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EvenPodsSpread: Define a new Priority

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Wei Huang 2019-05-08 15:58:42 -07:00
parent 9bae1bc568
commit eefc18a763
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3 changed files with 26 additions and 1 deletions
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17
pkg/scheduler/algorithm/priorities/even_pods_spread.go Normal file
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@ -0,0 +1,17 @@
/*
Copyright 2019 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 priorities

3
pkg/scheduler/algorithm/priorities/priorities.go
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@ -51,4 +51,7 @@ const (
ImageLocalityPriority = "ImageLocalityPriority" ImageLocalityPriority = "ImageLocalityPriority"
// ResourceLimitsPriority defines the nodes of prioritizer function ResourceLimitsPriority. // ResourceLimitsPriority defines the nodes of prioritizer function ResourceLimitsPriority.
ResourceLimitsPriority = "ResourceLimitsPriority" ResourceLimitsPriority = "ResourceLimitsPriority"
// EvenPodsSpreadPriority defines the name of prioritizer function that prioritizes nodes
// which have pods and labels matching the incoming pod's topologySpreadConstraints.
EvenPodsSpreadPriority = "EvenPodsSpreadPriority"
) )

7
pkg/scheduler/algorithmprovider/defaults/defaults.go
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@ -87,10 +87,15 @@ func ApplyFeatureGates() {
klog.Infof("TaintNodesByCondition is enabled, PodToleratesNodeTaints predicate is mandatory") klog.Infof("TaintNodesByCondition is enabled, PodToleratesNodeTaints predicate is mandatory")
} }
// Only register EvenPodsSpreadPredicate if the feature is enabled // Only register EvenPodsSpread predicate & priority if the feature is enabled
if utilfeature.DefaultFeatureGate.Enabled(features.EvenPodsSpread) { if utilfeature.DefaultFeatureGate.Enabled(features.EvenPodsSpread) {
klog.Infof("Registering EvenPodsSpread predicate and priority function")
// register predicate
factory.InsertPredicateKeyToAlgorithmProviderMap(predicates.EvenPodsSpreadPred) factory.InsertPredicateKeyToAlgorithmProviderMap(predicates.EvenPodsSpreadPred)
factory.RegisterFitPredicate(predicates.EvenPodsSpreadPred, predicates.EvenPodsSpreadPredicate) factory.RegisterFitPredicate(predicates.EvenPodsSpreadPred, predicates.EvenPodsSpreadPredicate)
// register priority
factory.InsertPriorityKeyToAlgorithmProviderMap(priorities.EvenPodsSpreadPriority)
factory.RegisterPriorityFunction(priorities.EvenPodsSpreadPriority, priorities.CalculateEvenPodsSpreadPriority, 1)
} }
// Prioritizes nodes that satisfy pod's resource limits // Prioritizes nodes that satisfy pod's resource limits