ListPodsOnANode: allow to include/exclude namespaces

Info: field selector is still not properly mocked so it's not possible to unit test it

pkg/api/types.go

@@ -44,13 +44,23 @@ type DeschedulerStrategy struct {
 	Params *StrategyParameters
 }
 
-// Only one of its members may be specified
+// Namespaces carries a list of included/excluded namespaces
+// for which a given strategy is applicable
+type Namespaces struct {
+	Include []string
+	Exclude []string
+}
+
+// Besides Namespaces only one of its members may be specified
+// TODO(jchaloup): move Namespaces to individual strategies once the policy
+// version is bumped to v1alpha2
 type StrategyParameters struct {
 	NodeResourceUtilizationThresholds *NodeResourceUtilizationThresholds
 	NodeAffinityType                  []string
 	PodsHavingTooManyRestarts         *PodsHavingTooManyRestarts
 	MaxPodLifeTimeSeconds             *uint
 	RemoveDuplicates                  *RemoveDuplicates
+	Namespaces                        Namespaces
 }
 
 type Percentage float64

pkg/api/v1alpha1/types.go

@@ -44,13 +44,21 @@ type DeschedulerStrategy struct {
 	Params *StrategyParameters `json:"params,omitempty"`
 }
 
-// Only one of its members may be specified
+// Namespaces carries a list of included/excluded namespaces
+// for which a given strategy is applicable.
+type Namespaces struct {
+	Include []string `json:"include"`
+	Exclude []string `json:"exclude"`
+}
+
+// Besides Namespaces only one of its members may be specified
 type StrategyParameters struct {
 	NodeResourceUtilizationThresholds *NodeResourceUtilizationThresholds `json:"nodeResourceUtilizationThresholds,omitempty"`
 	NodeAffinityType                  []string                           `json:"nodeAffinityType,omitempty"`
 	PodsHavingTooManyRestarts         *PodsHavingTooManyRestarts         `json:"podsHavingTooManyRestarts,omitempty"`
 	MaxPodLifeTimeSeconds             *uint                              `json:"maxPodLifeTimeSeconds,omitempty"`
 	RemoveDuplicates                  *RemoveDuplicates                  `json:"removeDuplicates,omitempty"`
+	Namespaces                        Namespaces                         `json:"namespaces"`
 }
 
 type Percentage float64

pkg/api/v1alpha1/zz_generated.conversion.go

@@ -55,6 +55,16 @@ func RegisterConversions(s *runtime.Scheme) error {
 	}); err != nil {
 		return err
 	}
+	if err := s.AddGeneratedConversionFunc((*Namespaces)(nil), (*api.Namespaces)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_v1alpha1_Namespaces_To_api_Namespaces(a.(*Namespaces), b.(*api.Namespaces), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddGeneratedConversionFunc((*api.Namespaces)(nil), (*Namespaces)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_api_Namespaces_To_v1alpha1_Namespaces(a.(*api.Namespaces), b.(*Namespaces), scope)
+	}); err != nil {
+		return err
+	}
 	if err := s.AddGeneratedConversionFunc((*NodeResourceUtilizationThresholds)(nil), (*api.NodeResourceUtilizationThresholds)(nil), func(a, b interface{}, scope conversion.Scope) error {
 		return Convert_v1alpha1_NodeResourceUtilizationThresholds_To_api_NodeResourceUtilizationThresholds(a.(*NodeResourceUtilizationThresholds), b.(*api.NodeResourceUtilizationThresholds), scope)
 	}); err != nil {
@@ -142,6 +152,28 @@ func Convert_api_DeschedulerStrategy_To_v1alpha1_DeschedulerStrategy(in *api.Des
 	return autoConvert_api_DeschedulerStrategy_To_v1alpha1_DeschedulerStrategy(in, out, s)
 }
 
