engine

package
v1.14.0 Latest Latest
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 Go to latest Published: Jan 18, 2017 License: Apache-2.0, BSD-2-Clause, BSD-3-Clause, + 4 more Imports: 31 Imported by: 0

Documentation

Overview

Package engine contains code for interacting with container-running backends and handling events from them. It supports Docker as the sole task engine type.

Package engine contains the core logic for managing tasks

Index

Constants

View Source 
const (
	//DockerEndpointEnvVariable is the environment variable that can override the Docker endpoint
	DockerEndpointEnvVariable = "DOCKER_HOST"
	// DockerDefaultEndpoint is the default value for the Docker endpoint
	DockerDefaultEndpoint = "unix:///var/run/docker.sock"
)
View Source 
const (
	// ListContainersTimeout is the timeout for the ListContainers API.
	ListContainersTimeout = 10 * time.Minute
)

Timelimits for docker operations enforced above docker

Variables

View Source 
var ImagePullDeleteLock sync.RWMutex

ImagePullDeleteLock ensures that pulls and deletes do not run at the same time and pulls can be run at the same time for docker >= 1.11.1 Pulls are serialized as a temporary workaround for a devicemapper issue. (see https://github.com/docker/docker/issues/9718) Deletes must not run at the same time as pulls to prevent deletion of images that are being used to launch new tasks.

Functions

This section is empty.

Types

type CannotCreateContainerError added in v1.14.0 

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

CannotCreateContainerError indicates any error when trying to create a container

func (CannotCreateContainerError) Error added in v1.14.0 

func (err CannotCreateContainerError) Error() string

func (CannotCreateContainerError) ErrorName added in v1.14.0 

func (err CannotCreateContainerError) ErrorName() string

type CannotDescribeContainerError added in v1.14.0 

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

CannotDescribeContainerError indicates any error when trying to describe a container

func (CannotDescribeContainerError) Error added in v1.14.0 

func (err CannotDescribeContainerError) Error() string

func (CannotDescribeContainerError) ErrorName added in v1.14.0 

func (err CannotDescribeContainerError) ErrorName() string

type CannotGetDockerClientError added in v1.5.0 

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

CannotGetDockerClientError is a type for failing to get a specific Docker client

func (CannotGetDockerClientError) Error added in v1.5.0 

func (c CannotGetDockerClientError) Error() string

func (CannotGetDockerClientError) ErrorName added in v1.5.0 

func (CannotGetDockerClientError) ErrorName() string

ErrorName returns the name of the error

type CannotInspectContainerError added in v1.14.0 

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

CannotInspectContainerError indicates any error when trying to inspect a container

func (CannotInspectContainerError) Error added in v1.14.0 

func (err CannotInspectContainerError) Error() string

func (CannotInspectContainerError) ErrorName added in v1.14.0 

func (err CannotInspectContainerError) ErrorName() string

type CannotListContainersError added in v1.14.0 

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

CannotListContainersError indicates any error when trying to list containers

func (CannotListContainersError) Error added in v1.14.0 

func (err CannotListContainersError) Error() string

func (CannotListContainersError) ErrorName added in v1.14.0 

func (err CannotListContainersError) ErrorName() string

type CannotPullContainerError added in v1.14.0 

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

CannotPullContainerError indicates any error when trying to pull a container image

func (CannotPullContainerError) Error added in v1.14.0 

func (err CannotPullContainerError) Error() string

func (CannotPullContainerError) ErrorName added in v1.14.0 

func (err CannotPullContainerError) ErrorName() string

type CannotPullECRContainerError added in v1.14.0 

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

CannotPullECRContainerError indicates any error when trying to pull a container image from ECR

