cluster

package
v0.0.0-...-c9014b7 Latest Latest
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 Go to latest Published: May 15, 2017 License: Apache-2.0, CC-BY-SA-4.0 Imports: 34 Imported by: 0

Documentation

Index

Constants

View Source 
const SwarmLabelNamespace = "com.docker.swarm"

SwarmLabelNamespace defines the key prefix in all custom labels

Variables

This section is empty.

Functions

func ConsolidateResourceFields 

func ConsolidateResourceFields(c *OldContainerConfig)

ConsolidateResourceFields is a temporary fix to handle forward/backward compatibility between Docker <1.6 and >=1.7

func FullStateString 

func FullStateString(state *types.ContainerState) string

FullStateString returns human-readable description of the state

func IsConnectionError 

func IsConnectionError(err error) bool

IsConnectionError returns true when err is connection problem

func NewHTTPClientTimeout 

func NewHTTPClientTimeout(daemonURL string, tlsConfig *tls.Config, timeout time.Duration, setUserTimeout tcpFunc) (*http.Client, *url.URL, error)

NewHTTPClientTimeout is used to create the HTTP Client and URL

func ParseRepositoryTag 

func ParseRepositoryTag(repos string) (string, string)

ParseRepositoryTag gets a repos name and returns the right reposName + tag|digest The tag can be confusing because of a port in a repository name. 

Ex: localhost.localdomain:5000/samalba/hipache:latest
Digest ex: localhost:5000/foo/bar@sha256:bc8813ea7b3603864987522f02a76101c17ad122e1c46d790efc0fca78ca7bfb

func StateString 

func StateString(state *types.ContainerState) string

StateString returns a single string to describe state

Types

type Cluster 

type Cluster interface {
	// Create a container
	CreateContainer(config *ContainerConfig, name string, authConfig *types.AuthConfig) (*Container, error)

	// Remove a container
	RemoveContainer(container *Container, force, volumes bool) error

	// Return all images
	Images() Images

	// Return one image matching `IDOrName`
	Image(IDOrName string) *Image

	// Remove images from the cluster
	RemoveImages(name string, force bool) ([]types.ImageDelete, error)

	// Return all containers
	Containers() Containers

	// Start a container
	StartContainer(container *Container, hostConfig *dockerclient.HostConfig) error

	// Return container the matching `IDOrName`
	// TODO: remove this method from the interface as we can use
	// cluster.Containers().Get(IDOrName)
	Container(IDOrName string) *Container

	// Return all networks
	Networks() Networks

	// Create a network
	CreateNetwork(name string, request *types.NetworkCreate) (*types.NetworkCreateResponse, error)

	// Remove a network from the cluster
	RemoveNetwork(network *Network) error

	// Create a volume
	CreateVolume(request *volume.VolumesCreateBody) (*types.Volume, error)

	// Return all volumes
	Volumes() Volumes

	// Remove volumes from the cluster
	RemoveVolumes(name string) (bool, error)

	// Pull images
	// `callback` can be called multiple time
	//  `where` is where it is being pulled
	//  `status` is the current status, like "", "in progress" or "downloaded"
	Pull(name string, authConfig *types.AuthConfig, callback func(where, status string, err error))

	// Import image
	// `callback` can be called multiple time
	// `where` is where it is being imported
	// `status` is the current status, like "", "in progress" or "imported"
	Import(source string, ref string, tag string, imageReader io.Reader, callback func(where, status string, err error))

	// Load images
	// `callback` can be called multiple time
	// `what` is what is being loaded
	// `status` is the current status, like "", "in progress" or "loaded"
	Load(imageReader io.Reader, callback func(what, status string, err error))

	// Return some info about the cluster, like nb of containers / images
	// It is pretty open, so the implementation decides what to return.
	Info() [][2]string

	// Return the total memory of the cluster
	TotalMemory() int64

	// Return the number of CPUs in the cluster
	TotalCpus() int64

	// Register an event handler for cluster-wide events.
	RegisterEventHandler(h EventHandler) error

	// Unregister an event handler.
	UnregisterEventHandler(h EventHandler)

	// FIXME: remove this method
	// Return a random engine
	RANDOMENGINE() (*Engine, error)

