executor

package
Version: v0.0.2 Latest Latest
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Published: Sep 30, 2015 License: Apache-2.0 Imports: 15 Imported by: 0

Documentation

Overview

Package executor includes the interfaces of the mesos executor and the mesos executor driver, as well as an implementation of the driver.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type DriverConfig

type DriverConfig struct {
	Executor         Executor
	HostnameOverride string                              // optional
	BindingAddress   net.IP                              // optional
	BindingPort      uint16                              // optional
	PublishedAddress net.IP                              // optional
	NewMessenger     func() (messenger.Messenger, error) // optional
}

type Executor

type Executor interface {
	/**
	 * Invoked once the executor driver has been able to successfully
	 * connect with Mesos. In particular, a scheduler can pass some
	 * data to its executors through the FrameworkInfo.ExecutorInfo's
	 * data field.
	 */
	Registered(ExecutorDriver, *mesosproto.ExecutorInfo, *mesosproto.FrameworkInfo, *mesosproto.SlaveInfo)

	/**
	 * Invoked when the executor re-registers with a restarted slave.
	 */
	Reregistered(ExecutorDriver, *mesosproto.SlaveInfo)

	/**
	 * Invoked when the executor becomes "disconnected" from the slave
	 * (e.g., the slave is being restarted due to an upgrade).
	 */
	Disconnected(ExecutorDriver)

	/**
	 * Invoked when a task has been launched on this executor (initiated
	 * via SchedulerDriver.LaunchTasks). Note that this task can be realized
	 * with a goroutine, an external process, or some simple computation, however,
	 * no other callbacks will be invoked on this executor until this
	 * callback has returned.
	 */
	LaunchTask(ExecutorDriver, *mesosproto.TaskInfo)

	/**
	 * Invoked when a task running within this executor has been killed
	 * (via SchedulerDriver.KillTask). Note that no status update will
	 * be sent on behalf of the executor, the executor is responsible
	 * for creating a new TaskStatus (i.e., with TASK_KILLED) and
	 * invoking ExecutorDriver.SendStatusUpdate.
	 */
	KillTask(ExecutorDriver, *mesosproto.TaskID)

	/**
	 * Invoked when a framework message has arrived for this
	 * executor. These messages are best effort; do not expect a
	 * framework message to be retransmitted in any reliable fashion.
	 */
	FrameworkMessage(ExecutorDriver, string)

	/**
	 * Invoked when the executor should terminate all of its currently
	 * running tasks. Note that after Mesos has determined that an
	 * executor has terminated, any tasks that the executor did not send
	 * terminal status updates for (e.g., TASK_KILLED, TASK_FINISHED,
	 * TASK_FAILED, etc) a TASK_LOST status update will be created.
	 */
	Shutdown(ExecutorDriver)

	/**
	 * Invoked when a fatal error has occured with the executor and/or
	 * executor driver. The driver will be aborted BEFORE invoking this
	 * callback.
	 */
	Error(ExecutorDriver, string)
}

*

  • Executor callback interface to be implemented by frameworks' executors. Note
  • that only one callback will be invoked at a time, so it is not
  • recommended that you block within a callback because it may cause a
  • deadlock. *
  • Each callback includes an instance to the executor driver that was
  • used to run this executor. The driver will not change for the
  • duration of an executor (i.e., from the point you do
  • ExecutorDriver.Start() to the point that ExecutorDriver.Join()
  • returns). This is intended for convenience so that an executor
  • doesn't need to store a pointer to the driver itself.

type ExecutorDriver

type ExecutorDriver interface {
	/**
	 * Starts the executor driver. This needs to be called before any
	 * other driver calls are made.
	 */
	Start() (mesosproto.Status, error)

	/**
	 * Stops the executor driver.
	 */
	Stop() (mesosproto.Status, error)

	/**
	 * Aborts the driver so that no more callbacks can be made to the
	 * executor. The semantics of abort and stop have deliberately been
	 * separated so that code can detect an aborted driver (i.e., via
	 * the return status of ExecutorDriver.Join, see below), and
	 * instantiate and start another driver if desired (from within the
	 * same process ... although this functionality is currently not
	 * supported for executors).
	 */
	Abort() (mesosproto.Status, error)

	/**
	 * Waits for the driver to be stopped or aborted, possibly
	 * blocking the calling goroutine indefinitely. The return status of
	 * this function can be used to determine if the driver was aborted
	 * (see package mesosproto for a description of Status).
	 */
	Join() (mesosproto.Status, error)

