Golang graphdriver.NaiveDiffDriver函数代码示例

func Init(home string, options []string) (graphdriver.Driver, error) {
	rootdir := path.Dir(home)

	var buf syscall.Statfs_t
	if err := syscall.Statfs(rootdir, &buf); err != nil {
		return nil, err
	}

	if graphdriver.FsMagic(buf.Type) != graphdriver.FsMagicBtrfs {
		return nil, graphdriver.ErrPrerequisites
	}

	if err := os.MkdirAll(home, 0700); err != nil {
		return nil, err
	}

	if err := graphdriver.MakePrivate(home); err != nil {
		return nil, err
	}

	driver := &Driver{
		home: home,
	}

	return graphdriver.NaiveDiffDriver(driver), nil
}

// Init creates a driver with the given home and the set of options.
func Init(home string, options []string) (graphdriver.Driver, error) {
	fsMagic, err := graphdriver.GetFSMagic(home)
	if err != nil {
		return nil, err
	}
	if fsName, ok := graphdriver.FsNames[fsMagic]; ok {
		backingFs = fsName
	}

	deviceSet, err := NewDeviceSet(home, true, options)
	if err != nil {
		return nil, err
	}

	if err := mount.MakePrivate(home); err != nil {
		return nil, err
	}

	d := &Driver{
		DeviceSet: deviceSet,
		home:      home,
	}

	return graphdriver.NaiveDiffDriver(d), nil
}

func main() {
	s := Struct{
		x: 1,
	}
	if s.t.IsZero() {
		fmt.Println("s.t is nil, %v %v", s.t, s)
	}
	fmt.Println("%v", s.t)

	var used, total uint64 = 9, 18

	fmt.Println(float64(used)/float64(total) > 0.4)

	var f float64 = 12.45
	fmtFloat := strconv.FormatFloat(f, 'f', 3, 64)
	fmt.Println(fmtFloat)
	fmt.Println(strconv.ParseFloat(fmtFloat, 64))

	if "xx" == "x" {
		fmt.Println("xx==x")
	}
	if "xx" == "xx" {
		fmt.Println("xx==xx")
	}
	s1 := Struct1{
		a: 1,
		Struct: Struct{
			x: 3,
			y: 5,
		},
	}
	fmt.Println(reflect.TypeOf(s1.Struct).String())
	fmt.Println(s1.Struct.x)
	d := &Driver{
		h: 4,
	}
	fmt.Println(d.M())
	driver := graphdriver.NaiveDiffDriver(d)
	fmt.Println(driver)
	fmt.Println(reflect.TypeOf(driver.(graphdriver.ProtoDriver)).String())
	fmt.Println(reflect.TypeOf(driver).String())
	fmt.Println(reflect.ValueOf(driver).Elem().FieldByName("ProtoDriver").Elem())
	fmt.Println(reflect.ValueOf(driver).Elem().FieldByName("ProtoDriver").Elem().Elem())
	fmt.Println(reflect.ValueOf(driver).Elem().FieldByName("ProtoDriver").Elem().Elem().FieldByName("h").Int())
	fmt.Println(reflect.ValueOf(driver).Elem().FieldByName("ProtoDriver").Elem().Interface().(*Driver).M())
	//	fmt.Println(reflect.ValueOf(driver).Elem().FieldByName("ProtoDriver").Elem().Elem().Interface().(Driver).M())
	//	fmt.Println(driver.(graphdriver.ProtoDriver).(*Driver))
	//	fmt.Println(driver.(graphdriver.ProtoDriver).(*Driver).h)
	fmt.Printf("%#v", driver.String())
	fmt.Println()
	//	fmt.Printf("%#v", driver.(graphdriver.ProtoDriver).(*Driver))
}

func Init(home string, options []string) (graphdriver.Driver, error) {
	deviceSet, err := NewDeviceSet(home, true, options)
	if err != nil {
		return nil, err
	}

	if err := mount.MakePrivate(home); err != nil {
		return nil, err
	}

	d := &Driver{
		DeviceSet: deviceSet,
		home:      home,
	}

	return graphdriver.NaiveDiffDriver(d), nil
}

func Init(home string, options []string) (graphdriver.Driver, error) {
	if err := os.MkdirAll(home, 0700); err != nil && !os.IsExist(err) {
		log.Errorf("Rbd create home dir %s failed: %v", err)
		return nil, err
	}

	rbdSet, err := NewRbdSet(home, true, options)
	if err != nil {
		return nil, err
	}

	if err := graphdriver.MakePrivate(home); err != nil {
		return nil, err
	}

	d := &RbdDriver{
		RbdSet: rbdSet,
		home:   home,
	}

	return graphdriver.NaiveDiffDriver(d), nil
}

func Init(home string, options []string) (graphdriver.Driver, error) {
	d := &Driver{
		home: home,
	}
	return graphdriver.NaiveDiffDriver(d), nil
}

