predicates

package
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 Go to latest Published: Jan 13, 2021 License: Apache-2.0 Imports: 33 Imported by: 0

Documentation

Index

Examples

Constants

View Source 
const (
	// MatchInterPodAffinityPred defines the name of predicate MatchInterPodAffinity.
	MatchInterPodAffinityPred = "MatchInterPodAffinity"
	// CheckVolumeBindingPred defines the name of predicate CheckVolumeBinding.
	CheckVolumeBindingPred = "CheckVolumeBinding"
	// GeneralPred defines the name of predicate GeneralPredicates.
	GeneralPred = "GeneralPredicates"
	// HostNamePred defines the name of predicate HostName.
	HostNamePred = "HostName"
	// PodFitsHostPortsPred defines the name of predicate PodFitsHostPorts.
	PodFitsHostPortsPred = "PodFitsHostPorts"
	// MatchNodeSelectorPred defines the name of predicate MatchNodeSelector.
	MatchNodeSelectorPred = "MatchNodeSelector"
	// PodFitsResourcesPred defines the name of predicate PodFitsResources.
	PodFitsResourcesPred = "PodFitsResources"
	// NoDiskConflictPred defines the name of predicate NoDiskConflict.
	NoDiskConflictPred = "NoDiskConflict"
	// PodToleratesNodeTaintsPred defines the name of predicate PodToleratesNodeTaints.
	PodToleratesNodeTaintsPred = "PodToleratesNodeTaints"
	// CheckNodeUnschedulablePred defines the name of predicate CheckNodeUnschedulablePredicate.
	CheckNodeUnschedulablePred = "CheckNodeUnschedulable"
	// PodToleratesNodeNoExecuteTaintsPred defines the name of predicate PodToleratesNodeNoExecuteTaints.
	PodToleratesNodeNoExecuteTaintsPred = "PodToleratesNodeNoExecuteTaints"
	// CheckNodeLabelPresencePred defines the name of predicate CheckNodeLabelPresence.
	CheckNodeLabelPresencePred = "CheckNodeLabelPresence"
	// CheckServiceAffinityPred defines the name of predicate checkServiceAffinity.
	CheckServiceAffinityPred = "CheckServiceAffinity"
	// MaxEBSVolumeCountPred defines the name of predicate MaxEBSVolumeCount.
	// DEPRECATED
	// All cloudprovider specific predicates are deprecated in favour of MaxCSIVolumeCountPred.
	MaxEBSVolumeCountPred = "MaxEBSVolumeCount"
	// MaxGCEPDVolumeCountPred defines the name of predicate MaxGCEPDVolumeCount.
	// DEPRECATED
	// All cloudprovider specific predicates are deprecated in favour of MaxCSIVolumeCountPred.
	MaxGCEPDVolumeCountPred = "MaxGCEPDVolumeCount"
	// MaxAzureDiskVolumeCountPred defines the name of predicate MaxAzureDiskVolumeCount.
	// DEPRECATED
	// All cloudprovider specific predicates are deprecated in favour of MaxCSIVolumeCountPred.
	MaxAzureDiskVolumeCountPred = "MaxAzureDiskVolumeCount"
	// MaxCinderVolumeCountPred defines the name of predicate MaxCinderDiskVolumeCount.
	// DEPRECATED
	// All cloudprovider specific predicates are deprecated in favour of MaxCSIVolumeCountPred.
	MaxCinderVolumeCountPred = "MaxCinderVolumeCount"
	// MaxCSIVolumeCountPred defines the predicate that decides how many CSI volumes should be attached.
	MaxCSIVolumeCountPred = "MaxCSIVolumeCountPred"
	// NoVolumeZoneConflictPred defines the name of predicate NoVolumeZoneConflict.
	NoVolumeZoneConflictPred = "NoVolumeZoneConflict"
	// EvenPodsSpreadPred defines the name of predicate EvenPodsSpread.
	EvenPodsSpreadPred = "EvenPodsSpread"

