func init() {
	out, err := exec.Command(dockerBinary, "images").CombinedOutput()
	if err != nil {
		panic(err)
	}
	lines := strings.Split(string(out), "\n")[1:]
	for _, l := range lines {
		if l == "" {
			continue
		}
		fields := strings.Fields(l)
		imgTag := fields[0] + ":" + fields[1]
		// just for case if we have dangling images in tested daemon
		if imgTag != "<none>:<none>" {
			protectedImages[imgTag] = struct{}{}
		}
	}

	// Obtain the daemon platform so that it can be used by tests to make
	// intelligent decisions about how to configure themselves, and validate
	// that the target platform is valid.
	res, _, err := sockRequestRaw("GET", "/version", nil, "application/json")
	if err != nil || res == nil || (res != nil && res.StatusCode != http.StatusOK) {
		panic(fmt.Errorf("Init failed to get version: %v. Res=%v", err.Error(), res))
	}
	svrHeader, _ := httputils.ParseServerHeader(res.Header.Get("Server"))
	daemonPlatform = svrHeader.OS
	if daemonPlatform != "linux" && daemonPlatform != "windows" {
		panic("Cannot run tests against platform: " + daemonPlatform)
	}
}

// ImageBuild sends request to the daemon to build images.
// The Body in the response implement an io.ReadCloser and it's up to the caller to
// close it.
func (cli *Client) ImageBuild(options types.ImageBuildOptions) (types.ImageBuildResponse, error) {
	query, err := imageBuildOptionsToQuery(options)
	if err != nil {
		return types.ImageBuildResponse{}, err
	}

	headers := http.Header(make(map[string][]string))
	buf, err := json.Marshal(options.AuthConfigs)
	if err != nil {
		return types.ImageBuildResponse{}, err
	}
	headers.Add("X-Registry-Config", base64.URLEncoding.EncodeToString(buf))
	headers.Set("Content-Type", "application/tar")

	serverResp, err := cli.postRaw("/build", query, options.Context, headers)
	if err != nil {
		return types.ImageBuildResponse{}, err
	}

	var osType string
	if h, err := httputils.ParseServerHeader(serverResp.header.Get("Server")); err == nil {
		osType = h.OS
	}

	return types.ImageBuildResponse{
		Body:   serverResp.body,
		OSType: osType,
	}, nil
}

func init() {
	out, err := exec.Command(dockerBinary, "images").CombinedOutput()
	if err != nil {
		panic(err)
	}
	lines := strings.Split(string(out), "\n")[1:]
	for _, l := range lines {
		if l == "" {
			continue
		}
		fields := strings.Fields(l)
		imgTag := fields[0] + ":" + fields[1]
		// just for case if we have dangling images in tested daemon
		if imgTag != "<none>:<none>" {
			protectedImages[imgTag] = struct{}{}
		}
	}

	// Obtain the daemon platform so that it can be used by tests to make
	// intelligent decisions about how to configure themselves, and validate
	// that the target platform is valid.
	res, _, err := sockRequestRaw("GET", "/version", nil, "application/json")
	if err != nil || res == nil || (res != nil && res.StatusCode != http.StatusOK) {
		panic(fmt.Errorf("Init failed to get version: %v. Res=%v", err.Error(), res))
	}
	svrHeader, _ := httputils.ParseServerHeader(res.Header.Get("Server"))
	daemonPlatform = svrHeader.OS
	if daemonPlatform != "linux" && daemonPlatform != "windows" {
		panic("Cannot run tests against platform: " + daemonPlatform)
	}

	// On Windows, extract out the version as we need to make selective
	// decisions during integration testing as and when features are implemented.
	if daemonPlatform == "windows" {
		if body, err := ioutil.ReadAll(res.Body); err == nil {
			var server types.Version
			if err := json.Unmarshal(body, &server); err == nil {
				// eg in "10.0 10550 (10550.1000.amd64fre.branch.date-time)" we want 10550
				windowsDaemonKV, _ = strconv.Atoi(strings.Split(server.KernelVersion, " ")[1])
			}
		}
	}

