devicemanager

Documentation

Index

• type ActivePodsFunc
• type DeviceRunContainerOptions
• type Manager
• type ManagerImpl
  • func NewManagerImpl() (*ManagerImpl, error)
  • func (m *ManagerImpl) Allocate(node *schedulercache.NodeInfo, attrs *lifecycle.PodAdmitAttributes) error
  • func (m *ManagerImpl) Devices() map[string][]pluginapi.Device
  • func (m *ManagerImpl) GetCapacity() (v1.ResourceList, v1.ResourceList, []string)
  • func (m *ManagerImpl) GetDeviceRunContainerOptions(pod *v1.Pod, container *v1.Container) (*DeviceRunContainerOptions, error)
  • func (m *ManagerImpl) Register(ctx context.Context, r *pluginapi.RegisterRequest) (*pluginapi.Empty, error)
  • func (m *ManagerImpl) Start(activePods ActivePodsFunc, sourcesReady config.SourcesReady) error
  • func (m *ManagerImpl) Stop() error
• type ManagerStub
  • func NewManagerStub() (*ManagerStub, error)
  • func (h *ManagerStub) Allocate(node *schedulercache.NodeInfo, attrs *lifecycle.PodAdmitAttributes) error
  • func (h *ManagerStub) Devices() map[string][]pluginapi.Device
  • func (h *ManagerStub) GetCapacity() (v1.ResourceList, v1.ResourceList, []string)
  • func (h *ManagerStub) GetDeviceRunContainerOptions(pod *v1.Pod, container *v1.Container) (*DeviceRunContainerOptions, error)
  • func (h *ManagerStub) Start(activePods ActivePodsFunc, sourcesReady config.SourcesReady) error
  • func (h *ManagerStub) Stop() error
• type Stub
  • func NewDevicePluginStub(devs []*pluginapi.Device, socket string) *Stub
  • func (m *Stub) Allocate(ctx context.Context, r *pluginapi.AllocateRequest) (*pluginapi.AllocateResponse, error)
  • func (m *Stub) GetDevicePluginOptions(ctx context.Context, e *pluginapi.Empty) (*pluginapi.DevicePluginOptions, error)
  • func (m *Stub) ListAndWatch(e *pluginapi.Empty, s pluginapi.DevicePlugin_ListAndWatchServer) error
  • func (m *Stub) PreStartContainer(ctx context.Context, r *pluginapi.PreStartContainerRequest) (*pluginapi.PreStartContainerResponse, error)
  • func (m *Stub) Register(kubeletEndpoint, resourceName string, preStartContainerFlag bool) error
  • func (m *Stub) SetAllocFunc(f stubAllocFunc)
  • func (m *Stub) Start() error
  • func (m *Stub) Stop() error
  • func (m *Stub) Update(devs []*pluginapi.Device)

Types

type ActivePodsFunc

type ActivePodsFunc func() []*v1.Pod

ActivePodsFunc is a function that returns a list of pods to reconcile.

type DeviceRunContainerOptions

type DeviceRunContainerOptions struct {
	// The environment variables list.
	Envs []kubecontainer.EnvVar
	// The mounts for the container.
	Mounts []kubecontainer.Mount
	// The host devices mapped into the container.
	Devices []kubecontainer.DeviceInfo
	// The Annotations for the container
	Annotations []kubecontainer.Annotation
}

DeviceRunContainerOptions contains the combined container runtime settings to consume its allocated devices.

type Manager

type Manager interface {
	// Start starts device plugin registration service.
	Start(activePods ActivePodsFunc, sourcesReady config.SourcesReady) error

	// Devices is the map of devices that have registered themselves
	// against the manager.
	// The map key is the ResourceName of the device plugins.
	Devices() map[string][]pluginapi.Device

	// Allocate configures and assigns devices to pods. The pods are provided
	// through the pod admission attributes in the attrs argument. From the
	// requested device resources, Allocate will communicate with the owning
	// device plugin to allow setup procedures to take place, and for the
	// device plugin to provide runtime settings to use the device (environment
	// variables, mount points and device files). The node object is provided
	// for the device manager to update the node capacity to reflect the
	// currently available devices.
	Allocate(node *schedulercache.NodeInfo, attrs *lifecycle.PodAdmitAttributes) error

	// Stop stops the manager.
	Stop() error

	// GetDeviceRunContainerOptions checks whether we have cached containerDevices
	// for the passed-in <pod, container> and returns its DeviceRunContainerOptions
	// for the found one. An empty struct is returned in case no cached state is found.
	GetDeviceRunContainerOptions(pod *v1.Pod, container *v1.Container) (*DeviceRunContainerOptions, error)

	// GetCapacity returns the amount of available device plugin resource capacity, resource allocatable
	// and inactive device plugin resources previously registered on the node.
	GetCapacity() (v1.ResourceList, v1.ResourceList, []string)
}

Manager manages all the Device Plugins running on a node.

type ManagerImpl

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

ManagerImpl is the structure in charge of managing Device Plugins.

func NewManagerImpl

func NewManagerImpl() (*ManagerImpl, error)

NewManagerImpl creates a new manager.

func (*ManagerImpl) Allocate

func (m *ManagerImpl) Allocate(node *schedulercache.NodeInfo, attrs *lifecycle.PodAdmitAttributes) error

Allocate is the call that you can use to allocate a set of devices from the registered device plugins.

