daemon

package
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 Go to latest Published: Nov 2, 2015 License: Apache-2.0 Imports: 107 Imported by: 0

README

This directory contains code pertaining to running containers and storing images

Code pertaining to running containers:

  • execdriver

Code pertaining to storing images:

  • graphdriver

Documentation

Overview

Package daemon exposes the functions that occur on the host server that the Docker daemon is running.

In implementing the various functions of the daemon, there is often a method-specific struct for configuring the runtime behavior.

Index

Constants

View Source 
const (
	// NetworkByID represents a constant to find a network by its ID
	NetworkByID = iota + 1
	// NetworkByName represents a constant to find a network by its Name
	NetworkByName
)
View Source 
const DefaultPathEnv = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

DefaultPathEnv is unix style list of directories to search for executables. Each directory is separated from the next by a colon ':' character .

Variables

View Source 
var ErrExtractPointNotDirectory = errors.New("extraction point is not a directory")

ErrExtractPointNotDirectory is used to convey that the operation to extract a tar archive to a directory in a container has failed because the specified path does not refer to a directory.

View Source 
var (
	// ErrRootFSReadOnly is returned when a container
	// rootfs is marked readonly.
	ErrRootFSReadOnly = errors.New("container rootfs is marked read-only")
)
View Source 
var (
	// ErrVolumeReadonly is used to signal an error when trying to copy data into
	// a volume mount that is not writable.
	ErrVolumeReadonly = errors.New("mounted volume is marked read-only")
)

Functions

func GetFullContainerName 

func GetFullContainerName(name string) (string, error)

GetFullContainerName returns a constructed container name. I think it has to do with the fact that a container is a file on disk and this is sort of just creating a file name.

Types

type CommonConfig 

type CommonConfig struct {
	AutoRestart    bool
	Bridge         bridgeConfig // Bridge holds bridge network specific configuration.
	Context        map[string][]string
	DisableBridge  bool
	DNS            []string
	DNSOptions     []string
	DNSSearch      []string
	ExecDriver     string
	ExecOptions    []string
	ExecRoot       string
	GraphDriver    string
	GraphOptions   []string
	Labels         []string
	LogConfig      runconfig.LogConfig
	Mtu            int
	Pidfile        string
	RemappedRoot   string
	Root           string
	TrustKeyPath   string
	DefaultNetwork string

	// ClusterStore is the storage backend used for the cluster information. It is used by both
	// multihost networking (to store networks and endpoints information) and by the node discovery
	// mechanism.
	ClusterStore string

	// ClusterOpts is used to pass options to the discovery package for tuning libkv settings, such
	// as TLS configuration settings.
	ClusterOpts map[string]string

	// ClusterAdvertise is the network endpoint that the Engine advertises for the purpose of node
	// discovery. This should be a 'host:port' combination on which that daemon instance is
	// reachable by other hosts.
	ClusterAdvertise string
}

CommonConfig defines the configuration of a docker daemon which are common across platforms.

type CommonContainer 

type CommonContainer struct {

	// embed for Container to support states directly.
	*State `json:"State"` // Needed for remote api version <= 1.11

	ID              string
	Created         time.Time
	Path            string
	Args            []string
	Config          *runconfig.Config
	ImageID         string `json:"Image"`
	NetworkSettings *network.Settings
	LogPath         string
	Name            string
	Driver          string
	ExecDriver      string
	// MountLabel contains the options for the 'mount' command
	MountLabel             string
	ProcessLabel           string
	RestartCount           int
	HasBeenStartedBefore   bool
	HasBeenManuallyStopped bool // used for unless-stopped restart policy
	MountPoints            map[string]*volume.MountPoint
	// contains filtered or unexported fields
}

CommonContainer holds the fields for a container which are applicable across all platforms supported by the daemon.

func (*CommonContainer) StderrPipe 

func (streamConfig *CommonContainer) StderrPipe() io.ReadCloser

func (*CommonContainer) StdinPipe 

func (streamConfig *CommonContainer) StdinPipe() io.WriteCloser

func (*CommonContainer) StdoutPipe 

func (streamConfig *CommonContainer) StdoutPipe() io.ReadCloser

type Config 

type Config struct {
	CommonConfig

	CorsHeaders          string
	EnableCors           bool
	EnableSelinuxSupport bool
	RemappedRoot         string
	SocketGroup          string
	Ulimits              map[string]*ulimit.Ulimit
}