	// Now we know the daemon platform, can set paths used by tests.
	_, body, err := sockRequest("GET", "/info", nil)
	if err != nil {
		panic(err)
	}

	var info types.Info
	err = json.Unmarshal(body, &info)
	dockerBasePath = info.DockerRootDir
	volumesConfigPath = filepath.Join(dockerBasePath, "volumes")
	containerStoragePath = filepath.Join(dockerBasePath, "containers")
}

func init() {
	cmd := exec.Command(dockerBinary, "images", "-f", "dangling=false", "--format", "{{.Repository}}:{{.Tag}}")
	cmd.Env = appendBaseEnv(true)
	out, err := cmd.CombinedOutput()
	if err != nil {
		panic(fmt.Errorf("err=%v\nout=%s\n", err, out))
	}
	images := strings.Split(strings.TrimSpace(string(out)), "\n")
	for _, img := range images {
		protectedImages[img] = struct{}{}
	}

	res, body, err := sockRequestRaw("GET", "/info", nil, "application/json")
	if err != nil {
		panic(fmt.Errorf("Init failed to get /info: %v", err))
	}
	defer body.Close()
	if res.StatusCode != http.StatusOK {
		panic(fmt.Errorf("Init failed to get /info. Res=%v", res))
	}

	svrHeader, _ := httputils.ParseServerHeader(res.Header.Get("Server"))
	daemonPlatform = svrHeader.OS
	if daemonPlatform != "linux" && daemonPlatform != "windows" {
		panic("Cannot run tests against platform: " + daemonPlatform)
	}

	// Now we know the daemon platform, can set paths used by tests.
	var info types.Info
	err = json.NewDecoder(body).Decode(&info)
	if err != nil {
		panic(fmt.Errorf("Init failed to unmarshal docker info: %v", err))
	}

	daemonStorageDriver = info.Driver
	dockerBasePath = info.DockerRootDir
	volumesConfigPath = filepath.Join(dockerBasePath, "volumes")
	containerStoragePath = filepath.Join(dockerBasePath, "containers")
	// Make sure in context of daemon, not the local platform. Note we can't
	// use filepath.FromSlash or ToSlash here as they are a no-op on Unix.
	if daemonPlatform == "windows" {
		volumesConfigPath = strings.Replace(volumesConfigPath, `/`, `\`, -1)
		containerStoragePath = strings.Replace(containerStoragePath, `/`, `\`, -1)
		// On Windows, extract out the version as we need to make selective
		// decisions during integration testing as and when features are implemented.
		// eg in "10.0 10550 (10550.1000.amd64fre.branch.date-time)" we want 10550
		windowsDaemonKV, _ = strconv.Atoi(strings.Split(info.KernelVersion, " ")[1])
	} else {
		volumesConfigPath = strings.Replace(volumesConfigPath, `\`, `/`, -1)
		containerStoragePath = strings.Replace(containerStoragePath, `\`, `/`, -1)
	}
	isolation = info.Isolation
}

//.........这里部分代码省略.........
		"t": flTags.GetAll(),
	}
	if *suppressOutput {
		v.Set("q", "1")
	}
	if isRemote {
		v.Set("remote", cmd.Arg(0))
	}
	if *noCache {
		v.Set("nocache", "1")
	}
	if *rm {
		v.Set("rm", "1")
	} else {
		v.Set("rm", "0")
	}

	if *forceRm {
		v.Set("forcerm", "1")
	}

	if *pull {
		v.Set("pull", "1")
	}

	v.Set("cpusetcpus", *flCPUSetCpus)
	v.Set("cpusetmems", *flCPUSetMems)
	v.Set("cpushares", strconv.FormatInt(*flCPUShares, 10))
	v.Set("cpuquota", strconv.FormatInt(*flCPUQuota, 10))
	v.Set("cpuperiod", strconv.FormatInt(*flCPUPeriod, 10))
	v.Set("memory", strconv.FormatInt(memory, 10))
	v.Set("memswap", strconv.FormatInt(memorySwap, 10))
	v.Set("cgroupparent", *flCgroupParent)

	v.Set("dockerfile", relDockerfile)

	ulimitsVar := flUlimits.GetList()
	ulimitsJSON, err := json.Marshal(ulimitsVar)
	if err != nil {
		return err
	}
	v.Set("ulimits", string(ulimitsJSON))