	// DefaultMaxGCEPDVolumes defines the maximum number of PD Volumes for GCE.
	// GCE instances can have up to 16 PD volumes attached.
	DefaultMaxGCEPDVolumes = 16
	// DefaultMaxAzureDiskVolumes defines the maximum number of PD Volumes for Azure.
	// Larger Azure VMs can actually have much more disks attached.
	// TODO We should determine the max based on VM size
	DefaultMaxAzureDiskVolumes = 16

	// KubeMaxPDVols defines the maximum number of PD Volumes per kubelet.
	KubeMaxPDVols = "KUBE_MAX_PD_VOLS"

	// EBSVolumeFilterType defines the filter name for EBSVolumeFilter.
	EBSVolumeFilterType = "EBS"
	// GCEPDVolumeFilterType defines the filter name for GCEPDVolumeFilter.
	GCEPDVolumeFilterType = "GCE"
	// AzureDiskVolumeFilterType defines the filter name for AzureDiskVolumeFilter.
	AzureDiskVolumeFilterType = "AzureDisk"
	// CinderVolumeFilterType defines the filter name for CinderVolumeFilter.
	CinderVolumeFilterType = "Cinder"
)

Variables

View Source 
var (

	// ErrDiskConflict is used for NoDiskConflict predicate error.
	ErrDiskConflict = newPredicateFailureError("NoDiskConflict", "node(s) had no available disk")
	// ErrVolumeZoneConflict is used for NoVolumeZoneConflict predicate error.
	ErrVolumeZoneConflict = newPredicateFailureError("NoVolumeZoneConflict", "node(s) had no available volume zone")
	// ErrNodeSelectorNotMatch is used for MatchNodeSelector predicate error.
	ErrNodeSelectorNotMatch = newPredicateFailureError("MatchNodeSelector", "node(s) didn't match node selector")
	// ErrPodAffinityNotMatch is used for MatchInterPodAffinity predicate error.
	ErrPodAffinityNotMatch = newPredicateFailureError("MatchInterPodAffinity", "node(s) didn't match pod affinity/anti-affinity")
	// ErrPodAffinityRulesNotMatch is used for PodAffinityRulesNotMatch predicate error.
	ErrPodAffinityRulesNotMatch = newPredicateFailureError("PodAffinityRulesNotMatch", "node(s) didn't match pod affinity rules")
	// ErrPodAntiAffinityRulesNotMatch is used for PodAntiAffinityRulesNotMatch predicate error.
	ErrPodAntiAffinityRulesNotMatch = newPredicateFailureError("PodAntiAffinityRulesNotMatch", "node(s) didn't match pod anti-affinity rules")
	// ErrExistingPodsAntiAffinityRulesNotMatch is used for ExistingPodsAntiAffinityRulesNotMatch predicate error.
	ErrExistingPodsAntiAffinityRulesNotMatch = newPredicateFailureError("ExistingPodsAntiAffinityRulesNotMatch", "node(s) didn't satisfy existing pods anti-affinity rules")
	// ErrTaintsTolerationsNotMatch is used for PodToleratesNodeTaints predicate error.
	ErrTaintsTolerationsNotMatch = newPredicateFailureError("PodToleratesNodeTaints", "node(s) had taints that the pod didn't tolerate")
	// ErrPodNotMatchHostName is used for HostName predicate error.
	ErrPodNotMatchHostName = newPredicateFailureError("HostName", "node(s) didn't match the requested hostname")
	// ErrPodNotFitsHostPorts is used for PodFitsHostPorts predicate error.
	ErrPodNotFitsHostPorts = newPredicateFailureError("PodFitsHostPorts", "node(s) didn't have free ports for the requested pod ports")
	// ErrNodeLabelPresenceViolated is used for CheckNodeLabelPresence predicate error.
	ErrNodeLabelPresenceViolated = newPredicateFailureError("CheckNodeLabelPresence", "node(s) didn't have the requested labels")