	// Rename a container
	RenameContainer(container *Container, newName string) error

	// Build an image
	BuildImage(io.Reader, *types.ImageBuildOptions, io.Writer) error

	// Tag an image
	TagImage(IDOrName string, ref string, force bool) error

	// Scale containers and return the scale up or down containers id
	Scale(scaleConfig common.ScaleAPI) []string
	// Refresh a single cluster engine
	RefreshEngine(hostname string) error

	// Refresh all engines in the cluster
	RefreshEngines() error
}

Cluster is exported

type Container 

type Container struct {
	types.Container

	Config *ContainerConfig
	Info   types.ContainerJSON
	Engine *Engine
}

Container is exported

func (*Container) Refresh 

func (c *Container) Refresh() (*Container, error)

Refresh container

type ContainerConfig 

type ContainerConfig struct {
	container.Config
	HostConfig       container.HostConfig
	NetworkingConfig network.NetworkingConfig
}

ContainerConfig is exported TODO store affinities and constraints in their own fields

func BuildContainerConfig 

func BuildContainerConfig(c container.Config, h container.HostConfig, n network.NetworkingConfig) *ContainerConfig

BuildContainerConfig creates a cluster.ContainerConfig from a Config, HostConfig, and NetworkingConfig

func (*ContainerConfig) AddAffinity 

func (c *ContainerConfig) AddAffinity(affinity string) error

AddAffinity to config

func (*ContainerConfig) AddConstraint 

func (c *ContainerConfig) AddConstraint(constraint string) error

AddConstraint to config

func (*ContainerConfig) AddWhitelist 

func (c *ContainerConfig) AddWhitelist(whitelist string) error

AddWhitelist to config

func (*ContainerConfig) Affinities 

func (c *ContainerConfig) Affinities() []string

Affinities returns all the affinities from the ContainerConfig

func (*ContainerConfig) Constraints 

func (c *ContainerConfig) Constraints() []string

Constraints returns all the constraints from the ContainerConfig

func (*ContainerConfig) HasReschedulePolicy 

func (c *ContainerConfig) HasReschedulePolicy(p string) bool

HasReschedulePolicy returns true if the specified policy is part of the config

func (*ContainerConfig) HaveNodeConstraint 

func (c *ContainerConfig) HaveNodeConstraint() bool

HaveNodeConstraint in config

func (*ContainerConfig) RemoveAffinity 

func (c *ContainerConfig) RemoveAffinity(affinity string) error

RemoveAffinity from config

func (*ContainerConfig) RemoveWhitelist 

func (c *ContainerConfig) RemoveWhitelist(whitelist string) error

RemoveWhitelist from config

func (*ContainerConfig) SetSwarmID 

func (c *ContainerConfig) SetSwarmID(id string)

SetSwarmID sets or overrides the Swarm ID in the Config.

func (*ContainerConfig) SwarmID 

func (c *ContainerConfig) SwarmID() string

SwarmID extracts the Swarm ID from the Config. May return an empty string if not set.

func (*ContainerConfig) Validate 

func (c *ContainerConfig) Validate() error

Validate returns an error if the config isn't valid

func (*ContainerConfig) Whitelists 

func (c *ContainerConfig) Whitelists() []string

Whitelists returns all the whitelists from the ContainerConfig

type Containers 

type Containers []*Container

Containers represents a list of containers

func (Containers) Get 

func (containers Containers) Get(IDOrName string) *Container

Get returns a container using its ID or Name

type DriverOpts 

type DriverOpts []string

DriverOpts are key=values options

func (DriverOpts) Bool 

func (do DriverOpts) Bool(key, env string) (bool, bool)

Bool returns a boolean from the driver options

func (DriverOpts) Float 

func (do DriverOpts) Float(key, env string) (float64, bool)

Float returns a float64 from the driver options

func (DriverOpts) IP 

func (do DriverOpts) IP(key, env string) (net.IP, bool)

IP returns an IP address from the driver options

func (DriverOpts) Int 

func (do DriverOpts) Int(key, env string) (int64, bool)

Int returns an int64 from the driver options

func (DriverOpts) String 

func (do DriverOpts) String(key, env string) (string, bool)

