mirror of
https://github.com/kubernetes-sigs/descheduler.git
synced 2026-01-26 13:29:11 +01:00
Migrate PodLifeTime to plugin
This commit is contained in:
Amir Alavi
136
pkg/framework/plugins/podlifetime/pod_lifetime.go
Normal file
136
pkg/framework/plugins/podlifetime/pod_lifetime.go
Normal file
@@ -0,0 +1,136 @@
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/*
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Copyright 2022 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 podlifetime
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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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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/klog/v2"
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"sigs.k8s.io/descheduler/pkg/apis/componentconfig"
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"sigs.k8s.io/descheduler/pkg/framework"
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"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
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podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
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)
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const PluginName = "PodLifeTime"
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var (
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_ framework.Plugin = &PodLifeTime{}
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_ framework.DeschedulePlugin = &PodLifeTime{}
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)
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// PodLifeTime evicts pods on the node that violate the max pod lifetime threshold
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type PodLifeTime struct {
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handle framework.Handle
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args *componentconfig.PodLifeTimeArgs
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podFilter podutil.FilterFunc
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}
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// New builds plugin from its arguments while passing a handle
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func New(args runtime.Object, handle framework.Handle) (framework.Plugin, error) {
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podLifeTimeArgs, ok := args.(*componentconfig.PodLifeTimeArgs)
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if !ok {
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return nil, fmt.Errorf("want args to be of type PodLifeTimeArgs, got %T", args)
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}
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var includedNamespaces, excludedNamespaces sets.String
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if podLifeTimeArgs.Namespaces != nil {
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includedNamespaces = sets.NewString(podLifeTimeArgs.Namespaces.Include...)
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excludedNamespaces = sets.NewString(podLifeTimeArgs.Namespaces.Exclude...)
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}
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podFilter, err := podutil.NewOptions().
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WithFilter(handle.Evictor().Filter).
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WithNamespaces(includedNamespaces).
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WithoutNamespaces(excludedNamespaces).
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WithLabelSelector(podLifeTimeArgs.LabelSelector).
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BuildFilterFunc()
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if err != nil {
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return nil, fmt.Errorf("error initializing pod filter function: %v", err)
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}
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podFilter = podutil.WrapFilterFuncs(podFilter, func(pod *v1.Pod) bool {
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podAgeSeconds := uint(metav1.Now().Sub(pod.GetCreationTimestamp().Local()).Seconds())
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return podAgeSeconds > *podLifeTimeArgs.MaxPodLifeTimeSeconds
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})
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if len(podLifeTimeArgs.States) > 0 {
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states := sets.NewString(podLifeTimeArgs.States...)
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podFilter = podutil.WrapFilterFuncs(podFilter, func(pod *v1.Pod) bool {
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if states.Has(string(pod.Status.Phase)) {
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return true
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}
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for _, containerStatus := range pod.Status.ContainerStatuses {
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if containerStatus.State.Waiting != nil && states.Has(containerStatus.State.Waiting.Reason) {
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return true
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}
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}
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return false
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})
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}
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return &PodLifeTime{
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handle: handle,
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podFilter: podFilter,
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args: podLifeTimeArgs,
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}, nil
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}
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// Name retrieves the plugin name
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func (d *PodLifeTime) Name() string {
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return PluginName
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}
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// Deschedule extension point implementation for the plugin
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func (d *PodLifeTime) Deschedule(ctx context.Context, nodes []*v1.Node) *framework.Status {
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podsToEvict := make([]*v1.Pod, 0)
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nodeMap := make(map[string]*v1.Node, len(nodes))
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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.ListAllPodsOnANode(node.Name, d.handle.GetPodsAssignedToNodeFunc(), d.podFilter)
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if err != nil {
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// no pods evicted as error encountered retrieving evictable Pods
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return &framework.Status{
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Err: fmt.Errorf("error listing pods on a node: %v", err),
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}
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}
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nodeMap[node.Name] = node
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podsToEvict = append(podsToEvict, pods...)
