volume

package
v1.12.2-rc1 Latest Latest
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Published: Sep 27, 2016 License: Apache-2.0 Imports: 8 Imported by: 0

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Constants

View Source
const (
	LocalScope  = "local"
	GlobalScope = "global"
)

Scopes define if a volume has is cluster-wide (global) or local only. Scopes are returned by the volume driver when it is queried for capabilities and then set on a volume

View Source
const (
	// DefaultCopyMode is the copy mode used by default for normal/named volumes
	DefaultCopyMode = true
)
View Source
const DefaultDriverName = "local"

DefaultDriverName is the driver name used for the driver implemented in the local package.

View Source
const DefaultPropagationMode string = "rprivate"

DefaultPropagationMode defines what propagation mode should be used by default if user has not specified one explicitly.

Variables

This section is empty.

Functions

func GetPropagation added in v1.10.0

func GetPropagation(mode string) string

GetPropagation extracts and returns the mount propagation mode. If there are no specifications, then by default it is "private".

func HasPropagation added in v1.10.0

func HasPropagation(mode string) bool

HasPropagation checks if there is a valid propagation mode present in passed string. Returns true if a valid propagation mode specifier is present, false otherwise.

func IsVolumeNameValid added in v1.10.0

func IsVolumeNameValid(name string) (bool, error)

IsVolumeNameValid checks a volume name in a platform specific manner.

func ParseVolumeSource added in v1.10.0

func ParseVolumeSource(spec string) (string, string)

ParseVolumeSource parses the origin sources that's mounted into the container. It returns a name and a source. It looks to see if the spec passed in is an absolute file. If it is, it assumes the spec is a source. If not, it assumes the spec is a name.

func ParseVolumesFrom added in v1.10.0

func ParseVolumesFrom(spec string) (string, string, error)

ParseVolumesFrom ensures that the supplied volumes-from is valid.

func ReadWrite added in v1.8.0

func ReadWrite(mode string) bool

ReadWrite tells you if a mode string is a valid read-write mode or not. If there are no specifications w.r.t read write mode, then by default it returns true.

func ValidMountMode added in v1.9.0

func ValidMountMode(mode string) bool

ValidMountMode will make sure the mount mode is valid. returns if it's a valid mount mode or not.

Types

type Capability added in v1.12.0

type Capability struct {
	// Scope is the scope of the driver, `global` or `local`
	// A `global` scope indicates that the driver manages volumes across the cluster
	// A `local` scope indicates that the driver only manages volumes resources local to the host
	// Scope is declared by the driver
	Scope string
}

Capability defines a set of capabilities that a driver is able to handle.

type Driver

type Driver interface {
	// Name returns the name of the volume driver.
	Name() string
	// Create makes a new volume with the given id.
	Create(name string, opts map[string]string) (Volume, error)
	// Remove deletes the volume.
	Remove(vol Volume) (err error)
	// List lists all the volumes the driver has
	List() ([]Volume, error)
	// Get retrieves the volume with the requested name
	Get(name string) (Volume, error)
	// Scope returns the scope of the driver (e.g. `golbal` or `local`).
	// Scope determines how the driver is handled at a cluster level
	Scope() string
}

Driver is for creating and removing volumes.

type LabeledVolume added in v1.12.0

type LabeledVolume interface {
	Labels() map[string]string
	Volume
}

LabeledVolume wraps a Volume with user-defined labels

type MountPoint added in v1.10.0

type MountPoint struct {
	Source      string // Container host directory
	Destination string // Inside the container
	RW          bool   // True if writable
	Name        string // Name set by user
	Driver      string // Volume driver to use
	Volume      Volume `json:"-"`

	// Note Mode is not used on Windows
	Mode string `json:"Relabel"` // Originally field was `Relabel`"

	// Note Propagation is not used on Windows
	Propagation string // Mount propagation string
	Named       bool   // specifies if the mountpoint was specified by name

	// Specifies if data should be copied from the container before the first mount
	// Use a pointer here so we can tell if the user set this value explicitly
	// This allows us to error out when the user explicitly enabled copy but we can't copy due to the volume being populated
	CopyData bool `json:"-"`
	// ID is the opaque ID used to pass to the volume driver.
	// This should be set by calls to `Mount` and unset by calls to `Unmount`
	ID string
}

MountPoint is the intersection point between a volume and a container. It specifies which volume is to be used and where inside a container it should be mounted.

func ParseMountSpec added in v1.10.0

func ParseMountSpec(spec, volumeDriver string) (*MountPoint, error)

ParseMountSpec validates the configuration of mount information is valid.

func (*MountPoint) BackwardsCompatible added in v1.10.0

func (m *MountPoint) BackwardsCompatible() bool

BackwardsCompatible decides whether this mount point can be used in old versions of Docker or not. Only bind mounts and local volumes can be used in old versions of Docker.

func (*MountPoint) HasResource added in v1.10.0

func (m *MountPoint) HasResource(absolutePath string) bool

HasResource checks whether the given absolute path for a container is in this mount point. If the relative path starts with `../` then the resource is outside of this mount point, but we can't simply check for this prefix because it misses `..` which is also outside of the mount, so check both.

func (*MountPoint) Path added in v1.10.0

func (m *MountPoint) Path() string

Path returns the path of a volume in a mount point.

func (*MountPoint) Setup added in v1.10.0

func (m *MountPoint) Setup(mountLabel string) (string, error)

Setup sets up a mount point by either mounting the volume if it is configured, or creating the source directory if supplied.

func (*MountPoint) Type added in v1.12.0

func (m *MountPoint) Type() string

Type returns the type of mount point

type ScopedVolume added in v1.12.0

type ScopedVolume interface {
	Scope() string
	Volume
}

ScopedVolume wraps a volume with a cluster scope (e.g., `local` or `global`)

type Volume

type Volume interface {
	// Name returns the name of the volume
	Name() string
	// DriverName returns the name of the driver which owns this volume.
	DriverName() string
	// Path returns the absolute path to the volume.
	Path() string
	// Mount mounts the volume and returns the absolute path to
	// where it can be consumed.
	Mount(id string) (string, error)
	// Unmount unmounts the volume when it is no longer in use.
	Unmount(id string) error
	// Status returns low-level status information about a volume
	Status() map[string]interface{}
}

Volume is a place to store data. It is backed by a specific driver, and can be mounted.

Directories

Path Synopsis
Package local provides the default implementation for volumes.
Package local provides the default implementation for volumes.

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