mirror of https://github.com/k3s-io/k3s
[scheduler] Move predicate & priority registration to separate file
- Maintain list of default predicates and priorities in defaults.go and move the registration to separate files Signed-off-by: Bhavin Gandhi <bhavin7392@gmail.com>pull/564/head
Bhavin Gandhi
parent
190f6d870e
commit
ca46c1da15
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@ -18,6 +18,7 @@ go_library(
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"node_affinity.go",
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"node_label.go",
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"node_prefer_avoid_pods.go",
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"priorities.go",
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"reduce.go",
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"requested_to_capacity_ratio.go",
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"resource_allocation.go",
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@ -0,0 +1,54 @@
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/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package priorities
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const (
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// EqualPriority defines the name of prioritizer function that gives an equal weight of one to all nodes.
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EqualPriority = "EqualPriority"
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// MostRequestedPriority defines the name of prioritizer function that gives used nodes higher priority.
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MostRequestedPriority = "MostRequestedPriority"
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// RequestedToCapacityRatioPriority defines the name of RequestedToCapacityRatioPriority.
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RequestedToCapacityRatioPriority = "RequestedToCapacityRatioPriority"
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// SelectorSpreadPriority defines the name of prioritizer function that spreads pods by minimizing
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// the number of pods (belonging to the same service or replication controller) on the same node.
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SelectorSpreadPriority = "SelectorSpreadPriority"
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// ServiceSpreadingPriority is largely replaced by "SelectorSpreadPriority".
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ServiceSpreadingPriority = "ServiceSpreadingPriority"
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// InterPodAffinityPriority defines the name of prioritizer function that decides which pods should or
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// should not be placed in the same topological domain as some other pods.
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InterPodAffinityPriority = "InterPodAffinityPriority"
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// LeastRequestedPriority defines the name of prioritizer function that prioritize nodes by least
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// requested utilization.
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LeastRequestedPriority = "LeastRequestedPriority"
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// BalancedResourceAllocation defines the name of prioritizer function that prioritizes nodes
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// to help achieve balanced resource usage.
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BalancedResourceAllocation = "BalancedResourceAllocation"
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// NodePreferAvoidPodsPriority defines the name of prioritizer function that priorities nodes according to
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// the node annotation "scheduler.alpha.kubernetes.io/preferAvoidPods".
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NodePreferAvoidPodsPriority = "NodePreferAvoidPodsPriority"
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// NodeAffinityPriority defines the name of prioritizer function that prioritizes nodes which have labels
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// matching NodeAffinity.
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NodeAffinityPriority = "NodeAffinityPriority"
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// TaintTolerationPriority defines the name of prioritizer function that prioritizes nodes that marked
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// with taint which pod can tolerate.
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TaintTolerationPriority = "TaintTolerationPriority"
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// ImageLocalityPriority defines the name of prioritizer function that prioritizes nodes that have images
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// requested by the pod present.
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ImageLocalityPriority = "ImageLocalityPriority"
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// ResourceLimitsPriority defines the nodes of prioritizer function ResourceLimitsPriority.
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ResourceLimitsPriority = "ResourceLimitsPriority"
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)
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@ -8,7 +8,11 @@ load(
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go_library(
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name = "go_default_library",
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srcs = ["defaults.go"],
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srcs = [
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"defaults.go",
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"register_predicates.go",
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"register_priorities.go",
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],
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importpath = "k8s.io/kubernetes/pkg/scheduler/algorithmprovider/defaults",
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deps = [
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"//pkg/features:go_default_library",
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@ -29,6 +33,7 @@ go_test(
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embed = [":go_default_library"],
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deps = [
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"//pkg/scheduler/algorithm/predicates:go_default_library",
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"//pkg/scheduler/algorithm/priorities:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/util/sets:go_default_library",
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],
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)
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@ -23,10 +23,8 @@ import (
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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"k8s.io/kubernetes/pkg/features"
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"k8s.io/kubernetes/pkg/scheduler/algorithm"
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"k8s.io/kubernetes/pkg/scheduler/algorithm/predicates"
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"k8s.io/kubernetes/pkg/scheduler/algorithm/priorities"
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"k8s.io/kubernetes/pkg/scheduler/core"
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"k8s.io/kubernetes/pkg/scheduler/factory"
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)
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@ -36,139 +34,25 @@ const (
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)
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func init() {
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// Register functions that extract metadata used by predicates and priorities computations.