+func autoConvert_v1alpha1_Namespaces_To_api_Namespaces(in *Namespaces, out *api.Namespaces, s conversion.Scope) error {
+	out.Include = *(*[]string)(unsafe.Pointer(&in.Include))
+	out.Exclude = *(*[]string)(unsafe.Pointer(&in.Exclude))
+	return nil
+}
+
+// Convert_v1alpha1_Namespaces_To_api_Namespaces is an autogenerated conversion function.
+func Convert_v1alpha1_Namespaces_To_api_Namespaces(in *Namespaces, out *api.Namespaces, s conversion.Scope) error {
+	return autoConvert_v1alpha1_Namespaces_To_api_Namespaces(in, out, s)
+}
+
+func autoConvert_api_Namespaces_To_v1alpha1_Namespaces(in *api.Namespaces, out *Namespaces, s conversion.Scope) error {
+	out.Include = *(*[]string)(unsafe.Pointer(&in.Include))
+	out.Exclude = *(*[]string)(unsafe.Pointer(&in.Exclude))
+	return nil
+}
+
+// Convert_api_Namespaces_To_v1alpha1_Namespaces is an autogenerated conversion function.
+func Convert_api_Namespaces_To_v1alpha1_Namespaces(in *api.Namespaces, out *Namespaces, s conversion.Scope) error {
+	return autoConvert_api_Namespaces_To_v1alpha1_Namespaces(in, out, s)
+}
+
 func autoConvert_v1alpha1_NodeResourceUtilizationThresholds_To_api_NodeResourceUtilizationThresholds(in *NodeResourceUtilizationThresholds, out *api.NodeResourceUtilizationThresholds, s conversion.Scope) error {
 	out.Thresholds = *(*api.ResourceThresholds)(unsafe.Pointer(&in.Thresholds))
 	out.TargetThresholds = *(*api.ResourceThresholds)(unsafe.Pointer(&in.TargetThresholds))
@@ -214,6 +246,9 @@ func autoConvert_v1alpha1_StrategyParameters_To_api_StrategyParameters(in *Strat
 	out.PodsHavingTooManyRestarts = (*api.PodsHavingTooManyRestarts)(unsafe.Pointer(in.PodsHavingTooManyRestarts))
 	out.MaxPodLifeTimeSeconds = (*uint)(unsafe.Pointer(in.MaxPodLifeTimeSeconds))
 	out.RemoveDuplicates = (*api.RemoveDuplicates)(unsafe.Pointer(in.RemoveDuplicates))
+	if err := Convert_v1alpha1_Namespaces_To_api_Namespaces(&in.Namespaces, &out.Namespaces, s); err != nil {
+		return err
+	}
 	return nil
 }
 
@@ -228,6 +263,9 @@ func autoConvert_api_StrategyParameters_To_v1alpha1_StrategyParameters(in *api.S
 	out.PodsHavingTooManyRestarts = (*PodsHavingTooManyRestarts)(unsafe.Pointer(in.PodsHavingTooManyRestarts))
 	out.MaxPodLifeTimeSeconds = (*uint)(unsafe.Pointer(in.MaxPodLifeTimeSeconds))
 	out.RemoveDuplicates = (*RemoveDuplicates)(unsafe.Pointer(in.RemoveDuplicates))
+	if err := Convert_api_Namespaces_To_v1alpha1_Namespaces(&in.Namespaces, &out.Namespaces, s); err != nil {
+		return err
+	}
 	return nil
 }
 

pkg/api/v1alpha1/zz_generated.deepcopy.go

@@ -77,6 +77,32 @@ func (in *DeschedulerStrategy) DeepCopy() *DeschedulerStrategy {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *Namespaces) DeepCopyInto(out *Namespaces) {
+	*out = *in
+	if in.Include != nil {
+		in, out := &in.Include, &out.Include
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	if in.Exclude != nil {
+		in, out := &in.Exclude, &out.Exclude
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Namespaces.
+func (in *Namespaces) DeepCopy() *Namespaces {
+	if in == nil {
+		return nil
+	}
+	out := new(Namespaces)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *NodeResourceUtilizationThresholds) DeepCopyInto(out *NodeResourceUtilizationThresholds) {
 	*out = *in
@@ -216,6 +242,7 @@ func (in *StrategyParameters) DeepCopyInto(out *StrategyParameters) {
 		*out = new(RemoveDuplicates)
 		(*in).DeepCopyInto(*out)
 	}
+	in.Namespaces.DeepCopyInto(&out.Namespaces)
 	return
 }
 

pkg/api/zz_generated.deepcopy.go

@@ -77,6 +77,32 @@ func (in *DeschedulerStrategy) DeepCopy() *DeschedulerStrategy {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *Namespaces) DeepCopyInto(out *Namespaces) {
+	*out = *in
+	if in.Include != nil {
+		in, out := &in.Include, &out.Include
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	if in.Exclude != nil {
+		in, out := &in.Exclude, &out.Exclude
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Namespaces.
+func (in *Namespaces) DeepCopy() *Namespaces {
+	if in == nil {
+		return nil
+	}
+	out := new(Namespaces)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *NodeResourceUtilizationThresholds) DeepCopyInto(out *NodeResourceUtilizationThresholds) {
 	*out = *in
@@ -216,6 +242,7 @@ func (in *StrategyParameters) DeepCopyInto(out *StrategyParameters) {
 		*out = new(RemoveDuplicates)
 		(*in).DeepCopyInto(*out)
 	}
+	in.Namespaces.DeepCopyInto(&out.Namespaces)
 	return
 }
 

pkg/descheduler/pod/pods.go

@@ -28,7 +28,9 @@ import (
 )
 
 type Options struct {
-	filter func(pod *v1.Pod) bool
+	filter             func(pod *v1.Pod) bool
+	includedNamespaces []string
+	excludedNamespaces []string
 }
 