Config defines the configuration of a docker daemon. These are the configuration settings that you pass to the docker daemon when you launch it with say: `docker daemon -e lxc`

func (*Config) InstallCommonFlags 

func (config *Config) InstallCommonFlags(cmd *flag.FlagSet, usageFn func(string) string)

InstallCommonFlags adds command-line options to the top-level flag parser for the current process. Subsequent calls to `flag.Parse` will populate config with values parsed from the command-line.

func (*Config) InstallFlags 

func (config *Config) InstallFlags(cmd *flag.FlagSet, usageFn func(string) string)

InstallFlags adds command-line options to the top-level flag parser for the current process. Subsequent calls to `flag.Parse` will populate config with values parsed from the command-line.

type Container 

type Container struct {
	CommonContainer

	AppArmorProfile string
	HostnamePath    string
	HostsPath       string
	ShmPath         string // TODO Windows - Factor this out (GH15862)
	MqueuePath      string // TODO Windows - Factor this out (GH15862)
	ResolvConfPath  string

	Volumes   map[string]string // Deprecated since 1.7, kept for backwards compatibility
	VolumesRW map[string]bool   // Deprecated since 1.7, kept for backwards compatibility
	// contains filtered or unexported fields
}

Container holds the fields specific to unixen implementations. See CommonContainer for standard fields common to all containers.

func (*Container) ArchivePath 

func (container *Container) ArchivePath(path string) (content io.ReadCloser, stat *types.ContainerPathStat, err error)

ArchivePath creates an archive of the filesystem resource at the specified path in this container. Returns a tar archive of the resource and stat info about the resource.

func (*Container) Attach 

func (container *Container) Attach(stdin io.ReadCloser, stdout io.Writer, stderr io.Writer) chan error

Attach connects to the container's TTY, delegating to standard streams or websockets depending on the configuration.

func (*Container) ConnectToNetwork 

func (container *Container) ConnectToNetwork(idOrName string) error

ConnectToNetwork connects a container to a netork

func (*Container) DisconnectFromNetwork 

func (container *Container) DisconnectFromNetwork(n libnetwork.Network) error

DisconnectFromNetwork disconnects a container from a network

func (*Container) ExtractToDir 

func (container *Container) ExtractToDir(path string, noOverwriteDirNonDir bool, content io.Reader) (err error)

ExtractToDir extracts the given tar archive to the specified location in the filesystem of this container. The given path must be of a directory in the container. If it is not, the error will be ErrExtractPointNotDirectory. If noOverwriteDirNonDir is true then it will be an error if unpacking the given content would cause an existing directory to be replaced with a non- directory and vice versa.

func (*Container) GetResourcePath 

func (container *Container) GetResourcePath(path string) (string, error)

GetResourcePath evaluates `path` in the scope of the container's basefs, with proper path sanitisation. Symlinks are all scoped to the basefs of the container, as though the container's basefs was `/`.

The basefs of a container is the host-facing path which is bind-mounted as `/` inside the container. This method is essentially used to access a particular path inside the container as though you were a process in that container.

NOTE: The returned path is *only* safely scoped inside the container's basefs 

if no component of the returned path changes (such as a component
symlinking to a different path) between using this method and using the
path. See symlink.FollowSymlinkInScope for more details.

func (*Container) Kill 

func (container *Container) Kill() error

Kill forcefully terminates a container.

func (*Container) Mount 

func (container *Container) Mount() error

Mount sets container.basefs

func (*Container) Resize 

func (container *Container) Resize(h, w int) error

Resize changes the TTY of the process running inside the container to the given height and width. The container must be running.

func (*Container) Restart 

func (container *Container) Restart(seconds int) error

Restart attempts to gracefully stop and then start the container. When stopping, wait for the given duration in seconds to gracefully stop, before forcefully terminating the container. If given a negative duration, wait forever for a graceful stop.

func (*Container) Start 

func (container *Container) Start() (err error)

Start prepares the container to run by setting up everything the container needs, such as storage and networking, as well as links between containers. The container is left waiting for a signal to begin running.

func (*Container) StatPath 

func (container *Container) StatPath(path string) (stat *types.ContainerPathStat, err error)

StatPath stats the filesystem resource at the specified path in this container. Returns stat info about the resource.