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factory.RegisterPredicateMetadataProducerFactory(
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func(args factory.PluginFactoryArgs) predicates.PredicateMetadataProducer {
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return predicates.NewPredicateMetadataFactory(args.PodLister)
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})
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factory.RegisterPriorityMetadataProducerFactory(
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func(args factory.PluginFactoryArgs) algorithm.PriorityMetadataProducer {
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return priorities.NewPriorityMetadataFactory(args.ServiceLister, args.ControllerLister, args.ReplicaSetLister, args.StatefulSetLister)
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})
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registerAlgorithmProvider(defaultPredicates(), defaultPriorities())
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// IMPORTANT NOTES for predicate developers:
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// Registers predicates and priorities that are not enabled by default, but user can pick when creating their
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// own set of priorities/predicates.
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// PodFitsPorts has been replaced by PodFitsHostPorts for better user understanding.
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// For backwards compatibility with 1.0, PodFitsPorts is registered as well.
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factory.RegisterFitPredicate("PodFitsPorts", predicates.PodFitsHostPorts)
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// Fit is defined based on the absence of port conflicts.
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// This predicate is actually a default predicate, because it is invoked from
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// predicates.GeneralPredicates()
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factory.RegisterFitPredicate(predicates.PodFitsHostPortsPred, predicates.PodFitsHostPorts)
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// Fit is determined by resource availability.
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// This predicate is actually a default predicate, because it is invoked from
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// predicates.GeneralPredicates()
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factory.RegisterFitPredicate(predicates.PodFitsResourcesPred, predicates.PodFitsResources)
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// Fit is determined by the presence of the Host parameter and a string match
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// This predicate is actually a default predicate, because it is invoked from
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// predicates.GeneralPredicates()
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factory.RegisterFitPredicate(predicates.HostNamePred, predicates.PodFitsHost)
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// Fit is determined by node selector query.
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factory.RegisterFitPredicate(predicates.MatchNodeSelectorPred, predicates.PodMatchNodeSelector)
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// ServiceSpreadingPriority is a priority config factory that spreads pods by minimizing
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// the number of pods (belonging to the same service) on the same node.
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// Register the factory so that it's available, but do not include it as part of the default priorities
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// Largely replaced by "SelectorSpreadPriority", but registered for backward compatibility with 1.0
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factory.RegisterPriorityConfigFactory(
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"ServiceSpreadingPriority",
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factory.PriorityConfigFactory{
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MapReduceFunction: func(args factory.PluginFactoryArgs) (algorithm.PriorityMapFunction, algorithm.PriorityReduceFunction) {
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return priorities.NewSelectorSpreadPriority(args.ServiceLister, algorithm.EmptyControllerLister{}, algorithm.EmptyReplicaSetLister{}, algorithm.EmptyStatefulSetLister{})
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},
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Weight: 1,
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},
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)
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// EqualPriority is a prioritizer function that gives an equal weight of one to all nodes
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// Register the priority function so that its available
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// but do not include it as part of the default priorities
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factory.RegisterPriorityFunction2("EqualPriority", core.EqualPriorityMap, nil, 1)
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// Optional, cluster-autoscaler friendly priority function - give used nodes higher priority.
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factory.RegisterPriorityFunction2("MostRequestedPriority", priorities.MostRequestedPriorityMap, nil, 1)
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factory.RegisterPriorityFunction2(
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"RequestedToCapacityRatioPriority",
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priorities.RequestedToCapacityRatioResourceAllocationPriorityDefault().PriorityMap,
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nil,
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1)
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}
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func defaultPredicates() sets.String {
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return sets.NewString(
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// Fit is determined by volume zone requirements.