	// ErrServiceAffinityViolated is used for CheckServiceAffinity predicate error.
	ErrServiceAffinityViolated = newPredicateFailureError("CheckServiceAffinity", "node(s) didn't match service affinity")
	// ErrMaxVolumeCountExceeded is used for MaxVolumeCount predicate error.
	ErrMaxVolumeCountExceeded = newPredicateFailureError("MaxVolumeCount", "node(s) exceed max volume count")
	// ErrNodeUnderMemoryPressure is used for NodeUnderMemoryPressure predicate error.
	ErrNodeUnderMemoryPressure = newPredicateFailureError("NodeUnderMemoryPressure", "node(s) had memory pressure")
	// ErrNodeUnderDiskPressure is used for NodeUnderDiskPressure predicate error.
	ErrNodeUnderDiskPressure = newPredicateFailureError("NodeUnderDiskPressure", "node(s) had disk pressure")
	// ErrNodeUnderPIDPressure is used for NodeUnderPIDPressure predicate error.
	ErrNodeUnderPIDPressure = newPredicateFailureError("NodeUnderPIDPressure", "node(s) had pid pressure")
	// ErrNodeNotReady is used for NodeNotReady predicate error.
	ErrNodeNotReady = newPredicateFailureError("NodeNotReady", "node(s) were not ready")
	// ErrNodeNetworkUnavailable is used for NodeNetworkUnavailable predicate error.
	ErrNodeNetworkUnavailable = newPredicateFailureError("NodeNetworkUnavailable", "node(s) had unavailable network")
	// ErrNodeUnschedulable is used for NodeUnschedulable predicate error.
	ErrNodeUnschedulable = newPredicateFailureError("NodeUnschedulable", "node(s) were unschedulable")
	// ErrNodeUnknownCondition is used for NodeUnknownCondition predicate error.
	ErrNodeUnknownCondition = newPredicateFailureError("NodeUnknownCondition", "node(s) had unknown conditions")
	// ErrVolumeNodeConflict is used for VolumeNodeAffinityConflict predicate error.
	ErrVolumeNodeConflict = newPredicateFailureError("VolumeNodeAffinityConflict", "node(s) had volume node affinity conflict")
	// ErrVolumeBindConflict is used for VolumeBindingNoMatch predicate error.
	ErrVolumeBindConflict = newPredicateFailureError("VolumeBindingNoMatch", "node(s) didn't find available persistent volumes to bind")
	// ErrTopologySpreadConstraintsNotMatch is used for EvenPodsSpread predicate error.
	ErrTopologySpreadConstraintsNotMatch = newPredicateFailureError("EvenPodsSpreadNotMatch", "node(s) didn't match pod topology spread constraints")
	// ErrFakePredicate is used for test only. The fake predicates returning false also returns error
	// as ErrFakePredicate.
	ErrFakePredicate = newPredicateFailureError("FakePredicateError", "Nodes failed the fake predicate")
)
View Source 
var AzureDiskVolumeFilter = VolumeFilter{
	FilterVolume: func(vol *v1.Volume) (string, bool) {
		if vol.AzureDisk != nil {
			return vol.AzureDisk.DiskName, true
		}
		return "", false
	},

	FilterPersistentVolume: func(pv *v1.PersistentVolume) (string, bool) {
		if pv.Spec.AzureDisk != nil {
			return pv.Spec.AzureDisk.DiskName, true
		}
		return "", false
	},

	MatchProvisioner: func(sc *storage.StorageClass) (relevant bool) {
		if sc.Provisioner == csilibplugins.AzureDiskInTreePluginName {
			return true
		}
		return false
	},

	IsMigrated: func(csiNode *storage.CSINode) bool {
		return isCSIMigrationOn(csiNode, csilibplugins.AzureDiskInTreePluginName)
	},
}

AzureDiskVolumeFilter is a VolumeFilter for filtering Azure Disk Volumes.