func (*Container) StderrPipe 

func (streamConfig *Container) StderrPipe() io.ReadCloser

func (*Container) StdinPipe 

func (streamConfig *Container) StdinPipe() io.WriteCloser

func (*Container) StdoutPipe 

func (streamConfig *Container) StdoutPipe() io.ReadCloser

func (*Container) Stop 

func (container *Container) Stop(seconds int) error

Stop halts a container by sending a stop signal, waiting for the given duration in seconds, and then calling SIGKILL and waiting for the process to exit. If a negative duration is given, Stop will wait for the initial signal forever. If the container is not running Stop returns immediately.

func (*Container) Unmount 

func (container *Container) Unmount() error

Unmount asks the daemon to release the layered filesystems that are mounted by the container.

type ContainerAttachWithLogsConfig 

type ContainerAttachWithLogsConfig struct {
	InStream                       io.ReadCloser
	OutStream                      io.Writer
	UseStdin, UseStdout, UseStderr bool
	Logs, Stream                   bool
}

ContainerAttachWithLogsConfig holds the streams to use when connecting to a container to view logs.

type ContainerCommitConfig 

type ContainerCommitConfig struct {
	Pause   bool
	Repo    string
	Tag     string
	Author  string
	Comment string
	Config  *runconfig.Config
}

ContainerCommitConfig contains build configs for commit operation, and is used when making a commit with the current state of the container.

type ContainerCreateConfig 

type ContainerCreateConfig struct {
	Name            string
	Config          *runconfig.Config
	HostConfig      *runconfig.HostConfig
	AdjustCPUShares bool
}

ContainerCreateConfig is the parameter set to ContainerCreate()

type ContainerLogsConfig 

type ContainerLogsConfig struct {
	// if true stream log output
	Follow bool
	// if true include timestamps for each line of log output
	Timestamps bool
	// return that many lines of log output from the end
	Tail string
	// filter logs by returning on those entries after this time
	Since time.Time
	// whether or not to show stdout and stderr as well as log entries.
	UseStdout, UseStderr bool
	OutStream            io.Writer
	Stop                 <-chan bool
}

ContainerLogsConfig holds configs for logging operations. Exists for users of the daemon to to pass it a logging configuration.

type ContainerRmConfig 

type ContainerRmConfig struct {
	ForceRemove, RemoveVolume, RemoveLink bool
}

ContainerRmConfig is a holder for passing in runtime config.

type ContainerStatsConfig 

type ContainerStatsConfig struct {
	Stream    bool
	OutStream io.Writer
	Stop      <-chan bool
	Version   version.Version
}

ContainerStatsConfig holds information for configuring the runtime behavior of a daemon.ContainerStats() call.

type ContainerWsAttachWithLogsConfig 

type ContainerWsAttachWithLogsConfig struct {
	InStream             io.ReadCloser
	OutStream, ErrStream io.Writer
	Logs, Stream         bool
}

ContainerWsAttachWithLogsConfig attach with websockets, since all stream data is delegated to the websocket to handle there.

type ContainersConfig 

type ContainersConfig struct {
	// if true show all containers, otherwise only running containers.
	All bool
	// show all containers created after this container id
	Since string
	// show all containers created before this container id
	Before string
	// number of containers to return at most
	Limit int
	// if true include the sizes of the containers
	Size bool
	// return only containers that match filters
	Filters string
}

ContainersConfig is the filtering specified by the user to iterate over containers.

type Daemon 

type Daemon struct {
	ID string

	RegistryService *registry.Service
	EventsService   *events.Events
	// contains filtered or unexported fields
}

Daemon holds information about the Docker daemon.

func NewDaemon 

func NewDaemon(config *Config, registryService *registry.Service) (daemon *Daemon, err error)

NewDaemon sets up everything for the daemon to be able to service requests from the webserver.

func (*Daemon) AuthenticateToRegistry 

func (daemon *Daemon) AuthenticateToRegistry(authConfig *cliconfig.AuthConfig) (string, error)

AuthenticateToRegistry checks the validity of credentials in authConfig

func (*Daemon) Commit 

func (daemon *Daemon) Commit(container *Container, c *ContainerCommitConfig) (*image.Image, error)

Commit creates a new filesystem image from the current state of a container. The image can optionally be tagged into a repository.

func (*Daemon) ConnectContainerToNetwork 

func (daemon *Daemon) ConnectContainerToNetwork(containerName, networkName string) error

ConnectContainerToNetwork connects the given container to the given network. If either cannot be found, an err is returned. If the network cannot be set up, an err is returned.

func (*Daemon) ContainerArchivePath 

func (daemon *Daemon) ContainerArchivePath(name string, path string) (content io.ReadCloser, stat *types.ContainerPathStat, err error)