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factory.RegisterFitPredicateFactory(
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predicates.NoVolumeZoneConflictPred,
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func(args factory.PluginFactoryArgs) predicates.FitPredicate {
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return predicates.NewVolumeZonePredicate(args.PVInfo, args.PVCInfo, args.StorageClassInfo)
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},
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),
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// Fit is determined by whether or not there would be too many AWS EBS volumes attached to the node
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factory.RegisterFitPredicateFactory(
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predicates.MaxEBSVolumeCountPred,
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func(args factory.PluginFactoryArgs) predicates.FitPredicate {
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return predicates.NewMaxPDVolumeCountPredicate(predicates.EBSVolumeFilterType, args.PVInfo, args.PVCInfo)
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},
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),
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// Fit is determined by whether or not there would be too many GCE PD volumes attached to the node
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factory.RegisterFitPredicateFactory(
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predicates.MaxGCEPDVolumeCountPred,
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func(args factory.PluginFactoryArgs) predicates.FitPredicate {
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return predicates.NewMaxPDVolumeCountPredicate(predicates.GCEPDVolumeFilterType, args.PVInfo, args.PVCInfo)
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},
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),
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// Fit is determined by whether or not there would be too many Azure Disk volumes attached to the node
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factory.RegisterFitPredicateFactory(
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predicates.MaxAzureDiskVolumeCountPred,
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func(args factory.PluginFactoryArgs) predicates.FitPredicate {
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return predicates.NewMaxPDVolumeCountPredicate(predicates.AzureDiskVolumeFilterType, args.PVInfo, args.PVCInfo)
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},
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),
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factory.RegisterFitPredicateFactory(
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predicates.MaxCSIVolumeCountPred,
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func(args factory.PluginFactoryArgs) predicates.FitPredicate {
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return predicates.NewCSIMaxVolumeLimitPredicate(args.PVInfo, args.PVCInfo)
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},
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),
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// Fit is determined by inter-pod affinity.
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factory.RegisterFitPredicateFactory(
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predicates.MatchInterPodAffinityPred,
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func(args factory.PluginFactoryArgs) predicates.FitPredicate {
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return predicates.NewPodAffinityPredicate(args.NodeInfo, args.PodLister)
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},
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),
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// Fit is determined by non-conflicting disk volumes.
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factory.RegisterFitPredicate(predicates.NoDiskConflictPred, predicates.NoDiskConflict),
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// GeneralPredicates are the predicates that are enforced by all Kubernetes components
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// (e.g. kubelet and all schedulers)
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factory.RegisterFitPredicate(predicates.GeneralPred, predicates.GeneralPredicates),
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// Fit is determined by node memory pressure condition.
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factory.RegisterFitPredicate(predicates.CheckNodeMemoryPressurePred, predicates.CheckNodeMemoryPressurePredicate),
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// Fit is determined by node disk pressure condition.
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factory.RegisterFitPredicate(predicates.CheckNodeDiskPressurePred, predicates.CheckNodeDiskPressurePredicate),
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// Fit is determined by node pid pressure condition.
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factory.RegisterFitPredicate(predicates.CheckNodePIDPressurePred, predicates.CheckNodePIDPressurePredicate),
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// Fit is determined by node conditions: not ready, network unavailable or out of disk.
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factory.RegisterMandatoryFitPredicate(predicates.CheckNodeConditionPred, predicates.CheckNodeConditionPredicate),
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// Fit is determined based on whether a pod can tolerate all of the node's taints
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factory.RegisterFitPredicate(predicates.PodToleratesNodeTaintsPred, predicates.PodToleratesNodeTaints),
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// Fit is determined by volume topology requirements.