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}
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// Should sort Pods so that the oldest can be evicted first
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// in the event that PDB or settings such maxNoOfPodsToEvictPer* prevent too much eviction
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podutil.SortPodsBasedOnAge(podsToEvict)
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for _, pod := range podsToEvict {
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if !d.handle.Evictor().NodeLimitExceeded(nodeMap[pod.Spec.NodeName]) {
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d.handle.Evictor().Evict(ctx, pod, evictions.EvictOptions{})
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}
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}
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return nil
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}
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385
pkg/framework/plugins/podlifetime/pod_lifetime_test.go
Normal file
385
pkg/framework/plugins/podlifetime/pod_lifetime_test.go
Normal file
@@ -0,0 +1,385 @@
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/*
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Copyright 2022 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 podlifetime
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import (
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"context"
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"testing"
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"time"
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v1 "k8s.io/api/core/v1"
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policyv1 "k8s.io/api/policy/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/client-go/informers"
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"k8s.io/client-go/kubernetes/fake"
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"k8s.io/client-go/tools/events"
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"sigs.k8s.io/descheduler/pkg/apis/componentconfig"
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"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
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podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
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"sigs.k8s.io/descheduler/pkg/framework"
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frameworkfake "sigs.k8s.io/descheduler/pkg/framework/fake"
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"sigs.k8s.io/descheduler/test"
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)
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func TestPodLifeTime(t *testing.T) {
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node1 := test.BuildTestNode("n1", 2000, 3000, 10, nil)
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olderPodCreationTime := metav1.NewTime(time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC))
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newerPodCreationTime := metav1.NewTime(time.Now())
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// Setup pods, one should be evicted
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p1 := test.BuildTestPod("p1", 100, 0, node1.Name, nil)
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p1.Namespace = "dev"
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p1.ObjectMeta.CreationTimestamp = newerPodCreationTime
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p2 := test.BuildTestPod("p2", 100, 0, node1.Name, nil)
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p2.Namespace = "dev"
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p2.ObjectMeta.CreationTimestamp = olderPodCreationTime
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ownerRef1 := test.GetReplicaSetOwnerRefList()
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p1.ObjectMeta.OwnerReferences = ownerRef1
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p2.ObjectMeta.OwnerReferences = ownerRef1
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// Setup pods, zero should be evicted
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p3 := test.BuildTestPod("p3", 100, 0, node1.Name, nil)
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p3.Namespace = "dev"
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p3.ObjectMeta.CreationTimestamp = newerPodCreationTime
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p4 := test.BuildTestPod("p4", 100, 0, node1.Name, nil)
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p4.Namespace = "dev"
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p4.ObjectMeta.CreationTimestamp = newerPodCreationTime
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ownerRef2 := test.GetReplicaSetOwnerRefList()
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p3.ObjectMeta.OwnerReferences = ownerRef2
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p4.ObjectMeta.OwnerReferences = ownerRef2
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// Setup pods, one should be evicted
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p5 := test.BuildTestPod("p5", 100, 0, node1.Name, nil)
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p5.Namespace = "dev"
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p5.ObjectMeta.CreationTimestamp = newerPodCreationTime
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p6 := test.BuildTestPod("p6", 100, 0, node1.Name, nil)
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p6.Namespace = "dev"