 // WithFilter sets a pod filter.
@@ -39,6 +41,20 @@ func WithFilter(filter func(pod *v1.Pod) bool) func(opts *Options) {
 	}
 }
 
+// WithNamespaces sets included namespaces
+func WithNamespaces(namespaces []string) func(opts *Options) {
+	return func(opts *Options) {
+		opts.includedNamespaces = namespaces
+	}
+}
+
+// WithoutNamespaces sets excluded namespaces
+func WithoutNamespaces(namespaces []string) func(opts *Options) {
+	return func(opts *Options) {
+		opts.excludedNamespaces = namespaces
+	}
+}
+
 // ListPodsOnANode lists all of the pods on a node
 // It also accepts an optional "filter" function which can be used to further limit the pods that are returned.
 // (Usually this is podEvictor.IsEvictable, in order to only list the evictable pods on a node, but can
@@ -54,18 +70,52 @@ func ListPodsOnANode(
 		opt(options)
 	}
 
-	fieldSelector, err := fields.ParseSelector("spec.nodeName=" + node.Name + ",status.phase!=" + string(v1.PodSucceeded) + ",status.phase!=" + string(v1.PodFailed))
+	pods := make([]*v1.Pod, 0)
+
+	fieldSelectorString := "spec.nodeName=" + node.Name + ",status.phase!=" + string(v1.PodSucceeded) + ",status.phase!=" + string(v1.PodFailed)
+
+	if len(options.includedNamespaces) > 0 {
+		fieldSelector, err := fields.ParseSelector(fieldSelectorString)
+		if err != nil {
+			return []*v1.Pod{}, err
+		}
+
+		for _, namespace := range options.includedNamespaces {
+			podList, err := client.CoreV1().Pods(namespace).List(ctx,
+				metav1.ListOptions{FieldSelector: fieldSelector.String()})
+			if err != nil {
+				return []*v1.Pod{}, err
+			}
+			for i := range podList.Items {
+				if options.filter != nil && !options.filter(&podList.Items[i]) {
+					continue
+				}
+				pods = append(pods, &podList.Items[i])
+			}
+		}
+		return pods, nil
+	}
+
+	if len(options.excludedNamespaces) > 0 {
+		for _, namespace := range options.excludedNamespaces {
+			fieldSelectorString += ",metadata.namespace!=" + namespace
+		}
+	}
+
+	fieldSelector, err := fields.ParseSelector(fieldSelectorString)
 	if err != nil {
 		return []*v1.Pod{}, err
 	}
 
+	// INFO(jchaloup): field selectors do not work properly with listers
+	// Once the descheduler switcheds to pod listers (through informers),
+	// We need to flip to client-side filtering.
 	podList, err := client.CoreV1().Pods(v1.NamespaceAll).List(ctx,
 		metav1.ListOptions{FieldSelector: fieldSelector.String()})
 	if err != nil {
 		return []*v1.Pod{}, err
 	}
 
-	pods := make([]*v1.Pod, 0)
 	for i := range podList.Items {
 		if options.filter != nil && !options.filter(&podList.Items[i]) {
 			continue

pkg/descheduler/strategies/node_affinity.go

@@ -18,6 +18,7 @@ package strategies
 
 import (
 	"context"
+	"fmt"
 
 	v1 "k8s.io/api/core/v1"
 	clientset "k8s.io/client-go/kubernetes"
@@ -29,10 +30,22 @@ import (
 	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 )
 
+func validatePodsViolatingNodeAffinityParams(params *api.StrategyParameters) error {
+	if params == nil || len(params.NodeAffinityType) == 0 {
+		return fmt.Errorf("NodeAffinityType is empty")
+	}
+	// At most one of include/exclude can be set
+	if len(params.Namespaces.Include) > 0 && len(params.Namespaces.Exclude) > 0 {
+		return fmt.Errorf("only one of Include/Exclude namespaces can be set")
+	}
+
+	return nil
+}
+
 // RemovePodsViolatingNodeAffinity evicts pods on nodes which violate node affinity
 func RemovePodsViolatingNodeAffinity(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor) {
-	if strategy.Params == nil {
+	if err := validatePodsViolatingNodeAffinityParams(strategy.Params); err != nil {
-		klog.V(1).Infof("NodeAffinityType not set")
+		klog.V(1).Info(err)
 		return
 	}
 	for _, nodeAffinity := range strategy.Params.NodeAffinityType {
@@ -43,11 +56,18 @@ func RemovePodsViolatingNodeAffinity(ctx context.Context, client clientset.Inter
 			for _, node := range nodes {
 				klog.V(1).Infof("Processing node: %#v\n", node.Name)
 
