predicates

Documentation

Index

• Variables
• func CheckPodsExceedingFreeResources(pods []*api.Pod, capacity api.ResourceList) (fitting []*api.Pod, notFittingCPU, notFittingMemory []*api.Pod)
• func MapPodsToMachines(lister algorithm.PodLister) (map[string][]*api.Pod, error)
• func NewNodeLabelPredicate(info NodeInfo, labels []string, presence bool) algorithm.FitPredicate
• func NewResourceFitPredicate(info NodeInfo) algorithm.FitPredicate
• func NewSelectorMatchPredicate(info NodeInfo) algorithm.FitPredicate
• func NewServiceAffinityPredicate(podLister algorithm.PodLister, serviceLister algorithm.ServiceLister, ...) algorithm.FitPredicate
• func NoDiskConflict(pod *api.Pod, existingPods []*api.Pod, node string) (bool, error)
• func PodFitsHost(pod *api.Pod, existingPods []*api.Pod, node string) (bool, error)
• func PodFitsPorts(pod *api.Pod, existingPods []*api.Pod, node string) (bool, error)
• func PodMatchesNodeLabels(pod *api.Pod, node *api.Node) bool
• type ClientNodeInfo
  • func (nodes ClientNodeInfo) GetNodeInfo(nodeID string) (*api.Node, error)
• type NodeInfo
• type NodeLabelChecker
  • func (n *NodeLabelChecker) CheckNodeLabelPresence(pod *api.Pod, existingPods []*api.Pod, nodeID string) (bool, error)
• type NodeSelector
  • func (n *NodeSelector) PodSelectorMatches(pod *api.Pod, existingPods []*api.Pod, nodeID string) (bool, error)
• type ResourceFit
  • func (r *ResourceFit) PodFitsResources(pod *api.Pod, existingPods []*api.Pod, node string) (bool, error)
• type ServiceAffinity
  • func (s *ServiceAffinity) CheckServiceAffinity(pod *api.Pod, existingPods []*api.Pod, nodeID string) (bool, error)
• type StaticNodeInfo
  • func (nodes StaticNodeInfo) GetNodeInfo(nodeID string) (*api.Node, error)

Variables

var FailedResourceType string

Functions

func CheckPodsExceedingFreeResources

func CheckPodsExceedingFreeResources(pods []*api.Pod, capacity api.ResourceList) (fitting []*api.Pod, notFittingCPU, notFittingMemory []*api.Pod)

func MapPodsToMachines

func MapPodsToMachines(lister algorithm.PodLister) (map[string][]*api.Pod, error)

MapPodsToMachines obtains a list of pods and pivots that list into a map where the keys are host names and the values are the list of pods running on that host.

func NewNodeLabelPredicate

func NewNodeLabelPredicate(info NodeInfo, labels []string, presence bool) algorithm.FitPredicate

func NewResourceFitPredicate

func NewResourceFitPredicate(info NodeInfo) algorithm.FitPredicate

func NewSelectorMatchPredicate

func NewSelectorMatchPredicate(info NodeInfo) algorithm.FitPredicate

func NewServiceAffinityPredicate

func NewServiceAffinityPredicate(podLister algorithm.PodLister, serviceLister algorithm.ServiceLister, nodeInfo NodeInfo, labels []string) algorithm.FitPredicate

func NoDiskConflict

func NoDiskConflict(pod *api.Pod, existingPods []*api.Pod, node string) (bool, error)

NoDiskConflict evaluates if a pod can fit due to the volumes it requests, and those that are already mounted. Some times of volumes are mounted onto node machines. For now, these mounts are exclusive so if there is already a volume mounted on that node, another pod can't schedule there. This is GCE and Amazon EBS specific for now. TODO: migrate this into some per-volume specific code?

func PodFitsHost

func PodFitsHost(pod *api.Pod, existingPods []*api.Pod, node string) (bool, error)

func PodFitsPorts

func PodFitsPorts(pod *api.Pod, existingPods []*api.Pod, node string) (bool, error)

func PodMatchesNodeLabels

func PodMatchesNodeLabels(pod *api.Pod, node *api.Node) bool

Types

type ClientNodeInfo

type ClientNodeInfo struct {
	*client.Client
}

func (ClientNodeInfo) GetNodeInfo

func (nodes ClientNodeInfo) GetNodeInfo(nodeID string) (*api.Node, error)

type NodeInfo

type NodeInfo interface {
	GetNodeInfo(nodeID string) (*api.Node, error)
}

type NodeLabelChecker

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

func (*NodeLabelChecker) CheckNodeLabelPresence

func (n *NodeLabelChecker) CheckNodeLabelPresence(pod *api.Pod, existingPods []*api.Pod, nodeID string) (bool, 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 NodeSelector

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

func (*NodeSelector) PodSelectorMatches

func (n *NodeSelector) PodSelectorMatches(pod *api.Pod, existingPods []*api.Pod, nodeID string) (bool, error)

type ResourceFit

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

func (*ResourceFit) PodFitsResources

func (r *ResourceFit) PodFitsResources(pod *api.Pod, existingPods []*api.Pod, node string) (bool, error)

PodFitsResources calculates fit based on requested, rather than used resources

type ServiceAffinity

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

func (*ServiceAffinity) CheckServiceAffinity

func (s *ServiceAffinity) CheckServiceAffinity(pod *api.Pod, existingPods []*api.Pod, nodeID string) (bool, error)

CheckServiceAffinity ensures that only the nodes that match the specified labels are considered for scheduling. The set of labels to be considered are provided to the struct (ServiceAffinity). The pod is checked for the labels and any missing labels are then checked in the node that hosts the service pods (peers) for the given pod.

We add an implicit selector requiring some particular value V for label L to a pod, if: - L is listed in the ServiceAffinity object that is passed into the function - the pod does not have any NodeSelector for L - some other pod from the same service is already scheduled onto a node that has value V for label L

type StaticNodeInfo

type StaticNodeInfo struct {
	*api.NodeList
}

func (StaticNodeInfo) GetNodeInfo

func (nodes StaticNodeInfo) GetNodeInfo(nodeID string) (*api.Node, error)