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factory.RegisterFitPredicateFactory(
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predicates.CheckVolumeBindingPred,
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func(args factory.PluginFactoryArgs) predicates.FitPredicate {
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return predicates.NewVolumeBindingPredicate(args.VolumeBinder)
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},
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),
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predicates.NoVolumeZoneConflictPred,
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predicates.MaxEBSVolumeCountPred,
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predicates.MaxGCEPDVolumeCountPred,
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predicates.MaxAzureDiskVolumeCountPred,
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predicates.MaxCSIVolumeCountPred,
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predicates.MatchInterPodAffinityPred,
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predicates.NoDiskConflictPred,
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predicates.GeneralPred,
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predicates.CheckNodeMemoryPressurePred,
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predicates.CheckNodeDiskPressurePred,
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predicates.CheckNodePIDPressurePred,
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predicates.CheckNodeConditionPred,
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predicates.PodToleratesNodeTaintsPred,
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predicates.CheckVolumeBindingPred,
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)
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}
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@ -206,9 +90,9 @@ func ApplyFeatureGates() {
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// Prioritizes nodes that satisfy pod's resource limits
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if utilfeature.DefaultFeatureGate.Enabled(features.ResourceLimitsPriorityFunction) {
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klog.Infof("Registering resourcelimits priority function")
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factory.RegisterPriorityFunction2("ResourceLimitsPriority", priorities.ResourceLimitsPriorityMap, nil, 1)
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factory.RegisterPriorityFunction2(priorities.ResourceLimitsPriority, priorities.ResourceLimitsPriorityMap, nil, 1)
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// Register the priority function to specific provider too.
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factory.InsertPriorityKeyToAlgorithmProviderMap(factory.RegisterPriorityFunction2("ResourceLimitsPriority", priorities.ResourceLimitsPriorityMap, nil, 1))
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factory.InsertPriorityKeyToAlgorithmProviderMap(factory.RegisterPriorityFunction2(priorities.ResourceLimitsPriority, priorities.ResourceLimitsPriorityMap, nil, 1))
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}
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}
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@ -218,51 +102,19 @@ func registerAlgorithmProvider(predSet, priSet sets.String) {
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factory.RegisterAlgorithmProvider(factory.DefaultProvider, predSet, priSet)
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// Cluster autoscaler friendly scheduling algorithm.
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factory.RegisterAlgorithmProvider(ClusterAutoscalerProvider, predSet,
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copyAndReplace(priSet, "LeastRequestedPriority", "MostRequestedPriority"))
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copyAndReplace(priSet, priorities.LeastRequestedPriority, priorities.MostRequestedPriority))
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}
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func defaultPriorities() sets.String {
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return sets.NewString(
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// spreads pods by minimizing the number of pods (belonging to the same service or replication controller) on the same node.
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factory.RegisterPriorityConfigFactory(
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"SelectorSpreadPriority",
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factory.PriorityConfigFactory{
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MapReduceFunction: func(args factory.PluginFactoryArgs) (algorithm.PriorityMapFunction, algorithm.PriorityReduceFunction) {
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return priorities.NewSelectorSpreadPriority(args.ServiceLister, args.ControllerLister, args.ReplicaSetLister, args.StatefulSetLister)
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},
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Weight: 1,
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},
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),
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// pods should be placed in the same topological domain (e.g. same node, same rack, same zone, same power domain, etc.)
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// as some other pods, or, conversely, should not be placed in the same topological domain as some other pods.
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factory.RegisterPriorityConfigFactory(
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"InterPodAffinityPriority",
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factory.PriorityConfigFactory{
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Function: func(args factory.PluginFactoryArgs) algorithm.PriorityFunction {
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return priorities.NewInterPodAffinityPriority(args.NodeInfo, args.NodeLister, args.PodLister, args.HardPodAffinitySymmetricWeight)
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},
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Weight: 1,
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},
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),
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// Prioritize nodes by least requested utilization.
