mirror of
https://github.com/kubernetes-sigs/descheduler.git
synced 2026-01-26 05:14:13 +01:00
95 lines
2.9 KiB
Go
95 lines
2.9 KiB
Go
/*
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Copyright 2025 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 defaultevictor
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import (
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"fmt"
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"time"
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v1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/klog/v2"
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frameworktypes "sigs.k8s.io/descheduler/pkg/framework/types"
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)
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func evictionConstraintsForLabelSelector(logger klog.Logger, labelSelector *metav1.LabelSelector) ([]constraint, error) {
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if labelSelector != nil {
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selector, err := metav1.LabelSelectorAsSelector(labelSelector)
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if err != nil {
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logger.Error(err, "could not get selector from label selector")
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return nil, err
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}
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if !selector.Empty() {
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return []constraint{
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func(pod *v1.Pod) error {
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if !selector.Matches(labels.Set(pod.Labels)) {
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return fmt.Errorf("pod labels do not match the labelSelector filter in the policy parameter")
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}
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return nil
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},
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}, nil
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}
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}
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return nil, nil
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}
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func evictionConstraintsForMinReplicas(logger klog.Logger, minReplicas uint, handle frameworktypes.Handle) ([]constraint, error) {
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if minReplicas > 1 {
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indexName := "metadata.ownerReferences"
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indexer, err := getPodIndexerByOwnerRefs(indexName, handle)
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if err != nil {
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logger.Error(err, "could not get pod indexer by ownerRefs")
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return nil, err
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}
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return []constraint{
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func(pod *v1.Pod) error {
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if len(pod.OwnerReferences) == 0 {
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return nil
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}
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if len(pod.OwnerReferences) > 1 {
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logger.V(5).Info("pod has multiple owner references which is not supported for minReplicas check", "size", len(pod.OwnerReferences), "pod", klog.KObj(pod))
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return nil
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}
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ownerRef := pod.OwnerReferences[0]
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objs, err := indexer.ByIndex(indexName, string(ownerRef.UID))
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if err != nil {
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return fmt.Errorf("unable to list pods for minReplicas filter in the policy parameter")
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}
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if uint(len(objs)) < minReplicas {
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return fmt.Errorf("owner has %d replicas which is less than minReplicas of %d", len(objs), minReplicas)
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}
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return nil
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},
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}, nil
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}
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return nil, nil
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}
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func evictionConstraintsForMinPodAge(minPodAge *metav1.Duration) []constraint {
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if minPodAge != nil {
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return []constraint{
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func(pod *v1.Pod) error {
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if pod.Status.StartTime == nil || time.Since(pod.Status.StartTime.Time) < minPodAge.Duration {
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return fmt.Errorf("pod age is not older than MinPodAge: %s seconds", minPodAge.String())
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}
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return nil
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},
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}
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}
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return nil
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}
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