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129 lines
5.4 KiB
Go
129 lines
5.4 KiB
Go
/*
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Copyright 2014 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/klog"
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"k8s.io/apimachinery/pkg/util/sets"
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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/predicates"
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"k8s.io/kubernetes/pkg/scheduler/algorithm/priorities"
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"k8s.io/kubernetes/pkg/scheduler/factory"
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)
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const (
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// ClusterAutoscalerProvider defines the default autoscaler provider
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ClusterAutoscalerProvider = "ClusterAutoscalerProvider"
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)
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func init() {
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registerAlgorithmProvider(defaultPredicates(), defaultPriorities())
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}
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func defaultPredicates() sets.String {
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return sets.NewString(
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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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// ApplyFeatureGates applies algorithm by feature gates.
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func ApplyFeatureGates() {
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if utilfeature.DefaultFeatureGate.Enabled(features.TaintNodesByCondition) {
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// Remove "CheckNodeCondition", "CheckNodeMemoryPressure", "CheckNodePIDPressurePred"
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// and "CheckNodeDiskPressure" predicates
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factory.RemoveFitPredicate(predicates.CheckNodeConditionPred)
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factory.RemoveFitPredicate(predicates.CheckNodeMemoryPressurePred)
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factory.RemoveFitPredicate(predicates.CheckNodeDiskPressurePred)
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factory.RemoveFitPredicate(predicates.CheckNodePIDPressurePred)
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// Remove key "CheckNodeCondition", "CheckNodeMemoryPressure" and "CheckNodeDiskPressure"
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// from ALL algorithm provider
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// The key will be removed from all providers which in algorithmProviderMap[]
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// if you just want remove specific provider, call func RemovePredicateKeyFromAlgoProvider()
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factory.RemovePredicateKeyFromAlgorithmProviderMap(predicates.CheckNodeConditionPred)
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factory.RemovePredicateKeyFromAlgorithmProviderMap(predicates.CheckNodeMemoryPressurePred)
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factory.RemovePredicateKeyFromAlgorithmProviderMap(predicates.CheckNodeDiskPressurePred)
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factory.RemovePredicateKeyFromAlgorithmProviderMap(predicates.CheckNodePIDPressurePred)
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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.RegisterMandatoryFitPredicate(predicates.PodToleratesNodeTaintsPred, predicates.PodToleratesNodeTaints)
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// Fit is determined based on whether a pod can tolerate unschedulable of node
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factory.RegisterMandatoryFitPredicate(predicates.CheckNodeUnschedulablePred, predicates.CheckNodeUnschedulablePredicate)
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// Insert Key "PodToleratesNodeTaints" and "CheckNodeUnschedulable" To All Algorithm Provider
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// The key will insert to all providers which in algorithmProviderMap[]
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// if you just want insert to specific provider, call func InsertPredicateKeyToAlgoProvider()
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factory.InsertPredicateKeyToAlgorithmProviderMap(predicates.PodToleratesNodeTaintsPred)
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factory.InsertPredicateKeyToAlgorithmProviderMap(predicates.CheckNodeUnschedulablePred)
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klog.Infof("TaintNodesByCondition is enabled, PodToleratesNodeTaints predicate is mandatory")
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}
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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(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(priorities.ResourceLimitsPriority, priorities.ResourceLimitsPriorityMap, nil, 1))
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}
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}
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func registerAlgorithmProvider(predSet, priSet sets.String) {
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// Registers algorithm providers. By default we use 'DefaultProvider', but user can specify one to be used
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// by specifying flag.
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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, 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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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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func copyAndReplace(set sets.String, replaceWhat, replaceWith string) sets.String {
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result := sets.NewString(set.List()...)
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if result.Has(replaceWhat) {
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result.Delete(replaceWhat)
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result.Insert(replaceWith)
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}
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return result
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}
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