func (CannotPullECRContainerError) Error added in v1.14.0 

func (err CannotPullECRContainerError) Error() string

func (CannotPullECRContainerError) ErrorName added in v1.14.0 

func (err CannotPullECRContainerError) ErrorName() string

type CannotRemoveContainerError added in v1.14.0 

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

CannotRemoveContainerError indicates any error when trying to remove a container

func (CannotRemoveContainerError) Error added in v1.14.0 

func (err CannotRemoveContainerError) Error() string

func (CannotRemoveContainerError) ErrorName added in v1.14.0 

func (err CannotRemoveContainerError) ErrorName() string

type CannotStartContainerError added in v1.14.0 

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

CannotStartContainerError indicates any error when trying to start a container

func (CannotStartContainerError) Error added in v1.14.0 

func (err CannotStartContainerError) Error() string

func (CannotStartContainerError) ErrorName added in v1.14.0 

func (err CannotStartContainerError) ErrorName() string

type CannotStopContainerError added in v1.14.0 

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

CannotStopContainerError indicates any error when trying to stop a container

func (CannotStopContainerError) Error added in v1.14.0 

func (err CannotStopContainerError) Error() string

func (CannotStopContainerError) ErrorName added in v1.14.0 

func (err CannotStopContainerError) ErrorName() string

func (CannotStopContainerError) IsUnretriableError added in v1.14.0 

func (err CannotStopContainerError) IsUnretriableError() bool

type ContainerNotFound 

type ContainerNotFound struct {
	TaskArn       string
	ContainerName string
}

ContainerNotFound is a type for a missing container

func (ContainerNotFound) Error 

func (cnferror ContainerNotFound) Error() string

type ContainerVanishedError added in v1.1.0 

type ContainerVanishedError struct{}

ContainerVanishedError is a type for describing a container that does not exist

func (ContainerVanishedError) Error added in v1.1.0 

func (err ContainerVanishedError) Error() string

func (ContainerVanishedError) ErrorName added in v1.1.0 

func (err ContainerVanishedError) ErrorName() string

ErrorName returns the name of the error

type DockerClient 

type DockerClient interface {
	// SupportedVersions returns a slice of the supported docker versions (or at least supposedly supported).
	SupportedVersions() []dockerclient.DockerVersion
	// WithVersion returns a new DockerClient for which all operations will use the given remote api version.
	// A default version will be used for a client not produced via this method.
	WithVersion(dockerclient.DockerVersion) DockerClient
	ContainerEvents(ctx context.Context) (<-chan DockerContainerChangeEvent, error)

	PullImage(image string, authData *api.RegistryAuthenticationData) DockerContainerMetadata

	CreateContainer(*docker.Config, *docker.HostConfig, string, time.Duration) DockerContainerMetadata
	StartContainer(string, time.Duration) DockerContainerMetadata
	StopContainer(string, time.Duration) DockerContainerMetadata
	DescribeContainer(string) (api.ContainerStatus, DockerContainerMetadata)
	RemoveContainer(string, time.Duration) error

	InspectContainer(string, time.Duration) (*docker.Container, error)
	ListContainers(bool, time.Duration) ListContainersResponse
	Stats(string, context.Context) (<-chan *docker.Stats, error)

	Version() (string, error)
	InspectImage(string) (*docker.Image, error)
	RemoveImage(string, time.Duration) error
}

DockerClient interface to make testing it easier

func NewDockerGoClient 

func NewDockerGoClient(clientFactory dockerclient.Factory, acceptInsecureCert bool, cfg *config.Config) (DockerClient, error)

NewDockerGoClient creates a new DockerGoClient

type DockerContainerChangeEvent 

type DockerContainerChangeEvent struct {
	Status api.ContainerStatus

	DockerContainerMetadata
}

DockerContainerChangeEvent is a type for container change events

type DockerContainerMetadata added in v1.1.0 

type DockerContainerMetadata struct {
	DockerID     string
	ExitCode     *int
	PortBindings []api.PortBinding
	Error        engineError
	Volumes      map[string]string
}

DockerContainerMetadata is a type for metadata about Docker containers

type DockerStateError added in v1.1.0 

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

DockerStateError is a wrapper around the error docker puts in the '.State.Error' field of its inspect output.

func NewDockerStateError added in v1.1.0 

func NewDockerStateError(err string) DockerStateError

NewDockerStateError creates a DockerStateError

func (DockerStateError) Error added in v1.1.0 

func (err DockerStateError) Error() string

func (DockerStateError) ErrorName added in v1.1.0 

func (err DockerStateError) ErrorName() string

ErrorName returns the name of the error

type DockerTaskEngine 

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

DockerTaskEngine is an abstraction over the DockerGoClient so that it does not have to know about tasks, only containers The DockerTaskEngine interacts with docker to implement a task engine

func NewDockerTaskEngine 

func NewDockerTaskEngine(cfg *config.Config, client DockerClient, credentialsManager credentials.Manager, containerChangeEventStream *eventstream.EventStream, imageManager ImageManager, state *dockerstate.DockerTaskEngineState) *DockerTaskEngine

