priorities

package
Version: v0.5.3 Latest Latest
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Published: May 28, 2015 License: Apache-2.0 Imports: 6 Imported by: 0

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Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func BalancedResourceAllocation

func BalancedResourceAllocation(pod *api.Pod, podLister algorithm.PodLister, minionLister algorithm.MinionLister) (algorithm.HostPriorityList, error)

BalancedResourceAllocation favors nodes with balanced resource usage rate. BalancedResourceAllocation should **NOT** be used alone, and **MUST** be used together with LeastRequestedPriority. It calculates the difference between the cpu and memory fracion of capacity, and prioritizes the host based on how close the two metrics are to each other. Detail: score = 10 - abs(cpuFraction-memoryFraction)*10. The algorithm is partly inspired by: "Wei Huang et al. An Energy Efficient Virtual Machine Placement Algorithm with Balanced Resource Utilization"

func LeastRequestedPriority

func LeastRequestedPriority(pod *api.Pod, podLister algorithm.PodLister, minionLister algorithm.MinionLister) (algorithm.HostPriorityList, error)

LeastRequestedPriority is a priority function that favors nodes with fewer requested resources. It calculates the percentage of memory and CPU requested by pods scheduled on the node, and prioritizes based on the minimum of the average of the fraction of requested to capacity. Details: (Sum(requested cpu) / Capacity + Sum(requested memory) / Capacity) * 50

func NewNodeLabelPriority

func NewNodeLabelPriority(label string, presence bool) algorithm.PriorityFunction

func NewServiceAntiAffinityPriority

func NewServiceAntiAffinityPriority(serviceLister algorithm.ServiceLister, label string) algorithm.PriorityFunction

func NewServiceSpreadPriority

func NewServiceSpreadPriority(serviceLister algorithm.ServiceLister) algorithm.PriorityFunction

Types

type NodeLabelPrioritizer

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

func (*NodeLabelPrioritizer) CalculateNodeLabelPriority

func (n *NodeLabelPrioritizer) CalculateNodeLabelPriority(pod *api.Pod, podLister algorithm.PodLister, minionLister algorithm.MinionLister) (algorithm.HostPriorityList, error)

CalculateNodeLabelPriority checks whether a particular label exists on a minion or not, regardless of its value. If presence is true, prioritizes minions that have the specified label, regardless of value. If presence is false, prioritizes minions that do not have the specified label.

type ServiceAntiAffinity

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

func (*ServiceAntiAffinity) CalculateAntiAffinityPriority

func (s *ServiceAntiAffinity) CalculateAntiAffinityPriority(pod *api.Pod, podLister algorithm.PodLister, minionLister algorithm.MinionLister) (algorithm.HostPriorityList, error)

CalculateAntiAffinityPriority spreads pods by minimizing the number of pods belonging to the same service on machines with the same value for a particular label. The label to be considered is provided to the struct (ServiceAntiAffinity).

type ServiceSpread

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

func (*ServiceSpread) CalculateSpreadPriority

func (s *ServiceSpread) CalculateSpreadPriority(pod *api.Pod, podLister algorithm.PodLister, minionLister algorithm.MinionLister) (algorithm.HostPriorityList, error)

CalculateSpreadPriority spreads pods by minimizing the number of pods belonging to the same service on the same machine.

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