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p6.ObjectMeta.CreationTimestamp = metav1.NewTime(time.Now().Add(time.Second * 605))
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ownerRef3 := test.GetReplicaSetOwnerRefList()
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p5.ObjectMeta.OwnerReferences = ownerRef3
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p6.ObjectMeta.OwnerReferences = ownerRef3
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// Setup pods, zero should be evicted
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p7 := test.BuildTestPod("p7", 100, 0, node1.Name, nil)
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p7.Namespace = "dev"
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p7.ObjectMeta.CreationTimestamp = newerPodCreationTime
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p8 := test.BuildTestPod("p8", 100, 0, node1.Name, nil)
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p8.Namespace = "dev"
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p8.ObjectMeta.CreationTimestamp = metav1.NewTime(time.Now().Add(time.Second * 595))
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ownerRef4 := test.GetReplicaSetOwnerRefList()
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p5.ObjectMeta.OwnerReferences = ownerRef4
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p6.ObjectMeta.OwnerReferences = ownerRef4
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// Setup two old pods with different status phases
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p9 := test.BuildTestPod("p9", 100, 0, node1.Name, nil)
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p9.Namespace = "dev"
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p9.ObjectMeta.CreationTimestamp = olderPodCreationTime
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p10 := test.BuildTestPod("p10", 100, 0, node1.Name, nil)
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p10.Namespace = "dev"
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p10.ObjectMeta.CreationTimestamp = olderPodCreationTime
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p9.Status.Phase = "Pending"
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p10.Status.Phase = "Running"
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p9.ObjectMeta.OwnerReferences = ownerRef1
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p10.ObjectMeta.OwnerReferences = ownerRef1
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p11 := test.BuildTestPod("p11", 100, 0, node1.Name, func(pod *v1.Pod) {
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pod.Spec.Volumes = []v1.Volume{
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{
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Name: "pvc", VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{ClaimName: "foo"},
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},
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},
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}
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pod.Namespace = "dev"
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pod.ObjectMeta.CreationTimestamp = olderPodCreationTime
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pod.ObjectMeta.OwnerReferences = ownerRef1
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})
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// Setup two old pods with different labels
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p12 := test.BuildTestPod("p12", 100, 0, node1.Name, nil)
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p12.Namespace = "dev"
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p12.ObjectMeta.CreationTimestamp = olderPodCreationTime
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p13 := test.BuildTestPod("p13", 100, 0, node1.Name, nil)
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p13.Namespace = "dev"
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p13.ObjectMeta.CreationTimestamp = olderPodCreationTime
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p12.ObjectMeta.Labels = map[string]string{"foo": "bar"}
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p13.ObjectMeta.Labels = map[string]string{"foo": "bar1"}
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p12.ObjectMeta.OwnerReferences = ownerRef1
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p13.ObjectMeta.OwnerReferences = ownerRef1
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p14 := test.BuildTestPod("p14", 100, 0, node1.Name, nil)
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p15 := test.BuildTestPod("p15", 100, 0, node1.Name, nil)
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p14.Namespace = "dev"
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p15.Namespace = "dev"
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p14.ObjectMeta.CreationTimestamp = olderPodCreationTime
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p15.ObjectMeta.CreationTimestamp = olderPodCreationTime
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p14.ObjectMeta.OwnerReferences = ownerRef1
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p15.ObjectMeta.OwnerReferences = ownerRef1
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p14.DeletionTimestamp = &metav1.Time{}
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p15.DeletionTimestamp = &metav1.Time{}
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var maxLifeTime uint = 600
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testCases := []struct {
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description string
