worker

package
v0.0.0-...-e99be67 Latest Latest
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 Go to latest Published: May 4, 2017 License: Apache-2.0 Imports: 27 Imported by: 0

Documentation

Index

Constants

View Source 
const ImageMetadataFile = "metadata.json"
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const RawRootFSScheme = "raw"

Variables

View Source 
var (
	ErrNoWorkers     = errors.New("no workers")
	ErrMissingWorker = errors.New("worker for container is missing")
)
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var ErrBaseResourceTypeNotFound = errors.New("base-resource-type-not-found")
View Source 
var ErrCreatedVolumeNotFound = errors.New("failed-to-find-created-volume-in-baggageclaim")
View Source 
var ErrDesiredWorkerNotRunning = errors.New("desired-garden-worker-is-not-known-to-be-running")
View Source 
var ErrIncompatiblePlatform = errors.New("incompatible platform")
View Source 
var ErrMismatchedTags = errors.New("mismatched tags")
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var ErrMissingVolume = errors.New("volume mounted to container is missing")
View Source 
var ErrNoVolumeManager = errors.New("worker does not support volume management")
View Source 
var ErrNotImplemented = errors.New("Not implemented")
View Source 
var ErrTeamMismatch = errors.New("mismatched team")
View Source 
var ErrUnsupportedResourceType = errors.New("unsupported resource type")
View Source 
var ErrVolumeExpiredImmediately = errors.New("volume expired immediately after saving")

Functions

func NewHardcoded 

func NewHardcoded(
	logger lager.Logger,
	workerFactory dbng.WorkerFactory,
	clock c.Clock,
	gardenAddr string,
	baggageclaimURL string,
	resourceTypes []atc.WorkerResourceType,
) ifrit.RunFunc

Types

type ArtifactDestination 

type ArtifactDestination interface {
	// StreamIn is called with a destination directory and the tar stream to
	// expand into the destination directory.
	StreamIn(string, io.Reader) error
}

Destination is the inverse of Source. This interface allows the receiving end to determine the location of the data, e.g. based on a task's input configuration.

type ArtifactName 

type ArtifactName string

ArtifactName is just a string, with its own type to make interfaces using it more self-documenting.

type ArtifactRepository 

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

ArtifactRepository is the mapping from a ArtifactName to an ArtifactSource. Steps will both populate this map with new artifacts (e.g. the resource fetched by a Get step), and look up required artifacts (e.g. the inputs configured for a Task step).

There is only one ArtifactRepository for the duration of a build plan's execution.

ArtifactRepository is, itself, an ArtifactSource. As an ArtifactSource it acts as the set of all ArtifactSources it contains, as if they were each in subdirectories corresponding to their ArtifactName.

func NewArtifactRepository 

func NewArtifactRepository() *ArtifactRepository

NewArtifactRepository constructs a new repository.

func (*ArtifactRepository) AsMap 

func (repo *ArtifactRepository) AsMap() map[ArtifactName]ArtifactSource

AsMap extracts the current contents of the ArtifactRepository into a new map and returns it. Changes to the returned map or the ArtifactRepository will not affect each other.

func (*ArtifactRepository) RegisterSource 

func (repo *ArtifactRepository) RegisterSource(name ArtifactName, source ArtifactSource)

RegisterSource inserts an ArtifactSource into the map under the given ArtifactName. Producers of artifacts, e.g. the Get step and the Task step, will call this after they've successfully produced their artifact(s).

func (*ArtifactRepository) ScopedTo 

func (repo *ArtifactRepository) ScopedTo(names ...ArtifactName) (*ArtifactRepository, error)

ScopedTo returns a new ArtifactRepository restricted to the given set of ArtifactNames. This is used by the Put step to stream in the sources that did not have a volume available on its destination.

func (*ArtifactRepository) SourceFor 

func (repo *ArtifactRepository) SourceFor(name ArtifactName) (ArtifactSource, bool)

SourceFor looks up an Source for the given ArtifactName. Consumers of artifacts, e.g. the Task step, will call this to locate their dependencies.

func (*ArtifactRepository) StreamFile 

func (repo *ArtifactRepository) StreamFile(path string) (io.ReadCloser, error)

StreamFile streams a single file out of the repository, using the first path segment to determine the ArtifactSource to stream out of. For example, StreamFile("a/b.yml") will look up the "a" ArtifactSource and return the result of StreamFile("b.yml") on it.

