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56 lines
2.3 KiB
Go
56 lines
2.3 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 algorithm provider has predicates and priorities related to affinity/anti-affinity for the scheduler.
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package affinity
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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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const AffinityProvider string = "AffinityProvider"
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func init() {
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factory.RegisterAlgorithmProvider(AffinityProvider, affinityPredicates(), affinityPriorities())
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}
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func affinityPredicates() util.StringSet {
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return util.NewStringSet(
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"HostName",
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"MatchNodeSelector",
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"PodFitsPorts",
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"PodFitsResources",
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"NoDiskConflict",
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// Ensures that all pods within the same service are hosted on minions within the same region as defined by the "region" label
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factory.RegisterFitPredicate("ServiceAffinity", algorithm.NewServiceAffinityPredicate(factory.PodLister, factory.ServiceLister, factory.MinionLister, []string{"region"})),
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// Fit is defined based on the presence of the "region" label on a minion, regardless of value.
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factory.RegisterFitPredicate("NodeLabelPredicate", algorithm.NewNodeLabelPredicate(factory.MinionLister, []string{"region"}, true)),
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)
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}
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func affinityPriorities() util.StringSet {
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return util.NewStringSet(
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"LeastRequestedPriority",
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"ServiceSpreadingPriority",
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// spreads pods belonging to the same service across minions in different zones
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factory.RegisterPriorityFunction("ZoneSpreadingPriority", algorithm.NewServiceAntiAffinityPriority(factory.ServiceLister, "zone"), 2),
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// Prioritize nodes based on the presence of the "zone" label on a minion, regardless of value.
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factory.RegisterPriorityFunction("NodeLabelPriority", algorithm.NewNodeLabelPriority("zone", true), 1),
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)
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}
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