func (*ManagerImpl) Devices

func (m *ManagerImpl) Devices() map[string][]pluginapi.Device

Devices is the map of devices that are known by the Device Plugin manager with the kind of the devices as key

func (*ManagerImpl) GetCapacity

func (m *ManagerImpl) GetCapacity() (v1.ResourceList, v1.ResourceList, []string)

GetCapacity is expected to be called when Kubelet updates its node status. The first returned variable contains the registered device plugin resource capacity. The second returned variable contains the registered device plugin resource allocatable. The third returned variable contains previously registered resources that are no longer active. Kubelet uses this information to update resource capacity/allocatable in its node status. After the call, device plugin can remove the inactive resources from its internal list as the change is already reflected in Kubelet node status. Note in the special case after Kubelet restarts, device plugin resource capacities can temporarily drop to zero till corresponding device plugins re-register. This is OK because cm.UpdatePluginResource() run during predicate Admit guarantees we adjust nodeinfo capacity for already allocated pods so that they can continue to run. However, new pods requiring device plugin resources will not be scheduled till device plugin re-registers.

func (*ManagerImpl) GetDeviceRunContainerOptions

func (m *ManagerImpl) GetDeviceRunContainerOptions(pod *v1.Pod, container *v1.Container) (*DeviceRunContainerOptions, error)

GetDeviceRunContainerOptions checks whether we have cached containerDevices for the passed-in <pod, container> and returns its DeviceRunContainerOptions for the found one. An empty struct is returned in case no cached state is found.

func (*ManagerImpl) Register

func (m *ManagerImpl) Register(ctx context.Context, r *pluginapi.RegisterRequest) (*pluginapi.Empty, error)

Register registers a device plugin.

func (*ManagerImpl) Start

func (m *ManagerImpl) Start(activePods ActivePodsFunc, sourcesReady config.SourcesReady) error

Start starts the Device Plugin Manager amd start initialization of podDevices and allocatedDevices information from checkpoint-ed state and starts device plugin registration service.

func (*ManagerImpl) Stop

func (m *ManagerImpl) Stop() error

Stop is the function that can stop the gRPC server. Can be called concurrently, more than once, and is safe to call without a prior Start.

type ManagerStub

type ManagerStub struct{}

ManagerStub provides a simple stub implementation for the Device Manager.

func NewManagerStub

func NewManagerStub() (*ManagerStub, error)

NewManagerStub creates a ManagerStub.

func (*ManagerStub) Allocate

func (h *ManagerStub) Allocate(node *schedulercache.NodeInfo, attrs *lifecycle.PodAdmitAttributes) error

Allocate simply returns nil.

func (*ManagerStub) Devices

func (h *ManagerStub) Devices() map[string][]pluginapi.Device

Devices returns an empty map.

func (*ManagerStub) GetCapacity

func (h *ManagerStub) GetCapacity() (v1.ResourceList, v1.ResourceList, []string)

GetCapacity simply returns nil capacity and empty removed resource list.

func (*ManagerStub) GetDeviceRunContainerOptions

func (h *ManagerStub) GetDeviceRunContainerOptions(pod *v1.Pod, container *v1.Container) (*DeviceRunContainerOptions, error)

GetDeviceRunContainerOptions simply returns nil.

func (*ManagerStub) Start

func (h *ManagerStub) Start(activePods ActivePodsFunc, sourcesReady config.SourcesReady) error

Start simply returns nil.

func (*ManagerStub) Stop

func (h *ManagerStub) Stop() error

Stop simply returns nil.

type Stub

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

Stub implementation for DevicePlugin.

func NewDevicePluginStub

func NewDevicePluginStub(devs []*pluginapi.Device, socket string) *Stub

NewDevicePluginStub returns an initialized DevicePlugin Stub.

func (*Stub) Allocate

func (m *Stub) Allocate(ctx context.Context, r *pluginapi.AllocateRequest) (*pluginapi.AllocateResponse, error)

Allocate does a mock allocation

func (*Stub) GetDevicePluginOptions

func (m *Stub) GetDevicePluginOptions(ctx context.Context, e *pluginapi.Empty) (*pluginapi.DevicePluginOptions, error)

GetDevicePluginOptions returns DevicePluginOptions settings for the device plugin.

func (*Stub) ListAndWatch

func (m *Stub) ListAndWatch(e *pluginapi.Empty, s pluginapi.DevicePlugin_ListAndWatchServer) error

ListAndWatch lists devices and update that list according to the Update call

func (*Stub) PreStartContainer

func (m *Stub) PreStartContainer(ctx context.Context, r *pluginapi.PreStartContainerRequest) (*pluginapi.PreStartContainerResponse, error)

PreStartContainer resets the devices received

func (*Stub) Register

func (m *Stub) Register(kubeletEndpoint, resourceName string, preStartContainerFlag bool) error

Register registers the device plugin for the given resourceName with Kubelet.

func (*Stub) SetAllocFunc

func (m *Stub) SetAllocFunc(f stubAllocFunc)

SetAllocFunc sets allocFunc of the device plugin

func (*Stub) Start

func (m *Stub) Start() error

Start starts the gRPC server of the device plugin. Can only be called once.

func (*Stub) Stop

func (m *Stub) Stop() error

Stop stops the gRPC server. Can be called without a prior Start and more than once. Not safe to be called concurrently by different goroutines!

func (*Stub) Update

func (m *Stub) Update(devs []*pluginapi.Device)

Update allows the device plugin to send new devices through ListAndWatch