion returns information of the docker client and server host.
func (cli *Client) SystemVersion() (types.VersionResponse, error) {
	client := &types.Version{
		Version:      dockerversion.Version,
		APIVersion:   api.Version,
		GoVersion:    runtime.Version(),
		GitCommit:    dockerversion.GitCommit,
		BuildTime:    dockerversion.BuildTime,
		Os:           runtime.GOOS,
		Arch:         runtime.GOARCH,
		Experimental: utils.ExperimentalBuild(),
	}

	resp, err := cli.get("/version", nil, nil)
	if err != nil {
		return types.VersionResponse{Client: client}, err
	}
	defer ensureReaderClosed(resp)

	var server types.Version
	err = json.NewDecoder(resp.body).Decode(&server)
	if err != nil {
		return types.VersionResponse{Client: client}, err
	}
	return types.VersionResponse{Client: client, Server: &server}, nil
}

// ensure docker info succeeds
func (s *DockerSuite) TestInfoEnsureSucceeds(c *check.C) {
	out, _ := dockerCmd(c, "info")

	// always shown fields
	stringsToCheck := []string{
		"ID:",
		"Containers:",
		" Running:",
		" Paused:",
		" Stopped:",
		"Images:",
		"Execution Driver:",
		"OSType:",
		"Architecture:",
		"Logging Driver:",
		"Operating System:",
		"CPUs:",
		"Total Memory:",
		"Kernel Version:",
		"Storage Driver:",
		"Volume:",
		"Network:",
	}

	if utils.ExperimentalBuild() {
		stringsToCheck = append(stringsToCheck, "Experimental: true")
	}

	for _, linePrefix := range stringsToCheck {
		c.Assert(out, checker.Contains, linePrefix, check.Commentf("couldn't find string %v in output", linePrefix))
	}
}

func showVersion() {
	if utils.ExperimentalBuild() {
		fmt.Printf("Docker version %s, build %s, experimental\n", dockerversion.Version, dockerversion.GitCommit)
	} else {
		fmt.Printf("Docker version %s, build %s\n", dockerversion.Version, dockerversion.GitCommit)
	}
}

// CmdVersion shows Docker version information.
//
// Available version information is shown for: client Docker version, client API version, client Go version, client Git commit, client OS/Arch, server Docker version, server API version, server Go version, server Git commit, and server OS/Arch.
//
// Usage: docker version
func (cli *DockerCli) CmdVersion(args ...string) (err error) {
	cmd := Cli.Subcmd("version", nil, Cli.DockerCommands["version"].Description, true)
	tmplStr := cmd.String([]string{"f", "#format", "-format"}, "", "Format the output using the given go template")
	cmd.Require(flag.Exact, 0)

	cmd.ParseFlags(args, true)

	templateFormat := versionTemplate
	if *tmplStr != "" {
		templateFormat = *tmplStr
	}

	var tmpl *template.Template
	if tmpl, err = template.New("").Funcs(funcMap).Parse(templateFormat); err != nil {
		return Cli.StatusError{StatusCode: 64,
			Status: "Template parsing error: " + err.Error()}
	}

	vd := types.VersionResponse{
		Client: &types.Version{
			Version:      dockerversion.Version,
			APIVersion:   cli.client.ClientVersion(),
			GoVersion:    runtime.Version(),
			GitCommit:    dockerversion.GitCommit,
			BuildTime:    dockerversion.BuildTime,
			Os:           runtime.GOOS,
			Arch:         runtime.GOARCH,
			Experimental: utils.ExperimentalBuild(),
		},
	}

	serverVersion, err := cli.client.ServerVersion()
	if err == nil {
		vd.Server = &serverVersion
	}