NewDockerTaskEngine returns a created, but uninitialized, DockerTaskEngine. The distinction between created and initialized is that when created it may be serialized/deserialized, but it will not communicate with docker until it is also initialized.

func (*DockerTaskEngine) AddTask 

func (engine *DockerTaskEngine) AddTask(task *api.Task) error

AddTask starts tracking a task

func (*DockerTaskEngine) Capabilities added in v1.5.0 

func (engine *DockerTaskEngine) Capabilities() []string

Capabilities returns the supported capabilities of this agent / docker-client pair. Currently, the following capabilities are possible: 

com.amazonaws.ecs.capability.privileged-container
com.amazonaws.ecs.capability.docker-remote-api.1.17
com.amazonaws.ecs.capability.docker-remote-api.1.18
com.amazonaws.ecs.capability.docker-remote-api.1.19
com.amazonaws.ecs.capability.docker-remote-api.1.20
com.amazonaws.ecs.capability.logging-driver.json-file
com.amazonaws.ecs.capability.logging-driver.syslog
com.amazonaws.ecs.capability.logging-driver.fluentd
com.amazonaws.ecs.capability.logging-driver.journald
com.amazonaws.ecs.capability.logging-driver.gelf
com.amazonaws.ecs.capability.selinux
com.amazonaws.ecs.capability.apparmor
com.amazonaws.ecs.capability.ecr-auth
com.amazonaws.ecs.capability.task-iam-role
com.amazonaws.ecs.capability.task-iam-role-network-host

func (*DockerTaskEngine) CheckTaskState added in v1.1.0 

func (engine *DockerTaskEngine) CheckTaskState(task *api.Task)

CheckTaskState inspects the state of all containers within a task and writes their state to the managed task's container channel.

func (*DockerTaskEngine) Disable added in v1.0.0 

func (engine *DockerTaskEngine) Disable()

Disable prevents this engine from managing any additional tasks.

func (*DockerTaskEngine) GetTaskByArn added in v1.8.2 

func (engine *DockerTaskEngine) GetTaskByArn(arn string) (*api.Task, bool)

GetTaskByArn returns the task identified by that ARN

func (*DockerTaskEngine) Init 

func (engine *DockerTaskEngine) Init() error

Init initializes a DockerTaskEngine such that it may communicate with docker and operate normally. This function must be called before any other function, except serializing and deserializing, can succeed without error.

func (*DockerTaskEngine) ListTasks 

func (engine *DockerTaskEngine) ListTasks() ([]*api.Task, error)

ListTasks returns the tasks currently managed by the DockerTaskEngine

func (*DockerTaskEngine) MarshalJSON 

func (engine *DockerTaskEngine) MarshalJSON() ([]byte, error)

MarshalJSON marshals into state directly

func (*DockerTaskEngine) MustInit 

func (engine *DockerTaskEngine) MustInit()

MustInit blocks and retries until an engine can be initialized.

func (*DockerTaskEngine) SetDockerClient added in v1.1.0 

func (engine *DockerTaskEngine) SetDockerClient(client DockerClient)

SetDockerClient provides a way to override the client used for communication with docker as a testing hook.

func (*DockerTaskEngine) SetSaver 

func (engine *DockerTaskEngine) SetSaver(saver statemanager.Saver)

SetSaver sets the saver that is used by the DockerTaskEngine

func (*DockerTaskEngine) Shutdown added in v1.1.0 

func (engine *DockerTaskEngine) Shutdown()

Shutdown makes a best-effort attempt to cleanup after the task engine. This should not be relied on for anything more complicated than testing.

func (*DockerTaskEngine) State 

func (engine *DockerTaskEngine) State() *dockerstate.DockerTaskEngineState

State is a function primarily meant for testing usage; it is explicitly not part of the TaskEngine interface and should not be relied upon. It returns an internal representation of the state of this DockerTaskEngine.