View Source 
var CinderVolumeFilter = VolumeFilter{
	FilterVolume: func(vol *v1.Volume) (string, bool) {
		if vol.Cinder != nil {
			return vol.Cinder.VolumeID, true
		}
		return "", false
	},

	FilterPersistentVolume: func(pv *v1.PersistentVolume) (string, bool) {
		if pv.Spec.Cinder != nil {
			return pv.Spec.Cinder.VolumeID, true
		}
		return "", false
	},

	MatchProvisioner: func(sc *storage.StorageClass) (relevant bool) {
		if sc.Provisioner == csilibplugins.CinderInTreePluginName {
			return true
		}
		return false
	},

	IsMigrated: func(csiNode *storage.CSINode) bool {
		return isCSIMigrationOn(csiNode, csilibplugins.CinderInTreePluginName)
	},
}

CinderVolumeFilter is a VolumeFilter for filtering Cinder Volumes. It will be deprecated once Openstack cloudprovider has been removed from in-tree.

View Source 
var EBSVolumeFilter = VolumeFilter{
	FilterVolume: func(vol *v1.Volume) (string, bool) {
		if vol.AWSElasticBlockStore != nil {
			return vol.AWSElasticBlockStore.VolumeID, true
		}
		return "", false
	},

	FilterPersistentVolume: func(pv *v1.PersistentVolume) (string, bool) {
		if pv.Spec.AWSElasticBlockStore != nil {
			return pv.Spec.AWSElasticBlockStore.VolumeID, true
		}
		return "", false
	},

	MatchProvisioner: func(sc *storage.StorageClass) (relevant bool) {
		if sc.Provisioner == csilibplugins.AWSEBSInTreePluginName {
			return true
		}
		return false
	},

	IsMigrated: func(csiNode *storage.CSINode) bool {
		return isCSIMigrationOn(csiNode, csilibplugins.AWSEBSInTreePluginName)
	},
}

EBSVolumeFilter is a VolumeFilter for filtering AWS ElasticBlockStore Volumes.

View Source 
var GCEPDVolumeFilter = VolumeFilter{
	FilterVolume: func(vol *v1.Volume) (string, bool) {
		if vol.GCEPersistentDisk != nil {
			return vol.GCEPersistentDisk.PDName, true
		}
		return "", false
	},

	FilterPersistentVolume: func(pv *v1.PersistentVolume) (string, bool) {
		if pv.Spec.GCEPersistentDisk != nil {
			return pv.Spec.GCEPersistentDisk.PDName, true
		}
		return "", false
	},

	MatchProvisioner: func(sc *storage.StorageClass) (relevant bool) {
		if sc.Provisioner == csilibplugins.GCEPDInTreePluginName {
			return true
		}
		return false
	},

	IsMigrated: func(csiNode *storage.CSINode) bool {
		return isCSIMigrationOn(csiNode, csilibplugins.GCEPDInTreePluginName)
	},
}

GCEPDVolumeFilter is a VolumeFilter for filtering GCE PersistentDisk Volumes.

Functions

func AddUnsetLabelsToMap 

func AddUnsetLabelsToMap(aL map[string]string, labelsToAdd []string, labelSet labels.Set)

AddUnsetLabelsToMap backfills missing values with values we find in a map.

func CreateSelectorFromLabels 

func CreateSelectorFromLabels(aL map[string]string) labels.Selector

CreateSelectorFromLabels is used to define a selector that corresponds to the keys in a map.

func FilterPodsByNamespace 

func FilterPodsByNamespace(pods []*v1.Pod, ns string) []*v1.Pod

FilterPodsByNamespace filters pods outside a namespace from the given list.

func FindLabelsInSet 

func FindLabelsInSet(labelsToKeep []string, selector labels.Set) map[string]string

FindLabelsInSet gets as many key/value pairs as possible out of a label set.