ContainerArchivePath creates an archive of the filesystem resource at the specified path in the container identified by the given name. Returns a tar archive of the resource and whether it was a directory or a single file.

func (*Daemon) ContainerAttachWithLogs 

func (daemon *Daemon) ContainerAttachWithLogs(prefixOrName string, c *ContainerAttachWithLogsConfig) error

ContainerAttachWithLogs attaches to logs according to the config passed in. See ContainerAttachWithLogsConfig.

func (*Daemon) ContainerChanges 

func (daemon *Daemon) ContainerChanges(name string) ([]archive.Change, error)

ContainerChanges returns a list of container fs changes

func (*Daemon) ContainerCopy 

func (daemon *Daemon) ContainerCopy(name string, res string) (io.ReadCloser, error)

ContainerCopy performs a deprecated operation of archiving the resource at the specified path in the conatiner identified by the given name.

func (*Daemon) ContainerCreate 

func (daemon *Daemon) ContainerCreate(params *ContainerCreateConfig) (types.ContainerCreateResponse, error)

ContainerCreate takes configs and creates a container.

func (*Daemon) ContainerExecCreate 

func (d *Daemon) ContainerExecCreate(config *runconfig.ExecConfig) (string, error)

ContainerExecCreate sets up an exec in a running container.

func (*Daemon) ContainerExecInspect 

func (daemon *Daemon) ContainerExecInspect(id string) (*ExecConfig, error)

ContainerExecInspect returns low-level information about the exec command. An error is returned if the exec cannot be found.

func (*Daemon) ContainerExecResize 

func (daemon *Daemon) ContainerExecResize(name string, height, width int) error

ContainerExecResize changes the size of the TTY of the process running in the exec with the given name to the given height and width.

func (*Daemon) ContainerExecStart 

func (d *Daemon) ContainerExecStart(name string, stdin io.ReadCloser, stdout io.Writer, stderr io.Writer) error

ContainerExecStart starts a previously set up exec instance. The std streams are set up.

func (*Daemon) ContainerExport 

func (daemon *Daemon) ContainerExport(name string, out io.Writer) error

ContainerExport writes the contents of the container to the given writer. An error is returned if the container cannot be found.

func (*Daemon) ContainerExtractToDir 

func (daemon *Daemon) ContainerExtractToDir(name, path string, noOverwriteDirNonDir bool, content io.Reader) error

ContainerExtractToDir extracts the given archive to the specified location in the filesystem of the container identified by the given name. The given path must be of a directory in the container. If it is not, the error will be ErrExtractPointNotDirectory. If noOverwriteDirNonDir is true then it will be an error if unpacking the given content would cause an existing directory to be replaced with a non-directory and vice versa.

func (*Daemon) ContainerInspect 

func (daemon *Daemon) ContainerInspect(name string, size bool) (*types.ContainerJSON, error)

ContainerInspect returns low-level information about a container. Returns an error if the container cannot be found, or if there is an error getting the data.

func (*Daemon) ContainerInspect120 

func (daemon *Daemon) ContainerInspect120(name string) (*v1p20.ContainerJSON, error)

ContainerInspect120 serializes the master version of a container into a json type.

func (*Daemon) ContainerInspectPre120 

func (daemon *Daemon) ContainerInspectPre120(name string) (*v1p19.ContainerJSON, error)

ContainerInspectPre120 gets containers for pre 1.20 APIs.

func (*Daemon) ContainerKill 

func (daemon *Daemon) ContainerKill(name string, sig uint64) error

ContainerKill send signal to the container If no signal is given (sig 0), then Kill with SIGKILL and wait for the container to exit. If a signal is given, then just send it to the container and return.

func (*Daemon) ContainerLogs 

func (daemon *Daemon) ContainerLogs(containerName string, config *ContainerLogsConfig) error

ContainerLogs hooks up a container's stdout and stderr streams configured with the given struct.

func (*Daemon) ContainerPause 

func (daemon *Daemon) ContainerPause(name string) error

ContainerPause pauses a container

func (*Daemon) ContainerRename 

func (daemon *Daemon) ContainerRename(oldName, newName string) error

ContainerRename changes the name of a container, using the oldName to find the container. An error is returned if newName is already reserved.

func (*Daemon) ContainerResize 

func (daemon *Daemon) ContainerResize(name string, height, width int) error

ContainerResize changes the size of the TTY of the process running in the container with the given name to the given height and width.

