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Introduce RequestEviction feature for evicting pods in background

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When the feature is enabled each pod with descheduler.alpha.kubernetes.io/request-evict-only
annotation will have the eviction API error examined for a specific
error code/reason and message. If matched eviction of such a pod will be interpreted
as initiation of an eviction in background.
This commit is contained in:
Jan Chaloupka
2024-08-30 09:07:27 +02:00
parent f115e780d8
commit 3a1a3ff9d8
11 changed files with 1405 additions and 77 deletions
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11
pkg/framework/testing/utils.go
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@@ -7,10 +7,12 @@ import (
v1 "k8s.io/api/core/v1"
"k8s.io/client-go/informers"
"k8s.io/client-go/tools/events"
"k8s.io/component-base/featuregate"
clientset "k8s.io/client-go/kubernetes"
"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
"sigs.k8s.io/descheduler/pkg/features"
frameworkfake "sigs.k8s.io/descheduler/pkg/framework/fake"
"sigs.k8s.io/descheduler/pkg/framework/plugins/defaultevictor"
frameworktypes "sigs.k8s.io/descheduler/pkg/framework/types"
@@ -44,7 +46,14 @@ func InitFrameworkHandle(
sharedInformerFactory.Start(ctx.Done())
sharedInformerFactory.WaitForCacheSync(ctx.Done())
eventRecorder := &events.FakeRecorder{}
podEvictor := evictions.NewPodEvictor(client, eventRecorder, evictionOptions)
featureGates := featuregate.NewFeatureGate()
featureGates.Add(map[featuregate.Feature]featuregate.FeatureSpec{
features.EvictionsInBackground: {Default: false, PreRelease: featuregate.Alpha},
})
podEvictor, err := evictions.NewPodEvictor(ctx, client, eventRecorder, podInformer, featureGates, evictionOptions)
if err != nil {
return nil, nil, fmt.Errorf("Unable to initialize pod evictor: %v", err)
}
evictorFilter, err := defaultevictor.New(
&defaultEvictorArgs,
&frameworkfake.HandleImpl{