04db076e5f
- Modified the existing spreading priority to consider service pods explicitly - Added a new priority function to spread pods across zones
58 lines
2.6 KiB
Go
58 lines
2.6 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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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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// This is the default algorithm provider for the scheduler.
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package defaults
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import (
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algorithm "github.com/GoogleCloudPlatform/kubernetes/pkg/scheduler"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
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"github.com/GoogleCloudPlatform/kubernetes/plugin/pkg/scheduler/factory"
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)
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func init() {
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factory.RegisterAlgorithmProvider(factory.DefaultProvider, defaultPredicates(), defaultPriorities())
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}
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func defaultPredicates() util.StringSet {
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return util.NewStringSet(
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// Fit is defined based on the absence of port conflicts.
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factory.RegisterFitPredicate("PodFitsPorts", algorithm.PodFitsPorts),
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// Fit is determined by resource availability.
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factory.RegisterFitPredicate("PodFitsResources", algorithm.NewResourceFitPredicate(factory.MinionLister)),
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// Fit is determined by non-conflicting disk volumes.
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factory.RegisterFitPredicate("NoDiskConflict", algorithm.NoDiskConflict),
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// Fit is determined by node selector query.
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factory.RegisterFitPredicate("MatchNodeSelector", algorithm.NewSelectorMatchPredicate(factory.MinionLister)),
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// Fit is determined by the presence of the Host parameter and a string match
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factory.RegisterFitPredicate("HostName", algorithm.PodFitsHost),
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)
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}
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func defaultPriorities() util.StringSet {
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return util.NewStringSet(
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// Prioritize nodes by least requested utilization.
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factory.RegisterPriorityFunction("LeastRequestedPriority", algorithm.LeastRequestedPriority, 1),
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// spreads pods by minimizing the number of pods (belonging to the same service) on the same minion.
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factory.RegisterPriorityFunction("ServiceSpreadingPriority", algorithm.NewServiceSpreadPriority(factory.ServiceLister), 1),
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// spreads pods belonging to the same service across minions in different zones
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// TODO: remove the hardcoding of the "zone" label and move it to a constant
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factory.RegisterPriorityFunction("ZoneSpreadingPriority", algorithm.NewZoneSpreadPriority(factory.ServiceLister, "zone"), 1),
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// EqualPriority is a prioritizer function that gives an equal weight of one to all minions
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factory.RegisterPriorityFunction("EqualPriority", algorithm.EqualPriority, 0),
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)
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}
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