devicemanager

package
Version: v1.24.0 Latest Latest
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Published: May 3, 2022 License: Apache-2.0 Imports: 35 Imported by: 12

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Functions

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Types

type ActivePodsFunc

type ActivePodsFunc func() []*v1.Pod

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

type DeviceInstances added in v1.21.0

type DeviceInstances map[string]pluginapi.Device

DeviceInstances is a mapping device name -> plugin device data

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

	// Allocate configures and assigns devices to a container in a pod. 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).
	Allocate(pod *v1.Pod, container *v1.Container) error

	// UpdatePluginResources updates node resources based on devices already
	// allocated to pods. The node object is provided for the device manager to
	// update the node capacity to reflect the currently available devices.
	UpdatePluginResources(node *schedulerframework.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)
	GetWatcherHandler() cache.PluginHandler

	// GetDevices returns information about the devices assigned to pods and containers
	GetDevices(podUID, containerName string) ResourceDeviceInstances

	// GetAllocatableDevices returns information about all the devices known to the manager
	GetAllocatableDevices() ResourceDeviceInstances

	// ShouldResetExtendedResourceCapacity returns whether the extended resources should be reset or not,
	// depending on the checkpoint file availability. Absence of the checkpoint file strongly indicates
	// the node has been recreated.
	ShouldResetExtendedResourceCapacity() bool

	// TopologyManager HintProvider provider indicates the Device Manager implements the Topology Manager Interface
	// and is consulted to make Topology aware resource alignments
	GetTopologyHints(pod *v1.Pod, container *v1.Container) map[string][]topologymanager.TopologyHint

	// TopologyManager HintProvider provider indicates the Device Manager implements the Topology Manager Interface
	// and is consulted to make Topology aware resource alignments per Pod
	GetPodTopologyHints(pod *v1.Pod) map[string][]topologymanager.TopologyHint

	// UpdateAllocatedDevices frees any Devices that are bound to terminated pods.
	UpdateAllocatedDevices()
}

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(topology []cadvisorapi.Node, topologyAffinityStore topologymanager.Store) (*ManagerImpl, error)

NewManagerImpl creates a new manager.

func (*ManagerImpl) Allocate

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

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

func (*ManagerImpl) DeRegisterPlugin added in v1.12.0

func (m *ManagerImpl) DeRegisterPlugin(pluginName string)

DeRegisterPlugin deregisters the plugin TODO work on the behavior for deregistering plugins e.g: Should we delete the resource

func (*ManagerImpl) GetAllocatableDevices added in v1.21.0

func (m *ManagerImpl) GetAllocatableDevices() ResourceDeviceInstances

GetAllocatableDevices returns information about all the healthy devices known to the manager

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) GetDevices added in v1.13.0

func (m *ManagerImpl) GetDevices(podUID, containerName string) ResourceDeviceInstances

GetDevices returns the devices used by the specified container

func (*ManagerImpl) GetPodTopologyHints added in v1.20.0

func (m *ManagerImpl) GetPodTopologyHints(pod *v1.Pod) map[string][]topologymanager.TopologyHint

GetPodTopologyHints implements the topologymanager.HintProvider Interface which ensures the Device Manager is consulted when Topology Aware Hints for Pod are created.

func (*ManagerImpl) GetTopologyHints added in v1.16.0

func (m *ManagerImpl) GetTopologyHints(pod *v1.Pod, container *v1.Container) map[string][]topologymanager.TopologyHint

GetTopologyHints implements the TopologyManager HintProvider Interface which ensures the Device Manager is consulted when Topology Aware Hints for each container are created.

func (*ManagerImpl) GetWatcherHandler added in v1.12.0

func (m *ManagerImpl) GetWatcherHandler() cache.PluginHandler

GetWatcherHandler returns the plugin handler

func (*ManagerImpl) Register

Register registers a device plugin.

func (*ManagerImpl) RegisterPlugin added in v1.12.0

func (m *ManagerImpl) RegisterPlugin(pluginName string, endpoint string, versions []string) error

RegisterPlugin starts the endpoint and registers it TODO: Start the endpoint and wait for the First ListAndWatch call

before registering the plugin

func (*ManagerImpl) ShouldResetExtendedResourceCapacity added in v1.14.9

func (m *ManagerImpl) ShouldResetExtendedResourceCapacity() bool

ShouldResetExtendedResourceCapacity returns whether the extended resources should be zeroed or not, depending on whether the node has been recreated. Absence of the checkpoint file strongly indicates the node has been recreated.

func (*ManagerImpl) Start

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

Start starts the Device Plugin Manager and start initialization of podDevices and allocatedDevices information from checkpointed 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.

