dockertools

package
Version: v0.5.3 Latest Latest
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Published: May 28, 2015 License: Apache-2.0 Imports: 36 Imported by: 0

Documentation

Index

Constants

View Source
const (
	PodInfraContainerName  = leaky.PodInfraContainerName
	DockerPrefix           = "docker://"
	PodInfraContainerImage = "gcr.io/google_containers/pause:0.8.0"
)

Variables

View Source
var (
	// ErrNoContainersInPod is returned when there are no containers for a given pod
	ErrNoContainersInPod = errors.New("no containers exist for this pod")

	// ErrNoPodInfraContainerInPod is returned when there is no pod infra container for a given pod
	ErrNoPodInfraContainerInPod = errors.New("No pod infra container exists for this pod")

	// ErrContainerCannotRun is returned when a container is created, but cannot run properly
	ErrContainerCannotRun = errors.New("Container cannot run")
)

Functions

func BuildDockerName

func BuildDockerName(dockerName KubeletContainerName, container *api.Container) string

Creates a name which can be reversed to identify both full pod name and container name.

func NewVersion added in v0.5.1

func NewVersion(input string) (dockerVersion, error)

Types

type DockerContainers

type DockerContainers map[kubeletTypes.DockerID]*docker.APIContainers

DockerContainers is a map of containers

func GetKubeletDockerContainers

func GetKubeletDockerContainers(client DockerInterface, allContainers bool) (DockerContainers, error)

GetKubeletDockerContainers lists all container or just the running ones. Returns a map of docker containers that we manage, keyed by container ID. TODO: Move this function with dockerCache to DockerManager.

func (DockerContainers) FindPodContainer

func (c DockerContainers) FindPodContainer(podFullName string, uid types.UID, containerName string) (*docker.APIContainers, bool, uint64)

type DockerInterface

type DockerInterface interface {
	ListContainers(options docker.ListContainersOptions) ([]docker.APIContainers, error)
	InspectContainer(id string) (*docker.Container, error)
	CreateContainer(docker.CreateContainerOptions) (*docker.Container, error)
	StartContainer(id string, hostConfig *docker.HostConfig) error
	StopContainer(id string, timeout uint) error
	RemoveContainer(opts docker.RemoveContainerOptions) error
	InspectImage(image string) (*docker.Image, error)
	ListImages(opts docker.ListImagesOptions) ([]docker.APIImages, error)
	PullImage(opts docker.PullImageOptions, auth docker.AuthConfiguration) error
	RemoveImage(image string) error
	Logs(opts docker.LogsOptions) error
	Version() (*docker.Env, error)
	Info() (*docker.Env, error)
	CreateExec(docker.CreateExecOptions) (*docker.Exec, error)
	StartExec(string, docker.StartExecOptions) error
	InspectExec(id string) (*docker.ExecInspect, error)
}

DockerInterface is an abstract interface for testability. It abstracts the interface of docker.Client.

func ConnectToDockerOrDie added in v0.3.2

func ConnectToDockerOrDie(dockerEndpoint string) DockerInterface

func NewInstrumentedDockerInterface added in v0.5.1

func NewInstrumentedDockerInterface(dockerClient DockerInterface) DockerInterface

Creates an instrumented DockerInterface from an existing DockerInterface.

type DockerManager added in v0.4.4

type DockerManager struct {

	// TODO(yifan): PodInfraContainerImage can be unexported once
	// we move createPodInfraContainer into dockertools.
	PodInfraContainerImage string

