mirror of
https://github.com/kubernetes-sigs/descheduler.git
synced 2026-01-26 13:29:11 +01:00
95 lines
2.9 KiB
Go
95 lines
2.9 KiB
Go
/*
|
|
Copyright 2025 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 defaultevictor
|
|
|
|
import (
|
|
"fmt"
|
|
"time"
|
|
|
|
v1 "k8s.io/api/core/v1"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/labels"
|
|
"k8s.io/klog/v2"
|
|
|
|
frameworktypes "sigs.k8s.io/descheduler/pkg/framework/types"
|
|
)
|
|
|
|
func evictionConstraintsForLabelSelector(logger klog.Logger, labelSelector *metav1.LabelSelector) ([]constraint, error) {
|
|
if labelSelector != nil {
|
|
selector, err := metav1.LabelSelectorAsSelector(labelSelector)
|
|
if err != nil {
|
|
logger.Error(err, "could not get selector from label selector")
|
|
return nil, err
|
|
}
|
|
if !selector.Empty() {
|
|
return []constraint{
|
|
func(pod *v1.Pod) error {
|
|
if !selector.Matches(labels.Set(pod.Labels)) {
|
|
return fmt.Errorf("pod labels do not match the labelSelector filter in the policy parameter")
|
|
}
|
|
return nil
|
|
},
|
|
}, nil
|
|
}
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func evictionConstraintsForMinReplicas(logger klog.Logger, minReplicas uint, handle frameworktypes.Handle) ([]constraint, error) {
|
|
if minReplicas > 1 {
|
|
indexName := "metadata.ownerReferences"
|
|
indexer, err := getPodIndexerByOwnerRefs(indexName, handle)
|
|
if err != nil {
|
|
logger.Error(err, "could not get pod indexer by ownerRefs")
|
|
return nil, err
|
|
}
|
|
return []constraint{
|
|
func(pod *v1.Pod) error {
|
|
if len(pod.OwnerReferences) == 0 {
|
|
return nil
|
|
}
|
|
if len(pod.OwnerReferences) > 1 {
|
|
logger.V(5).Info("pod has multiple owner references which is not supported for minReplicas check", "size", len(pod.OwnerReferences), "pod", klog.KObj(pod))
|
|
return nil
|
|
}
|
|
ownerRef := pod.OwnerReferences[0]
|
|
objs, err := indexer.ByIndex(indexName, string(ownerRef.UID))
|
|
if err != nil {
|
|
return fmt.Errorf("unable to list pods for minReplicas filter in the policy parameter")
|
|
}
|
|
if uint(len(objs)) < minReplicas {
|
|
return fmt.Errorf("owner has %d replicas which is less than minReplicas of %d", len(objs), minReplicas)
|
|
}
|
|
return nil
|
|
},
|
|
}, nil
|
|
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func evictionConstraintsForMinPodAge(minPodAge *metav1.Duration) []constraint {
|
|
if minPodAge != nil {
|
|
return []constraint{
|
|
func(pod *v1.Pod) error {
|
|
if pod.Status.StartTime == nil || time.Since(pod.Status.StartTime.Time) < minPodAge.Duration {
|
|
return fmt.Errorf("pod age is not older than MinPodAge: %s seconds", minPodAge.String())
|
|
}
|
|
return nil
|
|
},
|
|
}
|
|
}
|
|
return nil
|
|
}
|