volumerestrictions

Documentation

Index

• Constants
• func New(_ context.Context, _ runtime.Object, handle framework.Handle, ...) (framework.Plugin, error)
• type VolumeRestrictions
  • func (pl *VolumeRestrictions) AddPod(ctx context.Context, cycleState *framework.CycleState, podToSchedule *v1.Pod, ...) *framework.Status
  • func (pl *VolumeRestrictions) EventsToRegister(_ context.Context) ([]framework.ClusterEventWithHint, error)
  • func (pl *VolumeRestrictions) Filter(ctx context.Context, cycleState *framework.CycleState, pod *v1.Pod, ...) *framework.Status
  • func (pl *VolumeRestrictions) Name() string
  • func (pl *VolumeRestrictions) PreFilter(ctx context.Context, cycleState *framework.CycleState, pod *v1.Pod) (*framework.PreFilterResult, *framework.Status)
  • func (pl *VolumeRestrictions) PreFilterExtensions() framework.PreFilterExtensions
  • func (pl *VolumeRestrictions) RemovePod(ctx context.Context, cycleState *framework.CycleState, podToSchedule *v1.Pod, ...) *framework.Status

Constants

const (
	// Name is the name of the plugin used in the plugin registry and configurations.
	Name = names.VolumeRestrictions

	// ErrReasonDiskConflict is used for NoDiskConflict predicate error.
	ErrReasonDiskConflict = "node(s) had no available disk"
	// ErrReasonReadWriteOncePodConflict is used when a pod is found using the same PVC with the ReadWriteOncePod access mode.
	ErrReasonReadWriteOncePodConflict = "node has pod using PersistentVolumeClaim with the same name and ReadWriteOncePod access mode"
)

Functions

func New

func New(_ context.Context, _ runtime.Object, handle framework.Handle, fts feature.Features) (framework.Plugin, error)

New initializes a new plugin and returns it.

Types

type VolumeRestrictions

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

VolumeRestrictions is a plugin that checks volume restrictions.

func (*VolumeRestrictions) AddPod

func (pl *VolumeRestrictions) AddPod(ctx context.Context, cycleState *framework.CycleState, podToSchedule *v1.Pod, podInfoToAdd *framework.PodInfo, nodeInfo *framework.NodeInfo) *framework.Status

AddPod from pre-computed data in cycleState.

func (*VolumeRestrictions) EventsToRegister

func (pl *VolumeRestrictions) EventsToRegister(_ context.Context) ([]framework.ClusterEventWithHint, error)

EventsToRegister returns the possible events that may make a Pod failed by this plugin schedulable.

func (*VolumeRestrictions) Filter

func (pl *VolumeRestrictions) Filter(ctx context.Context, cycleState *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, and those that are already mounted. If there is already a volume mounted on that node, another pod that uses the same volume can't be scheduled there. This is GCE, Amazon EBS, ISCSI and Ceph RBD specific for now: - GCE PD allows multiple mounts as long as they're all read-only - AWS EBS forbids any two pods mounting the same volume ID - Ceph RBD forbids if any two pods share at least same monitor, and match pool and image, and the image is read-only - ISCSI forbids if any two pods share at least same IQN and ISCSI volume is read-only If the pod uses PVCs with the ReadWriteOncePod access mode, it evaluates if these PVCs are already in-use and if preemption will help.

func (*VolumeRestrictions) Name

func (pl *VolumeRestrictions) Name() string

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

func (*VolumeRestrictions) PreFilter

func (pl *VolumeRestrictions) PreFilter(ctx context.Context, cycleState *framework.CycleState, pod *v1.Pod) (*framework.PreFilterResult, *framework.Status)

PreFilter computes and stores cycleState containing details for enforcing ReadWriteOncePod.

func (*VolumeRestrictions) PreFilterExtensions

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

PreFilterExtensions returns prefilter extensions, pod add and remove.

func (*VolumeRestrictions) RemovePod

func (pl *VolumeRestrictions) RemovePod(ctx context.Context, cycleState *framework.CycleState, podToSchedule *v1.Pod, podInfoToRemove *framework.PodInfo, nodeInfo *framework.NodeInfo) *framework.Status

RemovePod from pre-computed data in cycleState.