	/**
	 * Starts and immediately joins (i.e., blocks on) the driver.
	 */
	Run() (mesosproto.Status, error)

	/**
	 * Sends a status update to the framework scheduler, retrying as
	 * necessary until an acknowledgement has been received or the
	 * executor is terminated (in which case, a TASK_LOST status update
	 * will be sent). See Scheduler.StatusUpdate for more information
	 * about status update acknowledgements.
	 */
	SendStatusUpdate(*mesosproto.TaskStatus) (mesosproto.Status, error)

	/**
	 * Sends a message to the framework scheduler. These messages are
	 * best effort; do not expect a framework message to be
	 * retransmitted in any reliable fashion.
	 */
	SendFrameworkMessage(string) (mesosproto.Status, error)
}

*

  • ExecutorDriver interface for connecting an executor to Mesos. This
  • interface is used both to manage the executor's lifecycle (start
  • it, stop it, or wait for it to finish) and to interact with Mesos
  • (e.g., send status updates, send framework messages, etc.).
  • A driver method is expected to fail-fast and return an error when possible.
  • Other internal errors (or remote error) that occur asynchronously are handled
  • using the the Executor.Error() callback.

type MesosExecutorDriver

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

MesosExecutorDriver is a implementation of the ExecutorDriver.

func NewMesosExecutorDriver

func NewMesosExecutorDriver(config DriverConfig) (*MesosExecutorDriver, error)

NewMesosExecutorDriver creates a new mesos executor driver.

func (*MesosExecutorDriver) Abort

func (driver *MesosExecutorDriver) Abort() (mesosproto.Status, error)

Abort aborts the driver by sending an 'abortEvent' to the event loop, and receives the result from the response channel.

func (*MesosExecutorDriver) Connected

func (driver *MesosExecutorDriver) Connected() bool

func (*MesosExecutorDriver) Join

func (driver *MesosExecutorDriver) Join() (mesosproto.Status, error)

Join waits for the driver by sending a 'joinEvent' to the event loop, and wait on a channel for the notification of driver termination.

func (*MesosExecutorDriver) Run

func (driver *MesosExecutorDriver) Run() (mesosproto.Status, error)

Run starts the driver and calls Join() to wait for stop request.

func (*MesosExecutorDriver) Running

func (driver *MesosExecutorDriver) Running() bool

func (*MesosExecutorDriver) SendFrameworkMessage

func (driver *MesosExecutorDriver) SendFrameworkMessage(data string) (mesosproto.Status, error)

SendFrameworkMessage sends the framework message by sending a 'sendFrameworkMessageEvent' to the event loop, and receives the result from the response channel.

func (*MesosExecutorDriver) SendStatusUpdate

func (driver *MesosExecutorDriver) SendStatusUpdate(taskStatus *mesosproto.TaskStatus) (mesosproto.Status, error)

SendStatusUpdate sends status updates to the slave.

func (*MesosExecutorDriver) Start

func (driver *MesosExecutorDriver) Start() (mesosproto.Status, error)

Start starts the executor driver

func (*MesosExecutorDriver) Status

func (driver *MesosExecutorDriver) Status() mesosproto.Status

------------------------- Accessors ----------------------- //

func (*MesosExecutorDriver) Stop

func (driver *MesosExecutorDriver) Stop() (mesosproto.Status, error)

Stop stops the driver by sending a 'stopEvent' to the event loop, and receives the result from the response channel.

type MockedExecutor

type MockedExecutor struct {
	mock.Mock
}

MockedExecutor is used for testing the executor driver.

func NewMockedExecutor

func NewMockedExecutor() *MockedExecutor

NewMockedExecutor returns a mocked executor.

func (*MockedExecutor) Disconnected

func (e *MockedExecutor) Disconnected(ExecutorDriver)

Disconnected implements the Disconnected handler.

func (*MockedExecutor) Error

Error implements the Error handler.

func (*MockedExecutor) FrameworkMessage

func (e *MockedExecutor) FrameworkMessage(ExecutorDriver, string)

FrameworkMessage implements the FrameworkMessage handler.

func (*MockedExecutor) KillTask

KillTask implements the KillTask handler.

func (*MockedExecutor) LaunchTask

LaunchTask implements the LaunchTask handler.

func (*MockedExecutor) Registered

Registered implements the Registered handler.

func (*MockedExecutor) Reregistered

Reregistered implements the Reregistered handler.

func (*MockedExecutor) Shutdown

func (e *MockedExecutor) Shutdown(ExecutorDriver)

Shutdown implements the Shutdown handler.

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