Example

ExampleUtils is a https://blog.golang.org/examples styled unit test. 

labelSubset := labels.Set{}
labelSubset["label1"] = "value1"
labelSubset["label2"] = "value2"
// Lets make believe that these pods are on the cluster.
// Utility functions will inspect their labels, filter them, and so on.
nsPods := []*v1.Pod{
	{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "pod1",
			Namespace: "ns1",
			Labels: map[string]string{
				"label1": "wontSeeThis",
				"label2": "wontSeeThis",
				"label3": "will_see_this",
			},
		},
	}, // first pod which will be used via the utilities
	{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "pod2",
			Namespace: "ns1",
		},
	},

	{
		ObjectMeta: metav1.ObjectMeta{
			Name: "pod3ThatWeWontSee",
		},
	},
}
fmt.Println(FindLabelsInSet([]string{"label1", "label2", "label3"}, nsPods[0].ObjectMeta.Labels)["label3"])
AddUnsetLabelsToMap(labelSubset, []string{"label1", "label2", "label3"}, nsPods[0].ObjectMeta.Labels)
fmt.Println(labelSubset)

for _, pod := range FilterPodsByNamespace(nsPods, "ns1") {
	fmt.Print(pod.Name, ",")
}

Output:

will_see_this
label1=value1,label2=value2,label3=will_see_this
pod1,pod2,

func GetPodAffinityTerms 

func GetPodAffinityTerms(podAffinity *v1.PodAffinity) (terms []v1.PodAffinityTerm)

GetPodAffinityTerms gets pod affinity terms by a pod affinity object.

func GetPodAntiAffinityTerms 

func GetPodAntiAffinityTerms(podAntiAffinity *v1.PodAntiAffinity) (terms []v1.PodAffinityTerm)

GetPodAntiAffinityTerms gets pod affinity terms by a pod anti-affinity.

func GetResourceRequest 

func GetResourceRequest(pod *v1.Pod) *schedulernodeinfo.Resource

GetResourceRequest returns a *schedulernodeinfo.Resource that covers the largest width in each resource dimension. Because init-containers run sequentially, we collect the max in each dimension iteratively. In contrast, we sum the resource vectors for regular containers since they run simultaneously.

If Pod Overhead is specified and the feature gate is set, the resources defined for Overhead are added to the calculated Resource request sum

Example:

Pod: 

InitContainers
  IC1:
    CPU: 2
    Memory: 1G
  IC2:
    CPU: 2
    Memory: 3G
Containers
  C1:
    CPU: 2
    Memory: 1G
  C2:
    CPU: 1
    Memory: 1G

Result: CPU: 3, Memory: 3G

func NodeLabelsMatchSpreadConstraints added in v1.16.0 

func NodeLabelsMatchSpreadConstraints(nodeLabels map[string]string, constraints []topologySpreadConstraint) bool

NodeLabelsMatchSpreadConstraints checks if ALL topology keys in spread constraints are present in node labels.

func Ordering 

func Ordering() []string

Ordering returns the ordering of predicates.

func PodMatchesNodeSelectorAndAffinityTerms added in v1.16.0 

func PodMatchesNodeSelectorAndAffinityTerms(pod *v1.Pod, node *v1.Node) bool

PodMatchesNodeSelectorAndAffinityTerms checks whether the pod is schedulable onto nodes according to the requirements in both NodeAffinity and nodeSelector.

func RegisterPredicateMetadataProducer 

func RegisterPredicateMetadataProducer(predicateName string, precomp predicateMetadataProducer)

RegisterPredicateMetadataProducer registers a MetadataProducer.

func RegisterPredicateMetadataProducerWithExtendedResourceOptions 

func RegisterPredicateMetadataProducerWithExtendedResourceOptions(ignoredExtendedResources sets.String)

RegisterPredicateMetadataProducerWithExtendedResourceOptions registers a MetadataProducer that creates predicate metadata with the provided options for extended resources.