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factory.RegisterPriorityFunction2("LeastRequestedPriority", priorities.LeastRequestedPriorityMap, nil, 1),
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// Prioritizes nodes to help achieve balanced resource usage
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factory.RegisterPriorityFunction2("BalancedResourceAllocation", priorities.BalancedResourceAllocationMap, nil, 1),
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// Set this weight large enough to override all other priority functions.
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// TODO: Figure out a better way to do this, maybe at same time as fixing #24720.
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factory.RegisterPriorityFunction2("NodePreferAvoidPodsPriority", priorities.CalculateNodePreferAvoidPodsPriorityMap, nil, 10000),
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// Prioritizes nodes that have labels matching NodeAffinity
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factory.RegisterPriorityFunction2("NodeAffinityPriority", priorities.CalculateNodeAffinityPriorityMap, priorities.CalculateNodeAffinityPriorityReduce, 1),
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// Prioritizes nodes that marked with taint which pod can tolerate.
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factory.RegisterPriorityFunction2("TaintTolerationPriority", priorities.ComputeTaintTolerationPriorityMap, priorities.ComputeTaintTolerationPriorityReduce, 1),
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// ImageLocalityPriority prioritizes nodes that have images requested by the pod present.
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factory.RegisterPriorityFunction2("ImageLocalityPriority", priorities.ImageLocalityPriorityMap, nil, 1),
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priorities.SelectorSpreadPriority,
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priorities.InterPodAffinityPriority,
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priorities.LeastRequestedPriority,
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priorities.BalancedResourceAllocation,
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priorities.NodePreferAvoidPodsPriority,
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priorities.NodeAffinityPriority,
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priorities.TaintTolerationPriority,
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priorities.ImageLocalityPriority,
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)
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}
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@ -21,6 +21,7 @@ import (
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/kubernetes/pkg/scheduler/algorithm/predicates"
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"k8s.io/kubernetes/pkg/scheduler/algorithm/priorities"
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)
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func TestCopyAndReplace(t *testing.T) {
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@ -53,14 +54,15 @@ func TestCopyAndReplace(t *testing.T) {
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func TestDefaultPriorities(t *testing.T) {
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result := sets.NewString(
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"SelectorSpreadPriority",
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"InterPodAffinityPriority",
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"LeastRequestedPriority",
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"BalancedResourceAllocation",
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"NodePreferAvoidPodsPriority",
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"NodeAffinityPriority",
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"TaintTolerationPriority",
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"ImageLocalityPriority")
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priorities.SelectorSpreadPriority,
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priorities.InterPodAffinityPriority,
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priorities.LeastRequestedPriority,
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priorities.BalancedResourceAllocation,
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priorities.NodePreferAvoidPodsPriority,
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priorities.NodeAffinityPriority,
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priorities.TaintTolerationPriority,
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priorities.ImageLocalityPriority,
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)
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if expected := defaultPriorities(); !result.Equal(expected) {
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t.Errorf("expected %v got %v", expected, result)
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}
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@ -0,0 +1,124 @@
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/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
|
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
|
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limitations under the License.
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*/
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package defaults
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import (
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"k8s.io/kubernetes/pkg/scheduler/algorithm/predicates"
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"k8s.io/kubernetes/pkg/scheduler/factory"
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)
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func init() {
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// Register functions that extract metadata used by predicates computations.
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factory.RegisterPredicateMetadataProducerFactory(
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func(args factory.PluginFactoryArgs) predicates.PredicateMetadataProducer {
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return predicates.NewPredicateMetadataFactory(args.PodLister)
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})
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// IMPORTANT NOTES for predicate developers:
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// Registers predicates and priorities that are not enabled by default, but user can pick when creating their
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// own set of priorities/predicates.
|
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|
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// PodFitsPorts has been replaced by PodFitsHostPorts for better user understanding.
|
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// For backwards compatibility with 1.0, PodFitsPorts is registered as well.
|
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factory.RegisterFitPredicate("PodFitsPorts", predicates.PodFitsHostPorts)
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// Fit is defined based on the absence of port conflicts.
