Migrate RemovePodsHavingTooManyRestarts to plugin

pkg/apis/componentconfig/types_pluginargs.go

@@ -57,3 +57,15 @@ type RemovePodsViolatingNodeAffinityArgs struct {
 	LabelSelector    *metav1.LabelSelector
 	NodeAffinityType []string
 }
+
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+
+// RemovePodsHavingTooManyRestartsArgs holds arguments used to configure RemovePodsHavingTooManyRestarts plugin.
+type RemovePodsHavingTooManyRestartsArgs struct {
+	metav1.TypeMeta
+
+	Namespaces              *api.Namespaces
+	LabelSelector           *metav1.LabelSelector
+	PodRestartThreshold     int32
+	IncludingInitContainers bool
+}

pkg/apis/componentconfig/validation/validation_pluginargs.go

@@ -18,9 +18,9 @@ package validation
 
 import (
 	"fmt"
-	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/apis/componentconfig"
 )
@@ -41,6 +41,15 @@ func ValidateRemoveFailedPodsArgs(args *componentconfig.RemoveFailedPodsArgs) er
 	)
 }
 
+// ValidateRemovePodsHavingTooManyRestartsArgs validates RemovePodsHavingTooManyRestarts arguments
+func ValidateRemovePodsHavingTooManyRestartsArgs(args *componentconfig.RemovePodsHavingTooManyRestartsArgs) error {
+	return errorsAggregate(
+		validateNamespaceArgs(args.Namespaces),
+		validateLabelSelectorArgs(args.LabelSelector),
+		validatePodRestartThreshold(args.PodRestartThreshold),
+	)
+}
+
 // errorsAggregate converts all arg validation errors to a single error interface.
 // if no errors, it will return nil.
 func errorsAggregate(errors ...error) error {
@@ -76,6 +85,12 @@ func ValidateRemovePodsViolatingNodeAffinityArgs(args *componentconfig.RemovePod
 	if args.Namespaces != nil && len(args.Namespaces.Include) > 0 && len(args.Namespaces.Exclude) > 0 {
 		return fmt.Errorf("only one of Include/Exclude namespaces can be set")
 	}
-
+	return nil
+}
+
+func validatePodRestartThreshold(podRestartThreshold int32) error {
+	if podRestartThreshold < 1 {
+		return fmt.Errorf("PodsHavingTooManyRestarts threshold not set")
+	}
 	return nil
 }

pkg/apis/componentconfig/zz_generated.deepcopy.go

@@ -104,6 +104,41 @@ func (in *RemoveFailedPodsArgs) DeepCopyObject() runtime.Object {
 	return nil
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *RemovePodsHavingTooManyRestartsArgs) DeepCopyInto(out *RemovePodsHavingTooManyRestartsArgs) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	if in.Namespaces != nil {
+		in, out := &in.Namespaces, &out.Namespaces
+		*out = new(api.Namespaces)
+		(*in).DeepCopyInto(*out)
+	}
+	if in.LabelSelector != nil {
+		in, out := &in.LabelSelector, &out.LabelSelector
+		*out = new(v1.LabelSelector)
+		(*in).DeepCopyInto(*out)
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new RemovePodsHavingTooManyRestartsArgs.
+func (in *RemovePodsHavingTooManyRestartsArgs) DeepCopy() *RemovePodsHavingTooManyRestartsArgs {
+	if in == nil {
+		return nil
+	}
+	out := new(RemovePodsHavingTooManyRestartsArgs)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *RemovePodsHavingTooManyRestartsArgs) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *RemovePodsViolatingNodeAffinityArgs) DeepCopyInto(out *RemovePodsViolatingNodeAffinityArgs) {
 	*out = *in