String returns a string from the driver options

func (DriverOpts) Uint 

func (do DriverOpts) Uint(key, env string) (uint64, bool)

Uint returns an int64 from the driver options

type Engine 

type Engine struct {
	sync.RWMutex

	ID      string
	IP      string
	Addr    string
	Name    string
	Cpus    int64
	Memory  int64
	Labels  map[string]string
	Version string

	DeltaDuration time.Duration // swarm's systime - engine's systime
	// contains filtered or unexported fields
}

Engine represents a docker engine

func NewEngine 

func NewEngine(addr string, overcommitRatio float64, opts *EngineOpts) *Engine

NewEngine is exported

func (*Engine) AddContainer 

func (e *Engine) AddContainer(container *Container) error

AddContainer injects a container into the internal state.

func (*Engine) AddNetwork 

func (e *Engine) AddNetwork(network *Network)

AddNetwork adds a network to the internal engine state.

func (*Engine) BuildImage 

func (e *Engine) BuildImage(buildContext io.Reader, buildImage *types.ImageBuildOptions) (io.ReadCloser, error)

BuildImage builds an image

func (*Engine) CheckConnectionErr 

func (e *Engine) CheckConnectionErr(err error)

CheckConnectionErr checks error from client response and adjusts engine healthy indicators

func (*Engine) Connect 

func (e *Engine) Connect(config *tls.Config) error

Connect will initialize a connection to the Docker daemon running on the host, gather machine specs (memory, cpu, ...) and monitor state changes.

func (*Engine) ConnectWithClient 

func (e *Engine) ConnectWithClient(client dockerclient.Client, apiClient swarmclient.SwarmAPIClient) error

ConnectWithClient is exported

func (*Engine) Containers 

func (e *Engine) Containers() Containers

Containers returns all the containers in the engine.

func (*Engine) CreateContainer 

func (e *Engine) CreateContainer(config *ContainerConfig, name string, pullImage bool, authConfig *types.AuthConfig) (*Container, error)

CreateContainer creates a new container

func (*Engine) CreateNetwork 

func (e *Engine) CreateNetwork(name string, request *types.NetworkCreate) (*types.NetworkCreateResponse, error)

CreateNetwork creates a network in the engine

func (*Engine) CreateVolume 

func (e *Engine) CreateVolume(request *volume.VolumesCreateBody) (*types.Volume, error)

CreateVolume creates a volume in the engine

func (*Engine) DeleteNetwork 

func (e *Engine) DeleteNetwork(network *Network)

DeleteNetwork deletes a network from the internal engine state.

func (*Engine) Disconnect 

func (e *Engine) Disconnect()

Disconnect will stop all monitoring of the engine. The Engine object cannot be further used without reconnecting it first.

func (*Engine) ErrMsg 

func (e *Engine) ErrMsg() string

ErrMsg returns error message for the engine

func (*Engine) HTTPClientAndScheme 

func (e *Engine) HTTPClientAndScheme() (*http.Client, string, error)

HTTPClientAndScheme returns the underlying HTTPClient and the scheme used by the engine

func (*Engine) HandleIDConflict 

func (e *Engine) HandleIDConflict(otherAddr string)

HandleIDConflict handles ID duplicate with existing engine

func (*Engine) HealthIndicator 

func (e *Engine) HealthIndicator() int64

HealthIndicator returns degree of healthiness between 0 and 100. 0 means node is not healthy (unhealthy, pending), 100 means last connectivity was successful other values indicate recent failures but haven't moved engine out of healthy state

func (*Engine) Image 

func (e *Engine) Image(IDOrName string) *Image

Image returns the image with IDOrName in the engine

func (*Engine) Images 

func (e *Engine) Images() Images

Images returns all the images in the engine

func (*Engine) Import 

func (e *Engine) Import(source string, ref string, tag string, imageReader io.Reader) error

Import image

func (*Engine) IsHealthy 

func (e *Engine) IsHealthy() bool

IsHealthy returns true if the engine is healthy

func (*Engine) Load 

func (e *Engine) Load(reader io.Reader) error

Load an image on the engine

func (*Engine) NetworkDisconnect 

func (e *Engine) NetworkDisconnect(container *Container, network *Network, force bool) error

