layer0

README

Layer0 Graph Driver

Layer0 implemenation piggy backs on existing overlay graphdriver implementation to provide persistent storage for the uppermost/writeable layer in the container rootfs. The persistent storage is derived from one of the OSD volume drivers.

To use this as the graphdriver in Docker with aws as the backend volume provider:

DOCKER_STORAGE_OPTIONS= -s layer0 --storage-opt layer0.volume_driver=aws

Documentation

Index

• Constants
• func Init(home string, options []string, uidMaps, gidMaps []idtools.IDMap) (graphdriver.Driver, error)
• type Layer0
  • func (l *Layer0) ApplyDiff(id string, parent string, diff archive.Reader) (size int64, err error)
  • func (l *Layer0) Create(id string, parent string, mountLabel string) error
  • func (l *Layer0) Exists(id string) bool
  • func (l *Layer0) Get(id string, mountLabel string) (string, error)
  • func (l *Layer0) GetMetadata(id string) (map[string]string, error)
  • func (l *Layer0) Put(id string) error
  • func (l *Layer0) Remove(id string) error
• type Layer0Vol

Constants

const (
	Name               = "layer0"
	Type               = api.Graph
	Layer0VolumeDriver = "layer0.volume_driver"
)

Layer0Graphdriver options. This should be passed in as a st

Functions

func Init

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

Types

type Layer0

type Layer0 struct {
	sync.Mutex
	// Driver is an implementation of GraphDriver. Only select methods are overridden
	graphdriver.Driver
	// contains filtered or unexported fields
}

func (*Layer0) ApplyDiff

func (l *Layer0) ApplyDiff(id string, parent string, diff archive.Reader) (size int64, err error)

func (*Layer0) Create

func (l *Layer0) Create(id string, parent string, mountLabel string) error

func (*Layer0) Exists

func (l *Layer0) Exists(id string) bool

func (*Layer0) Get

func (l *Layer0) Get(id string, mountLabel string) (string, error)

func (*Layer0) GetMetadata

func (l *Layer0) GetMetadata(id string) (map[string]string, error)

func (*Layer0) Put

func (l *Layer0) Put(id string) error

func (*Layer0) Remove

func (l *Layer0) Remove(id string) error

type Layer0Vol

type Layer0Vol struct {
	// contains filtered or unexported fields
}