func (*ManagerImpl) UpdateAllocatedDevices added in v1.16.11

func (m *ManagerImpl) UpdateAllocatedDevices()

UpdateAllocatedDevices frees any Devices that are bound to terminated pods.

func (*ManagerImpl) UpdatePluginResources added in v1.18.0

func (m *ManagerImpl) UpdatePluginResources(node *schedulerframework.NodeInfo, attrs *lifecycle.PodAdmitAttributes) error

UpdatePluginResources updates node resources based on devices already allocated to pods.

func (*ManagerImpl) ValidatePlugin added in v1.12.0

func (m *ManagerImpl) ValidatePlugin(pluginName string, endpoint string, versions []string) error

ValidatePlugin validates a plugin if the version is correct and the name has the format of an extended resource

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(pod *v1.Pod, container *v1.Container) error

Allocate simply returns nil.

func (*ManagerStub) GetAllocatableDevices added in v1.21.0

func (h *ManagerStub) GetAllocatableDevices() ResourceDeviceInstances

GetAllocatableDevices returns nothing

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) GetDevices added in v1.13.0

func (h *ManagerStub) GetDevices(_, _ string) ResourceDeviceInstances

GetDevices returns nil

func (*ManagerStub) GetPodTopologyHints added in v1.20.0

func (h *ManagerStub) GetPodTopologyHints(pod *v1.Pod) map[string][]topologymanager.TopologyHint

GetPodTopologyHints returns an empty TopologyHint map

func (*ManagerStub) GetTopologyHints added in v1.16.0

func (h *ManagerStub) GetTopologyHints(pod *v1.Pod, container *v1.Container) map[string][]topologymanager.TopologyHint

GetTopologyHints returns an empty TopologyHint map

func (*ManagerStub) GetWatcherHandler added in v1.12.0

func (h *ManagerStub) GetWatcherHandler() cache.PluginHandler

GetWatcherHandler returns plugin watcher interface

func (*ManagerStub) ShouldResetExtendedResourceCapacity added in v1.14.9

func (h *ManagerStub) ShouldResetExtendedResourceCapacity() bool

ShouldResetExtendedResourceCapacity returns false

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.

func (*ManagerStub) UpdateAllocatedDevices added in v1.16.11

func (h *ManagerStub) UpdateAllocatedDevices()

UpdateAllocatedDevices returns nothing

func (*ManagerStub) UpdatePluginResources added in v1.18.0

func (h *ManagerStub) UpdatePluginResources(node *schedulerframework.NodeInfo, attrs *lifecycle.PodAdmitAttributes) error

UpdatePluginResources simply returns nil.

type PodReusableDevices added in v1.18.0

type PodReusableDevices map[string]map[string]sets.String

PodReusableDevices is a map by pod name of devices to reuse.

type ResourceDeviceInstances added in v1.21.0

type ResourceDeviceInstances map[string]DeviceInstances

ResourceDeviceInstances is a mapping resource name -> DeviceInstances

func NewResourceDeviceInstances added in v1.21.0

func NewResourceDeviceInstances() ResourceDeviceInstances

func (ResourceDeviceInstances) Clone added in v1.21.0

func (ResourceDeviceInstances) Filter added in v1.23.0

Filter takes a condition set expressed as map[string]sets.String and returns a new ResourceDeviceInstances with only the devices matching the condition set.

type Stub

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

Stub implementation for DevicePlugin.

func NewDevicePluginStub

func NewDevicePluginStub(devs []*pluginapi.Device, socket string, name string, preStartContainerFlag bool, getPreferredAllocationFlag bool) *Stub

NewDevicePluginStub returns an initialized DevicePlugin Stub.

func (*Stub) Allocate

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) GetInfo added in v1.12.0

GetInfo is the RPC which return pluginInfo

func (*Stub) GetPreferredAllocation added in v1.19.0

GetPreferredAllocation gets the preferred allocation from a set of available devices

func (*Stub) ListAndWatch

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

func (*Stub) NotifyRegistrationStatus added in v1.12.0

func (m *Stub) NotifyRegistrationStatus(ctx context.Context, status *watcherapi.RegistrationStatus) (*watcherapi.RegistrationStatusResponse, error)

NotifyRegistrationStatus receives the registration notification from watcher

func (*Stub) PreStartContainer

PreStartContainer resets the devices received

func (*Stub) Register

func (m *Stub) Register(kubeletEndpoint, resourceName string, pluginSockDir string) 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) SetGetPreferredAllocFunc added in v1.19.0

func (m *Stub) SetGetPreferredAllocFunc(f stubGetPreferredAllocFunc)

SetGetPreferredAllocFunc 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

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