NetworkDisconnect disconnects a container from a network

func (*Engine) Networks 

func (e *Engine) Networks() Networks

Networks returns all the networks in the engine

func (*Engine) Pull 

func (e *Engine) Pull(image string, authConfig *types.AuthConfig) error

Pull an image on the engine

func (*Engine) RefreshContainers 

func (e *Engine) RefreshContainers(full bool) error

RefreshContainers will refresh the list and status of containers running on the engine. If `full` is true, each container will be inspected. FIXME: unexport this method after mesos scheduler stops using it directly

func (*Engine) RefreshEngine 

func (e *Engine) RefreshEngine(hostname string) error

func (*Engine) RefreshImages 

func (e *Engine) RefreshImages() error

RefreshImages refreshes the list of images on the engine.

func (*Engine) RefreshNetworks 

func (e *Engine) RefreshNetworks() error

RefreshNetworks refreshes the list of networks on the engine.

func (*Engine) RefreshVolumes 

func (e *Engine) RefreshVolumes() error

RefreshVolumes refreshes the list of volumes on the engine.

func (*Engine) RegisterEventHandler 

func (e *Engine) RegisterEventHandler(h EventHandler) error

RegisterEventHandler registers an event handler.

func (*Engine) RemoveContainer 

func (e *Engine) RemoveContainer(container *Container, force, volumes bool) error

RemoveContainer removes a container from the engine.

func (*Engine) RemoveImage 

func (e *Engine) RemoveImage(name string, force bool) ([]types.ImageDelete, error)

RemoveImage deletes an image from the engine.

func (*Engine) RemoveNetwork 

func (e *Engine) RemoveNetwork(network *Network) error

RemoveNetwork removes a network from the engine.

func (*Engine) RemoveVolume 

func (e *Engine) RemoveVolume(name string) error

RemoveVolume deletes a volume from the engine.

func (*Engine) RenameContainer 

func (e *Engine) RenameContainer(container *Container, newName string) error

RenameContainer renames a container

func (*Engine) StartContainer 

func (e *Engine) StartContainer(id string, hostConfig *dockerclient.HostConfig) error

StartContainer starts a container

func (*Engine) StartMonitorEvents 

func (e *Engine) StartMonitorEvents()

StartMonitorEvents monitors events from the engine

func (*Engine) Status 

func (e *Engine) Status() string

Status returns the health status of the Engine: Healthy or Unhealthy

func (*Engine) String 

func (e *Engine) String() string

func (*Engine) TagImage 

func (e *Engine) TagImage(IDOrName string, ref string, force bool) error

TagImage tags an image

func (*Engine) TimeToValidate 

func (e *Engine) TimeToValidate() bool

TimeToValidate returns true if a pending node is up for validation

func (*Engine) TotalCpus 

func (e *Engine) TotalCpus() int64

TotalCpus returns the total cpus + overcommit

func (*Engine) TotalMemory 

func (e *Engine) TotalMemory() int64

TotalMemory returns the total memory + overcommit

func (*Engine) UpdatedAt 

func (e *Engine) UpdatedAt() time.Time

UpdatedAt returns the previous updatedAt time

func (*Engine) UsedCpus 

func (e *Engine) UsedCpus() int64

UsedCpus returns the sum of CPUs reserved by containers.

func (*Engine) UsedMemory 

func (e *Engine) UsedMemory() int64

UsedMemory returns the sum of memory reserved by containers.

func (*Engine) ValidationComplete 

func (e *Engine) ValidationComplete()

ValidationComplete transitions engine state from statePending to stateHealthy

func (*Engine) Volumes 

func (e *Engine) Volumes() Volumes

Volumes returns all the volumes in the engine

type EngineOpts 

type EngineOpts struct {
	RefreshMinInterval time.Duration
	RefreshMaxInterval time.Duration
	FailureRetry       int
}

EngineOpts represents the options for an engine

type EngineSorter 

type EngineSorter []*Engine

EngineSorter implements the Sort interface to sort Cluster.Engine. It is not guaranteed to be a stable sort.

func (EngineSorter) Len 

func (s EngineSorter) Len() int

Len returns the number of engines to be sorted.

