mirror of
https://github.com/kubernetes-sigs/descheduler.git
synced 2026-01-26 05:14:13 +01:00
108 lines
3.8 KiB
Go
108 lines
3.8 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 strategies
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import (
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"context"
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"fmt"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/util/sets"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/klog/v2"
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"sigs.k8s.io/descheduler/pkg/api"
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"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
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nodeutil "sigs.k8s.io/descheduler/pkg/descheduler/node"
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podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
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)
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func validatePodsViolatingNodeAffinityParams(params *api.StrategyParameters) error {
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if params == nil || len(params.NodeAffinityType) == 0 {
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return fmt.Errorf("NodeAffinityType is empty")
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}
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// At most one of include/exclude can be set
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if params.Namespaces != nil && len(params.Namespaces.Include) > 0 && len(params.Namespaces.Exclude) > 0 {
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return fmt.Errorf("only one of Include/Exclude namespaces can be set")
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}
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if params.ThresholdPriority != nil && params.ThresholdPriorityClassName != "" {
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return fmt.Errorf("only one of thresholdPriority and thresholdPriorityClassName can be set")
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}
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return nil
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}
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// RemovePodsViolatingNodeAffinity evicts pods on nodes which violate node affinity
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func RemovePodsViolatingNodeAffinity(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor, evictorFilter *evictions.EvictorFilter, getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc) {
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if err := validatePodsViolatingNodeAffinityParams(strategy.Params); err != nil {
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klog.ErrorS(err, "Invalid RemovePodsViolatingNodeAffinity parameters")
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return
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}
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var includedNamespaces, excludedNamespaces sets.String
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if strategy.Params.Namespaces != nil {
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includedNamespaces = sets.NewString(strategy.Params.Namespaces.Include...)
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excludedNamespaces = sets.NewString(strategy.Params.Namespaces.Exclude...)
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}
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podFilter, err := podutil.NewOptions().
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WithNamespaces(includedNamespaces).
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WithoutNamespaces(excludedNamespaces).
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WithLabelSelector(strategy.Params.LabelSelector).
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BuildFilterFunc()
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if err != nil {
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klog.ErrorS(err, "Error initializing pod filter function")
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return
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}
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for _, nodeAffinity := range strategy.Params.NodeAffinityType {
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klog.V(2).InfoS("Executing for nodeAffinityType", "nodeAffinity", nodeAffinity)
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switch nodeAffinity {
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case "requiredDuringSchedulingIgnoredDuringExecution":
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for _, node := range nodes {
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klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
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pods, err := podutil.ListPodsOnANode(
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node.Name,
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getPodsAssignedToNode,
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podutil.WrapFilterFuncs(podFilter, func(pod *v1.Pod) bool {
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return evictorFilter.Filter(pod) &&
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!nodeutil.PodFitsCurrentNode(getPodsAssignedToNode, pod, node) &&
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nodeutil.PodFitsAnyNode(getPodsAssignedToNode, pod, nodes)
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}),
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)
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if err != nil {
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klog.ErrorS(err, "Failed to get pods", "node", klog.KObj(node))
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}
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for _, pod := range pods {
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if pod.Spec.Affinity != nil && pod.Spec.Affinity.NodeAffinity != nil && pod.Spec.Affinity.NodeAffinity.RequiredDuringSchedulingIgnoredDuringExecution != nil {
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klog.V(1).InfoS("Evicting pod", "pod", klog.KObj(pod))
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if _, err := podEvictor.EvictPod(ctx, pod, node); err != nil {
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klog.ErrorS(err, "Error evicting pod")
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break
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}
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}
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}
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}
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default:
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klog.ErrorS(nil, "Invalid nodeAffinityType", "nodeAffinity", nodeAffinity)
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}
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}
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}
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