55 lines
2.2 KiB
Go
55 lines
2.2 KiB
Go
/*
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Copyright 2017 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 schedulercache
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import (
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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"k8s.io/kubernetes/pkg/api/v1"
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v1helper "k8s.io/kubernetes/pkg/api/v1/helper"
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"k8s.io/kubernetes/pkg/features"
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)
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// Reconcile api and annotation affinity definitions.
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// When alpha affinity feature is not enabled, always take affinity
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// from PodSpec.When alpha affinity feature is enabled, if affinity
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// is not set in PodSpec, take affinity from annotation.
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// When alpha affinity feature is enabled, if affinity is set in PodSpec,
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// take node affinity, pod affinity, and pod anti-affinity individually
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// using the following rule: take affinity from PodSpec if it is defined,
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// otherwise take from annotation if it is defined.
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// TODO: remove when alpha support for affinity is removed
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func ReconcileAffinity(pod *v1.Pod) *v1.Affinity {
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affinity := pod.Spec.Affinity
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if utilfeature.DefaultFeatureGate.Enabled(features.AffinityInAnnotations) {
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annotationsAffinity, _ := v1helper.GetAffinityFromPodAnnotations(pod.Annotations)
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if affinity == nil && annotationsAffinity != nil {
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affinity = annotationsAffinity
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} else if annotationsAffinity != nil {
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if affinity != nil && affinity.NodeAffinity == nil && annotationsAffinity.NodeAffinity != nil {
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affinity.NodeAffinity = annotationsAffinity.NodeAffinity
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}
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if affinity != nil && affinity.PodAffinity == nil && annotationsAffinity.PodAffinity != nil {
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affinity.PodAffinity = annotationsAffinity.PodAffinity
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}
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if affinity != nil && affinity.PodAntiAffinity == nil && annotationsAffinity.PodAntiAffinity != nil {
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affinity.PodAntiAffinity = annotationsAffinity.PodAntiAffinity
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}
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}
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}
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return affinity
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}
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