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args *componentconfig.PodLifeTimeArgs
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pods []*v1.Pod
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nodes []*v1.Node
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expectedEvictedPodCount uint
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ignorePvcPods bool
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maxPodsToEvictPerNode *uint
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maxPodsToEvictPerNamespace *uint
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}{
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{
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description: "Two pods in the `dev` Namespace, 1 is new and 1 very is old. 1 should be evicted.",
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args: &componentconfig.PodLifeTimeArgs{
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MaxPodLifeTimeSeconds: &maxLifeTime,
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},
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pods: []*v1.Pod{p1, p2},
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nodes: []*v1.Node{node1},
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expectedEvictedPodCount: 1,
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},
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{
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description: "Two pods in the `dev` Namespace, 2 are new and 0 are old. 0 should be evicted.",
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args: &componentconfig.PodLifeTimeArgs{
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MaxPodLifeTimeSeconds: &maxLifeTime,
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},
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pods: []*v1.Pod{p3, p4},
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nodes: []*v1.Node{node1},
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expectedEvictedPodCount: 0,
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},
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{
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description: "Two pods in the `dev` Namespace, 1 created 605 seconds ago. 1 should be evicted.",
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args: &componentconfig.PodLifeTimeArgs{
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MaxPodLifeTimeSeconds: &maxLifeTime,
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},
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pods: []*v1.Pod{p5, p6},
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nodes: []*v1.Node{node1},
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expectedEvictedPodCount: 1,
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},
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{
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description: "Two pods in the `dev` Namespace, 1 created 595 seconds ago. 0 should be evicted.",
|
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args: &componentconfig.PodLifeTimeArgs{
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MaxPodLifeTimeSeconds: &maxLifeTime,
|
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},
|
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pods: []*v1.Pod{p7, p8},
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nodes: []*v1.Node{node1},
|
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expectedEvictedPodCount: 0,
|
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},
|
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{
|
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description: "Two pods, one with ContainerCreating state. 1 should be evicted.",
|
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args: &componentconfig.PodLifeTimeArgs{
|
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MaxPodLifeTimeSeconds: &maxLifeTime,
|
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States: []string{"ContainerCreating"},
|
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},
|
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pods: []*v1.Pod{
|
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p9,
|
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test.BuildTestPod("container-creating-stuck", 0, 0, node1.Name, func(pod *v1.Pod) {
|
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pod.Status.ContainerStatuses = []v1.ContainerStatus{
|
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{
|
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State: v1.ContainerState{
|
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Waiting: &v1.ContainerStateWaiting{Reason: "ContainerCreating"},
|
||||
},
|
||||
},
|
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}
|
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pod.OwnerReferences = ownerRef1
|
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pod.ObjectMeta.CreationTimestamp = olderPodCreationTime
|
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}),
|
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},
|
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nodes: []*v1.Node{node1},
|
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expectedEvictedPodCount: 1,
|
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},
|
||||
{
|
||||
description: "Two pods, one with PodInitializing state. 1 should be evicted.",
|
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args: &componentconfig.PodLifeTimeArgs{
|
||||
MaxPodLifeTimeSeconds: &maxLifeTime,
|
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States: []string{"PodInitializing"},
|
||||
},
|
||||
