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Remove RemovePodsViolatingNodeTaints strategy already migrated into a plugin

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This commit is contained in:
Jan Chaloupka
2022-07-28 16:34:42 +02:00
parent 0d3ff8a84f
commit 1294106a22
1 changed files with 0 additions and 117 deletions
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117
pkg/descheduler/strategies/node_taint.go
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@@ -1,117 +0,0 @@
/*
Copyright 2017 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 strategies
import (
"context"
"fmt"
"k8s.io/apimachinery/pkg/util/sets"
"sigs.k8s.io/descheduler/pkg/api"
"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
"sigs.k8s.io/descheduler/pkg/utils"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/klog/v2"
)
func validateRemovePodsViolatingNodeTaintsParams(params *api.StrategyParameters) error {
if params == nil {
return nil
}
// At most one of include/exclude can be set
if params.Namespaces != nil && len(params.Namespaces.Include) > 0 && len(params.Namespaces.Exclude) > 0 {
return fmt.Errorf("only one of Include/Exclude namespaces can be set")
}
if params.ThresholdPriority != nil && params.ThresholdPriorityClassName != "" {
return fmt.Errorf("only one of thresholdPriority and thresholdPriorityClassName can be set")
}
return nil
}
// RemovePodsViolatingNodeTaints evicts pods on the node which violate NoSchedule Taints on nodes
func RemovePodsViolatingNodeTaints(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor, evictorFilter *evictions.EvictorFilter, getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc) {
if err := validateRemovePodsViolatingNodeTaintsParams(strategy.Params); err != nil {
klog.ErrorS(err, "Invalid RemovePodsViolatingNodeTaints parameters")
return
}
var includedNamespaces, excludedNamespaces, excludedTaints sets.String
var labelSelector *metav1.LabelSelector
if strategy.Params != nil {
if strategy.Params.Namespaces != nil {
includedNamespaces = sets.NewString(strategy.Params.Namespaces.Include...)
excludedNamespaces = sets.NewString(strategy.Params.Namespaces.Exclude...)
}
if strategy.Params.ExcludedTaints != nil {
excludedTaints = sets.NewString(strategy.Params.ExcludedTaints...)
}
labelSelector = strategy.Params.LabelSelector
}
podFilter, err := podutil.NewOptions().
WithFilter(evictorFilter.Filter).
WithNamespaces(includedNamespaces).
WithoutNamespaces(excludedNamespaces).
WithLabelSelector(labelSelector).
BuildFilterFunc()
if err != nil {
klog.ErrorS(err, "Error initializing pod filter function")
return
}
excludeTaint := func(taint *v1.Taint) bool {
// Exclude taints by key *or* key=value
return excludedTaints.Has(taint.Key) || (taint.Value != "" && excludedTaints.Has(fmt.Sprintf("%s=%s", taint.Key, taint.Value)))
}
taintFilterFnc := func(taint *v1.Taint) bool { return (taint.Effect == v1.TaintEffectNoSchedule) && !excludeTaint(taint) }
if strategy.Params != nil && strategy.Params.IncludePreferNoSchedule {
taintFilterFnc = func(taint *v1.Taint) bool {
return (taint.Effect == v1.TaintEffectNoSchedule || taint.Effect == v1.TaintEffectPreferNoSchedule) && !excludeTaint(taint)
}
}
loop:
for _, node := range nodes {
klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
pods, err := podutil.ListAllPodsOnANode(node.Name, getPodsAssignedToNode, podFilter)
if err != nil {
//no pods evicted as error encountered retrieving evictable Pods
return
}
totalPods := len(pods)
for i := 0; i < totalPods; i++ {
if !utils.TolerationsTolerateTaintsWithFilter(
pods[i].Spec.Tolerations,
node.Spec.Taints,
taintFilterFnc,
) {
klog.V(2).InfoS("Not all taints with NoSchedule effect are tolerated after update for pod on node", "pod", klog.KObj(pods[i]), "node", klog.KObj(node))
podEvictor.EvictPod(ctx, pods[i], evictions.EvictOptions{})
if podEvictor.NodeLimitExceeded(node) {
continue loop
}
}
}
}
}