If the ArtifactSource determined by the path is not present, FileNotFoundError will be returned.

func (*ArtifactRepository) StreamTo 

func (repo *ArtifactRepository) StreamTo(dest ArtifactDestination) error

StreamTo will stream all currently registered artifacts to the destination. This is used by the Put step, which currently does not have an explicit set of dependencies, and instead just pulls in everything.

Each ArtifactSource will be streamed to a subdirectory matching its ArtifactName.

func (*ArtifactRepository) VolumeOn 

func (repo *ArtifactRepository) VolumeOn(worker Worker) (Volume, bool, error)

VolumeOn returns nothing, as it's impossible for there to be a single volume representing all ArtifactSources.

type ArtifactSource 

type ArtifactSource interface {
	// StreamTo copies the data from the source to the destination. Note that
	// this potentially uses a lot of network transfer, for larger artifacts, as
	// the ATC will effectively act as a middleman.
	StreamTo(ArtifactDestination) error

	// StreamFile returns the contents of a single file in the artifact source.
	// This is used for loading a task's configuration at runtime.
	//
	// If the file cannot be found, FileNotFoundError should be returned.
	StreamFile(path string) (io.ReadCloser, error)

	// VolumeOn attempts to locate a volume equivalent to this source on the
	// given worker. If a volume can be found, it will be used directly. If not,
	// `StreamTo` will be used to copy the data to the destination instead.
	VolumeOn(Worker) (Volume, bool, error)
}

Source represents data produced by the steps, that can be transferred to other steps.

type Client 

type Client interface {
	FindOrCreateBuildContainer(
		lager.Logger,
		<-chan os.Signal,
		ImageFetchingDelegate,
		int,
		atc.PlanID,
		dbng.ContainerMetadata,
		ContainerSpec,
		atc.VersionedResourceTypes,
	) (Container, error)

	CreateResourceGetContainer(
		logger lager.Logger,
		resourceUser dbng.ResourceUser,
		cancel <-chan os.Signal,
		delegate ImageFetchingDelegate,
		metadata dbng.ContainerMetadata,
		spec ContainerSpec,
		resourceTypes atc.VersionedResourceTypes,
		resourceType string,
		version atc.Version,
		source atc.Source,
		params atc.Params,
	) (Container, error)

	FindOrCreateResourceCheckContainer(
		logger lager.Logger,
		resourceUser dbng.ResourceUser,
		cancel <-chan os.Signal,
		delegate ImageFetchingDelegate,
		metadata dbng.ContainerMetadata,
		spec ContainerSpec,
		resourceTypes atc.VersionedResourceTypes,
		resourceType string,
		source atc.Source,
	) (Container, error)

	CreateVolumeForResourceCache(
		logger lager.Logger,
		vs VolumeSpec,
		resourceCache *dbng.UsedResourceCache,
	) (Volume, error)

	FindInitializedVolumeForResourceCache(
		logger lager.Logger,
		resourceCache *dbng.UsedResourceCache,
	) (Volume, bool, error)

	FindContainerByHandle(lager.Logger, int, string) (Container, bool, error)
	FindResourceTypeByPath(path string) (atc.WorkerResourceType, bool)
	LookupVolume(lager.Logger, string) (Volume, bool, error)