	// first we need to make BuildTime more human friendly
	t, errTime := time.Parse(time.RFC3339Nano, vd.Client.BuildTime)
	if errTime == nil {
		vd.Client.BuildTime = t.Format(time.ANSIC)
	}

	if vd.ServerOK() {
		t, errTime = time.Parse(time.RFC3339Nano, vd.Server.BuildTime)
		if errTime == nil {
			vd.Server.BuildTime = t.Format(time.ANSIC)
		}
	}

	if err2 := tmpl.Execute(cli.out, vd); err2 != nil && err == nil {
		err = err2
	}
	cli.out.Write([]byte{'\n'})
	return err
}

// CmdVersion shows Docker version information.
//
// Available version information is shown for: client Docker version, client API version, client Go version, client Git commit, client OS/Arch, server Docker version, server API version, server Go version, server Git commit, and server OS/Arch.
//
// Usage: docker version
func (cli *DockerCli) CmdVersion(args ...string) error {
	cmd := cli.Subcmd("version", nil, "Show the Docker version information.", true)
	cmd.Require(flag.Exact, 0)

	cmd.ParseFlags(args, true)

	fmt.Println("Client:")
	if dockerversion.VERSION != "" {
		fmt.Fprintf(cli.out, " Version:      %s\n", dockerversion.VERSION)
	}
	fmt.Fprintf(cli.out, " API version:  %s\n", api.Version)
	fmt.Fprintf(cli.out, " Go version:   %s\n", runtime.Version())
	if dockerversion.GITCOMMIT != "" {
		fmt.Fprintf(cli.out, " Git commit:   %s\n", dockerversion.GITCOMMIT)
	}
	if dockerversion.BUILDTIME != "" {
		fmt.Fprintf(cli.out, " Built:        %s\n", dockerversion.BUILDTIME)
	}
	fmt.Fprintf(cli.out, " OS/Arch:      %s/%s\n", runtime.GOOS, runtime.GOARCH)
	if utils.ExperimentalBuild() {
		fmt.Fprintf(cli.out, " Experimental: true\n")
	}

	stream, _, _, err := cli.call("GET", "/version", nil, nil)
	if err != nil {
		return err
	}

	defer stream.Close()

	var v types.Version
	if err := json.NewDecoder(stream).Decode(&v); err != nil {
		fmt.Fprintf(cli.err, "Error reading remote version: %s\n", err)
		return err
	}

	fmt.Println("\nServer:")
	fmt.Fprintf(cli.out, " Version:      %s\n", v.Version)
	if v.ApiVersion != "" {
		fmt.Fprintf(cli.out, " API version:  %s\n", v.ApiVersion)
	}
	fmt.Fprintf(cli.out, " Go version:   %s\n", v.GoVersion)
	fmt.Fprintf(cli.out, " Git commit:   %s\n", v.GitCommit)
	if len(v.BuildTime) > 0 {
		fmt.Fprintf(cli.out, " Built:        %s\n", v.BuildTime)
	}
	fmt.Fprintf(cli.out, " OS/Arch:      %s/%s\n", v.Os, v.Arch)
	if v.Experimental {
		fmt.Fprintf(cli.out, " Experimental: true\n")
	}
	fmt.Fprintf(cli.out, "\n")
	return nil
}

// CmdVersion shows Docker version information.
//
// Available version information is shown for: client Docker version, client API version, client Go version, client Git commit, client OS/Arch, server Docker version, server API version, server Go version, server Git commit, and server OS/Arch.
//
// Usage: docker version
func (cli *DockerCli) CmdVersion(args ...string) (err error) {
	cmd := Cli.Subcmd("version", nil, Cli.DockerCommands["version"].Description, true)
	tmplStr := cmd.String([]string{"f", "#format", "-format"}, "", "Format the output using the given go template")
	cmd.Require(flag.Exact, 0)

	cmd.ParseFlags(args, true)
	if *tmplStr == "" {
		*tmplStr = versionTemplate
	}

	var tmpl *template.Template
	if tmpl, err = template.New("").Funcs(funcMap).Parse(*tmplStr); err != nil {
		return Cli.StatusError{StatusCode: 64,
			Status: "Template parsing error: " + err.Error()}
	}