pkg/descheduler/descheduler.go

@@ -251,7 +251,7 @@ func RunDeschedulerStrategies(ctx context.Context, rs *options.DeschedulerServer
 		"RemovePodsViolatingInterPodAntiAffinity":     strategies.RemovePodsViolatingInterPodAntiAffinity,
 		"RemovePodsViolatingNodeAffinity":             nil,
 		"RemovePodsViolatingNodeTaints":               nil,
-		"RemovePodsHavingTooManyRestarts":             strategies.RemovePodsHavingTooManyRestarts,
+		"RemovePodsHavingTooManyRestarts":             nil,
 		"PodLifeTime":                                 strategies.PodLifeTime,
 		"RemovePodsViolatingTopologySpreadConstraint": strategies.RemovePodsViolatingTopologySpreadConstraint,
 		"RemoveFailedPods":                            nil,

pkg/descheduler/strategies/toomanyrestarts.go

@@ -1,114 +0,0 @@
-/*
-Copyright 2018 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"
-
-	v1 "k8s.io/api/core/v1"
-	"k8s.io/apimachinery/pkg/util/sets"
-	clientset "k8s.io/client-go/kubernetes"
-	"k8s.io/klog/v2"
-
-	"sigs.k8s.io/descheduler/pkg/api"
-	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
-	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
-)
-
-func validateRemovePodsHavingTooManyRestartsParams(params *api.StrategyParameters) error {
-	if params == nil || params.PodsHavingTooManyRestarts == nil || params.PodsHavingTooManyRestarts.PodRestartThreshold < 1 {
-		return fmt.Errorf("PodsHavingTooManyRestarts threshold not set")
-	}
-
-	// 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
-}
-
-// RemovePodsHavingTooManyRestarts removes the pods that have too many restarts on node.
-// There are too many cases leading this issue: Volume mount failed, app error due to nodes' different settings.
-// As of now, this strategy won't evict daemonsets, mirror pods, critical pods and pods with local storages.
-func RemovePodsHavingTooManyRestarts(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor, evictorFilter *evictions.EvictorFilter, getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc) {
-	if err := validateRemovePodsHavingTooManyRestartsParams(strategy.Params); err != nil {
-		klog.ErrorS(err, "Invalid RemovePodsHavingTooManyRestarts parameters")
-		return
-	}
-
-	var includedNamespaces, excludedNamespaces sets.String
-	if strategy.Params.Namespaces != nil {
-		includedNamespaces = sets.NewString(strategy.Params.Namespaces.Include...)
-		excludedNamespaces = sets.NewString(strategy.Params.Namespaces.Exclude...)
-	}
-
-	podFilter, err := podutil.NewOptions().
-		WithFilter(evictorFilter.Filter).
-		WithNamespaces(includedNamespaces).
-		WithoutNamespaces(excludedNamespaces).
-		WithLabelSelector(strategy.Params.LabelSelector).
-		BuildFilterFunc()
-	if err != nil {
-		klog.ErrorS(err, "Error initializing pod filter function")
-		return
-	}
-
-loop:
-	for _, node := range nodes {
-		klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
-		pods, err := podutil.ListPodsOnANode(node.Name, getPodsAssignedToNode, podFilter)
-		if err != nil {
-			klog.ErrorS(err, "Error listing a nodes pods", "node", klog.KObj(node))
-			continue
-		}
-
-		for i, pod := range pods {
-			restarts, initRestarts := calcContainerRestarts(pod)
-			if strategy.Params.PodsHavingTooManyRestarts.IncludingInitContainers {
-				if restarts+initRestarts < strategy.Params.PodsHavingTooManyRestarts.PodRestartThreshold {
-					continue
-				}
-			} else if restarts < strategy.Params.PodsHavingTooManyRestarts.PodRestartThreshold {
-				continue
-			}
-			podEvictor.EvictPod(ctx, pods[i], evictions.EvictOptions{})
-			if podEvictor.NodeLimitExceeded(node) {
-				continue loop
-			}
-		}
-	}
-}
-
-// calcContainerRestarts get container restarts and init container restarts.
-func calcContainerRestarts(pod *v1.Pod) (int32, int32) {
-	var restarts, initRestarts int32
-
-	for _, cs := range pod.Status.ContainerStatuses {
-		restarts += cs.RestartCount
-	}
-
-	for _, cs := range pod.Status.InitContainerStatuses {
-		initRestarts += cs.RestartCount
-	}
-
-	return restarts, initRestarts
-}

