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k8s.io/kubernetes / pkg / scheduler / framework / plugins / volumerestrictions

package volumerestrictions

v1.18.5
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Published: Jun 26, 2020 | License: Apache-2.0 | Module: k8s.io/kubernetes

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Constants

const (
	// ErrReasonDiskConflict is used for NoDiskConflict predicate error.
	ErrReasonDiskConflict = "node(s) had no available disk"
)
const Name = "VolumeRestrictions"

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

func New

func New(_ *runtime.Unknown, _ framework.FrameworkHandle) (framework.Plugin, error)

New initializes a new plugin and returns it.

type VolumeRestrictions

type VolumeRestrictions struct{}

VolumeRestrictions is a plugin that checks volume restrictions.

func (*VolumeRestrictions) Filter

func (pl *VolumeRestrictions) Filter(ctx context.Context, _ *framework.CycleState, pod *v1.Pod, nodeInfo *nodeinfo.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

func (*VolumeRestrictions) Name

func (pl *VolumeRestrictions) Name() string

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

Documentation was rendered with GOOS=linux and GOARCH=amd64.

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