	vd := versionData{
		Client: types.Version{
			Version:      dockerversion.VERSION,
			APIVersion:   api.Version,
			GoVersion:    runtime.Version(),
			GitCommit:    dockerversion.GITCOMMIT,
			BuildTime:    dockerversion.BUILDTIME,
			Os:           runtime.GOOS,
			Arch:         runtime.GOARCH,
			Experimental: utils.ExperimentalBuild(),
		},
	}

	defer func() {
		if err2 := tmpl.Execute(cli.out, vd); err2 != nil && err == nil {
			err = err2
		}
		cli.out.Write([]byte{'\n'})
	}()

	serverResp, err := cli.call("GET", "/version", nil, nil)
	if err != nil {
		return err
	}

	defer serverResp.body.Close()

	if err = json.NewDecoder(serverResp.body).Decode(&vd.Server); err != nil {
		return Cli.StatusError{StatusCode: 1,
			Status: "Error reading remote version: " + err.Error()}
	}

	vd.ServerOK = true

	return
}

func runVersion(dockerCli *client.DockerCli, opts *versionOptions) error {
	ctx := context.Background()

	templateFormat := versionTemplate
	if opts.format != "" {
		templateFormat = opts.format
	}

	tmpl, err := templates.Parse(templateFormat)
	if err != nil {
		return cli.StatusError{StatusCode: 64,
			Status: "Template parsing error: " + err.Error()}
	}

	vd := types.VersionResponse{
		Client: &types.Version{
			Version:      dockerversion.Version,
			APIVersion:   dockerCli.Client().ClientVersion(),
			GoVersion:    runtime.Version(),
			GitCommit:    dockerversion.GitCommit,
			BuildTime:    dockerversion.BuildTime,
			Os:           runtime.GOOS,
			Arch:         runtime.GOARCH,
			Experimental: utils.ExperimentalBuild(),
		},
	}

	serverVersion, err := dockerCli.Client().ServerVersion(ctx)
	if err == nil {
		vd.Server = &serverVersion
	}

	// first we need to make BuildTime more human friendly
	t, errTime := time.Parse(time.RFC3339Nano, vd.Client.BuildTime)
	if errTime == nil {
		vd.Client.BuildTime = t.Format(time.ANSIC)
	}

	if vd.ServerOK() {
		t, errTime = time.Parse(time.RFC3339Nano, vd.Server.BuildTime)
		if errTime == nil {
			vd.Server.BuildTime = t.Format(time.ANSIC)
		}
	}

	if err2 := tmpl.Execute(dockerCli.Out(), vd); err2 != nil && err == nil {
		err = err2
	}
	dockerCli.Out().Write([]byte{'\n'})
	return err
}

// SystemVersion returns version information about the daemon.
func (daemon *Daemon) SystemVersion() types.Version {
	v := types.Version{
		Version:      dockerversion.Version,
		GitCommit:    dockerversion.GitCommit,
		GoVersion:    runtime.Version(),
		Os:           runtime.GOOS,
		Arch:         runtime.GOARCH,
		BuildTime:    dockerversion.BuildTime,
		Experimental: utils.ExperimentalBuild(),
	}

	if kernelVersion, err := kernel.GetKernelVersion(); err == nil {
		v.KernelVersion = kernelVersion.String()
	}

	return v
}

// CmdVersion shows Docker version information.
//
// Available version information is shown for: client Docker version, client API version, client Go version, client Git commit, client OS/Arch, server Docker version, server API version, server Go version, server Git commit, and server OS/Arch.
//
// Usage: docker version
func (cli *DockerCli) CmdVersion(args ...string) error {
	cmd := cli.Subcmd("version", nil, "Show the Docker version information.", true)
	cmd.Require(flag.Exact, 0)

	cmd.ParseFlags(args, true)

