wasmtime

Documentation

Index

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

Functions

func NewPlugin

func NewPlugin(logger hclog.Logger) drivers.DriverPlugin

NewPlugin returns a new example driver plugin

Types

type Config

type Config 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.
	Path string `codec:"path"`
}

Config contains configuration information for the plugin

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.
	Binary   string `codec:"binary"`
	InvokeFn string `codec:"invoke_fn"`
}

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.

type WasmtimeDriverPlugin

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

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

func (*WasmtimeDriverPlugin) Capabilities

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

Capabilities returns the features supported by the driver.

func (*WasmtimeDriverPlugin) ConfigSchema

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

ConfigSchema returns the plugin configuration schema.

func (*WasmtimeDriverPlugin) DestroyTask

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

DestroyTask cleans up and removes a task that has terminated.

func (*WasmtimeDriverPlugin) ExecTask

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

ExecTask returns the result of executing the given command inside a task. This is an optional capability.

func (*WasmtimeDriverPlugin) Fingerprint

func (d *WasmtimeDriverPlugin) 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 (*WasmtimeDriverPlugin) InspectTask

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

InspectTask returns detailed status information for the referenced taskID.

func (*WasmtimeDriverPlugin) PluginInfo

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

PluginInfo returns information describing the plugin.

func (*WasmtimeDriverPlugin) RecoverTask

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

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

func (*WasmtimeDriverPlugin) SetConfig

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

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

func (*WasmtimeDriverPlugin) SignalTask

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

SignalTask forwards a signal to a task. This is an optional capability.

func (*WasmtimeDriverPlugin) StartTask

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

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

func (*WasmtimeDriverPlugin) StopTask

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

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

func (*WasmtimeDriverPlugin) TaskConfigSchema

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

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

func (*WasmtimeDriverPlugin) TaskEvents

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

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

func (*WasmtimeDriverPlugin) TaskStats

func (d *WasmtimeDriverPlugin) 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 (*WasmtimeDriverPlugin) WaitTask

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

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