pods: []*v1.Pod{
|
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p9,
|
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test.BuildTestPod("pod-initializing-stuck", 0, 0, node1.Name, func(pod *v1.Pod) {
|
||||
pod.Status.ContainerStatuses = []v1.ContainerStatus{
|
||||
{
|
||||
State: v1.ContainerState{
|
||||
Waiting: &v1.ContainerStateWaiting{Reason: "PodInitializing"},
|
||||
},
|
||||
},
|
||||
}
|
||||
pod.OwnerReferences = ownerRef1
|
||||
pod.ObjectMeta.CreationTimestamp = olderPodCreationTime
|
||||
}),
|
||||
},
|
||||
nodes: []*v1.Node{node1},
|
||||
expectedEvictedPodCount: 1,
|
||||
},
|
||||
{
|
||||
description: "Two old pods with different states. 1 should be evicted.",
|
||||
args: &componentconfig.PodLifeTimeArgs{
|
||||
MaxPodLifeTimeSeconds: &maxLifeTime,
|
||||
States: []string{"Pending"},
|
||||
},
|
||||
pods: []*v1.Pod{p9, p10},
|
||||
nodes: []*v1.Node{node1},
|
||||
expectedEvictedPodCount: 1,
|
||||
},
|
||||
{
|
||||
description: "does not evict pvc pods with ignorePvcPods set to true",
|
||||
args: &componentconfig.PodLifeTimeArgs{
|
||||
MaxPodLifeTimeSeconds: &maxLifeTime,
|
||||
},
|
||||
pods: []*v1.Pod{p11},
|
||||
nodes: []*v1.Node{node1},
|
||||
expectedEvictedPodCount: 0,
|
||||
ignorePvcPods: true,
|
||||
},
|
||||
{
|
||||
description: "evicts pvc pods with ignorePvcPods set to false (or unset)",
|
||||
args: &componentconfig.PodLifeTimeArgs{
|
||||
MaxPodLifeTimeSeconds: &maxLifeTime,
|
||||
},
|
||||
pods: []*v1.Pod{p11},
|
||||
nodes: []*v1.Node{node1},
|
||||
expectedEvictedPodCount: 1,
|
||||
},
|
||||
{
|
||||
description: "No pod to evicted since all pod terminating",
|
||||
args: &componentconfig.PodLifeTimeArgs{
|
||||
MaxPodLifeTimeSeconds: &maxLifeTime,
|
||||
LabelSelector: &metav1.LabelSelector{
|
||||
MatchLabels: map[string]string{"foo": "bar"},
|
||||
},
|
||||
},
|
||||
pods: []*v1.Pod{p12, p13},
|
||||
nodes: []*v1.Node{node1},
|
||||
expectedEvictedPodCount: 1,
|
||||
},
|
||||
{
|
||||
description: "No pod should be evicted since pod terminating",
|
||||
args: &componentconfig.PodLifeTimeArgs{
|
||||
MaxPodLifeTimeSeconds: &maxLifeTime,
|
||||
LabelSelector: &metav1.LabelSelector{
|
||||
MatchLabels: map[string]string{"foo": "bar"},
|
||||
},
|
||||
},
|
||||
pods: []*v1.Pod{p14, p15},
|
||||
nodes: []*v1.Node{node1},
|
||||
expectedEvictedPodCount: 0,
|
||||
},
|
||||
{
|
||||
description: "2 Oldest pods should be evicted when maxPodsToEvictPerNode and maxPodsToEvictPerNamespace are not set",
|
||||
args: &componentconfig.PodLifeTimeArgs{
|
||||
MaxPodLifeTimeSeconds: &maxLifeTime,
|
||||
},
|
||||
pods: []*v1.Pod{p1, p2, p9},
|
||||
nodes: []*v1.Node{node1},
|
||||
expectedEvictedPodCount: 2,
|
||||
maxPodsToEvictPerNode: nil,
|
||||
maxPodsToEvictPerNamespace: nil,
|
||||
},
|
||||
{
|
||||
description: "1 Oldest pod should be evicted when maxPodsToEvictPerNamespace is set to 1",
|
||||
args: &componentconfig.PodLifeTimeArgs{
|
||||
MaxPodLifeTimeSeconds: &maxLifeTime,
|
||||
},
|
||||
pods: []*v1.Pod{p1, p2, p9},
|
||||
nodes: []*v1.Node{node1},
|
||||
maxPodsToEvictPerNamespace: func(i uint) *uint { return &i }(1),
|
||||
expectedEvictedPodCount: 1,
|
||||
},
|
||||
{
|
||||
description: "1 Oldest pod should be evicted when maxPodsToEvictPerNode is set to 1",
|
||||
args: &componentconfig.PodLifeTimeArgs{
|
||||
MaxPodLifeTimeSeconds: &maxLifeTime,
|
||||
},
|
||||
pods: []*v1.Pod{p1, p2, p9},
|
||||
nodes: []*v1.Node{node1},
|
||||
maxPodsToEvictPerNode: func(i uint) *uint { return &i }(1),
|
||||
expectedEvictedPodCount: 1,
|
||||
},
|
||||
}
|
||||
|
||||
for _, tc := range testCases {
|
||||
t.Run(tc.description, func(t *testing.T) {
|
||||
ctx, cancel := context.WithCancel(context.Background())
|
||||
defer cancel()
|
||||
|
||||
var objs []runtime.Object
|
||||
for _, node := range tc.nodes {
|
||||
objs = append(objs, node)
|
||||
}
|
||||
for _, pod := range tc.pods {
|
||||
objs = append(objs, pod)
|
||||
}
|
||||
fakeClient := fake.NewSimpleClientset(objs...)
|
||||
|
||||
sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
|
||||
podInformer := sharedInformerFactory.Core().V1().Pods()
|
||||
|
||||
getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
|
||||
if err != nil {
|
||||
t.Errorf("Build get pods assigned to node function error: %v", err)
|
||||
}
|
||||
|
||||
sharedInformerFactory.Start(ctx.Done())
|
||||
sharedInformerFactory.WaitForCacheSync(ctx.Done())
|
||||
|
||||
eventRecorder := &events.FakeRecorder{}
|
||||
|
||||
podEvictor := evictions.NewPodEvictor(
|
||||
fakeClient,
|
||||
policyv1.SchemeGroupVersion.String(),
|
||||
false,
|
||||
tc.maxPodsToEvictPerNode,
|
||||
tc.maxPodsToEvictPerNamespace,
|
||||
tc.nodes,
|
||||
false,
|
||||
eventRecorder,
|
||||
)
|
||||
|
||||
evictorFilter := evictions.NewEvictorFilter(
|
||||
tc.nodes,
|
||||
getPodsAssignedToNode,
|
||||
false,
|
||||
false,
|
||||
tc.ignorePvcPods,
|
||||
false,
|
||||
)
|
||||
|
||||
plugin, err := New(tc.args, &frameworkfake.HandleImpl{
|
||||
ClientsetImpl: fakeClient,
|
||||
PodEvictorImpl: podEvictor,
|
||||
EvictorFilterImpl: evictorFilter,
|
||||
GetPodsAssignedToNodeFuncImpl: getPodsAssignedToNode,
|
||||
})
|
||||
if err != nil {
|
||||
t.Fatalf("Unable to initialize the plugin: %v", err)
|
||||
}
|
||||
|
||||
plugin.(framework.DeschedulePlugin).Deschedule(ctx, tc.nodes)
|
||||
podsEvicted := podEvictor.TotalEvicted()
|
||||
if podsEvicted != tc.expectedEvictedPodCount {
|
||||
t.Errorf("Test error for description: %s. Expected evicted pods count %v, got %v", tc.description, tc.expectedEvictedPodCount, podsEvicted)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user