	if dockerversion.VERSION != "" {
		fmt.Fprintf(cli.out, "Client version: %s\n", dockerversion.VERSION)
	}
	fmt.Fprintf(cli.out, "Client API version: %s\n", api.Version)
	fmt.Fprintf(cli.out, "Go version (client): %s\n", runtime.Version())
	if dockerversion.GITCOMMIT != "" {
		fmt.Fprintf(cli.out, "Git commit (client): %s\n", dockerversion.GITCOMMIT)
	}
	fmt.Fprintf(cli.out, "OS/Arch (client): %s/%s\n", runtime.GOOS, runtime.GOARCH)
	if utils.ExperimentalBuild() {
		fmt.Fprintf(cli.out, "Experimental (client): true\n")
	}

	stream, _, _, err := cli.call("GET", "/version", nil, nil)
	if err != nil {
		return err
	}

	var v types.Version
	if err := json.NewDecoder(stream).Decode(&v); err != nil {
		fmt.Fprintf(cli.err, "Error reading remote version: %s\n", err)
		return err
	}

	fmt.Fprintf(cli.out, "Server version: %s\n", v.Version)
	if v.ApiVersion != "" {
		fmt.Fprintf(cli.out, "Server API version: %s\n", v.ApiVersion)
	}
	fmt.Fprintf(cli.out, "Go version (server): %s\n", v.GoVersion)
	fmt.Fprintf(cli.out, "Git commit (server): %s\n", v.GitCommit)
	fmt.Fprintf(cli.out, "OS/Arch (server): %s/%s\n", v.Os, v.Arch)
	if v.Experimental {
		fmt.Fprintf(cli.out, "Experimental (server): true\n")
	}
	return nil
}

func (s *Server) getVersion(version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	v := &types.Version{
		Version:    dockerversion.VERSION,
		ApiVersion: api.Version,
		GitCommit:  dockerversion.GITCOMMIT,
		GoVersion:  runtime.Version(),
		Os:         runtime.GOOS,
		Arch:       runtime.GOARCH,
	}

	if version.GreaterThanOrEqualTo("1.19") {
		v.Experimental = utils.ExperimentalBuild()
	}

	if kernelVersion, err := kernel.GetKernelVersion(); err == nil {
		v.KernelVersion = kernelVersion.String()
	}

	return writeJSON(w, http.StatusOK, v)
}

// SystemVersion returns version information about the daemon.
func (daemon *Daemon) SystemVersion() types.Version {
	v := types.Version{
		Version:      dockerversion.Version,
		GitCommit:    dockerversion.GitCommit,
		GoVersion:    runtime.Version(),
		Os:           runtime.GOOS,
		Arch:         runtime.GOARCH,
		BuildTime:    dockerversion.BuildTime,
		Experimental: utils.ExperimentalBuild(),
	}

	kernelVersion := "<unknown>"
	if kv, err := kernel.GetKernelVersion(); err != nil {
		logrus.Warnf("Could not get kernel version: %v", err)
	} else {
		kernelVersion = kv.String()
	}
	v.KernelVersion = kernelVersion

	return v
}

func (s *router) getVersion(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	v := &types.Version{
		Version:    dockerversion.VERSION,
		APIVersion: api.Version,
		GitCommit:  dockerversion.GITCOMMIT,
		GoVersion:  runtime.Version(),
		Os:         runtime.GOOS,
		Arch:       runtime.GOARCH,
		BuildTime:  dockerversion.BUILDTIME,
	}

	version := httputils.VersionFromContext(ctx)

	if version.GreaterThanOrEqualTo("1.19") {
		v.Experimental = utils.ExperimentalBuild()
	}

	if kernelVersion, err := kernel.GetKernelVersion(); err == nil {
		v.KernelVersion = kernelVersion.String()
	}

	return httputils.WriteJSON(w, http.StatusOK, v)
}

//.........这里部分代码省略.........

	for _, home := range homes {

		// Dup baseEnvs and add our new HOME value
		newEnvs := make([]string, len(baseEnvs)+1)
		copy(newEnvs, baseEnvs)
		newEnvs[len(newEnvs)-1] = homeKey + "=" + home

		scanForHome := runtime.GOOS != "windows" && home != "/"