	// TODO(yifan): We export this for testability, so when we have a fake
	// container manager, then we can unexport this. Also at that time, we
	// use the concrete type so that we can record the pull failure and eliminate
	// the image checking in GetPodStatus().
	Puller DockerPuller
	// contains filtered or unexported fields
}

func NewDockerManager added in v0.4.4

func NewDockerManager(
	client DockerInterface,
	recorder record.EventRecorder,
	readinessManager *kubecontainer.ReadinessManager,
	containerRefManager *kubecontainer.RefManager,
	podInfraContainerImage string,
	qps float32,
	burst int,
	containerLogsDir string,
	osInterface kubecontainer.OSInterface,
	networkPlugin network.NetworkPlugin,
	generator kubecontainer.RunContainerOptionsGenerator,
	httpClient kubeletTypes.HttpGetter,
	runtimeHooks kubecontainer.RuntimeHooks) *DockerManager

func NewFakeDockerManager added in v0.5.1

func NewFakeDockerManager(
	client DockerInterface,
	recorder record.EventRecorder,
	readinessManager *kubecontainer.ReadinessManager,
	containerRefManager *kubecontainer.RefManager,
	podInfraContainerImage string,
	qps float32,
	burst int,
	containerLogsDir string,
	osInterface kubecontainer.OSInterface,
	networkPlugin network.NetworkPlugin,
	generator kubecontainer.RunContainerOptionsGenerator,
	httpClient kubeletTypes.HttpGetter,
	runtimeHooks kubecontainer.RuntimeHooks) *DockerManager

func (*DockerManager) ExecInContainer added in v0.5.1

func (dm *DockerManager) ExecInContainer(containerId string, cmd []string, stdin io.Reader, stdout, stderr io.WriteCloser, tty bool) error

ExecInContainer uses nsenter to run the command inside the container identified by containerID.

TODO:

- match cgroups of container
- should we support `docker exec`?
- should we support nsenter in a container, running with elevated privs and --pid=host?
- use strong type for containerId

func (*DockerManager) GetContainerLogs added in v0.5.1

func (dm *DockerManager) GetContainerLogs(pod *api.Pod, containerID, tail string, follow bool, stdout, stderr io.Writer) (err error)

GetContainerLogs returns logs of a specific container. By default, it returns a snapshot of the container log. Set 'follow' to true to stream the log. Set 'follow' to false and specify the number of lines (e.g. "100" or "all") to tail the log. TODO: Make 'RawTerminal' option flagable.

func (*DockerManager) GetContainers added in v0.5.1

func (dm *DockerManager) GetContainers(all bool) ([]*kubecontainer.Container, error)

GetContainers returns a list of running containers if |all| is false; otherwise, it returns all containers.

func (*DockerManager) GetPodInfraContainer added in v0.5.1

func (dm *DockerManager) GetPodInfraContainer(pod kubecontainer.Pod) (kubecontainer.Container, error)

func (*DockerManager) GetPodStatus added in v0.4.4

func (dm *DockerManager) GetPodStatus(pod *api.Pod) (*api.PodStatus, error)

GetPodStatus returns docker related status for all containers in the pod as well as the infrastructure container.

func (*DockerManager) GetPods added in v0.5.1

func (dm *DockerManager) GetPods(all bool) ([]*kubecontainer.Pod, error)

func (*DockerManager) IsImagePresent added in v0.5.1

func (dm *DockerManager) IsImagePresent(image kubecontainer.ImageSpec) (bool, error)

IsImagePresent checks whether the container image is already in the local storage.

func (*DockerManager) KillContainer added in v0.5.1

func (dm *DockerManager) KillContainer(containerID types.UID) error

TODO(vmarmol): Unexport this as it is no longer used externally. KillContainer kills a container identified by containerID. Internally, it invokes docker's StopContainer API with a timeout of 10s. TODO: Deprecate this function in favor of KillContainerInPod.

func (*DockerManager) KillContainerInPod added in v0.5.1

func (dm *DockerManager) KillContainerInPod(container api.Container, pod *api.Pod) error

KillContainerInPod kills a container in the pod.

func (*DockerManager) KillPod added in v0.5.1

func (dm *DockerManager) KillPod(pod kubecontainer.Pod) error

Kills all containers in the specified pod

func (*DockerManager) ListImages added in v0.5.1

func (dm *DockerManager) ListImages() ([]kubecontainer.Image, error)

List all images in the local storage.

func (*DockerManager) PortForward added in v0.5.1

func (dm *DockerManager) PortForward(pod *kubecontainer.Pod, port uint16, stream io.ReadWriteCloser) error

PortForward executes socat in the pod's network namespace and copies data between stream (representing the user's local connection on their computer) and the specified port in the container.