	Satisfying(WorkerSpec, atc.VersionedResourceTypes) (Worker, error)
	AllSatisfying(WorkerSpec, atc.VersionedResourceTypes) ([]Worker, error)
	RunningWorkers() ([]Worker, error)
	GetWorker(workerName string) (Worker, error)
}

func NewPool 

func NewPool(provider WorkerProvider) Client

type Container 

type Container interface {
	garden.Container

	Destroy() error

	VolumeMounts() []VolumeMount

	WorkerName() string

	MarkAsHijacked() error
}

type ContainerProvider 

type ContainerProvider interface {
	FindCreatedContainerByHandle(
		logger lager.Logger,
		handle string,
		teamID int,
	) (Container, bool, error)

	FindOrCreateBuildContainer(
		logger lager.Logger,
		cancel <-chan os.Signal,
		delegate ImageFetchingDelegate,
		buildID int,
		planID atc.PlanID,
		metadata dbng.ContainerMetadata,
		spec ContainerSpec,
		resourceTypes atc.VersionedResourceTypes,
	) (Container, error)

	FindOrCreateResourceCheckContainer(
		logger lager.Logger,
		resourceUser dbng.ResourceUser,
		cancel <-chan os.Signal,
		delegate ImageFetchingDelegate,
		metadata dbng.ContainerMetadata,
		spec ContainerSpec,
		resourceTypes atc.VersionedResourceTypes,
		resourceType string,
		source atc.Source,
	) (Container, error)

	CreateResourceGetContainer(
		logger lager.Logger,
		resourceUser dbng.ResourceUser,
		cancel <-chan os.Signal,
		delegate ImageFetchingDelegate,
		metadata dbng.ContainerMetadata,
		spec ContainerSpec,
		resourceTypes atc.VersionedResourceTypes,
		resourceTypeName string,
		version atc.Version,
		source atc.Source,
		params atc.Params,
	) (Container, error)
}

type ContainerProviderFactory 

type ContainerProviderFactory interface {
	ContainerProviderFor(Worker) ContainerProvider
}

func NewContainerProviderFactory 

func NewContainerProviderFactory(
	gardenClient garden.Client,
	baggageclaimClient baggageclaim.Client,
	volumeClient VolumeClient,
	imageFactory ImageFactory,
	dbVolumeFactory dbng.VolumeFactory,
	dbResourceCacheFactory dbng.ResourceCacheFactory,
	dbResourceConfigFactory dbng.ResourceConfigFactory,
	dbTeamFactory dbng.TeamFactory,
	lockDB LockDB,
	httpProxyURL string,
	httpsProxyURL string,
	noProxy string,
	clock clock.Clock,
) ContainerProviderFactory

type ContainerSpec 

type ContainerSpec struct {
	Platform  string
	Tags      []string
	TeamID    int
	ImageSpec ImageSpec
	Env       []string

	// Working directory for processes run in the container.
	Dir string

	// Inputs to provide to the container. Inputs with a volume local to the
	// selected worker will be made available via a COW volume; others will be
	// streamed.
	Inputs []InputSource

	// Outputs for which volumes should be created and mounted into the container.
	Outputs OutputPaths

	// A pre-created resource cache volume to be mounted into the container.
	ResourceCache *VolumeMount

	// Optional user to run processes as. Overwrites the one specified in the docker image.
	User string
}

func (ContainerSpec) WorkerSpec 

func (spec ContainerSpec) WorkerSpec() WorkerSpec

type FetchedImage 

type FetchedImage struct {
	Metadata ImageMetadata
	Version  atc.Version
	URL      string
}

type FileNotFoundError 

type FileNotFoundError struct {
	Path string
}

FileNotFoundError is the error to return from StreamFile when the given path does not exist.

func (FileNotFoundError) Error 

func (err FileNotFoundError) Error() string

Error prints a helpful message including the file path. The user will see this message if e.g. their task config path does not exist.