		// Check main help text to make sure its not over 80 chars
		helpCmd := exec.Command(dockerBinary, "help")
		helpCmd.Env = newEnvs
		out, _, err := runCommandWithOutput(helpCmd)
		c.Assert(err, checker.IsNil, check.Commentf(out))
		lines := strings.Split(out, "\n")
		for _, line := range lines {
			// All lines should not end with a space
			c.Assert(line, checker.Not(checker.HasSuffix), " ", check.Commentf("Line should not end with a space"))

			if scanForHome && strings.Contains(line, `=`+home) {
				c.Fatalf("Line should use '%q' instead of %q:\n%s", homedir.GetShortcutString(), home, line)
			}
			if runtime.GOOS != "windows" {
				i := strings.Index(line, homedir.GetShortcutString())
				if i >= 0 && i != len(line)-1 && line[i+1] != '/' {
					c.Fatalf("Main help should not have used home shortcut:\n%s", line)
				}
			}
		}

		// Make sure each cmd's help text fits within 90 chars and that
		// on non-windows system we use ~ when possible (to shorten things).
		// Pull the list of commands from the "Commands:" section of docker help
		helpCmd = exec.Command(dockerBinary, "help")
		helpCmd.Env = newEnvs
		out, _, err = runCommandWithOutput(helpCmd)
		c.Assert(err, checker.IsNil, check.Commentf(out))
		i := strings.Index(out, "Commands:")
		c.Assert(i, checker.GreaterOrEqualThan, 0, check.Commentf("Missing 'Commands:' in:\n%s", out))

		cmds := []string{}
		// Grab all chars starting at "Commands:"
		helpOut := strings.Split(out[i:], "\n")
		// Skip first line, it is just "Commands:"
		helpOut = helpOut[1:]

		// Create the list of commands we want to test
		cmdsToTest := []string{}
		for _, cmd := range helpOut {
			// Stop on blank line or non-idented line
			if cmd == "" || !unicode.IsSpace(rune(cmd[0])) {
				break
			}

			// Grab just the first word of each line
			cmd = strings.Split(strings.TrimSpace(cmd), " ")[0]
			cmds = append(cmds, cmd) // Saving count for later

			cmdsToTest = append(cmdsToTest, cmd)
		}

		// Add some 'two word' commands - would be nice to automatically
		// calculate this list - somehow
		cmdsToTest = append(cmdsToTest, "volume create")
		cmdsToTest = append(cmdsToTest, "volume inspect")
		cmdsToTest = append(cmdsToTest, "volume ls")
		cmdsToTest = append(cmdsToTest, "volume rm")
		cmdsToTest = append(cmdsToTest, "network connect")
		cmdsToTest = append(cmdsToTest, "network create")
		cmdsToTest = append(cmdsToTest, "network disconnect")
		cmdsToTest = append(cmdsToTest, "network inspect")
		cmdsToTest = append(cmdsToTest, "network ls")
		cmdsToTest = append(cmdsToTest, "network rm")

		if utils.ExperimentalBuild() {
			cmdsToTest = append(cmdsToTest, "checkpoint create")
			cmdsToTest = append(cmdsToTest, "checkpoint ls")
			cmdsToTest = append(cmdsToTest, "checkpoint rm")
		}

		// Divide the list of commands into go routines and  run the func testcommand on the commands in parallel
		// to save runtime of test

		errChan := make(chan error)

		for index := 0; index < len(cmdsToTest); index++ {
			go func(index int) {
				errChan <- testCommand(cmdsToTest[index], newEnvs, scanForHome, home)
			}(index)
		}

		for index := 0; index < len(cmdsToTest); index++ {
			err := <-errChan
			if err != nil {
				c.Fatal(err)
			}
		}
	}
}

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)
	}

	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 {
			if err := pfile.Remove(); err != nil {
				logrus.Error(err)
			}
		}
	})

//.........这里部分代码省略.........

