Documentation

Index

Constants

View Source
const (
	// Name is the name of the plugin used in the plugin registry and configurations.
	Name = "VolumeZone"

	// ErrReasonConflict is used for NoVolumeZoneConflict predicate error.
	ErrReasonConflict = "node(s) had no available volume zone"
)

Variables

This section is empty.

Functions

func New

    New initializes a new plugin and returns it.

    Types

    type VolumeZone

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

      VolumeZone is a plugin that checks volume zone.

      func (*VolumeZone) Filter

      func (pl *VolumeZone) Filter(ctx context.Context, _ *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, given that some volumes may have zone scheduling constraints. The requirement is that any volume zone-labels must match the equivalent zone-labels on the node. It is OK for the node to have more zone-label constraints (for example, a hypothetical replicated volume might allow region-wide access)

        Currently this is only supported with PersistentVolumeClaims, and looks to the labels only on the bound PersistentVolume.

        Working with volumes declared inline in the pod specification (i.e. not using a PersistentVolume) is likely to be harder, as it would require determining the zone of a volume during scheduling, and that is likely to require calling out to the cloud provider. It seems that we are moving away from inline volume declarations anyway.

        func (*VolumeZone) Name

        func (pl *VolumeZone) Name() string

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

          Source Files