pkg/descheduler/strategy_migration.go

@@ -26,6 +26,7 @@ import (
 	"sigs.k8s.io/descheduler/pkg/apis/componentconfig/validation"
 	"sigs.k8s.io/descheduler/pkg/framework"
 	"sigs.k8s.io/descheduler/pkg/framework/plugins/removefailedpods"
+	"sigs.k8s.io/descheduler/pkg/framework/plugins/removepodshavingtoomanyrestarts"
 	"sigs.k8s.io/descheduler/pkg/framework/plugins/removepodsviolatingnodeaffinity"
 	"sigs.k8s.io/descheduler/pkg/framework/plugins/removepodsviolatingnodetaints"
 )
@@ -103,4 +104,29 @@ var pluginsMap = map[string]func(ctx context.Context, nodes []*v1.Node, params *
 			klog.V(1).ErrorS(err, "plugin finished with error", "pluginName", removepodsviolatingnodeaffinity.PluginName)
 		}
 	},
+	"RemovePodsHavingTooManyRestarts": func(ctx context.Context, nodes []*v1.Node, params *api.StrategyParameters, handle *handleImpl) {
+		tooManyRestartsParams := params.PodsHavingTooManyRestarts
+		if tooManyRestartsParams == nil {
+			tooManyRestartsParams = &api.PodsHavingTooManyRestarts{}
+		}
+		args := &componentconfig.RemovePodsHavingTooManyRestartsArgs{
+			Namespaces:              params.Namespaces,
+			LabelSelector:           params.LabelSelector,
+			PodRestartThreshold:     tooManyRestartsParams.PodRestartThreshold,
+			IncludingInitContainers: tooManyRestartsParams.IncludingInitContainers,
+		}
+		if err := validation.ValidateRemovePodsHavingTooManyRestartsArgs(args); err != nil {
+			klog.V(1).ErrorS(err, "unable to validate plugin arguments", "pluginName", removepodshavingtoomanyrestarts.PluginName)
+			return
+		}
+		pg, err := removepodshavingtoomanyrestarts.New(args, handle)
+		if err != nil {
+			klog.V(1).ErrorS(err, "unable to initialize a plugin", "pluginName", removepodshavingtoomanyrestarts.PluginName)
+			return
+		}
+		status := pg.(framework.DeschedulePlugin).Deschedule(ctx, nodes)
+		if status != nil && status.Err != nil {
+			klog.V(1).ErrorS(err, "plugin finished with error", "pluginName", removepodshavingtoomanyrestarts.PluginName)
+		}
+	},
 }