type GardenConnectionFactory 

type GardenConnectionFactory interface {
	BuildConnection() gconn.Connection
}

func NewGardenConnectionFactory 

func NewGardenConnectionFactory(
	db transport.TransportDB,
	logger lager.Logger,
	workerName string,
	workerHost *string,
	retryBackOffFactory retryhttp.BackOffFactory,
) GardenConnectionFactory

type HostRootFSStrategy 

type HostRootFSStrategy struct {
	Path       string
	WorkerName string
	Version    *string
}

type Image 

type Image interface {
	FetchForContainer(
		logger lager.Logger,
		container dbng.CreatingContainer,
	) (FetchedImage, error)
}

type ImageFactory 

type ImageFactory interface {
	GetImage(
		logger lager.Logger,
		workerClient Worker,
		volumeClient VolumeClient,
		imageSpec ImageSpec,
		teamID int,
		signals <-chan os.Signal,
		delegate ImageFetchingDelegate,
		resourceUser dbng.ResourceUser,
		resourceTypes atc.VersionedResourceTypes,
	) (Image, error)
}

type ImageFetchingDelegate 

type ImageFetchingDelegate interface {
	Stderr() io.Writer
	ImageVersionDetermined(ResourceCacheIdentifier) error
}

type ImageMetadata 

type ImageMetadata struct {
	Env  []string `json:"env"`
	User string   `json:"user"`
}

type ImageSpec 

type ImageSpec struct {
	ResourceType        string
	ImageURL            string
	ImageResource       *atc.ImageResource
	ImageArtifactSource ArtifactSource
	ImageArtifactName   ArtifactName
	Privileged          bool
}

type InputSource 

type InputSource interface {
	Name() ArtifactName
	Source() ArtifactSource
	DestinationPath() string
}

type LockDB 

type LockDB interface {
	AcquireVolumeCreatingLock(lager.Logger, int) (lock.Lock, bool, error)
	AcquireContainerCreatingLock(lager.Logger, int) (lock.Lock, bool, error)
}

type MalformedMetadataError 

type MalformedMetadataError struct {
	UnmarshalError error
}

func (MalformedMetadataError) Error 

func (err MalformedMetadataError) Error() string

type NoCompatibleWorkersError 

type NoCompatibleWorkersError struct {
	Spec    WorkerSpec
	Workers []Worker
}

func (NoCompatibleWorkersError) Error 

func (err NoCompatibleWorkersError) Error() string

type NoopImageFetchingDelegate 

type NoopImageFetchingDelegate struct{}

func (NoopImageFetchingDelegate) ImageVersionDetermined 

func (NoopImageFetchingDelegate) ImageVersionDetermined(ResourceCacheIdentifier) error

func (NoopImageFetchingDelegate) Stderr 

func (NoopImageFetchingDelegate) Stderr() io.Writer

type OutputPaths 

type OutputPaths map[string]string

OutputPaths is a mapping from output name to its path in the container.

type ResourceCacheIdentifier 

type ResourceCacheIdentifier db.ResourceCacheIdentifier

type RetryableConnection 

type RetryableConnection struct {
	gconn.Connection
}

func NewRetryableConnection 

func NewRetryableConnection(connection gconn.Connection) *RetryableConnection

func (*RetryableConnection) Attach 

func (conn *RetryableConnection) Attach(handle string, processID string, processIO garden.ProcessIO) (garden.Process, error)

func (*RetryableConnection) Run 

func (conn *RetryableConnection) Run(handle string, processSpec garden.ProcessSpec, processIO garden.ProcessIO) (garden.Process, error)

type Sleeper 

type Sleeper interface {
	Sleep(time.Duration)
}

type Volume 

type Volume interface {
	Handle() string
	Path() string

	SetProperty(key string, value string) error
	Properties() (baggageclaim.VolumeProperties, error)

	StreamIn(path string, tarStream io.Reader) error
	StreamOut(path string) (io.ReadCloser, error)

	COWStrategy() baggageclaim.COWStrategy

	IsInitialized() (bool, error)
	Initialize() error

	CreateChildForContainer(dbng.CreatingContainer, string) (dbng.CreatingVolume, error)