func (*Daemon) ContainerRestart 

func (daemon *Daemon) ContainerRestart(name string, seconds int) error

ContainerRestart stops and starts a container. It attempts to gracefully stop the container within the given timeout, forcefully stopping it if the timeout is exceeded. If given a negative timeout, ContainerRestart will wait forever until a graceful stop. Returns an error if the container cannot be found, or if there is an underlying error at any stage of the restart.

func (*Daemon) ContainerRm 

func (daemon *Daemon) ContainerRm(name string, config *ContainerRmConfig) error

ContainerRm removes the container id from the filesystem. An error is returned if the container is not found, or if the remove fails. If the remove succeeds, the container name is released, and network links are removed.

func (*Daemon) ContainerStart 

func (daemon *Daemon) ContainerStart(name string, hostConfig *runconfig.HostConfig) error

ContainerStart starts a container.

func (*Daemon) ContainerStatPath 

func (daemon *Daemon) ContainerStatPath(name string, path string) (stat *types.ContainerPathStat, err error)

ContainerStatPath stats the filesystem resource at the specified path in the container identified by the given name.

func (*Daemon) ContainerStats 

func (daemon *Daemon) ContainerStats(prefixOrName string, config *ContainerStatsConfig) error

ContainerStats writes information about the container to the stream given in the config object.

func (*Daemon) ContainerStop 

func (daemon *Daemon) ContainerStop(name string, seconds int) error

ContainerStop looks for the given container and terminates it, waiting the given number of seconds before forcefully killing the container. If a negative number of seconds is given, ContainerStop will wait for a graceful termination. An error is returned if the container is not found, is already stopped, or if there is a problem stopping the container.

func (*Daemon) ContainerTop 

func (daemon *Daemon) ContainerTop(name string, psArgs string) (*types.ContainerProcessList, error)

ContainerTop lists the processes running inside of the given container by calling ps with the given args, or with the flags "-ef" if no args are given. An error is returned if the container is not found, or is not running, or if there are any problems running ps, or parsing the output.

func (*Daemon) ContainerUnpause 

func (daemon *Daemon) ContainerUnpause(name string) error

ContainerUnpause unpauses a container

func (*Daemon) ContainerWait 

func (daemon *Daemon) ContainerWait(name string, timeout time.Duration) (int, error)

ContainerWait stops processing until the given container is stopped. If the container is not found, an error is returned. On a successful stop, the exit code of the container is returned. On a timeout, an error is returned. If you want to wait forever, supply a negative duration for the timeout.

func (*Daemon) ContainerWsAttachWithLogs 

func (daemon *Daemon) ContainerWsAttachWithLogs(prefixOrName string, c *ContainerWsAttachWithLogsConfig) error

ContainerWsAttachWithLogs websocket connection

func (*Daemon) Containers 

func (daemon *Daemon) Containers(config *ContainersConfig) ([]*types.Container, error)

Containers returns the list of containers to show given the user's filtering.

func (*Daemon) CreateNetwork 

func (daemon *Daemon) CreateNetwork(name, driver string, ipam network.IPAM, options map[string]string) (libnetwork.Network, error)

CreateNetwork creates a network with the given name, driver and other optional parameters

func (*Daemon) DisconnectContainerFromNetwork 

func (daemon *Daemon) DisconnectContainerFromNetwork(containerName string, network libnetwork.Network) error

DisconnectContainerFromNetwork disconnects the given container from the given network. If either cannot be found, an err is returned.

func (*Daemon) Exec 

func (d *Daemon) Exec(c *Container, ExecConfig *ExecConfig, pipes *execdriver.Pipes, startCallback execdriver.DriverCallback) (int, error)

Exec calls the underlying exec driver to run

func (*Daemon) ExecExists 

func (d *Daemon) ExecExists(name string) (bool, error)

ExecExists looks up the exec instance and returns a bool if it exists or not. It will also return the error produced by `getExecConfig`

func (*Daemon) ExecutionDriver 

func (daemon *Daemon) ExecutionDriver() execdriver.Driver

ExecutionDriver returns the currently used driver for creating and starting execs in a container.

func (*Daemon) Exists 

func (daemon *Daemon) Exists(id string) bool

Exists returns a true if a container of the specified ID or name exists, false otherwise.