pkg/framework/plugins/removepodshavingtoomanyrestarts/toomanyrestarts.go

@@ -0,0 +1,138 @@
+/*
+Copyright 2022 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 removepodshavingtoomanyrestarts
+
+import (
+	"context"
+	"fmt"
+
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/util/sets"
+	"k8s.io/klog/v2"
+
+	"sigs.k8s.io/descheduler/pkg/apis/componentconfig"
+	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
+	"sigs.k8s.io/descheduler/pkg/framework"
+)
+
+const PluginName = "RemovePodsHavingTooManyRestarts"
+
+// RemovePodsHavingTooManyRestarts removes the pods that have too many restarts on node.
+// There are too many cases leading this issue: Volume mount failed, app error due to nodes' different settings.
+// As of now, this strategy won't evict daemonsets, mirror pods, critical pods and pods with local storages.
+type RemovePodsHavingTooManyRestarts struct {
+	handle    framework.Handle
+	args      *componentconfig.RemovePodsHavingTooManyRestartsArgs
+	podFilter podutil.FilterFunc
+}
+
+var (
+	_ framework.Plugin           = &RemovePodsHavingTooManyRestarts{}
+	_ framework.DeschedulePlugin = &RemovePodsHavingTooManyRestarts{}
+)
+
+// New builds plugin from its arguments while passing a handle
+func New(args runtime.Object, handle framework.Handle) (framework.Plugin, error) {
+	tooManyRestartsArgs, ok := args.(*componentconfig.RemovePodsHavingTooManyRestartsArgs)
+	if !ok {
+		return nil, fmt.Errorf("want args to be of type RemovePodsHavingTooManyRestartsArgs, got %T", args)
+	}
+
+	var includedNamespaces, excludedNamespaces sets.String
+	if tooManyRestartsArgs.Namespaces != nil {
+		includedNamespaces = sets.NewString(tooManyRestartsArgs.Namespaces.Include...)
+		excludedNamespaces = sets.NewString(tooManyRestartsArgs.Namespaces.Exclude...)
+	}
+
+	podFilter, err := podutil.NewOptions().
+		WithFilter(handle.Evictor().Filter).
+		WithNamespaces(includedNamespaces).
+		WithoutNamespaces(excludedNamespaces).
+		WithLabelSelector(tooManyRestartsArgs.LabelSelector).
+		BuildFilterFunc()
+	if err != nil {
+		return nil, fmt.Errorf("error initializing pod filter function: %v", err)
+	}
+
+	podFilter = podutil.WrapFilterFuncs(podFilter, func(pod *v1.Pod) bool {
+		if err := validateCanEvict(pod, tooManyRestartsArgs); err != nil {
+			klog.V(4).InfoS(fmt.Sprintf("ignoring pod for eviction due to: %s", err.Error()), "pod", klog.KObj(pod))
+			return false
+		}
+		return true
+	})
+
+	return &RemovePodsHavingTooManyRestarts{
+		handle:    handle,
+		args:      tooManyRestartsArgs,
+		podFilter: podFilter,
+	}, nil
+}
+
+// Name retrieves the plugin name
+func (d *RemovePodsHavingTooManyRestarts) Name() string {
+	return PluginName
+}
+
+// Deschedule extension point implementation for the plugin
+func (d *RemovePodsHavingTooManyRestarts) Deschedule(ctx context.Context, nodes []*v1.Node) *framework.Status {
+	for _, node := range nodes {
+		klog.V(1).InfoS("Processing node", "node", klog.KObj(node))
+		pods, err := podutil.ListAllPodsOnANode(node.Name, d.handle.GetPodsAssignedToNodeFunc(), d.podFilter)
+		if err != nil {
+			// no pods evicted as error encountered retrieving evictable Pods
+			return &framework.Status{
+				Err: fmt.Errorf("error listing pods on a node: %v", err),
+			}
+		}
+		totalPods := len(pods)
+		for i := 0; i < totalPods; i++ {
+			d.handle.Evictor().Evict(ctx, pods[i], evictions.EvictOptions{})
+			if d.handle.Evictor().NodeLimitExceeded(node) {
+				break
+			}
+		}
+	}
+	return nil
+}
+
+// validateCanEvict looks at tooManyRestartsArgs to see if pod can be evicted given the args.
+func validateCanEvict(pod *v1.Pod, tooManyRestartsArgs *componentconfig.RemovePodsHavingTooManyRestartsArgs) error {
+	var err error
+
+	restarts := calcContainerRestartsFromStatuses(pod.Status.ContainerStatuses)
+	if tooManyRestartsArgs.IncludingInitContainers {
+		restarts += calcContainerRestartsFromStatuses(pod.Status.InitContainerStatuses)
+	}
+
+	if restarts < tooManyRestartsArgs.PodRestartThreshold {
+		err = fmt.Errorf("number of container restarts (%v) not exceeding the threshold", restarts)
+	}
+
+	return err
+}
+
+// calcContainerRestartsFromStatuses get container restarts from container statuses.
+func calcContainerRestartsFromStatuses(statuses []v1.ContainerStatus) int32 {
+	var restarts int32
+	for _, cs := range statuses {
+		restarts += cs.RestartCount
+	}
+	return restarts
+}

pkg/framework/plugins/removepodshavingtoomanyrestarts/toomanyrestarts_test.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2018 The Kubernetes Authors.
+Copyright 2022 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.
@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package strategies
+package removepodshavingtoomanyrestarts
 
 import (
 	"context"
@@ -29,9 +29,11 @@ import (
 	"k8s.io/client-go/kubernetes/fake"
 	"k8s.io/client-go/tools/events"
 