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// This predicate is actually a default predicate, because it is invoked from
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// predicates.GeneralPredicates()
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factory.RegisterFitPredicate(predicates.PodFitsHostPortsPred, predicates.PodFitsHostPorts)
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// Fit is determined by resource availability.
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// This predicate is actually a default predicate, because it is invoked from
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// predicates.GeneralPredicates()
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factory.RegisterFitPredicate(predicates.PodFitsResourcesPred, predicates.PodFitsResources)
|
||||
// Fit is determined by the presence of the Host parameter and a string match
|
||||
// This predicate is actually a default predicate, because it is invoked from
|
||||
// predicates.GeneralPredicates()
|
||||
factory.RegisterFitPredicate(predicates.HostNamePred, predicates.PodFitsHost)
|
||||
// Fit is determined by node selector query.
|
||||
factory.RegisterFitPredicate(predicates.MatchNodeSelectorPred, predicates.PodMatchNodeSelector)
|
||||
|
||||
// Fit is determined by volume zone requirements.
|
||||
factory.RegisterFitPredicateFactory(
|
||||
predicates.NoVolumeZoneConflictPred,
|
||||
func(args factory.PluginFactoryArgs) predicates.FitPredicate {
|
||||
return predicates.NewVolumeZonePredicate(args.PVInfo, args.PVCInfo, args.StorageClassInfo)
|
||||
},
|
||||
)
|
||||
// Fit is determined by whether or not there would be too many AWS EBS volumes attached to the node
|
||||
factory.RegisterFitPredicateFactory(
|
||||
predicates.MaxEBSVolumeCountPred,
|
||||
func(args factory.PluginFactoryArgs) predicates.FitPredicate {
|
||||
return predicates.NewMaxPDVolumeCountPredicate(predicates.EBSVolumeFilterType, args.PVInfo, args.PVCInfo)
|
||||
},
|
||||
)
|
||||
// Fit is determined by whether or not there would be too many GCE PD volumes attached to the node
|
||||
factory.RegisterFitPredicateFactory(
|
||||
predicates.MaxGCEPDVolumeCountPred,
|
||||
func(args factory.PluginFactoryArgs) predicates.FitPredicate {
|
||||
return predicates.NewMaxPDVolumeCountPredicate(predicates.GCEPDVolumeFilterType, args.PVInfo, args.PVCInfo)
|
||||
},
|
||||
)
|
||||
// Fit is determined by whether or not there would be too many Azure Disk volumes attached to the node
|
||||
factory.RegisterFitPredicateFactory(
|
||||
predicates.MaxAzureDiskVolumeCountPred,
|
||||
func(args factory.PluginFactoryArgs) predicates.FitPredicate {
|
||||
return predicates.NewMaxPDVolumeCountPredicate(predicates.AzureDiskVolumeFilterType, args.PVInfo, args.PVCInfo)
|
||||
},
|
||||
)
|
||||
factory.RegisterFitPredicateFactory(
|
||||
predicates.MaxCSIVolumeCountPred,
|
||||
func(args factory.PluginFactoryArgs) predicates.FitPredicate {
|
||||
return predicates.NewCSIMaxVolumeLimitPredicate(args.PVInfo, args.PVCInfo)
|
||||
},
|
||||
)
|
||||
// Fit is determined by inter-pod affinity.
|
||||
factory.RegisterFitPredicateFactory(
|
||||
predicates.MatchInterPodAffinityPred,
|
||||
func(args factory.PluginFactoryArgs) predicates.FitPredicate {
|
||||
return predicates.NewPodAffinityPredicate(args.NodeInfo, args.PodLister)
|
||||
},
|
||||
)
|
||||
|
||||
// Fit is determined by non-conflicting disk volumes.
