volumebinding

Documentation

Index

• Constants
• func New(plArgs runtime.Object, fh framework.Handle) (framework.Plugin, error)
• type VolumeBinding
  • func (pl *VolumeBinding) Filter(ctx context.Context, cs *framework.CycleState, pod *v1.Pod, ...) *framework.Status
  • func (pl *VolumeBinding) Name() string
  • func (pl *VolumeBinding) PreBind(ctx context.Context, cs *framework.CycleState, pod *v1.Pod, nodeName string) *framework.Status
  • func (pl *VolumeBinding) PreFilter(ctx context.Context, state *framework.CycleState, pod *v1.Pod) *framework.Status
  • func (pl *VolumeBinding) PreFilterExtensions() framework.PreFilterExtensions
  • func (pl *VolumeBinding) Reserve(ctx context.Context, cs *framework.CycleState, pod *v1.Pod, nodeName string) *framework.Status
  • func (pl *VolumeBinding) Unreserve(ctx context.Context, cs *framework.CycleState, pod *v1.Pod, nodeName string)

Constants

const (
	// DefaultBindTimeoutSeconds defines the default bind timeout in seconds
	DefaultBindTimeoutSeconds = 600
)

const Name = "VolumeBinding"

Name is the name of the plugin used in Registry and configurations.

Functions

func New

func New(plArgs runtime.Object, fh framework.Handle) (framework.Plugin, error)

New initializes a new plugin and returns it.

Types

type VolumeBinding

type VolumeBinding struct {
	Binder                               scheduling.SchedulerVolumeBinder
	PVCLister                            corelisters.PersistentVolumeClaimLister
	GenericEphemeralVolumeFeatureEnabled bool
}

VolumeBinding is a plugin that binds pod volumes in scheduling. In the Filter phase, pod binding cache is created for the pod and used in Reserve and PreBind phases.

func (*VolumeBinding) Filter

func (pl *VolumeBinding) Filter(ctx context.Context, cs *framework.CycleState, pod *v1.Pod, nodeInfo *framework.NodeInfo) *framework.Status

Filter invoked at the filter extension point. It evaluates if a pod can fit due to the volumes it requests, for both bound and unbound PVCs.

For PVCs that are bound, then it checks that the corresponding PV's node affinity is satisfied by the given node.

For PVCs that are unbound, it tries to find available PVs that can satisfy the PVC requirements and that the PV node affinity is satisfied by the given node.

If storage capacity tracking is enabled, then enough space has to be available for the node and volumes that still need to be created.

The predicate returns true if all bound PVCs have compatible PVs with the node, and if all unbound PVCs can be matched with an available and node-compatible PV.

func (*VolumeBinding) Name

func (pl *VolumeBinding) Name() string

Name returns name of the plugin. It is used in logs, etc.

func (*VolumeBinding) PreBind

func (pl *VolumeBinding) PreBind(ctx context.Context, cs *framework.CycleState, pod *v1.Pod, nodeName string) *framework.Status

PreBind will make the API update with the assumed bindings and wait until the PV controller has completely finished the binding operation.

If binding errors, times out or gets undone, then an error will be returned to retry scheduling.

func (*VolumeBinding) PreFilter

func (pl *VolumeBinding) PreFilter(ctx context.Context, state *framework.CycleState, pod *v1.Pod) *framework.Status

PreFilter invoked at the prefilter extension point to check if pod has all immediate PVCs bound. If not all immediate PVCs are bound, an UnschedulableAndUnresolvable is returned.

func (*VolumeBinding) PreFilterExtensions

func (pl *VolumeBinding) PreFilterExtensions() framework.PreFilterExtensions

PreFilterExtensions returns prefilter extensions, pod add and remove.

func (*VolumeBinding) Reserve

func (pl *VolumeBinding) Reserve(ctx context.Context, cs *framework.CycleState, pod *v1.Pod, nodeName string) *framework.Status

Reserve reserves volumes of pod and saves binding status in cycle state.

func (*VolumeBinding) Unreserve

func (pl *VolumeBinding) Unreserve(ctx context.Context, cs *framework.CycleState, pod *v1.Pod, nodeName string)

Unreserve clears assumed PV and PVC cache. It's idempotent, and does nothing if no cache found for the given pod.