// SystemInfo returns information about the host server the daemon is running on.
func (daemon *Daemon) SystemInfo() (*types.Info, error) {
	kernelVersion := "<unknown>"
	if kv, err := kernel.GetKernelVersion(); err == nil {
		kernelVersion = kv.String()
	}

	operatingSystem := "<unknown>"
	if s, err := operatingsystem.GetOperatingSystem(); err == nil {
		operatingSystem = s
	}

	// Don't do containerized check on Windows
	if runtime.GOOS != "windows" {
		if inContainer, err := operatingsystem.IsContainerized(); err != nil {
			logrus.Errorf("Could not determine if daemon is containerized: %v", err)
			operatingSystem += " (error determining if containerized)"
		} else if inContainer {
			operatingSystem += " (containerized)"
		}
	}

	meminfo, err := system.ReadMemInfo()
	if err != nil {
		logrus.Errorf("Could not read system memory info: %v", err)
	}

	// if we still have the original dockerinit binary from before
	// we copied it locally, let's return the path to that, since
	// that's more intuitive (the copied path is trivial to derive
	// by hand given VERSION)
	initPath := utils.DockerInitPath("")
	if initPath == "" {
		// if that fails, we'll just return the path from the daemon
		initPath = daemon.systemInitPath()
	}

	sysInfo := sysinfo.New(true)

	v := &types.Info{
		ID:                 daemon.ID,
		Containers:         len(daemon.List()),
		Images:             len(daemon.imageStore.Map()),
		Driver:             daemon.GraphDriver().String(),
		DriverStatus:       daemon.GraphDriver().Status(),
		Plugins:            daemon.showPluginsInfo(),
		IPv4Forwarding:     !sysInfo.IPv4ForwardingDisabled,
		BridgeNfIptables:   !sysInfo.BridgeNfCallIptablesDisabled,
		BridgeNfIP6tables:  !sysInfo.BridgeNfCallIP6tablesDisabled,
		Debug:              os.Getenv("DEBUG") != "",
		NFd:                fileutils.GetTotalUsedFds(),
		NGoroutines:        runtime.NumGoroutine(),
		SystemTime:         time.Now().Format(time.RFC3339Nano),
		ExecutionDriver:    daemon.ExecutionDriver().Name(),
		LoggingDriver:      daemon.defaultLogConfig.Type,
		NEventsListener:    daemon.EventsService.SubscribersCount(),
		KernelVersion:      kernelVersion,
		OperatingSystem:    operatingSystem,
		IndexServerAddress: registry.IndexServer,
		OSType:             platform.OSType,
		Architecture:       platform.Architecture,
		RegistryConfig:     daemon.RegistryService.Config,
		InitSha1:           dockerversion.InitSHA1,
		InitPath:           initPath,
		NCPU:               runtime.NumCPU(),
		MemTotal:           meminfo.MemTotal,
		DockerRootDir:      daemon.config().Root,
		Labels:             daemon.config().Labels,
		ExperimentalBuild:  utils.ExperimentalBuild(),
		ServerVersion:      dockerversion.Version,
		ClusterStore:       daemon.config().ClusterStore,
		ClusterAdvertise:   daemon.config().ClusterAdvertise,
		HTTPProxy:          getProxyEnv("http_proxy"),
		HTTPSProxy:         getProxyEnv("https_proxy"),
		NoProxy:            getProxyEnv("no_proxy"),
	}

	// TODO Windows. Refactor this more once sysinfo is refactored into
	// platform specific code. On Windows, sysinfo.cgroupMemInfo and
	// sysinfo.cgroupCpuInfo will be nil otherwise and cause a SIGSEGV if
	// an attempt is made to access through them.
	if runtime.GOOS != "windows" {
		v.MemoryLimit = sysInfo.MemoryLimit
		v.SwapLimit = sysInfo.SwapLimit
		v.OomKillDisable = sysInfo.OomKillDisable
		v.CPUCfsPeriod = sysInfo.CPUCfsPeriod
		v.CPUCfsQuota = sysInfo.CPUCfsQuota
		v.CPUShares = sysInfo.CPUShares
		v.CPUSet = sysInfo.Cpuset
	}