See the comments in "predicateMetadata" for the explanation of the options.

func SetPredicatesOrderingDuringTest added in v1.15.0 

func SetPredicatesOrderingDuringTest(value []string) func()

SetPredicatesOrderingDuringTest sets the predicatesOrdering to the specified value, and returns a function that restores the original value.

Types

type CSIMaxVolumeLimitChecker added in v1.12.0 

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

CSIMaxVolumeLimitChecker defines predicate needed for counting CSI volumes

type FailureReason 

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

FailureReason describes a failure reason.

func NewFailureReason 

func NewFailureReason(msg string) *FailureReason

NewFailureReason creates a FailureReason with message.

func (*FailureReason) GetReason 

func (e *FailureReason) GetReason() string

GetReason returns the reason of the FailureReason.

type FitPredicate added in v1.14.0 

type FitPredicate func(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

FitPredicate is a function that indicates if a pod fits into an existing node. The failure information is given by the error.

func NewCSIMaxVolumeLimitPredicate added in v1.12.0 

func NewCSIMaxVolumeLimitPredicate(
	csiNodeLister storagelisters.CSINodeLister, pvLister corelisters.PersistentVolumeLister, pvcLister corelisters.PersistentVolumeClaimLister, scLister storagelisters.StorageClassLister) FitPredicate

NewCSIMaxVolumeLimitPredicate returns a predicate for counting CSI volumes

func NewMaxPDVolumeCountPredicate 

func NewMaxPDVolumeCountPredicate(filterName string, csiNodeLister storagelisters.CSINodeLister, scLister storagelisters.StorageClassLister,
	pvLister corelisters.PersistentVolumeLister, pvcLister corelisters.PersistentVolumeClaimLister) FitPredicate

NewMaxPDVolumeCountPredicate creates a predicate which evaluates whether a pod can fit based on the number of volumes which match a filter that it requests, and those that are already present.

DEPRECATED All cloudprovider specific predicates defined here are deprecated in favour of CSI volume limit predicate - MaxCSIVolumeCountPred.

The predicate looks for both volumes used directly, as well as PVC volumes that are backed by relevant volume types, counts the number of unique volumes, and rejects the new pod if it would place the total count over the maximum.

func NewNodeLabelPredicate 

func NewNodeLabelPredicate(presentLabels []string, absentLabels []string) FitPredicate

NewNodeLabelPredicate creates a predicate which evaluates whether a pod can fit based on the node labels which match a filter that it requests.

func NewPodAffinityPredicate 

func NewPodAffinityPredicate(nodeInfoLister schedulerlisters.NodeInfoLister, podLister schedulerlisters.PodLister) FitPredicate

NewPodAffinityPredicate creates a PodAffinityChecker.

func NewServiceAffinityPredicate 

func NewServiceAffinityPredicate(nodeInfoLister schedulerlisters.NodeInfoLister, podLister schedulerlisters.PodLister, serviceLister corelisters.ServiceLister, labels []string) (FitPredicate, predicateMetadataProducer)

NewServiceAffinityPredicate creates a ServiceAffinity.

func NewVolumeBindingPredicate 

func NewVolumeBindingPredicate(binder *volumebinder.VolumeBinder) FitPredicate

NewVolumeBindingPredicate 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.

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 NewVolumeZonePredicate 

func NewVolumeZonePredicate(pvLister corelisters.PersistentVolumeLister, pvcLister corelisters.PersistentVolumeClaimLister, scLister storagelisters.StorageClassLister) FitPredicate

NewVolumeZonePredicate 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.

type InTreeToCSITranslator added in v1.17.0 

type InTreeToCSITranslator interface {
	IsPVMigratable(pv *v1.PersistentVolume) bool
	IsMigratableIntreePluginByName(inTreePluginName string) bool
	GetInTreePluginNameFromSpec(pv *v1.PersistentVolume, vol *v1.Volume) (string, error)
	GetCSINameFromInTreeName(pluginName string) (string, error)
	TranslateInTreePVToCSI(pv *v1.PersistentVolume) (*v1.PersistentVolume, error)
}