func (*DockerTaskEngine) TaskEvents 

func (engine *DockerTaskEngine) TaskEvents() (<-chan api.TaskStateChange, <-chan api.ContainerStateChange)

TaskEvents returns channels to read task and container state changes. These changes should be read as soon as possible as them not being read will block processing the task referenced by the event.

func (*DockerTaskEngine) UnmarshalJSON 

func (engine *DockerTaskEngine) UnmarshalJSON(data []byte) error

UnmarshalJSON restores a previously marshaled task-engine state from json

func (*DockerTaskEngine) Version added in v1.0.0 

func (engine *DockerTaskEngine) Version() (string, error)

Version returns the underlying docker version.

type DockerTimeoutError added in v1.1.0 

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

DockerTimeoutError is an error type for describing timeouts

func (*DockerTimeoutError) Error added in v1.1.0 

func (err *DockerTimeoutError) Error() string

func (*DockerTimeoutError) ErrorName added in v1.1.0 

func (err *DockerTimeoutError) ErrorName() string

ErrorName returns the name of the error

type ImageManager added in v1.13.0 

type ImageManager interface {
	RecordContainerReference(container *api.Container) error
	RemoveContainerReferenceFromImageState(container *api.Container) error
	AddAllImageStates(imageStates []*image.ImageState)
	GetImageStateFromImageName(containerImageName string) *image.ImageState
	StartImageCleanupProcess(ctx context.Context)
	SetSaver(stateManager statemanager.Saver)
}

ImageManager is responsible for saving the Image states, adding and removing container references to ImageStates

func NewImageManager added in v1.13.0 

func NewImageManager(cfg *config.Config, client DockerClient, state *dockerstate.DockerTaskEngineState) ImageManager

NewImageManager returns a new ImageManager

type ImageStatesForDeletion added in v1.13.0 

type ImageStatesForDeletion []*image.ImageState

ImageStatesForDeletion is used for implementing the sort interface

func (ImageStatesForDeletion) Len added in v1.13.0 

func (imageStates ImageStatesForDeletion) Len() int

Implementing sort interface based on last used times of the images

func (ImageStatesForDeletion) Less added in v1.13.0 

func (imageStates ImageStatesForDeletion) Less(i, j int) bool

func (ImageStatesForDeletion) Swap added in v1.13.0 

func (imageStates ImageStatesForDeletion) Swap(i, j int)

type ListContainersResponse added in v1.2.0 

type ListContainersResponse struct {
	DockerIDs []string
	Error     error
}

ListContainersResponse encapsulates the response from the docker client for the ListContainers call.

type MockDockerClient added in v1.7.0 

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

Mock of DockerClient interface

func NewMockDockerClient added in v1.7.0 

func NewMockDockerClient(ctrl *gomock.Controller) *MockDockerClient

func (*MockDockerClient) ContainerEvents added in v1.7.0 

func (_m *MockDockerClient) ContainerEvents(_param0 context.Context) (<-chan DockerContainerChangeEvent, error)

func (*MockDockerClient) CreateContainer added in v1.7.0 

func (_m *MockDockerClient) CreateContainer(_param0 *go_dockerclient.Config, _param1 *go_dockerclient.HostConfig, _param2 string, _param3 time.Duration) DockerContainerMetadata

func (*MockDockerClient) DescribeContainer added in v1.7.0 

func (_m *MockDockerClient) DescribeContainer(_param0 string) (api.ContainerStatus, DockerContainerMetadata)

func (*MockDockerClient) EXPECT added in v1.7.0 

func (_m *MockDockerClient) EXPECT() *_MockDockerClientRecorder

func (*MockDockerClient) InspectContainer added in v1.7.0 

func (_m *MockDockerClient) InspectContainer(_param0 string, _param1 time.Duration) (*go_dockerclient.Container, error)

func (*MockDockerClient) InspectImage added in v1.13.0 

func (_m *MockDockerClient) InspectImage(_param0 string) (*go_dockerclient.Image, error)