-	"sigs.k8s.io/descheduler/pkg/api"
+	"sigs.k8s.io/descheduler/pkg/apis/componentconfig"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
 	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
+	"sigs.k8s.io/descheduler/pkg/framework"
+	frameworkfake "sigs.k8s.io/descheduler/pkg/framework/fake"
 	"sigs.k8s.io/descheduler/test"
 )
 
@@ -103,16 +105,13 @@ func TestRemovePodsHavingTooManyRestarts(t *testing.T) {
 
 	pods := append(append(initPods(node1), test.BuildTestPod("CPU-consumer-1", 150, 100, node4.Name, nil)), test.BuildTestPod("CPU-consumer-2", 150, 100, node5.Name, nil))
 
-	createStrategy := func(enabled, includingInitContainers bool, restartThresholds int32, nodeFit bool) api.DeschedulerStrategy {
-		return api.DeschedulerStrategy{
-			Enabled: enabled,
-			Params: &api.StrategyParameters{
-				PodsHavingTooManyRestarts: &api.PodsHavingTooManyRestarts{
-					PodRestartThreshold:     restartThresholds,
-					IncludingInitContainers: includingInitContainers,
-				},
-				NodeFit: nodeFit,
-			},
+	createRemovePodsHavingTooManyRestartsAgrs := func(
+		podRestartThresholds int32,
+		includingInitContainers bool,
+	) componentconfig.RemovePodsHavingTooManyRestartsArgs {
+		return componentconfig.RemovePodsHavingTooManyRestartsArgs{
+			PodRestartThreshold:     podRestartThresholds,
+			IncludingInitContainers: includingInitContainers,
 		}
 	}
 
@@ -121,100 +120,106 @@ func TestRemovePodsHavingTooManyRestarts(t *testing.T) {
 	tests := []struct {
 		description                    string
 		nodes                          []*v1.Node
-		strategy                       api.DeschedulerStrategy
+		args                           componentconfig.RemovePodsHavingTooManyRestartsArgs
 		expectedEvictedPodCount        uint
 		maxPodsToEvictPerNode          *uint
 		maxNoOfPodsToEvictPerNamespace *uint
+		nodeFit                        bool
 	}{
 		{
 			description:             "All pods have total restarts under threshold, no pod evictions",
-			strategy:                createStrategy(true, true, 10000, false),
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(10000, true),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 0,
 		},
 		{
 			description:             "Some pods have total restarts bigger than threshold",
-			strategy:                createStrategy(true, true, 1, false),
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(1, true),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 6,
 		},
 		{
 			description:             "Nine pods have total restarts equals threshold(includingInitContainers=true), 6 pod evictions",
-			strategy:                createStrategy(true, true, 1*25, false),
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(1*25, true),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 6,
 		},
 		{
 			description:             "Nine pods have total restarts equals threshold(includingInitContainers=false), 5 pod evictions",
-			strategy:                createStrategy(true, false, 1*25, false),
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(1*25, false),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 5,
 		},
 		{
 			description:             "All pods have total restarts equals threshold(includingInitContainers=true), 6 pod evictions",
-			strategy:                createStrategy(true, true, 1*20, false),
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(1*20, true),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 6,
 		},
 		{
 			description:             "Nine pods have total restarts equals threshold(includingInitContainers=false), 6 pod evictions",
-			strategy:                createStrategy(true, false, 1*20, false),
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(1*20, false),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 6,
 		},
 		{
 			description:             "Five pods have total restarts bigger than threshold(includingInitContainers=true), but only 1 pod eviction",
-			strategy:                createStrategy(true, true, 5*25+1, false),
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(5*25+1, true),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
 		{
 			description:             "Five pods have total restarts bigger than threshold(includingInitContainers=false), but only 1 pod eviction",
-			strategy:                createStrategy(true, false, 5*20+1, false),
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(5*20+1, false),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
+			nodeFit:                 false,
 		},
 		{
 			description:             "All pods have total restarts equals threshold(maxPodsToEvictPerNode=3), 3 pod evictions",
-			strategy:                createStrategy(true, true, 1, false),
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(1, true),
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 3,
 			maxPodsToEvictPerNode:   &uint3,
 		},
 		{
 			description:                    "All pods have total restarts equals threshold(maxNoOfPodsToEvictPerNamespace=3), 3 pod evictions",
-			strategy:                       createStrategy(true, true, 1, false),
+			args:                           createRemovePodsHavingTooManyRestartsAgrs(1, true),
 			nodes:                          []*v1.Node{node1},
 			expectedEvictedPodCount:        3,
 			maxNoOfPodsToEvictPerNamespace: &uint3,
 		},
 		{
 			description:             "All pods have total restarts equals threshold(maxPodsToEvictPerNode=3) but the only other node is tained, 0 pod evictions",
-			strategy:                createStrategy(true, true, 1, true),
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(1, true),
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
 			maxPodsToEvictPerNode:   &uint3,
+			nodeFit:                 true,
 		},
 		{
 			description:             "All pods have total restarts equals threshold(maxPodsToEvictPerNode=3) but the only other node is not schedulable, 0 pod evictions",
-			strategy:                createStrategy(true, true, 1, true),
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(1, true),
 			nodes:                   []*v1.Node{node1, node3},
 			expectedEvictedPodCount: 0,
 			maxPodsToEvictPerNode:   &uint3,
+			nodeFit:                 true,
 		},
 		{
 			description:             "All pods have total restarts equals threshold(maxPodsToEvictPerNode=3) but the only other node does not have enough CPU, 0 pod evictions",
-			strategy:                createStrategy(true, true, 1, true),
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(1, true),
 			nodes:                   []*v1.Node{node1, node4},
 			expectedEvictedPodCount: 0,
 			maxPodsToEvictPerNode:   &uint3,
+			nodeFit:                 true,
 		},
 		{
 			description:             "All pods have total restarts equals threshold(maxPodsToEvictPerNode=3) but the only other node has enough CPU, 3 pod evictions",
-			strategy:                createStrategy(true, true, 1, true),
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(1, true),
 			nodes:                   []*v1.Node{node1, node5},
 			expectedEvictedPodCount: 3,
 			maxPodsToEvictPerNode:   &uint3,
+			nodeFit:                 true,
 		},
 	}
 