|
||||
factory.RegisterFitPredicate(predicates.NoDiskConflictPred, predicates.NoDiskConflict)
|
||||
|
||||
// GeneralPredicates are the predicates that are enforced by all Kubernetes components
|
||||
// (e.g. kubelet and all schedulers)
|
||||
factory.RegisterFitPredicate(predicates.GeneralPred, predicates.GeneralPredicates)
|
||||
|
||||
// Fit is determined by node memory pressure condition.
|
||||
factory.RegisterFitPredicate(predicates.CheckNodeMemoryPressurePred, predicates.CheckNodeMemoryPressurePredicate)
|
||||
|
||||
// Fit is determined by node disk pressure condition.
|
||||
factory.RegisterFitPredicate(predicates.CheckNodeDiskPressurePred, predicates.CheckNodeDiskPressurePredicate)
|
||||
|
||||
// Fit is determined by node pid pressure condition.
|
||||
factory.RegisterFitPredicate(predicates.CheckNodePIDPressurePred, predicates.CheckNodePIDPressurePredicate)
|
||||
|
||||
// Fit is determined by node conditions: not ready, network unavailable or out of disk.
|
||||
factory.RegisterMandatoryFitPredicate(predicates.CheckNodeConditionPred, predicates.CheckNodeConditionPredicate)
|
||||
|
||||
// Fit is determined based on whether a pod can tolerate all of the node's taints
|
||||
factory.RegisterFitPredicate(predicates.PodToleratesNodeTaintsPred, predicates.PodToleratesNodeTaints)
|
||||
|
||||
// Fit is determined by volume topology requirements.
|
||||
factory.RegisterFitPredicateFactory(
|
||||
predicates.CheckVolumeBindingPred,
|
||||
func(args factory.PluginFactoryArgs) predicates.FitPredicate {
|
||||
return predicates.NewVolumeBindingPredicate(args.VolumeBinder)
|
||||
},
|
||||
)
|
||||
}
|
||||
|
|
@ -0,0 +1,97 @@
|
|||
/*
|
||||
Copyright 2018 The Kubernetes Authors.
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
*/
|
||||
|
||||
package defaults
|
||||
|
||||
import (
|
||||
"k8s.io/kubernetes/pkg/scheduler/algorithm"
|
||||
"k8s.io/kubernetes/pkg/scheduler/algorithm/priorities"
|
||||
"k8s.io/kubernetes/pkg/scheduler/core"
|
||||
"k8s.io/kubernetes/pkg/scheduler/factory"
|
||||
)
|
||||
|
||||
func init() {
|
||||
// Register functions that extract metadata used by priorities computations.
|
||||
factory.RegisterPriorityMetadataProducerFactory(
|
||||
func(args factory.PluginFactoryArgs) algorithm.PriorityMetadataProducer {
|
||||
return priorities.NewPriorityMetadataFactory(args.ServiceLister, args.ControllerLister, args.ReplicaSetLister, args.StatefulSetLister)
|
||||
})
|
||||
|
||||
// ServiceSpreadingPriority is a priority config factory that spreads pods by minimizing
|
||||
// the number of pods (belonging to the same service) on the same node.
|
||||
// Register the factory so that it's available, but do not include it as part of the default priorities
|
||||
// Largely replaced by "SelectorSpreadPriority", but registered for backward compatibility with 1.0
|
||||
factory.RegisterPriorityConfigFactory(
|
||||
priorities.ServiceSpreadingPriority,
|
||||
factory.PriorityConfigFactory{
|
||||
MapReduceFunction: func(args factory.PluginFactoryArgs) (algorithm.PriorityMapFunction, algorithm.PriorityReduceFunction) {
|
||||
return priorities.NewSelectorSpreadPriority(args.ServiceLister, algorithm.EmptyControllerLister{}, algorithm.EmptyReplicaSetLister{}, algorithm.EmptyStatefulSetLister{})
|
||||
},
|
||||
Weight: 1,
|
||||
},
|
||||
)
|
||||
// EqualPriority is a prioritizer function that gives an equal weight of one to all nodes
|
||||
// Register the priority function so that its available
|
||||
// but do not include it as part of the default priorities
|
||||
factory.RegisterPriorityFunction2(priorities.EqualPriority, core.EqualPriorityMap, nil, 1)
|
||||
// Optional, cluster-autoscaler friendly priority function - give used nodes higher priority.