	// collect all the build-time environment variables for the container
	buildArgs := runconfig.ConvertKVStringsToMap(flBuildArg.GetAll())
	buildArgsJSON, err := json.Marshal(buildArgs)
	if err != nil {
		return err
	}
	v.Set("buildargs", string(buildArgsJSON))

	headers := http.Header(make(map[string][]string))
	buf, err := json.Marshal(cli.configFile.AuthConfigs)
	if err != nil {
		return err
	}
	headers.Add("X-Registry-Config", base64.URLEncoding.EncodeToString(buf))
	headers.Set("Content-Type", "application/tar")

	sopts := &streamOpts{
		rawTerminal: true,
		in:          body,
		out:         cli.out,
		headers:     headers,
	}

	serverResp, err := cli.stream("POST", fmt.Sprintf("/build?%s", v.Encode()), sopts)

	// Windows: show error message about modified file permissions.
	if runtime.GOOS == "windows" {
		h, err := httputils.ParseServerHeader(serverResp.header.Get("Server"))
		if err == nil {
			if h.OS != "windows" {
				fmt.Fprintln(cli.err, `SECURITY WARNING: You are building a Docker image from Windows against a non-Windows Docker host. All files and directories added to build context will have '-rwxr-xr-x' permissions. It is recommended to double check and reset permissions for sensitive files and directories.`)
			}
		}
	}

	if jerr, ok := err.(*jsonmessage.JSONError); ok {
		// If no error code is set, default to 1
		if jerr.Code == 0 {
			jerr.Code = 1
		}
		return Cli.StatusError{Status: jerr.Message, StatusCode: jerr.Code}
	}

	if err != nil {
		return err
	}

	// Since the build was successful, now we must tag any of the resolved
	// images from the above Dockerfile rewrite.
	for _, resolved := range resolvedTags {
		if err := cli.tagTrusted(resolved.repoInfo, resolved.digestRef, resolved.tagRef); err != nil {
			return err
		}
	}

	return nil
}

// CmdInfo displays system-wide information.
//
// Usage: docker info
func (cli *DockerCli) CmdInfo(args ...string) error {
	cmd := cli.Subcmd("info", nil, "Display system-wide information", true)
	cmd.Require(flag.Exact, 0)

	cmd.ParseFlags(args, true)

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

	defer serverResp.body.Close()

	info := &types.Info{}
	if err := json.NewDecoder(serverResp.body).Decode(info); err != nil {
		return fmt.Errorf("Error reading remote info: %v", err)
	}

	fmt.Fprintf(cli.out, "Containers: %d\n", info.Containers)
	fmt.Fprintf(cli.out, "Images: %d\n", info.Images)
	ioutils.FprintfIfNotEmpty(cli.out, "Storage Driver: %s\n", info.Driver)
	if info.DriverStatus != nil {
		for _, pair := range info.DriverStatus {
			fmt.Fprintf(cli.out, " %s: %s\n", pair[0], pair[1])
		}
	}
	ioutils.FprintfIfNotEmpty(cli.out, "Execution Driver: %s\n", info.ExecutionDriver)
	ioutils.FprintfIfNotEmpty(cli.out, "Logging Driver: %s\n", info.LoggingDriver)
	ioutils.FprintfIfNotEmpty(cli.out, "Kernel Version: %s\n", info.KernelVersion)
	ioutils.FprintfIfNotEmpty(cli.out, "Operating System: %s\n", info.OperatingSystem)
	fmt.Fprintf(cli.out, "CPUs: %d\n", info.NCPU)
	fmt.Fprintf(cli.out, "Total Memory: %s\n", units.BytesSize(float64(info.MemTotal)))
	ioutils.FprintfIfNotEmpty(cli.out, "Name: %s\n", info.Name)
	ioutils.FprintfIfNotEmpty(cli.out, "ID: %s\n", info.ID)