TODO:

- match cgroups of container
- should we support nsenter + socat on the host? (current impl)
- should we support nsenter + socat in a container, running with elevated privs and --pid=host?

func (*DockerManager) PullImage added in v0.5.1

func (dm *DockerManager) PullImage(image kubecontainer.ImageSpec, secrets []api.Secret) error

TODO(vmarmol): Consider unexporting. PullImage pulls an image from network to local storage.

func (*DockerManager) RemoveImage added in v0.5.1

func (dm *DockerManager) RemoveImage(image kubecontainer.ImageSpec) error

Removes the specified image.

func (*DockerManager) RunInContainer added in v0.5.1

func (dm *DockerManager) RunInContainer(containerID string, cmd []string) ([]byte, error)

RunInContainer uses nsinit to run the command inside the container identified by containerID TODO(yifan): Use strong type for containerID.

func (*DockerManager) SyncPod added in v0.5.1

func (dm *DockerManager) SyncPod(pod *api.Pod, runningPod kubecontainer.Pod, podStatus api.PodStatus, pullSecrets []api.Secret) error

Sync the running pod to match the specified desired pod.

func (*DockerManager) Version added in v0.5.1

func (dm *DockerManager) Version() (kubecontainer.Version, error)

type DockerPuller

type DockerPuller interface {
	Pull(image string, secrets []api.Secret) error
	IsImagePresent(image string) (bool, error)
}

DockerPuller is an abstract interface for testability. It abstracts image pull operations.

type FakeDockerClient

type FakeDockerClient struct {
	sync.Mutex
	ContainerList       []docker.APIContainers
	ExitedContainerList []docker.APIContainers
	Container           *docker.Container
	ContainerMap        map[string]*docker.Container
	Image               *docker.Image
	Images              []docker.APIImages
	Errors              map[string]error

	Stopped []string

	Created       []string
	Removed       []string
	RemovedImages util.StringSet
	VersionInfo   docker.Env
	Information   docker.Env
	ExecInspect   *docker.ExecInspect
	// contains filtered or unexported fields
}

FakeDockerClient is a simple fake docker client, so that kubelet can be run for testing without requiring a real docker setup.

func (*FakeDockerClient) AssertCalls

func (f *FakeDockerClient) AssertCalls(calls []string) (err error)

func (*FakeDockerClient) AssertCreated added in v0.4.4

func (f *FakeDockerClient) AssertCreated(created []string) error

func (*FakeDockerClient) AssertStopped added in v0.4.4

func (f *FakeDockerClient) AssertStopped(stopped []string) error

func (*FakeDockerClient) AssertUnorderedCalls added in v0.4.3

func (f *FakeDockerClient) AssertUnorderedCalls(calls []string) (err error)

func (*FakeDockerClient) ClearCalls added in v0.2.1

func (f *FakeDockerClient) ClearCalls()

func (*FakeDockerClient) CreateContainer

func (f *FakeDockerClient) CreateContainer(c docker.CreateContainerOptions) (*docker.Container, error)

CreateContainer is a test-spy implementation of DockerInterface.CreateContainer. It adds an entry "create" to the internal method call record.

func (*FakeDockerClient) CreateExec

func (f *FakeDockerClient) CreateExec(opts docker.CreateExecOptions) (*docker.Exec, error)

func (*FakeDockerClient) Info added in v0.5.1

func (f *FakeDockerClient) Info() (*docker.Env, error)

func (*FakeDockerClient) InspectContainer

func (f *FakeDockerClient) InspectContainer(id string) (*docker.Container, error)