func (*MockDockerClient) ListContainers added in v1.7.0 

func (_m *MockDockerClient) ListContainers(_param0 bool, _param1 time.Duration) ListContainersResponse

func (*MockDockerClient) PullImage added in v1.7.0 

func (_m *MockDockerClient) PullImage(_param0 string, _param1 *api.RegistryAuthenticationData) DockerContainerMetadata

func (*MockDockerClient) RemoveContainer added in v1.7.0 

func (_m *MockDockerClient) RemoveContainer(_param0 string, _param1 time.Duration) error

func (*MockDockerClient) RemoveImage added in v1.13.0 

func (_m *MockDockerClient) RemoveImage(_param0 string, _param1 time.Duration) error

func (*MockDockerClient) StartContainer added in v1.7.0 

func (_m *MockDockerClient) StartContainer(_param0 string, _param1 time.Duration) DockerContainerMetadata

func (*MockDockerClient) Stats added in v1.10.0 

func (_m *MockDockerClient) Stats(_param0 string, _param1 context.Context) (<-chan *go_dockerclient.Stats, error)

func (*MockDockerClient) StopContainer added in v1.7.0 

func (_m *MockDockerClient) StopContainer(_param0 string, _param1 time.Duration) DockerContainerMetadata

func (*MockDockerClient) SupportedVersions added in v1.7.0 

func (_m *MockDockerClient) SupportedVersions() []dockerclient.DockerVersion

func (*MockDockerClient) Version added in v1.7.0 

func (_m *MockDockerClient) Version() (string, error)

func (*MockDockerClient) WithVersion added in v1.7.0 

func (_m *MockDockerClient) WithVersion(_param0 dockerclient.DockerVersion) DockerClient

type MockImageManager added in v1.13.0 

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

Mock of ImageManager interface

func NewMockImageManager added in v1.13.0 

func NewMockImageManager(ctrl *gomock.Controller) *MockImageManager

func (*MockImageManager) AddAllImageStates added in v1.13.0 

func (_m *MockImageManager) AddAllImageStates(_param0 []*image.ImageState)

func (*MockImageManager) EXPECT added in v1.13.0 

func (_m *MockImageManager) EXPECT() *_MockImageManagerRecorder

func (*MockImageManager) GetImageStateFromImageName added in v1.13.0 

func (_m *MockImageManager) GetImageStateFromImageName(_param0 string) *image.ImageState

func (*MockImageManager) RecordContainerReference added in v1.13.1 

func (_m *MockImageManager) RecordContainerReference(_param0 *api.Container) error

func (*MockImageManager) RemoveContainerReferenceFromImageState added in v1.13.0 

func (_m *MockImageManager) RemoveContainerReferenceFromImageState(_param0 *api.Container) error

func (*MockImageManager) SetSaver added in v1.13.0 

func (_m *MockImageManager) SetSaver(_param0 statemanager.Saver)

func (*MockImageManager) StartImageCleanupProcess added in v1.13.0 

func (_m *MockImageManager) StartImageCleanupProcess(_param0 context.Context)

type MockTaskEngine added in v1.7.0 

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

Mock of TaskEngine interface

func NewMockTaskEngine added in v1.7.0 

func NewMockTaskEngine(ctrl *gomock.Controller) *MockTaskEngine

func (*MockTaskEngine) AddTask added in v1.7.0 

func (_m *MockTaskEngine) AddTask(_param0 *api.Task) error

func (*MockTaskEngine) Capabilities added in v1.7.0 

func (_m *MockTaskEngine) Capabilities() []string

func (*MockTaskEngine) Disable added in v1.7.0 

func (_m *MockTaskEngine) Disable()

func (*MockTaskEngine) EXPECT added in v1.7.0 

func (_m *MockTaskEngine) EXPECT() *_MockTaskEngineRecorder

func (*MockTaskEngine) GetTaskByArn added in v1.8.2 

func (_m *MockTaskEngine) GetTaskByArn(_param0 string) (*api.Task, bool)

func (*MockTaskEngine) Init added in v1.7.0 

func (_m *MockTaskEngine) Init() error

func (*MockTaskEngine) ListTasks added in v1.7.0 

func (_m *MockTaskEngine) ListTasks() ([]*api.Task, error)