	if info.Debug {
		fmt.Fprintf(cli.out, "Debug mode (server): %v\n", info.Debug)
		fmt.Fprintf(cli.out, "File Descriptors: %d\n", info.NFd)
		fmt.Fprintf(cli.out, "Goroutines: %d\n", info.NGoroutines)
		fmt.Fprintf(cli.out, "System Time: %s\n", info.SystemTime)
		fmt.Fprintf(cli.out, "EventsListeners: %d\n", info.NEventsListener)
		fmt.Fprintf(cli.out, "Init SHA1: %s\n", info.InitSha1)
		fmt.Fprintf(cli.out, "Init Path: %s\n", info.InitPath)
		fmt.Fprintf(cli.out, "Docker Root Dir: %s\n", info.DockerRootDir)
	}

	ioutils.FprintfIfNotEmpty(cli.out, "Http Proxy: %s\n", info.HttpProxy)
	ioutils.FprintfIfNotEmpty(cli.out, "Https Proxy: %s\n", info.HttpsProxy)
	ioutils.FprintfIfNotEmpty(cli.out, "No Proxy: %s\n", info.NoProxy)

	if info.IndexServerAddress != "" {
		u := cli.configFile.AuthConfigs[info.IndexServerAddress].Username
		if len(u) > 0 {
			fmt.Fprintf(cli.out, "Username: %v\n", u)
			fmt.Fprintf(cli.out, "Registry: %v\n", info.IndexServerAddress)
		}
	}
	// Only output these warnings if the server supports these features
	if h, err := httputils.ParseServerHeader(serverResp.header.Get("Server")); err == nil {
		if h.OS != "windows" {
			if !info.MemoryLimit {
				fmt.Fprintf(cli.err, "WARNING: No memory limit support\n")
			}
			if !info.SwapLimit {
				fmt.Fprintf(cli.err, "WARNING: No swap limit support\n")
			}
			if !info.IPv4Forwarding {
				fmt.Fprintf(cli.err, "WARNING: IPv4 forwarding is disabled.\n")
			}
			if !info.BridgeNfIptables {
				fmt.Fprintf(cli.err, "WARNING: bridge-nf-call-iptables is disabled\n")
			}
			if !info.BridgeNfIp6tables {
				fmt.Fprintf(cli.err, "WARNING: bridge-nf-call-ip6tables is disabled\n")
			}
		}
	}

	if info.Labels != nil {
		fmt.Fprintln(cli.out, "Labels:")
		for _, attribute := range info.Labels {
			fmt.Fprintf(cli.out, " %s\n", attribute)
		}
	}

	if info.ExperimentalBuild {
		fmt.Fprintf(cli.out, "Experimental: true\n")
	}

	return nil
}

//.........这里部分代码省略.........
			memorySwap = parsedMemorySwap
		}
	}
	// Send the build context
	v := &url.Values{}