func (EngineSorter) Less 

func (s EngineSorter) Less(i, j int) bool

Less reports whether the engine with index i should sort before the engine with index j. Engines are sorted chronologically by name.

func (EngineSorter) Swap 

func (s EngineSorter) Swap(i, j int)

Swap exchanges the engine elements with indices i and j.

type Event 

type Event struct {
	events.Message
	Engine *Engine `json:"-"`
}

Event is exported

type EventHandler 

type EventHandler interface {
	Handle(*Event) error
}

EventHandler is exported

type EventHandlers 

type EventHandlers struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

EventHandlers is a map of EventHandler

func NewEventHandlers 

func NewEventHandlers() *EventHandlers

NewEventHandlers returns an EventHandlers

func (*EventHandlers) Handle 

func (eh *EventHandlers) Handle(e *Event)

Handle callbacks for the events

func (*EventHandlers) RegisterEventHandler 

func (eh *EventHandlers) RegisterEventHandler(h EventHandler) error

RegisterEventHandler registers an event handler.

func (*EventHandlers) UnregisterEventHandler 

func (eh *EventHandlers) UnregisterEventHandler(h EventHandler)

UnregisterEventHandler unregisters a previously registered event handler.

type EventsMonitor 

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

EventsMonitor monitors events

func NewEventsMonitor 

func NewEventsMonitor(cli swarmclient.SwarmAPIClient, handler func(msg events.Message) error) *EventsMonitor

NewEventsMonitor returns an EventsMonitor

func (*EventsMonitor) Start 

func (em *EventsMonitor) Start(ec chan error)

Start starts the EventsMonitor

func (*EventsMonitor) Stop 

func (em *EventsMonitor) Stop()

Stop stops the EventsMonitor

type Image 

type Image struct {
	types.ImageSummary

	Engine *Engine
}

Image is exported

func (*Image) Match 

func (image *Image) Match(IDOrName string, matchTag bool) bool

Match is exported

type ImageFilterOptions 

type ImageFilterOptions struct {
	types.ImageListOptions
}

ImageFilterOptions is the set of filtering options supported by Images.Filter()

type Images 

type Images []*Image

Images is a collection of Image objects that can be filtered

func (Images) Filter 

func (images Images) Filter(opts ImageFilterOptions) Images

Filter returns a new sequence of Images filtered to only the images that matched the filtering parameters

type Network 

type Network struct {
	types.NetworkResource

	Engine *Engine
}

Network is exported

func (*Network) RemoveDuplicateEndpoints 

func (network *Network) RemoveDuplicateEndpoints() *Network

RemoveDuplicateEndpoints returns a copy of input network where duplicate container endpoints in the network are removed. See https://github.com/docker/swarm/issues/1969 This function should be disabled when the bug is fixed in Docker network

type Networks 

type Networks []*Network

Networks represents an array of networks

func (Networks) Filter 

func (networks Networks) Filter(filter filters.Args) Networks

Filter returns networks filtered by names, IDs, labels, etc.

func (Networks) Get 

func (networks Networks) Get(IDOrName string) *Network

Get returns a network using its ID or Name

func (Networks) Uniq 

func (networks Networks) Uniq() Networks

Uniq returns all uniq networks

type OldContainerConfig 

type OldContainerConfig struct {
	ContainerConfig
	Memory     int64
	MemorySwap int64
	CPUShares  int64  `json:"CpuShares"`
	CPUSet     string `json:"Cpuset"`
}

OldContainerConfig contains additional fields for backward compatibility This should be removed after we stop supporting API versions <= 1.8

type Volume 

type Volume struct {
	types.Volume

	Engine *Engine
}

Volume is exported

type Volumes 

type Volumes []*Volume

Volumes represents an array of volumes

func (Volumes) Get 

func (volumes Volumes) Get(name string) *Volume

Get returns a volume using its ID or Name

type Watchdog 

type Watchdog struct {
	sync.Mutex
	// contains filtered or unexported fields
}

Watchdog listens to cluster events and handles container rescheduling

func NewWatchdog 

func NewWatchdog(cluster Cluster) *Watchdog

NewWatchdog creates a new watchdog

func (*Watchdog) Handle 

func (w *Watchdog) Handle(e *Event) error

Handle handles cluster callbacks

Source Files

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