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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
test/e2e/e2e_test.go
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@@ -40,6 +40,7 @@ import (
clientset "k8s.io/client-go/kubernetes"
listersv1 "k8s.io/client-go/listers/core/v1"
componentbaseconfig "k8s.io/component-base/config"
"k8s.io/component-base/featuregate"
"k8s.io/klog/v2"
utilptr "k8s.io/utils/ptr"
"sigs.k8s.io/yaml"
@@ -54,6 +55,7 @@ import (
eutils "sigs.k8s.io/descheduler/pkg/descheduler/evictions/utils"
nodeutil "sigs.k8s.io/descheduler/pkg/descheduler/node"
podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
"sigs.k8s.io/descheduler/pkg/features"
"sigs.k8s.io/descheduler/pkg/framework/pluginregistry"
"sigs.k8s.io/descheduler/pkg/framework/plugins/defaultevictor"
"sigs.k8s.io/descheduler/pkg/framework/plugins/nodeutilization"
@@ -68,6 +70,14 @@ func isClientRateLimiterError(err error) bool {
return strings.Contains(err.Error(), "client rate limiter")
}
func initFeatureGates() featuregate.FeatureGate {
featureGates := featuregate.NewFeatureGate()
featureGates.Add(map[featuregate.Feature]featuregate.FeatureSpec{
features.EvictionsInBackground: {Default: false, PreRelease: featuregate.Alpha},
})
return featureGates
}
func deschedulerPolicyConfigMap(policy *deschedulerapiv1alpha2.DeschedulerPolicy) (*v1.ConfigMap, error) {
cm := &v1.ConfigMap{
ObjectMeta: metav1.ObjectMeta{
@@ -1344,6 +1354,7 @@ func TestDeschedulingInterval(t *testing.T) {
t.Fatalf("Unable to initialize server: %v", err)
}
s.Client = clientSet
s.DefaultFeatureGates = initFeatureGates()
deschedulerPolicy := &deschedulerapi.DeschedulerPolicy{}