	//Check if the given image name can be resolved
	if *tag != "" {
		repository, tag := parsers.ParseRepositoryTag(*tag)
		if err := registry.ValidateRepositoryName(repository); err != nil {
			return err
		}
		if len(tag) > 0 {
			if err := tags.ValidateTagName(tag); err != nil {
				return err
			}
		}
	}

	v.Set("t", *tag)

	if *suppressOutput {
		v.Set("q", "1")
	}
	if isRemote {
		v.Set("remote", cmd.Arg(0))
	}
	if *noCache {
		v.Set("nocache", "1")
	}
	if *rm {
		v.Set("rm", "1")
	} else {
		v.Set("rm", "0")
	}

	if *forceRm {
		v.Set("forcerm", "1")
	}

	if *pull {
		v.Set("pull", "1")
	}

	v.Set("cpusetcpus", *flCPUSetCpus)
	v.Set("cpusetmems", *flCPUSetMems)
	v.Set("cpushares", strconv.FormatInt(*flCPUShares, 10))
	v.Set("cpuquota", strconv.FormatInt(*flCpuQuota, 10))
	v.Set("cpuperiod", strconv.FormatInt(*flCpuPeriod, 10))
	v.Set("memory", strconv.FormatInt(memory, 10))
	v.Set("memswap", strconv.FormatInt(memorySwap, 10))
	v.Set("cgroupparent", *flCgroupParent)

	v.Set("dockerfile", *dockerfileName)

	ulimitsVar := flUlimits.GetList()
	ulimitsJson, err := json.Marshal(ulimitsVar)
	if err != nil {
		return err
	}
	v.Set("ulimits", string(ulimitsJson))

	headers := http.Header(make(map[string][]string))
	buf, err := json.Marshal(cli.configFile.AuthConfigs)
	if err != nil {
		return err
	}
	headers.Add("X-Registry-Config", base64.URLEncoding.EncodeToString(buf))

	if context != nil {
		headers.Set("Content-Type", "application/tar")
	}
	sopts := &streamOpts{
		rawTerminal: true,
		in:          body,
		out:         cli.out,
		headers:     headers,
	}

	serverResp, err := cli.stream("POST", fmt.Sprintf("/build?%s", v.Encode()), sopts)

	// Windows: show error message about modified file permissions.
	if runtime.GOOS == "windows" {
		h, err := httputils.ParseServerHeader(serverResp.header.Get("Server"))
		if err == nil {
			if h.OS != "windows" {
				fmt.Fprintln(cli.err, `SECURITY WARNING: You are building a Docker image from Windows against a non-Windows Docker host. All files and directories added to build context will have '-rwxr-xr-x' permissions. It is recommended to double check and reset permissions for sensitive files and directories.`)
			}
		}
	}

	if jerr, ok := err.(*jsonmessage.JSONError); ok {
		// If no error code is set, default to 1
		if jerr.Code == 0 {
			jerr.Code = 1
		}
		return Cli.StatusError{Status: jerr.Message, StatusCode: jerr.Code}
	}
	return err
}

// CmdInfo displays system-wide information.
//
// Usage: docker info
func (cli *DockerCli) CmdInfo(args ...string) error {
	cmd := Cli.Subcmd("info", nil, Cli.DockerCommands["info"].Description, true)
	cmd.Require(flag.Exact, 0)

	cmd.ParseFlags(args, true)

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

	defer serverResp.body.Close()

	info := &types.Info{}
	if err := json.NewDecoder(serverResp.body).Decode(info); err != nil {
		return fmt.Errorf("Error reading remote info: %v", err)
	}

	fmt.Fprintf(cli.out, "Containers: %d\n", info.Containers)
	fmt.Fprintf(cli.out, "Images: %d\n", info.Images)
	ioutils.FprintfIfNotEmpty(cli.out, "Server Version: %s\n", info.ServerVersion)
	ioutils.FprintfIfNotEmpty(cli.out, "Storage Driver: %s\n", info.Driver)
	if info.DriverStatus != nil {
		for _, pair := range info.DriverStatus {
			fmt.Fprintf(cli.out, " %s: %s\n", pair[0], pair[1])
		}
	}
	ioutils.FprintfIfNotEmpty(cli.out, "Execution Driver: %s\n", info.ExecutionDriver)
	ioutils.FprintfIfNotEmpty(cli.out, "Logging Driver: %s\n", info.LoggingDriver)