func (*Daemon) ExportImage 

func (daemon *Daemon) ExportImage(names []string, outStream io.Writer) error

ExportImage exports a list of images to the given output stream. The exported images are archived into a tar when written to the output stream. All images with the given tag and all versions containing the same tag are exported. names is the set of tags to export, and outStream is the writer which the images are written to.

func (*Daemon) FindNetwork 

func (daemon *Daemon) FindNetwork(idName string) (libnetwork.Network, error)

FindNetwork function finds a network for a given string that can represent network name or id

func (*Daemon) Get 

func (daemon *Daemon) Get(prefixOrName string) (*Container, error)

Get looks for a container using the provided information, which could be one of the following inputs from the caller:

  • A full container ID, which will exact match a container in daemon's list
  • A container name, which will only exact match via the GetByName() function
  • A partial container ID prefix (e.g. short ID) of any length that is unique enough to only return a single container object If none of these searches succeed, an error is returned

func (*Daemon) GetByName 

func (daemon *Daemon) GetByName(name string) (*Container, error)

GetByName returns a container given a name.

func (*Daemon) GetEventFilter 

func (daemon *Daemon) GetEventFilter(filter filters.Args) *events.Filter

GetEventFilter returns a filters.Filter for a set of filters

func (*Daemon) GetImage 

func (daemon *Daemon) GetImage(name string) (*image.Image, error)

GetImage returns pointer to an Image struct corresponding to the given name. The name can include an optional tag; otherwise the default tag will be used.

func (*Daemon) GetLabels 

func (daemon *Daemon) GetLabels(id string) map[string]string

GetLabels for a container or image id

func (*Daemon) GetNetwork 

func (daemon *Daemon) GetNetwork(idName string, by int) (libnetwork.Network, error)

GetNetwork function returns a network for a given string that represents the network and a hint to indicate if the string is an Id or Name of the network

func (*Daemon) GetNetworksByID 

func (daemon *Daemon) GetNetworksByID(partialID string) []libnetwork.Network

GetNetworksByID returns a list of networks whose ID partially matches zero or more networks

func (*Daemon) GetRemappedUIDGID 

func (daemon *Daemon) GetRemappedUIDGID() (int, int)

GetRemappedUIDGID returns the current daemon's uid and gid values if user namespaces are in use for this daemon instance. If not this function will return "real" root values of 0, 0.

func (*Daemon) GetUIDGIDMaps 

func (daemon *Daemon) GetUIDGIDMaps() ([]idtools.IDMap, []idtools.IDMap)

GetUIDGIDMaps returns the current daemon's user namespace settings for the full uid and gid maps which will be applied to containers started in this instance.

func (*Daemon) Graph 

func (daemon *Daemon) Graph() *graph.Graph

Graph returns *graph.Graph which can be using for layers graph operations.

func (*Daemon) GraphDriver 

func (daemon *Daemon) GraphDriver() graphdriver.Driver

GraphDriver returns the currently used driver for processing container layers.

func (*Daemon) ImageDelete 

func (daemon *Daemon) ImageDelete(imageRef string, force, prune bool) ([]types.ImageDelete, error)

ImageDelete deletes the image referenced by the given imageRef from this daemon. The given imageRef can be an image ID, ID prefix, or a repository reference (with an optional tag or digest, defaulting to the tag name "latest"). There is differing behavior depending on whether the given imageRef is a repository reference or not.

If the given imageRef is a repository reference then that repository reference will be removed. However, if there exists any containers which were created using the same image reference then the repository reference cannot be removed unless either there are other repository references to the same image or force is true. Following removal of the repository reference, the referenced image itself will attempt to be deleted as described below but quietly, meaning any image delete conflicts will cause the image to not be deleted and the conflict will not be reported.

There may be conflicts preventing deletion of an image and these conflicts are divided into two categories grouped by their severity:

Hard Conflict:

  • a pull or build using the image.
  • any descendent image.
  • any running container using the image.

Soft Conflict:

  • any stopped container using the image.
  • any repository tag or digest references to the image.

The image cannot be removed if there are any hard conflicts and can be removed if there are soft conflicts only if force is true.

If prune is true, ancestor images will each attempt to be deleted quietly, meaning any delete conflicts will cause the image to not be deleted and the conflict will not be reported.