@@ -264,10 +269,23 @@ func TestRemovePodsHavingTooManyRestarts(t *testing.T) {
 				false,
 				false,
 				false,
-				evictions.WithNodeFit(tc.strategy.Params.NodeFit),
+				evictions.WithNodeFit(tc.nodeFit),
 			)
 
-			RemovePodsHavingTooManyRestarts(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor, evictorFilter, getPodsAssignedToNode)
+			plugin, err := New(
+				&tc.args,
+				&frameworkfake.HandleImpl{
+					ClientsetImpl:                 fakeClient,
+					PodEvictorImpl:                podEvictor,
+					EvictorFilterImpl:             evictorFilter,
+					SharedInformerFactoryImpl:     sharedInformerFactory,
+					GetPodsAssignedToNodeFuncImpl: getPodsAssignedToNode,
+				})
+			if err != nil {
+				t.Fatalf("Unable to initialize the plugin: %v", err)
+			}
+
+			plugin.(framework.DeschedulePlugin).Deschedule(ctx, tc.nodes)
 			actualEvictedPodCount := podEvictor.TotalEvicted()
 			if actualEvictedPodCount != tc.expectedEvictedPodCount {
 				t.Errorf("Test %#v failed, expected %v pod evictions, but got %v pod evictions\n", tc.description, tc.expectedEvictedPodCount, actualEvictedPodCount)

test/e2e/e2e_toomanyrestarts_test.go

@@ -30,16 +30,19 @@ import (
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/tools/events"
 	"k8s.io/utils/pointer"
-	deschedulerapi "sigs.k8s.io/descheduler/pkg/api"
+
+	"sigs.k8s.io/descheduler/pkg/apis/componentconfig"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
 	eutils "sigs.k8s.io/descheduler/pkg/descheduler/evictions/utils"
-	"sigs.k8s.io/descheduler/pkg/descheduler/strategies"
+	"sigs.k8s.io/descheduler/pkg/framework"
+	frameworkfake "sigs.k8s.io/descheduler/pkg/framework/fake"
+	"sigs.k8s.io/descheduler/pkg/framework/plugins/removepodshavingtoomanyrestarts"
 )
 
 func TestTooManyRestarts(t *testing.T) {
 	ctx := context.Background()
 