InTreeToCSITranslator contains methods required to check migratable status and perform translations from InTree PV's to CSI

type InsufficientResourceError 

type InsufficientResourceError struct {
	// resourceName is the name of the resource that is insufficient
	ResourceName v1.ResourceName
	// contains filtered or unexported fields
}

InsufficientResourceError is an error type that indicates what kind of resource limit is hit and caused the unfitting failure.

func NewInsufficientResourceError 

func NewInsufficientResourceError(resourceName v1.ResourceName, requested, used, capacity int64) *InsufficientResourceError

NewInsufficientResourceError returns an InsufficientResourceError.

func (*InsufficientResourceError) Error 

func (e *InsufficientResourceError) Error() string

func (*InsufficientResourceError) GetInsufficientAmount 

func (e *InsufficientResourceError) GetInsufficientAmount() int64

GetInsufficientAmount returns the amount of the insufficient resource of the error.

func (*InsufficientResourceError) GetReason 

func (e *InsufficientResourceError) GetReason() string

GetReason returns the reason of the InsufficientResourceError.

type MaxPDVolumeCountChecker 

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

MaxPDVolumeCountChecker contains information to check the max number of volumes for a predicate.

type Metadata added in v1.17.0 

type Metadata interface {
	ShallowCopy() Metadata
	AddPod(addedPod *v1.Pod, node *v1.Node) error
	RemovePod(deletedPod *v1.Pod, node *v1.Node) error
}

Metadata interface represents anything that can access a predicate metadata.

func EmptyMetadataProducer added in v1.17.0 

func EmptyMetadataProducer(pod *v1.Pod, sharedLister schedulerlisters.SharedLister) Metadata

EmptyMetadataProducer returns a no-op MetadataProducer type.

type MetadataProducer added in v1.17.0 

type MetadataProducer func(pod *v1.Pod, sharedLister schedulerlisters.SharedLister) Metadata

MetadataProducer is a function that computes predicate metadata for a given pod.

type MetadataProducerFactory added in v1.17.0 

type MetadataProducerFactory struct{}

MetadataProducerFactory is a factory to produce Metadata.

func (*MetadataProducerFactory) GetPredicateMetadata added in v1.17.0 

func (f *MetadataProducerFactory) GetPredicateMetadata(pod *v1.Pod, sharedLister schedulerlisters.SharedLister) Metadata

GetPredicateMetadata returns the predicateMetadata which will be used by various predicates.

type NodeLabelChecker 

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

NodeLabelChecker contains information to check node labels for a predicate.

func (*NodeLabelChecker) CheckNodeLabelPresence 

func (n *NodeLabelChecker) CheckNodeLabelPresence(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

CheckNodeLabelPresence checks whether all of the specified labels exists on a node or not, regardless of their value If "presence" is false, then returns false if any of the requested labels matches any of the node's labels, otherwise returns true. If "presence" is true, then returns false if any of the requested labels does not match any of the node's labels, otherwise returns true.

Consider the cases where the nodes are placed in regions/zones/racks and these are identified by labels In some cases, it is required that only nodes that are part of ANY of the defined regions/zones/racks be selected

Alternately, eliminating nodes that have a certain label, regardless of value, is also useful A node may have a label with "retiring" as key and the date as the value and it may be desirable to avoid scheduling new pods on this node.

type PodAffinityChecker 

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

PodAffinityChecker contains information to check pod affinity.

func (*PodAffinityChecker) InterPodAffinityMatches 

func (c *PodAffinityChecker) InterPodAffinityMatches(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

InterPodAffinityMatches checks if a pod can be scheduled on the specified node with pod affinity/anti-affinity configuration. First return value indicates whether a pod can be scheduled on the specified node while the second return value indicates the predicate failure reasons if the pod cannot be scheduled on the specified node.