FIXME: remove ImageDelete's dependency on Daemon, then move to the graph package. This would require that we no longer need the daemon to determine whether images are being used by a stopped or running container.

func (*Daemon) ImageGetCached 

func (daemon *Daemon) ImageGetCached(imgID string, config *runconfig.Config) (*image.Image, error)

ImageGetCached returns the earliest created image that is a child of the image with imgID, that had the same config when it was created. nil is returned if a child cannot be found. An error is returned if the parent image cannot be found.

func (*Daemon) ImageHistory 

func (daemon *Daemon) ImageHistory(name string) ([]*types.ImageHistory, error)

ImageHistory returns a slice of ImageHistory structures for the specified image name by walking the image lineage.

func (*Daemon) ImportImage 

func (daemon *Daemon) ImportImage(src, repo, tag, msg string, inConfig io.ReadCloser, outStream io.Writer, containerConfig *runconfig.Config) error

ImportImage imports an image, getting the archived layer data either from inConfig (if src is "-"), or from a URI specified in src. Progress output is written to outStream. Repository and tag names can optionally be given in the repo and tag arguments, respectively.

func (*Daemon) IsPaused 

func (daemon *Daemon) IsPaused(id string) bool

IsPaused returns a bool indicating if the specified container is paused.

func (*Daemon) List 

func (daemon *Daemon) List() []*Container

List returns an array of all containers registered in the daemon.

func (*Daemon) ListImages 

func (daemon *Daemon) ListImages(filterArgs, filter string, all bool) ([]*types.Image, error)

ListImages returns a filtered list of images. filterArgs is a JSON-encoded set of filter arguments which will be interpreted by pkg/parsers/filters. filter is a shell glob string applied to repository names. The argument named all controls whether all images in the graph are filtered, or just the heads.

func (*Daemon) LoadImage 

func (daemon *Daemon) LoadImage(inTar io.ReadCloser, outStream io.Writer) error

LoadImage uploads a set of images into the repository. This is the complement of ImageExport. The input stream is an uncompressed tar ball containing images and metadata.

func (*Daemon) LookupImage 

func (daemon *Daemon) LookupImage(name string) (*types.ImageInspect, error)

LookupImage looks up an image by name and returns it as an ImageInspect structure.

func (*Daemon) Mount 

func (daemon *Daemon) Mount(container *Container) error

Mount sets container.basefs (is it not set coming in? why is it unset?)

func (*Daemon) NetworkControllerEnabled 

func (daemon *Daemon) NetworkControllerEnabled() bool

NetworkControllerEnabled checks if the networking stack is enabled. This feature depends on OS primitives and it's dissabled in systems like Windows.

func (*Daemon) PullImage 

func (daemon *Daemon) PullImage(image string, tag string, imagePullConfig *graph.ImagePullConfig) error

PullImage initiates a pull operation. image is the repository name to pull, and tag may be either empty, or indicate a specific tag to pull.

func (*Daemon) PushImage 

func (daemon *Daemon) PushImage(localName string, imagePushConfig *graph.ImagePushConfig) error

PushImage initiates a push operation on the repository named localName.

func (*Daemon) Register 

func (daemon *Daemon) Register(container *Container) error

Register makes a container object usable by the daemon as <container.ID>

func (*Daemon) SearchRegistryForImages 

func (daemon *Daemon) SearchRegistryForImages(term string,
	authConfig *cliconfig.AuthConfig,
	headers map[string][]string) (*registry.SearchResults, error)

SearchRegistryForImages queries the registry for images matching term. authConfig is used to login.

func (*Daemon) Shutdown 

func (daemon *Daemon) Shutdown() error

Shutdown stops the daemon.

func (*Daemon) SubscribeToEvents 

func (daemon *Daemon) SubscribeToEvents() ([]*jsonmessage.JSONMessage, chan interface{}, func())

SubscribeToEvents returns the currently record of events, a channel to stream new events from, and a function to cancel the stream of events.

func (*Daemon) SystemInfo 

func (daemon *Daemon) SystemInfo() (*types.Info, error)

SystemInfo returns information about the host server the daemon is running on.

func (*Daemon) TagImage 

func (daemon *Daemon) TagImage(repoName, tag, imageName string, force bool) error

TagImage creates a tag in the repository reponame, pointing to the image named imageName. If force is true, an existing tag with the same name may be overwritten.

func (*Daemon) VolumeCreate 

func (daemon *Daemon) VolumeCreate(name, driverName string, opts map[string]string) (*types.Volume, error)

VolumeCreate creates a volume with the specified name, driver, and opts This is called directly from the remote API

func (*Daemon) VolumeInspect 

func (daemon *Daemon) VolumeInspect(name string) (*types.Volume, error)