	fmt.Fprintf(cli.out, "Plugins: \n")
	fmt.Fprintf(cli.out, " Volume:")
	for _, driver := range info.Plugins.Volume {
		fmt.Fprintf(cli.out, " %s", driver)
	}
	fmt.Fprintf(cli.out, "\n")
	fmt.Fprintf(cli.out, " Network:")
	for _, driver := range info.Plugins.Network {
		fmt.Fprintf(cli.out, " %s", driver)
	}
	fmt.Fprintf(cli.out, "\n")

	ioutils.FprintfIfNotEmpty(cli.out, "Kernel Version: %s\n", info.KernelVersion)
	ioutils.FprintfIfNotEmpty(cli.out, "Operating System: %s\n", info.OperatingSystem)
	ioutils.FprintfIfNotEmpty(cli.out, "OSType: %s\n", info.OSType)
	ioutils.FprintfIfNotEmpty(cli.out, "Architecture: %s\n", info.Architecture)
	fmt.Fprintf(cli.out, "CPUs: %d\n", info.NCPU)
	fmt.Fprintf(cli.out, "Total Memory: %s\n", units.BytesSize(float64(info.MemTotal)))
	ioutils.FprintfIfNotEmpty(cli.out, "Name: %s\n", info.Name)
	ioutils.FprintfIfNotEmpty(cli.out, "ID: %s\n", info.ID)

	if info.Debug {
		fmt.Fprintf(cli.out, "Debug mode (server): %v\n", info.Debug)
		fmt.Fprintf(cli.out, " File Descriptors: %d\n", info.NFd)
		fmt.Fprintf(cli.out, " Goroutines: %d\n", info.NGoroutines)
		fmt.Fprintf(cli.out, " System Time: %s\n", info.SystemTime)
		fmt.Fprintf(cli.out, " EventsListeners: %d\n", info.NEventsListener)
		fmt.Fprintf(cli.out, " Init SHA1: %s\n", info.InitSha1)
		fmt.Fprintf(cli.out, " Init Path: %s\n", info.InitPath)
		fmt.Fprintf(cli.out, " Docker Root Dir: %s\n", info.DockerRootDir)
	}

	ioutils.FprintfIfNotEmpty(cli.out, "Http Proxy: %s\n", info.HTTPProxy)
	ioutils.FprintfIfNotEmpty(cli.out, "Https Proxy: %s\n", info.HTTPSProxy)
	ioutils.FprintfIfNotEmpty(cli.out, "No Proxy: %s\n", info.NoProxy)

	if info.IndexServerAddress != "" {
		u := cli.configFile.AuthConfigs[info.IndexServerAddress].Username
		if len(u) > 0 {
			fmt.Fprintf(cli.out, "Username: %v\n", u)
			fmt.Fprintf(cli.out, "Registry: %v\n", info.IndexServerAddress)
		}
	}

	// Only output these warnings if the server does not support these features
	if h, err := httputils.ParseServerHeader(serverResp.header.Get("Server")); err == nil {
		if h.OS != "windows" {
			if !info.MemoryLimit {
				fmt.Fprintf(cli.err, "WARNING: No memory limit support\n")
			}
			if !info.SwapLimit {
				fmt.Fprintf(cli.err, "WARNING: No swap limit support\n")
			}
			if !info.OomKillDisable {
				fmt.Fprintf(cli.err, "WARNING: No oom kill disable support\n")
			}
			if !info.CPUCfsQuota {
				fmt.Fprintf(cli.err, "WARNING: No cpu cfs quota support\n")
			}
			if !info.CPUCfsPeriod {
				fmt.Fprintf(cli.err, "WARNING: No cpu cfs period support\n")
			}
			if !info.CPUShares {
				fmt.Fprintf(cli.err, "WARNING: No cpu shares support\n")
			}
			if !info.CPUSet {
				fmt.Fprintf(cli.err, "WARNING: No cpuset support\n")
//.........这里部分代码省略.........