package aufs

import "github.com/dotcloud/docker/daemon/graphdriver/aufs"

Index ¶

• Variables
• func Init(root string, options []string, uidMaps, gidMaps []idtools.IDMap) (graphdriver.Driver, error)
• func Unmount(target string) error
• type Driver
• func (a *Driver) ApplyDiff(id, parent string, diff archive.Reader) (size int64, err error)
• func (a *Driver) Changes(id, parent string) ([]archive.Change, error)
• func (a *Driver) Cleanup() error
• func (a *Driver) Create(id, parent string) error
• func (a *Driver) Diff(id, parent string) (archive.Archive, error)
• func (a *Driver) DiffSize(id, parent string) (size int64, err error)
• func (a *Driver) Exists(id string) bool
• func (a *Driver) Get(id, mountLabel string) (string, error)
• func (a *Driver) GetMetadata(id string) (map[string]string, error)
• func (a *Driver) Migrate(pth string, setupInit func(p string, rootUID, rootGID int) error) error
• func (a *Driver) Put(id string) error
• func (a *Driver) Remove(id string) error
• func (a *Driver) Status() [][2]string
• func (*Driver) String() string

Variables ¶

var (
	// ErrAufsNotSupported is returned if aufs is not supported by the host.
	ErrAufsNotSupported = fmt.Errorf("AUFS was not found in /proc/filesystems")
)

Functions ¶

func Init ¶

func Init(root string, options []string, uidMaps, gidMaps []idtools.IDMap) (graphdriver.Driver, error)

Init returns a new AUFS driver. An error is returned if AUFS is not supported.

func Unmount ¶

func Unmount(target string) error

Unmount the target specified.

Types ¶

type Driver ¶

type Driver struct {
	sync.Mutex // Protects concurrent modification to active
	// contains filtered or unexported fields
}

Driver contains information about the filesystem mounted. root of the filesystem sync.Mutex to protect against concurrent modifications active maps mount id to the count

func (*Driver) ApplyDiff ¶

func (a *Driver) ApplyDiff(id, parent string, diff archive.Reader) (size int64, err error)

ApplyDiff extracts the changeset from the given diff into the layer with the specified id and parent, returning the size of the new layer in bytes.

func (*Driver) Changes ¶

func (a *Driver) Changes(id, parent string) ([]archive.Change, error)

Changes produces a list of changes between the specified layer and its parent layer. If parent is "", then all changes will be ADD changes.

func (*Driver) Cleanup ¶

func (a *Driver) Cleanup() error

Cleanup aufs and unmount all mountpoints

func (*Driver) Create ¶

func (a *Driver) Create(id, parent string) error

Create three folders for each id mnt, layers, and diff

func (*Driver) Diff ¶

func (a *Driver) Diff(id, parent string) (archive.Archive, error)

Diff produces an archive of the changes between the specified layer and its parent layer which may be "".

func (*Driver) DiffSize ¶

func (a *Driver) DiffSize(id, parent string) (size int64, err error)

DiffSize calculates the changes between the specified id and its parent and returns the size in bytes of the changes relative to its base filesystem directory.

func (*Driver) Exists ¶

func (a *Driver) Exists(id string) bool

Exists returns true if the given id is registered with this driver

func (*Driver) Get ¶

func (a *Driver) Get(id, mountLabel string) (string, error)

Get returns the rootfs path for the id. This will mount the dir at it's given path

func (*Driver) GetMetadata ¶

func (a *Driver) GetMetadata(id string) (map[string]string, error)

GetMetadata not implemented

func (*Driver) Migrate ¶

func (a *Driver) Migrate(pth string, setupInit func(p string, rootUID, rootGID int) error) error

Migrate existing images and containers from docker < 0.7.x

The format pre 0.7 is for docker to store the metadata and filesystem content in the same directory. For the migration to work we need to move Image layer data from /var/lib/docker/graph/<id>/layers to the diff of the registered id.

Next we need to migrate the container's rw layer to diff of the driver. After the contents are migrated we need to register the image and container ids with the driver.

For the migration we try to move the folder containing the layer files, if that fails because the data is currently mounted we will fallback to creating a symlink.

func (*Driver) Put ¶

func (a *Driver) Put(id string) error

Put unmounts and updates list of active mounts.

func (*Driver) Remove ¶

func (a *Driver) Remove(id string) error

Remove will unmount and remove the given id.

func (*Driver) Status ¶

func (a *Driver) Status() [][2]string

Status returns current information about the filesystem such as root directory, number of directories mounted, etc.

func (*Driver) String ¶

func (*Driver) String() string

Source Files ¶

aufs.go dirs.go migrate.go mount.go mount_linux.go