-	clientSet, _, _, getPodsAssignedToNode, stopCh := initializeClient(t)
+	clientSet, sharedInformerFactory, _, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)
 
 	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
@@ -107,22 +110,29 @@ func TestTooManyRestarts(t *testing.T) {
 		t.Fatal("Pod restart count not as expected")
 	}
 
+	createRemovePodsHavingTooManyRestartsAgrs := func(
+		podRestartThresholds int32,
+		includingInitContainers bool,
+	) componentconfig.RemovePodsHavingTooManyRestartsArgs {
+		return componentconfig.RemovePodsHavingTooManyRestartsArgs{
+			PodRestartThreshold:     podRestartThresholds,
+			IncludingInitContainers: includingInitContainers,
+		}
+	}
+
 	tests := []struct {
 		name                    string
-		podRestartThreshold     int32
-		includingInitContainers bool
+		args                    componentconfig.RemovePodsHavingTooManyRestartsArgs
 		expectedEvictedPodCount uint
 	}{
 		{
 			name:                    "test-no-evictions",
-			podRestartThreshold:     int32(10000),
-			includingInitContainers: true,
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(10000, true),
 			expectedEvictedPodCount: 0,
 		},
 		{
 			name:                    "test-one-evictions",
-			podRestartThreshold:     int32(4),
-			includingInitContainers: true,
+			args:                    createRemovePodsHavingTooManyRestartsAgrs(4, true),
 			expectedEvictedPodCount: 4,
 		},
 	}
@@ -146,32 +156,32 @@ func TestTooManyRestarts(t *testing.T) {
 				eventRecorder,
 			)
 
+			evictorFilter := evictions.NewEvictorFilter(
+				nodes,
+				getPodsAssignedToNode,
+				true,
+				false,
+				false,
+				false,
+			)
+
+			plugin, err := removepodshavingtoomanyrestarts.New(
+				&tc.args,
+				&frameworkfake.HandleImpl{
+					ClientsetImpl:                 clientSet,
+					PodEvictorImpl:                podEvictor,
+					EvictorFilterImpl:             evictorFilter,
+					SharedInformerFactoryImpl:     sharedInformerFactory,
+					GetPodsAssignedToNodeFuncImpl: getPodsAssignedToNode,
+				})
+			if err != nil {
+				t.Fatalf("Unable to initialize the plugin: %v", err)
+			}
+
 			// Run RemovePodsHavingTooManyRestarts strategy
 			t.Log("Running RemovePodsHavingTooManyRestarts strategy")
-			strategies.RemovePodsHavingTooManyRestarts(
-				ctx,
-				clientSet,
-				deschedulerapi.DeschedulerStrategy{
-					Enabled: true,
-					Params: &deschedulerapi.StrategyParameters{
-						PodsHavingTooManyRestarts: &deschedulerapi.PodsHavingTooManyRestarts{
-							PodRestartThreshold:     tc.podRestartThreshold,
-							IncludingInitContainers: tc.includingInitContainers,
-						},
-					},
-				},
-				workerNodes,
-				podEvictor,
-				evictions.NewEvictorFilter(
-					nodes,
-					getPodsAssignedToNode,
-					true,
-					false,
-					false,
-					false,
-				),
-				getPodsAssignedToNode,
-			)
+			plugin.(framework.DeschedulePlugin).Deschedule(ctx, workerNodes)
+			t.Logf("Finished RemoveFailedPods strategy for %s", tc.name)
 
 			waitForTerminatingPodsToDisappear(ctx, t, clientSet, testNamespace.Name)
 			actualEvictedPodCount := podEvictor.TotalEvicted()