hello

Documentation

Index

• func NewPlugin(logger hclog.Logger) drivers.DriverPlugin
• type Config
• type HelloDriverPlugin
  • func (d *HelloDriverPlugin) Capabilities() (*drivers.Capabilities, error)
  • func (d *HelloDriverPlugin) ConfigSchema() (*hclspec.Spec, error)
  • func (d *HelloDriverPlugin) DestroyTask(taskID string, force bool) error
  • func (d *HelloDriverPlugin) ExecTask(taskID string, cmd []string, timeout time.Duration) (*drivers.ExecTaskResult, error)
  • func (d *HelloDriverPlugin) Fingerprint(ctx context.Context) (<-chan *drivers.Fingerprint, error)
  • func (d *HelloDriverPlugin) InspectTask(taskID string) (*drivers.TaskStatus, error)
  • func (d *HelloDriverPlugin) PluginInfo() (*base.PluginInfoResponse, error)
  • func (d *HelloDriverPlugin) RecoverTask(handle *drivers.TaskHandle) error
  • func (d *HelloDriverPlugin) SetConfig(cfg *base.Config) error
  • func (d *HelloDriverPlugin) SignalTask(taskID string, signal string) error
  • func (d *HelloDriverPlugin) StartTask(cfg *drivers.TaskConfig) (*drivers.TaskHandle, *drivers.DriverNetwork, error)
  • func (d *HelloDriverPlugin) StopTask(taskID string, timeout time.Duration, signal string) error
  • func (d *HelloDriverPlugin) TaskConfigSchema() (*hclspec.Spec, error)
  • func (d *HelloDriverPlugin) TaskEvents(ctx context.Context) (<-chan *drivers.TaskEvent, error)
  • func (d *HelloDriverPlugin) TaskStats(ctx context.Context, taskID string, interval time.Duration) (<-chan *drivers.TaskResourceUsage, error)
  • func (d *HelloDriverPlugin) WaitTask(ctx context.Context, taskID string) (<-chan *drivers.ExitResult, error)
• type TaskConfig
• type TaskState

Functions

func NewPlugin

func NewPlugin(logger hclog.Logger) drivers.DriverPlugin

NewPlugin returns a new example driver plugin

Types

type Config

type Config struct {
	// TODO: create decoded plugin configuration struct
	//
	// This struct is the decoded version of the schema defined in the
	// configSpec variable above. It's used to convert the HCL configuration
	// passed by the Nomad agent into Go contructs.
	Shell string `codec:"shell"`
}

Config contains configuration information for the plugin

type HelloDriverPlugin

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

HelloDriverPlugin is an example driver plugin. When provisioned in a job, the taks will output a greet specified by the user.

func (*HelloDriverPlugin) Capabilities

func (d *HelloDriverPlugin) Capabilities() (*drivers.Capabilities, error)

Capabilities returns the features supported by the driver.

func (*HelloDriverPlugin) ConfigSchema

func (d *HelloDriverPlugin) ConfigSchema() (*hclspec.Spec, error)

ConfigSchema returns the plugin configuration schema.

func (*HelloDriverPlugin) DestroyTask

func (d *HelloDriverPlugin) DestroyTask(taskID string, force bool) error

DestroyTask cleans up and removes a task that has terminated.

func (*HelloDriverPlugin) ExecTask

func (d *HelloDriverPlugin) ExecTask(taskID string, cmd []string, timeout time.Duration) (*drivers.ExecTaskResult, error)

ExecTask returns the result of executing the given command inside a task.

func (*HelloDriverPlugin) Fingerprint

func (d *HelloDriverPlugin) Fingerprint(ctx context.Context) (<-chan *drivers.Fingerprint, error)

Fingerprint returns a channel that will be used to send health information and other driver specific node attributes.

func (*HelloDriverPlugin) InspectTask

func (d *HelloDriverPlugin) InspectTask(taskID string) (*drivers.TaskStatus, error)

InspectTask returns detailed status information for the referenced taskID.

func (*HelloDriverPlugin) PluginInfo

func (d *HelloDriverPlugin) PluginInfo() (*base.PluginInfoResponse, error)

PluginInfo returns information describing the plugin.

func (*HelloDriverPlugin) RecoverTask

func (d *HelloDriverPlugin) RecoverTask(handle *drivers.TaskHandle) error

RecoverTask recreates the in-memory state of a task from a TaskHandle.

func (*HelloDriverPlugin) SetConfig

func (d *HelloDriverPlugin) SetConfig(cfg *base.Config) error

SetConfig is called by the client to pass the configuration for the plugin.

func (*HelloDriverPlugin) SignalTask

func (d *HelloDriverPlugin) SignalTask(taskID string, signal string) error

SignalTask forwards a signal to a task.

func (*HelloDriverPlugin) StartTask

func (d *HelloDriverPlugin) StartTask(cfg *drivers.TaskConfig) (*drivers.TaskHandle, *drivers.DriverNetwork, error)

StartTask returns a task handle and a driver network if necessary.

func (*HelloDriverPlugin) StopTask

func (d *HelloDriverPlugin) StopTask(taskID string, timeout time.Duration, signal string) error

StopTask stops a running task with the given signal and within the timeout window.

func (*HelloDriverPlugin) TaskConfigSchema

func (d *HelloDriverPlugin) TaskConfigSchema() (*hclspec.Spec, error)

TaskConfigSchema returns the HCL schema for the configuration of a task.

func (*HelloDriverPlugin) TaskEvents

func (d *HelloDriverPlugin) TaskEvents(ctx context.Context) (<-chan *drivers.TaskEvent, error)

TaskEvents returns a channel that the plugin can use to emit task related events.

func (*HelloDriverPlugin) TaskStats

func (d *HelloDriverPlugin) TaskStats(ctx context.Context, taskID string, interval time.Duration) (<-chan *drivers.TaskResourceUsage, error)

TaskStats returns a channel which the driver should send stats to at the given interval.

func (*HelloDriverPlugin) WaitTask

func (d *HelloDriverPlugin) WaitTask(ctx context.Context, taskID string) (<-chan *drivers.ExitResult, error)

WaitTask returns a channel used to notify Nomad when a task exits.

type TaskConfig

type TaskConfig struct {
	// TODO: create decoded plugin task configuration struct
	//
	// This struct is the decoded version of the schema defined in the
	// taskConfigSpec variable above. It's used to convert the string
	// configuration for the task into Go contructs.
	Greeting string `codec:"greeting"`
}

TaskConfig contains configuration information for a task that runs with this plugin

type TaskState

type TaskState struct {
	ReattachConfig *structs.ReattachConfig
	TaskConfig     *drivers.TaskConfig
	StartedAt      time.Time

	// TODO: add any extra important values that must be persisted in order to
	// restore a task.
	//
	// The plugin keeps track of its running tasks in a in-memory data
	// structure. If the plugin crashes, this data will be lost, so Nomad will
	// respawn a new instance of the plugin and try to restore its in-memory
	// representation of the running tasks using the RecoverTask() method below.
	Pid int
}

TaskState is the runtime state which is encoded in the handle returned to Nomad client. This information is needed to rebuild the task state and handler during recovery.