dockertools

package
v0.16.1 Latest Latest
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 Go to latest Published: May 1, 2015 License: Apache-2.0 Imports: 31 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 HashContainer 

func HashContainer(container *api.Container) uint64

func NewVersion added in v0.16.0 

func NewVersion(input string) (dockerVersion, error)

func StartPty added in v0.12.1 

func StartPty(c *exec.Cmd) (*os.File, error)

Types

type ContainerCommandRunner 

type ContainerCommandRunner interface {
	RunInContainer(containerID string, cmd []string) ([]byte, error)
	ExecInContainer(containerID string, cmd []string, in io.Reader, out, err io.WriteCloser, tty bool) error
	PortForward(pod *kubecontainer.Pod, port uint16, stream io.ReadWriteCloser) error
}

TODO(yifan): Move this to container.Runtime.

type DockerContainers 

type DockerContainers map[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 DockerID 

type DockerID string

DockerID is an ID of docker container. It is a type to make it clear when we're working with docker container Ids

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
}

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

func ConnectToDockerOrDie added in v0.11.0 

func ConnectToDockerOrDie(dockerEndpoint string) DockerInterface

func NewInstrumentedDockerInterface added in v0.16.0 

func NewInstrumentedDockerInterface(dockerClient DockerInterface) DockerInterface

Creates an instrumented DockerInterface from an existing DockerInterface.

type DockerManager added in v0.16.0 

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
}

TODO: Eventually DockerManager should implement kubecontainer.Runtime interface.

func NewDockerManager added in v0.16.0 

func NewDockerManager(
	client DockerInterface,
	recorder record.EventRecorder,
	readinessManager *kubecontainer.ReadinessManager,
	containerRefManager *kubecontainer.RefManager,
	podInfraContainerImage string,
	qps float32,
	burst int,
	containerLogsDir string,
	osInterface kubecontainer.OSInterface) *DockerManager

func (*DockerManager) CreatePodInfraContainer added in v0.16.0 

func (dm *DockerManager) CreatePodInfraContainer(pod *api.Pod, generator kubecontainer.RunContainerOptionsGenerator, runner kubecontainer.HandlerRunner) (DockerID, error)

CreatePodInfraContainer starts the pod infra container for a pod. Returns the docker container ID of the newly created container.

func (*DockerManager) ExecInContainer added in v0.16.0 

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) GetKubeletDockerContainerLogs added in v0.16.0 

func (dm *DockerManager) GetKubeletDockerContainerLogs(containerID, tail string, follow bool, stdout, stderr io.Writer) (err error)

GetKubeletDockerContainerLogs 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) GetPodInfraContainer added in v0.16.0 

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

func (*DockerManager) GetPodStatus added in v0.16.0 

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 v0.16.0 

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

func (*DockerManager) GetRunningContainers added in v0.16.0 

func (dm *DockerManager) GetRunningContainers(ids []string) ([]*docker.Container, error)

func (*DockerManager) IsImagePresent added in v0.16.0 

func (dm *DockerManager) IsImagePresent(image string) (bool, error)

func (*DockerManager) KillContainer added in v0.16.0 

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

KillContainer kills a container identified by containerID. Internally, it invokes docker's StopContainer API with a timeout of 10s. TODO(yifan): Use new ContainerID type.

func (*DockerManager) KillPod added in v0.16.0 

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

Kills all containers in the specified pod

func (*DockerManager) PodInfraContainerChanged added in v0.16.0 

func (dm *DockerManager) PodInfraContainerChanged(pod *api.Pod, podInfraContainer *kubecontainer.Container) (bool, error)

PodInfraContainer returns true if the pod infra container has changed.

func (*DockerManager) PortForward added in v0.16.0 

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) Pull added in v0.16.0 

func (dm *DockerManager) Pull(image string) error

func (*DockerManager) RunContainer added in v0.16.0 

func (dm *DockerManager) RunContainer(pod *api.Pod, container *api.Container, generator kubecontainer.RunContainerOptionsGenerator, runner kubecontainer.HandlerRunner, netMode, ipcMode string) (DockerID, error)

Run a single container from a pod. Returns the docker container ID

func (*DockerManager) RunInContainer added in v0.16.0 

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) Version added in v0.16.0 

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

type DockerPuller 

type DockerPuller interface {
	Pull(image string) 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
	// 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 v0.16.0 

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

func (*FakeDockerClient) AssertStopped added in v0.16.0 

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

func (*FakeDockerClient) AssertUnorderedCalls added in v0.14.0 

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

func (*FakeDockerClient) ClearCalls added in v0.8.2 

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 added in v0.5.1 

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

func (*FakeDockerClient) Info added in v0.16.0 

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) 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 v0.8.2 

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 v0.4.2 

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

func (*FakeDockerClient) RemoveImage added in v0.8.2 

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 added in v0.5.1 

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 added in v0.5.1 

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) (err error)

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

type KubeletContainerName added in v0.14.0 

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.

Source Files

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