type PredicateFailureError 

type PredicateFailureError struct {
	PredicateName string
	PredicateDesc string
}

PredicateFailureError describes a failure error of predicate.

func (*PredicateFailureError) Error 

func (e *PredicateFailureError) Error() string

func (*PredicateFailureError) GetReason 

func (e *PredicateFailureError) GetReason() string

GetReason returns the reason of the PredicateFailureError.

type PredicateFailureReason added in v1.14.0 

type PredicateFailureReason interface {
	GetReason() string
}

PredicateFailureReason interface represents the failure reason of a predicate.

func CheckNodeUnschedulablePredicate 

func CheckNodeUnschedulablePredicate(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

CheckNodeUnschedulablePredicate checks if a pod can be scheduled on a node with Unschedulable spec.

func EssentialPredicates 

func EssentialPredicates(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

EssentialPredicates are the predicates that all pods, including critical pods, need.

func EvenPodsSpreadPredicate added in v1.16.0 

func EvenPodsSpreadPredicate(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

EvenPodsSpreadPredicate checks if a pod can be scheduled on a node which satisfies its topologySpreadConstraints.

func GeneralPredicates 

func GeneralPredicates(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

GeneralPredicates checks whether noncriticalPredicates and EssentialPredicates pass. noncriticalPredicates are the predicates that only non-critical pods need and EssentialPredicates are the predicates that all pods, including critical pods, need.

func NoDiskConflict 

func NoDiskConflict(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

NoDiskConflict 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 TODO: migrate this into some per-volume specific code?

func PodFitsHost 

func PodFitsHost(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

PodFitsHost checks if a pod spec node name matches the current node.

func PodFitsHostPorts 

func PodFitsHostPorts(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

PodFitsHostPorts checks if a node has free ports for the requested pod ports.

func PodFitsResources 

func PodFitsResources(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

PodFitsResources checks if a node has sufficient resources, such as cpu, memory, gpu, opaque int resources etc to run a pod. First return value indicates whether a node has sufficient resources to run a pod while the second return value indicates the predicate failure reasons if the node has insufficient resources to run the pod.

func PodMatchNodeSelector 

func PodMatchNodeSelector(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

PodMatchNodeSelector checks if a pod node selector matches the node label.

func PodToleratesNodeNoExecuteTaints 

func PodToleratesNodeNoExecuteTaints(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

PodToleratesNodeNoExecuteTaints checks if a pod tolerations can tolerate the node's NoExecute taints.

func PodToleratesNodeTaints 

func PodToleratesNodeTaints(pod *v1.Pod, meta Metadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error)

PodToleratesNodeTaints checks if a pod tolerations can tolerate the node taints.

func UnresolvablePredicateExists added in v1.17.0 

func UnresolvablePredicateExists(reasons []PredicateFailureReason) PredicateFailureReason

UnresolvablePredicateExists checks if there is at least one unresolvable predicate failure reason, if true returns the first one in the list.

type ServiceAffinity 

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

ServiceAffinity defines a struct used for creating service affinity predicates.

type VolumeBindingChecker 

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

VolumeBindingChecker contains information to check a volume binding.

type VolumeFilter 

type VolumeFilter struct {
	// Filter normal volumes
	FilterVolume           func(vol *v1.Volume) (id string, relevant bool)
	FilterPersistentVolume func(pv *v1.PersistentVolume) (id string, relevant bool)
	// MatchProvisioner evaluates if the StorageClass provisioner matches the running predicate
	MatchProvisioner func(sc *storage.StorageClass) (relevant bool)
	// IsMigrated returns a boolean specifying whether the plugin is migrated to a CSI driver
	IsMigrated func(csiNode *storage.CSINode) bool
}

VolumeFilter contains information on how to filter PD Volumes when checking PD Volume caps.

type VolumeZoneChecker 

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

VolumeZoneChecker contains information to check the volume zone for a predicate.

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