// Init returns a new ZFS driver.
// It takes base mount path and a array of options which are represented as key value pairs.
// Each option is in the for key=value. 'zfs.fsname' is expected to be a valid key in the options.
func Init(base string, opt []string) (graphdriver.Driver, error) {
	var err error

	if _, err := exec.LookPath("zfs"); err != nil {
		logrus.Debugf("[zfs] zfs command is not available: %v", err)
		return nil, graphdriver.ErrPrerequisites
	}

	file, err := os.OpenFile("/dev/zfs", os.O_RDWR, 600)
	if err != nil {
		logrus.Debugf("[zfs] cannot open /dev/zfs: %v", err)
		return nil, graphdriver.ErrPrerequisites
	}
	defer file.Close()

	options, err := parseOptions(opt)
	if err != nil {
		return nil, err
	}
	options.mountPath = base

	rootdir := path.Dir(base)

	if options.fsName == "" {
		err = checkRootdirFs(rootdir)
		if err != nil {
			return nil, err
		}
	}

	if options.fsName == "" {
		options.fsName, err = lookupZfsDataset(rootdir)
		if err != nil {
			return nil, err
		}
	}

	zfs.SetLogger(new(Logger))

	filesystems, err := zfs.Filesystems(options.fsName)
	if err != nil {
		return nil, fmt.Errorf("Cannot find root filesystem %s: %v", options.fsName, err)
	}

	filesystemsCache := make(map[string]bool, len(filesystems))
	var rootDataset *zfs.Dataset
	for _, fs := range filesystems {
		if fs.Name == options.fsName {
			rootDataset = fs
		}
		filesystemsCache[fs.Name] = true
	}

	if rootDataset == nil {
		return nil, fmt.Errorf("BUG: zfs get all -t filesystem -rHp '%s' should contain '%s'", options.fsName, options.fsName)
	}

	d := &Driver{
		dataset:          rootDataset,
		options:          options,
		filesystemsCache: filesystemsCache,
	}
	return graphdriver.NaiveDiffDriver(d), nil
}

func NaiveDiffDriverWithApply(driver ApplyDiffProtoDriver) graphdriver.Driver {
	return &naiveDiffDriverWithApply{
		Driver:    graphdriver.NaiveDiffDriver(driver),
		applyDiff: driver,
	}
}

func (s *DockerExternalGraphdriverSuite) SetUpSuite(c *check.C) {
	mux := http.NewServeMux()
	s.server = httptest.NewServer(mux)

	type graphDriverRequest struct {
		ID         string `json:",omitempty"`
		Parent     string `json:",omitempty"`
		MountLabel string `json:",omitempty"`
	}

	type graphDriverResponse struct {
		Err      error             `json:",omitempty"`
		Dir      string            `json:",omitempty"`
		Exists   bool              `json:",omitempty"`
		Status   [][2]string       `json:",omitempty"`
		Metadata map[string]string `json:",omitempty"`
		Changes  []archive.Change  `json:",omitempty"`
		Size     int64             `json:",omitempty"`
	}

	respond := func(w http.ResponseWriter, data interface{}) {
		w.Header().Set("Content-Type", "appplication/vnd.docker.plugins.v1+json")
		switch t := data.(type) {
		case error:
			fmt.Fprintln(w, fmt.Sprintf(`{"Err": %s}`, t.Error()))
		case string:
			fmt.Fprintln(w, t)
		default:
			json.NewEncoder(w).Encode(&data)
		}
	}

	base, err := ioutil.TempDir("", "external-graph-test")
	c.Assert(err, check.IsNil)
	vfsProto, err := vfs.Init(base, []string{})
	if err != nil {
		c.Fatalf("error initializing graph driver: %v", err)
	}
	driver := graphdriver.NaiveDiffDriver(vfsProto)

	mux.HandleFunc("/Plugin.Activate", func(w http.ResponseWriter, r *http.Request) {
		s.ec.activations++
		respond(w, `{"Implements": ["GraphDriver"]}`)
	})

	mux.HandleFunc("/GraphDriver.Init", func(w http.ResponseWriter, r *http.Request) {
		s.ec.init++
		respond(w, "{}")
	})

	mux.HandleFunc("/GraphDriver.Create", func(w http.ResponseWriter, r *http.Request) {
		s.ec.creations++

		var req graphDriverRequest
		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
			http.Error(w, err.Error(), 500)
			return
		}
		if err := driver.Create(req.ID, req.Parent); err != nil {
			respond(w, err)
			return
		}
		respond(w, "{}")
	})

	mux.HandleFunc("/GraphDriver.Remove", func(w http.ResponseWriter, r *http.Request) {
		s.ec.removals++

		var req graphDriverRequest
		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
			http.Error(w, err.Error(), 500)
			return
		}

		if err := driver.Remove(req.ID); err != nil {
			respond(w, err)
			return
		}
		respond(w, "{}")
	})

	mux.HandleFunc("/GraphDriver.Get", func(w http.ResponseWriter, r *http.Request) {
		s.ec.gets++

		var req graphDriverRequest
		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
			http.Error(w, err.Error(), 500)
		}

		dir, err := driver.Get(req.ID, req.MountLabel)
		if err != nil {
			respond(w, err)
			return
		}
		respond(w, &graphDriverResponse{Dir: dir})
	})

	mux.HandleFunc("/GraphDriver.Put", func(w http.ResponseWriter, r *http.Request) {
		s.ec.puts++

//.........这里部分代码省略.........