InspectContainer is a test-spy implementation of DockerInterface.InspectContainer. It adds an entry "inspect" to the internal method call record.

func (*FakeDockerClient) InspectExec added in v0.5.2

func (f *FakeDockerClient) InspectExec(id string) (*docker.ExecInspect, error)

func (*FakeDockerClient) InspectImage

func (f *FakeDockerClient) InspectImage(name string) (*docker.Image, error)

InspectImage is a test-spy implementation of DockerInterface.InspectImage. It adds an entry "inspect" to the internal method call record.

func (*FakeDockerClient) ListContainers

func (f *FakeDockerClient) ListContainers(options docker.ListContainersOptions) ([]docker.APIContainers, error)

ListContainers is a test-spy implementation of DockerInterface.ListContainers. It adds an entry "list" to the internal method call record.

func (*FakeDockerClient) ListImages added in v0.2.1

func (f *FakeDockerClient) ListImages(opts docker.ListImagesOptions) ([]docker.APIImages, error)

func (*FakeDockerClient) Logs

func (f *FakeDockerClient) Logs(opts docker.LogsOptions) error

Logs is a test-spy implementation of DockerInterface.Logs. It adds an entry "logs" to the internal method call record.

func (*FakeDockerClient) PullImage

func (f *FakeDockerClient) PullImage(opts docker.PullImageOptions, auth docker.AuthConfiguration) error

PullImage is a test-spy implementation of DockerInterface.StopContainer. It adds an entry "pull" to the internal method call record.

func (*FakeDockerClient) RemoveContainer added in v0.2.1

func (f *FakeDockerClient) RemoveContainer(opts docker.RemoveContainerOptions) error

func (*FakeDockerClient) RemoveImage added in v0.2.1

func (f *FakeDockerClient) RemoveImage(image string) error

func (*FakeDockerClient) StartContainer

func (f *FakeDockerClient) StartContainer(id string, hostConfig *docker.HostConfig) error

StartContainer is a test-spy implementation of DockerInterface.StartContainer. It adds an entry "start" to the internal method call record.

func (*FakeDockerClient) StartExec

func (f *FakeDockerClient) StartExec(_ string, _ docker.StartExecOptions) error

func (*FakeDockerClient) StopContainer

func (f *FakeDockerClient) StopContainer(id string, timeout uint) error

StopContainer is a test-spy implementation of DockerInterface.StopContainer. It adds an entry "stop" to the internal method call record.

func (*FakeDockerClient) Version

func (f *FakeDockerClient) Version() (*docker.Env, error)

type FakeDockerPuller

type FakeDockerPuller struct {
	sync.Mutex

	HasImages    []string
	ImagesPulled []string

	// Every pull will return the first error here, and then reslice
	// to remove it. Will give nil errors if this slice is empty.
	ErrorsToInject []error
}

FakeDockerPuller is a stub implementation of DockerPuller.

func (*FakeDockerPuller) IsImagePresent

func (f *FakeDockerPuller) IsImagePresent(name string) (bool, error)

func (*FakeDockerPuller) Pull

func (f *FakeDockerPuller) Pull(image string, secrets []api.Secret) (err error)

Pull records the image pull attempt, and optionally injects an error.

type KubeletContainerName added in v0.4.3

type KubeletContainerName struct {
	PodFullName   string
	PodUID        types.UID
	ContainerName string
}

KubeletContainerName encapsulates a pod name and a Kubernetes container name.

func ParseDockerName

func ParseDockerName(name string) (dockerName *KubeletContainerName, hash uint64, err error)

Unpacks a container name, returning the pod full name and container name we would have used to construct the docker name. If we are unable to parse the name, an error is returned.

type PodContainerChangesSpec added in v0.5.1

type PodContainerChangesSpec struct {
	StartInfraContainer bool
	InfraContainerId    kubeletTypes.DockerID
	ContainersToStart   map[int]empty
	ContainersToKeep    map[kubeletTypes.DockerID]int
}

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