	if hostname, err := os.Hostname(); err == nil {
		v.Name = hostname
	}

	return v, nil
}

// SystemInfo returns information about the host server the daemon is running on.
func (daemon *Daemon) SystemInfo() (*types.Info, error) {
	kernelVersion := "<unknown>"
	if kv, err := kernel.GetKernelVersion(); err != nil {
		logrus.Warnf("Could not get kernel version: %v", err)
	} else {
		kernelVersion = kv.String()
	}

	operatingSystem := "<unknown>"
	if s, err := operatingsystem.GetOperatingSystem(); err != nil {
		logrus.Warnf("Could not get operating system name: %v", err)
	} else {
		operatingSystem = s
	}

	// Don't do containerized check on Windows
	if runtime.GOOS != "windows" {
		if inContainer, err := operatingsystem.IsContainerized(); err != nil {
			logrus.Errorf("Could not determine if daemon is containerized: %v", err)
			operatingSystem += " (error determining if containerized)"
		} else if inContainer {
			operatingSystem += " (containerized)"
		}
	}

	meminfo, err := system.ReadMemInfo()
	if err != nil {
		logrus.Errorf("Could not read system memory info: %v", err)
	}

	sysInfo := sysinfo.New(true)

	var cRunning, cPaused, cStopped int32
	daemon.containers.ApplyAll(func(c *container.Container) {
		switch c.StateString() {
		case "paused":
			atomic.AddInt32(&cPaused, 1)
		case "running":
			atomic.AddInt32(&cRunning, 1)
		default:
			atomic.AddInt32(&cStopped, 1)
		}
	})

	var securityOptions []string
	if sysInfo.AppArmor {
		securityOptions = append(securityOptions, "apparmor")
	}
	if sysInfo.Seccomp {
		securityOptions = append(securityOptions, "seccomp")
	}
	if selinuxEnabled() {
		securityOptions = append(securityOptions, "selinux")
	}

	v := &types.Info{
		ID:                 daemon.ID,
		Containers:         int(cRunning + cPaused + cStopped),
		ContainersRunning:  int(cRunning),
		ContainersPaused:   int(cPaused),
		ContainersStopped:  int(cStopped),
		Images:             len(daemon.imageStore.Map()),
		Driver:             daemon.GraphDriverName(),
		DriverStatus:       daemon.layerStore.DriverStatus(),
		Plugins:            daemon.showPluginsInfo(),
		IPv4Forwarding:     !sysInfo.IPv4ForwardingDisabled,
		BridgeNfIptables:   !sysInfo.BridgeNFCallIPTablesDisabled,
		BridgeNfIP6tables:  !sysInfo.BridgeNFCallIP6TablesDisabled,
		Debug:              utils.IsDebugEnabled(),
		NFd:                fileutils.GetTotalUsedFds(),
		NGoroutines:        runtime.NumGoroutine(),
		SystemTime:         time.Now().Format(time.RFC3339Nano),
		LoggingDriver:      daemon.defaultLogConfig.Type,
		CgroupDriver:       daemon.getCgroupDriver(),
		NEventsListener:    daemon.EventsService.SubscribersCount(),
		KernelVersion:      kernelVersion,
		OperatingSystem:    operatingSystem,
		IndexServerAddress: registry.IndexServer,
		OSType:             platform.OSType,
		Architecture:       platform.Architecture,
		RegistryConfig:     daemon.RegistryService.ServiceConfig(),
		NCPU:               sysinfo.NumCPU(),
		MemTotal:           meminfo.MemTotal,
		DockerRootDir:      daemon.configStore.Root,
		Labels:             daemon.configStore.Labels,
		ExperimentalBuild:  utils.ExperimentalBuild(),
		ServerVersion:      dockerversion.Version,
		ClusterStore:       daemon.configStore.ClusterStore,
		ClusterAdvertise:   daemon.configStore.ClusterAdvertise,
		HTTPProxy:          sockets.GetProxyEnv("http_proxy"),
		HTTPSProxy:         sockets.GetProxyEnv("https_proxy"),
		NoProxy:            sockets.GetProxyEnv("no_proxy"),
		SecurityOptions:    securityOptions,
	}