|
||||
factory.RegisterPriorityFunction2(priorities.MostRequestedPriority, priorities.MostRequestedPriorityMap, nil, 1)
|
||||
factory.RegisterPriorityFunction2(
|
||||
priorities.RequestedToCapacityRatioPriority,
|
||||
priorities.RequestedToCapacityRatioResourceAllocationPriorityDefault().PriorityMap,
|
||||
nil,
|
||||
1)
|
||||
// spreads pods by minimizing the number of pods (belonging to the same service or replication controller) on the same node.
|
||||
factory.RegisterPriorityConfigFactory(
|
||||
priorities.SelectorSpreadPriority,
|
||||
factory.PriorityConfigFactory{
|
||||
MapReduceFunction: func(args factory.PluginFactoryArgs) (algorithm.PriorityMapFunction, algorithm.PriorityReduceFunction) {
|
||||
return priorities.NewSelectorSpreadPriority(args.ServiceLister, args.ControllerLister, args.ReplicaSetLister, args.StatefulSetLister)
|
||||
},
|
||||
Weight: 1,
|
||||
},
|
||||
)
|
||||
// pods should be placed in the same topological domain (e.g. same node, same rack, same zone, same power domain, etc.)
|
||||
// as some other pods, or, conversely, should not be placed in the same topological domain as some other pods.
|
||||
factory.RegisterPriorityConfigFactory(
|
||||
priorities.InterPodAffinityPriority,
|
||||
factory.PriorityConfigFactory{
|
||||
Function: func(args factory.PluginFactoryArgs) algorithm.PriorityFunction {
|
||||
return priorities.NewInterPodAffinityPriority(args.NodeInfo, args.NodeLister, args.PodLister, args.HardPodAffinitySymmetricWeight)
|
||||
},
|
||||
Weight: 1,
|
||||
},
|
||||
)
|
||||
|
||||
// Prioritize nodes by least requested utilization.
|
||||
factory.RegisterPriorityFunction2(priorities.LeastRequestedPriority, priorities.LeastRequestedPriorityMap, nil, 1)
|
||||
|
||||
// Prioritizes nodes to help achieve balanced resource usage
|
||||
factory.RegisterPriorityFunction2(priorities.BalancedResourceAllocation, priorities.BalancedResourceAllocationMap, nil, 1)
|
||||
|
||||
// Set this weight large enough to override all other priority functions.
|
||||
// TODO: Figure out a better way to do this, maybe at same time as fixing #24720.
|
||||
factory.RegisterPriorityFunction2(priorities.NodePreferAvoidPodsPriority, priorities.CalculateNodePreferAvoidPodsPriorityMap, nil, 10000)
|
||||
|
||||
// Prioritizes nodes that have labels matching NodeAffinity
|
||||
factory.RegisterPriorityFunction2(priorities.NodeAffinityPriority, priorities.CalculateNodeAffinityPriorityMap, priorities.CalculateNodeAffinityPriorityReduce, 1)
|
||||
|
||||
// Prioritizes nodes that marked with taint which pod can tolerate.
|
||||
factory.RegisterPriorityFunction2(priorities.TaintTolerationPriority, priorities.ComputeTaintTolerationPriorityMap, priorities.ComputeTaintTolerationPriorityReduce, 1)
|
||||
|
||||
// ImageLocalityPriority prioritizes nodes that have images requested by the pod present.
|
||||
factory.RegisterPriorityFunction2(priorities.ImageLocalityPriority, priorities.ImageLocalityPriorityMap, nil, 1)
|
||||
}
|
||||
Loading…
Reference in New Issue