deviceplugin

Documentation

Overview

Package deviceplugin provides API for reporting available devices to kubelet.

Index

• type Allocator
• type ContainerPreStarter
• type DeviceInfo
  • func NewDeviceInfo(state string, nodes []pluginapi.DeviceSpec, mounts []pluginapi.Mount, ...) DeviceInfo
  • func NewDeviceInfoWithTopologyHints(state string, nodes []pluginapi.DeviceSpec, mounts []pluginapi.Mount, ...) DeviceInfo
• type DeviceTree
  • func NewDeviceTree() DeviceTree
  • func (tree DeviceTree) AddDevice(devType, id string, info DeviceInfo)
  • func (tree DeviceTree) DeviceTypeCount(devType string) int
• type Manager
  • func NewManager(namespace string, devicePlugin Scanner) *Manager
  • func (m *Manager) Run()
• type Notifier
• type PostAllocator
• type PreferredAllocator
• type Scanner
• type UseDefaultMethodError
  • func (e *UseDefaultMethodError) Error() string

Types

type Allocator

type Allocator interface {
	// Allocate allows the plugin to replace the server Allocate(). Plugin can return
	// UseDefaultAllocateMethod if the default server allocation is anyhow preferred
	// for the particular allocation request.
	Allocate(*pluginapi.AllocateRequest) (*pluginapi.AllocateResponse, error)
}

Allocator is an optional interface implemented by device plugins.

type ContainerPreStarter

type ContainerPreStarter interface {
	// PreStartContainer  defines device initialization function before container is started.
	// It might include operations like card reset.
	PreStartContainer(*pluginapi.PreStartContainerRequest) error
}

ContainerPreStarter is an optional interface implemented by device plugins.

type DeviceInfo

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

DeviceInfo contains information about device maintained by Device Plugin.

func NewDeviceInfo

func NewDeviceInfo(state string, nodes []pluginapi.DeviceSpec, mounts []pluginapi.Mount, envs map[string]string, annotations map[string]string) DeviceInfo

NewDeviceInfo makes DeviceInfo struct and adds topology information to it.

func NewDeviceInfoWithTopologyHints

func NewDeviceInfoWithTopologyHints(state string, nodes []pluginapi.DeviceSpec, mounts []pluginapi.Mount, envs map[string]string,
	annotations map[string]string, topology *pluginapi.TopologyInfo) DeviceInfo

NewDeviceInfoWithTopologyHints makes DeviceInfo struct with topology information provided to it.

type DeviceTree

type DeviceTree map[string]map[string]DeviceInfo

DeviceTree contains a tree-like structure of device type -> device ID -> device info.

func NewDeviceTree

func NewDeviceTree() DeviceTree

NewDeviceTree creates an instance of DeviceTree.

func (DeviceTree) AddDevice

func (tree DeviceTree) AddDevice(devType, id string, info DeviceInfo)

AddDevice adds device info to DeviceTree.

func (DeviceTree) DeviceTypeCount

func (tree DeviceTree) DeviceTypeCount(devType string) int

DeviceTypeCount returns number of device of given type.

type Manager

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

Manager manages life cycle of device plugins and handles the scan results received from them.

func NewManager

func NewManager(namespace string, devicePlugin Scanner) *Manager

NewManager creates a new instance of Manager.

func (*Manager) Run

func (m *Manager) Run()

Run prepares and launches event loop for updates from Scanner.

type Notifier

type Notifier interface {
	// Notify notifies manager with a device tree constructed by device
	// plugin during scanning process.
	Notify(DeviceTree)
}

Notifier receives updates from Scanner, detects changes and sends the detected changes to a channel given by the creator of a Notifier object.

type PostAllocator

type PostAllocator interface {
	// PostAllocate modifies responses returned by Allocate() by e.g.
	// adding annotations consumed by CRI hooks to the responses.
	PostAllocate(*pluginapi.AllocateResponse) error
}

PostAllocator is an optional interface implemented by device plugins.

type PreferredAllocator

type PreferredAllocator interface {
	// GetPreferredAllocation defines the list of devices preferred for allocating next.
	GetPreferredAllocation(*pluginapi.PreferredAllocationRequest) (*pluginapi.PreferredAllocationResponse, error)
}

PreferredAllocator is an optional interface implemented by device plugins.

type Scanner

type Scanner interface {
	// Scan scans the host for devices and sends all found devices to
	// a Notifier instance. It's called only once for every device plugin by
	// Manager in a goroutine and operates in an infinite loop.
	Scan(Notifier) error
}

Scanner serves as an interface between Manager and a device plugin.

type UseDefaultMethodError

type UseDefaultMethodError struct{}

UseDefaultMethodError allows the plugin to request running the default logic even while implementing an optional interface. This is currently supported only with the Allocator interface.

func (*UseDefaultMethodError) Error

func (e *UseDefaultMethodError) Error() string