	// TODO Windows. Refactor this more once sysinfo is refactored into
	// platform specific code. On Windows, sysinfo.cgroupMemInfo and
	// sysinfo.cgroupCpuInfo will be nil otherwise and cause a SIGSEGV if
	// an attempt is made to access through them.
//.........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.........

func (cli *Docker) SendCmdInfo(args ...string) (*types.Info, error) {
	daemon := cli.daemon
	images := daemon.Graph().Map()
	var imgcount int
	if images == nil {
		imgcount = 0
	} else {
		imgcount = len(images)
	}
	kernelVersion := "<unknown>"
	if kv, err := kernel.GetKernelVersion(); err == nil {
		kernelVersion = kv.String()
	}

	operatingSystem := "<unknown>"
	if s, err := operatingsystem.GetOperatingSystem(); err == nil {
		operatingSystem = s
	}

	// Don't do containerized check on Windows
	if runtime.GOOS != "windows" {
		if inContainer, err := operatingsystem.IsContainerized(); err != nil {
			glog.Errorf("Could not determine if daemon is containerized: %v", err)
			operatingSystem += " (error determining if containerized)"
		} else if inContainer {
			operatingSystem += " (containerized)"
		}
	}

	meminfo, err := system.ReadMemInfo()
	if err != nil {
		glog.Errorf("Could not read system memory info: %v", err)
	}

	// if we still have the original dockerinit binary from before we copied it locally, let's return the path to that, since that's more intuitive (the copied path is trivial to derive by hand given VERSION)
	initPath := utils.DockerInitPath("")
	if initPath == "" {
		// if that fails, we'll just return the path from the daemon
		initPath = daemon.SystemInitPath()
	}

	v := &types.Info{
		ID:                 daemon.ID,
		Containers:         len(daemon.List()),
		Images:             imgcount,
		Driver:             daemon.GraphDriver().String(),
		DriverStatus:       daemon.GraphDriver().Status(),
		MemoryLimit:        daemon.SystemConfig().MemoryLimit,
		SwapLimit:          daemon.SystemConfig().SwapLimit,
		CPUCfsPeriod:       daemon.SystemConfig().CPUCfsPeriod,
		CPUCfsQuota:        daemon.SystemConfig().CPUCfsQuota,
		IPv4Forwarding:     !daemon.SystemConfig().IPv4ForwardingDisabled,
		Debug:              os.Getenv("DEBUG") != "",
		NFd:                fileutils.GetTotalUsedFds(),
		OomKillDisable:     daemon.SystemConfig().OomKillDisable,
		NGoroutines:        runtime.NumGoroutine(),
		SystemTime:         time.Now().Format(time.RFC3339Nano),
		NEventsListener:    daemon.EventsService.SubscribersCount(),
		KernelVersion:      kernelVersion,
		OperatingSystem:    operatingSystem,
		IndexServerAddress: registry.IndexServer,
		RegistryConfig:     daemon.RegistryService.Config,
		InitSha1:           dockerversion.InitSHA1,
		InitPath:           initPath,
		NCPU:               runtime.NumCPU(),
		MemTotal:           meminfo.MemTotal,
		DockerRootDir:      daemon.Config().Root,
		Labels:             daemon.Config().Labels,
		ExperimentalBuild:  utils.ExperimentalBuild(),
		ServerVersion:      dockerversion.Version,
		ClusterStore:       daemon.Config().ClusterStore,
		ClusterAdvertise:   daemon.Config().ClusterAdvertise,
		HTTPProxy:          getProxyEnv("http_proxy"),
		HTTPSProxy:         getProxyEnv("https_proxy"),
		NoProxy:            getProxyEnv("no_proxy"),
	}
	if hostname, err := os.Hostname(); err == nil {
		v.Name = hostname
	}

	return v, nil
}