func (*MockTaskEngine) MarshalJSON added in v1.7.0 

func (_m *MockTaskEngine) MarshalJSON() ([]byte, error)

func (*MockTaskEngine) MustInit added in v1.7.0 

func (_m *MockTaskEngine) MustInit()

func (*MockTaskEngine) SetSaver added in v1.7.0 

func (_m *MockTaskEngine) SetSaver(_param0 statemanager.Saver)

func (*MockTaskEngine) TaskEvents added in v1.7.0 

func (_m *MockTaskEngine) TaskEvents() (<-chan api.TaskStateChange, <-chan api.ContainerStateChange)

func (*MockTaskEngine) UnmarshalJSON added in v1.7.0 

func (_m *MockTaskEngine) UnmarshalJSON(_param0 []byte) error

func (*MockTaskEngine) Version added in v1.7.0 

func (_m *MockTaskEngine) Version() (string, error)

type OutOfMemoryError added in v1.1.0 

type OutOfMemoryError struct{}

OutOfMemoryError is a type for errors caused by running out of memory

func (OutOfMemoryError) Error added in v1.1.0 

func (err OutOfMemoryError) Error() string

func (OutOfMemoryError) ErrorName added in v1.1.0 

func (err OutOfMemoryError) ErrorName() string

ErrorName returns the name of the error

type TaskEngine 

type TaskEngine interface {
	Init() error
	MustInit()
	// Disable *must* only be called when this engine will no longer be used
	// (e.g. right before exiting down the process). It will irreversably stop
	// this task engine from processing new tasks
	Disable()

	// TaskEvents will provide information about tasks that have been previously
	// executed. Specifically, it will provide information when they reach
	// running or stopped, as well as providing portbinding and other metadata
	TaskEvents() (<-chan api.TaskStateChange, <-chan api.ContainerStateChange)
	SetSaver(statemanager.Saver)

	// AddTask adds a new task to the task engine and manages its container's
	// lifecycle. If it returns an error, the task was not added.
	AddTask(*api.Task) error

	// ListTasks lists all the tasks being managed by the TaskEngine.
	ListTasks() ([]*api.Task, error)

	// GetTaskByArn gets a managed task, given a task arn.
	GetTaskByArn(string) (*api.Task, bool)

	Version() (string, error)
	// Capabilities returns an array of capabilities this task engine has, which
	// should model what it can execute.
	Capabilities() []string

	json.Marshaler
	json.Unmarshaler
}

TaskEngine is an interface for the DockerTaskEngine

func NewTaskEngine 

func NewTaskEngine(cfg *config.Config, client DockerClient, credentialsManager credentials.Manager, containerChangeEventStream *eventstream.EventStream, imageManager ImageManager, state *dockerstate.DockerTaskEngineState) TaskEngine

NewTaskEngine returns a default TaskEngine

type TaskStoppedBeforePullBeginError added in v1.13.0 

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

TaskStoppedBeforePullBeginError is a type for task errors involving pull

func (TaskStoppedBeforePullBeginError) Error added in v1.13.0 

func (err TaskStoppedBeforePullBeginError) Error() string

func (TaskStoppedBeforePullBeginError) ErrorName added in v1.13.0 

func (TaskStoppedBeforePullBeginError) ErrorName() string

ErrorName returns the name of the error

Source Files

View all Source files

Directories

Path Synopsis
Package dockerauth handles storing auth configuration information for Docker registries.
 Package dockerauth handles storing auth configuration information for Docker registries.
mocks
Package dockeriface contains an interface for go-dockerclient matching the subset used by the agent
 Package dockeriface contains an interface for go-dockerclient matching the subset used by the agent
mocks
testutils
Package testutils contains files that are used in tests but not elsewhere and thus can be excluded from the final executable.
 Package testutils contains files that are used in tests but not elsewhere and thus can be excluded from the final executable.
Package emptyvolume contains some information related to the 'emptyvolumes'
 Package emptyvolume contains some information related to the 'emptyvolumes'
Package testutils contains files that are used in tests but not elsewhere and thus can be excluded from the final executable.
 Package testutils contains files that are used in tests but not elsewhere and thus can be excluded from the final executable.

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