VolumeInspect looks up a volume by name. An error is returned if the volume cannot be found.

func (*Daemon) VolumeRm 

func (daemon *Daemon) VolumeRm(name string) error

VolumeRm removes the volume with the given name. If the volume is referenced by a container it is not removed This is called directly from the remote API

func (*Daemon) Volumes 

func (daemon *Daemon) Volumes(filter string) ([]*types.Volume, error)

Volumes lists known volumes, using the filter to restrict the range of volumes returned.

type ExecConfig 

type ExecConfig struct {
	sync.Mutex
	ID            string
	Running       bool
	ExitCode      int
	ProcessConfig *execdriver.ProcessConfig

	OpenStdin  bool
	OpenStderr bool
	OpenStdout bool
	Container  *Container
	// contains filtered or unexported fields
}

ExecConfig holds the configurations for execs. The Daemon keeps track of both running and finished execs so that they can be examined both during and after completion.

func (*ExecConfig) StderrPipe 

func (streamConfig *ExecConfig) StderrPipe() io.ReadCloser

func (*ExecConfig) StdinPipe 

func (streamConfig *ExecConfig) StdinPipe() io.WriteCloser

func (*ExecConfig) StdoutPipe 

func (streamConfig *ExecConfig) StdoutPipe() io.ReadCloser

type History 

type History []*Container

History is a convenience type for storing a list of containers, ordered by creation date.

func (*History) Add 

func (history *History) Add(container *Container)

Add the given container to history.

func (*History) Len 

func (history *History) Len() int

func (*History) Less 

func (history *History) Less(i, j int) bool

func (*History) Swap 

func (history *History) Swap(i, j int)

type State 

type State struct {
	sync.Mutex
	// FIXME: Why do we have both paused and running if a
	// container cannot be paused and running at the same time?
	Running    bool
	Paused     bool
	Restarting bool
	OOMKilled  bool

	Dead       bool
	Pid        int
	ExitCode   int
	Error      string // contains last known error when starting the container
	StartedAt  time.Time
	FinishedAt time.Time
	// contains filtered or unexported fields
}

State holds the current container state, and has methods to get and set the state. Container has an embed, which allows all of the functions defined against State to run against Container.

func NewState 

func NewState() *State

NewState creates a default state object with a fresh channel for state changes.

func (*State) IsRunning 

func (s *State) IsRunning() bool

IsRunning returns whether the running flag is set. Used by Container to check whether a container is running.

func (*State) StateString 

func (s *State) StateString() string

StateString returns a single string to describe state

func (*State) String 

func (s *State) String() string

String returns a human-readable description of the state

func (*State) WaitStop 

func (s *State) WaitStop(timeout time.Duration) (int, error)

WaitStop waits until state is stopped. If state already stopped it returns immediately. If you want wait forever you must supply negative timeout. Returns exit code, that was passed to setStoppedLocking

Source Files

View all Source files

Directories

Path Synopsis
execdrivers
lxc
native
native/template
windows
aufs
btrfs
devmapper
graphtest
overlay
vfs
windows
zfs
Package logger defines interfaces that logger drivers implement to log messages.
 Package logger defines interfaces that logger drivers implement to log messages.
awslogs
Package awslogs provides the logdriver for forwarding container logs to Amazon CloudWatch Logs
 Package awslogs provides the logdriver for forwarding container logs to Amazon CloudWatch Logs
fluentd
Package fluentd provides the log driver for forwarding server logs to fluentd endpoints.
 Package fluentd provides the log driver for forwarding server logs to fluentd endpoints.
gelf
Package gelf provides the log driver for forwarding server logs to endpoints that support the Graylog Extended Log Format.
 Package gelf provides the log driver for forwarding server logs to endpoints that support the Graylog Extended Log Format.
journald
Package journald provides the log driver for forwarding server logs to endpoints that receive the systemd format.
 Package journald provides the log driver for forwarding server logs to endpoints that receive the systemd format.
jsonfilelog
Package jsonfilelog provides the default Logger implementation for Docker logging.
 Package jsonfilelog provides the default Logger implementation for Docker logging.
loggerutils
splunk
Package splunk provides the log driver for forwarding server logs to Splunk HTTP Event Collector endpoint.
 Package splunk provides the log driver for forwarding server logs to Splunk HTTP Event Collector endpoint.
syslog
Package syslog provides the logdriver for forwarding server logs to syslog endpoints.
 Package syslog provides the logdriver for forwarding server logs to syslog endpoints.

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