	Destroy() error
}

func NewVolume 

func NewVolume(
	bcVolume baggageclaim.Volume,
	dbVolume dbng.CreatedVolume,
) Volume

type VolumeClient 

type VolumeClient interface {
	CreateVolumeForResourceCache(
		lager.Logger,
		VolumeSpec,
		*dbng.UsedResourceCache,
	) (Volume, error)
	FindOrCreateVolumeForContainer(
		lager.Logger,
		VolumeSpec,
		dbng.CreatingContainer,
		int,
		string,
	) (Volume, error)
	FindOrCreateCOWVolumeForContainer(
		lager.Logger,
		VolumeSpec,
		dbng.CreatingContainer,
		Volume,
		int,
		string,
	) (Volume, error)
	FindOrCreateVolumeForBaseResourceType(
		lager.Logger,
		VolumeSpec,
		int,
		string,
	) (Volume, error)
	FindInitializedVolumeForResourceCache(
		lager.Logger,
		*dbng.UsedResourceCache,
	) (Volume, bool, error)
	LookupVolume(lager.Logger, string) (Volume, bool, error)
}

func NewVolumeClient 

func NewVolumeClient(
	baggageclaimClient baggageclaim.Client,
	lockDB LockDB,
	dbVolumeFactory dbng.VolumeFactory,
	dbWorkerBaseResourceTypeFactory dbng.WorkerBaseResourceTypeFactory,
	clock clock.Clock,
	dbWorker dbng.Worker,
) VolumeClient

type VolumeMount 

type VolumeMount struct {
	Volume    Volume
	MountPath string
}

type VolumeProperties 

type VolumeProperties map[string]string

type VolumeSpec 

type VolumeSpec struct {
	Strategy   baggageclaim.Strategy
	Properties VolumeProperties
	Privileged bool
	TTL        time.Duration
}

type Worker 

type Worker interface {
	Client

	ActiveContainers() int

	Description() string
	Name() string
	ResourceTypes() []atc.WorkerResourceType
	Tags() atc.Tags
	Uptime() time.Duration
	IsOwnedByTeam() bool
}

func NewGardenWorker 

func NewGardenWorker(
	containerProviderFactory ContainerProviderFactory,
	volumeClient VolumeClient,
	lockDB LockDB,
	provider WorkerProvider,
	clock clock.Clock,
	activeContainers int,
	resourceTypes []atc.WorkerResourceType,
	platform string,
	tags atc.Tags,
	teamID int,
	name string,
	startTime int64,
) Worker

type WorkerProvider 

type WorkerProvider interface {
	RunningWorkers() ([]Worker, error)
	GetWorker(string) (Worker, bool, error)

	FindWorkerForContainer(
		logger lager.Logger,
		teamID int,
		handle string,
	) (Worker, bool, error)

	FindWorkerForResourceCheckContainer(
		logger lager.Logger,
		teamID int,
		resourceUser dbng.ResourceUser,
		resourceType string,
		resourceSource atc.Source,
		types atc.VersionedResourceTypes,
	) (Worker, bool, error)

	FindWorkerForBuildContainer(
		logger lager.Logger,
		teamID int,
		buildID int,
		planID atc.PlanID,
	) (Worker, bool, error)
}

func NewDBWorkerProvider 

func NewDBWorkerProvider(
	logger lager.Logger,
	lockDB LockDB,
	retryBackOffFactory retryhttp.BackOffFactory,
	imageFactory ImageFactory,
	dbResourceCacheFactory dbng.ResourceCacheFactory,
	dbResourceConfigFactory dbng.ResourceConfigFactory,
	dbWorkerBaseResourceTypeFactory dbng.WorkerBaseResourceTypeFactory,
	dbVolumeFactory dbng.VolumeFactory,
	dbTeamFactory dbng.TeamFactory,
	workerFactory dbng.WorkerFactory,
) WorkerProvider

type WorkerSpec 

type WorkerSpec struct {
	Platform     string
	ResourceType string
	Tags         []string
	TeamID       int
}

func (WorkerSpec) Description 

func (spec WorkerSpec) Description() string

Source Files

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Directories

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