-				pods, err := podutil.ListPodsOnANode(ctx, client, node, podutil.WithFilter(func(pod *v1.Pod) bool {
+				pods, err := podutil.ListPodsOnANode(
-					return podEvictor.IsEvictable(pod) &&
+					ctx,
-						!nodeutil.PodFitsCurrentNode(pod, node) &&
+					client,
-						nodeutil.PodFitsAnyNode(pod, nodes)
+					node,
-				}))
+					podutil.WithFilter(func(pod *v1.Pod) bool {
+						return podEvictor.IsEvictable(pod) &&
+							!nodeutil.PodFitsCurrentNode(pod, node) &&
+							nodeutil.PodFitsAnyNode(pod, nodes)
+					}),
+					podutil.WithNamespaces(strategy.Params.Namespaces.Include),
+					podutil.WithoutNamespaces(strategy.Params.Namespaces.Exclude),
+				)
 				if err != nil {
 					klog.Errorf("failed to get pods from %v: %v", node.Name, err)
 				}

pkg/descheduler/strategies/node_taint.go

@@ -18,6 +18,7 @@ package strategies
 
 import (
 	"context"
+	"fmt"
 
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
@@ -29,11 +30,40 @@ import (
 	"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 len(params.Namespaces.Include) > 0 && len(params.Namespaces.Exclude) > 0 {
+		return fmt.Errorf("only one of Include/Exclude namespaces 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) {
+	if err := validateRemovePodsViolatingNodeTaintsParams(strategy.Params); err != nil {
+		klog.V(1).Info(err)
+		return
+	}
+	var namespaces api.Namespaces
+	if strategy.Params != nil {
+		namespaces = strategy.Params.Namespaces
+	}
+
 	for _, node := range nodes {
 		klog.V(1).Infof("Processing node: %#v\n", node.Name)
-		pods, err := podutil.ListPodsOnANode(ctx, client, node, podutil.WithFilter(podEvictor.IsEvictable))
+		pods, err := podutil.ListPodsOnANode(
+			ctx,
+			client,
+			node,
+			podutil.WithFilter(podEvictor.IsEvictable),
+			podutil.WithNamespaces(namespaces.Include),
+			podutil.WithoutNamespaces(namespaces.Exclude),
+		)
 		if err != nil {
 			//no pods evicted as error encountered retrieving evictable Pods
 			return

pkg/descheduler/strategies/pod_antiaffinity.go

@@ -18,6 +18,7 @@ package strategies
 
 import (
 	"context"
+	"fmt"
 
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
@@ -30,11 +31,36 @@ import (
 	"k8s.io/klog/v2"
 )
 
+func validateRemovePodsViolatingInterPodAntiAffinityParams(params *api.StrategyParameters) error {
+	if params == nil {
+		return nil
+	}
+
+	// At most one of include/exclude can be set
+	if len(params.Namespaces.Include) > 0 && len(params.Namespaces.Exclude) > 0 {
+		return fmt.Errorf("only one of Include/Exclude namespaces can be set")
+	}
+
+	return nil
+}
+
 // RemovePodsViolatingInterPodAntiAffinity evicts pods on the node which are having a pod affinity rules.
 func RemovePodsViolatingInterPodAntiAffinity(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor) {
+	var namespaces api.Namespaces
+	if strategy.Params != nil {
+		namespaces = strategy.Params.Namespaces
+	}
+
 	for _, node := range nodes {
 		klog.V(1).Infof("Processing node: %#v\n", node.Name)
-		pods, err := podutil.ListPodsOnANode(ctx, client, node, podutil.WithFilter(podEvictor.IsEvictable))
+		pods, err := podutil.ListPodsOnANode(
+			ctx,
+			client,
+			node,
+			podutil.WithFilter(podEvictor.IsEvictable),
+			podutil.WithNamespaces(namespaces.Include),
+			podutil.WithoutNamespaces(namespaces.Exclude),
+		)
 		if err != nil {
 			return
 		}

pkg/descheduler/strategies/pod_lifetime.go

@@ -18,6 +18,7 @@ package strategies
 
 import (
 	"context"
+	"fmt"
 
 	v1 "k8s.io/api/core/v1"
 	v1meta "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -29,16 +30,30 @@ import (
 	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 )
 
+func validatePodLifeTimeParams(params *api.StrategyParameters) error {
+	if params == nil || params.MaxPodLifeTimeSeconds == nil {
+		return fmt.Errorf("MaxPodLifeTimeSeconds not set")
+	}
+
+	// At most one of include/exclude can be set
+	if len(params.Namespaces.Include) > 0 && len(params.Namespaces.Exclude) > 0 {
+		return fmt.Errorf("only one of Include/Exclude namespaces can be set")
+	}
+
+	return nil
+}
+
 // PodLifeTime evicts pods on nodes that were created more than strategy.Params.MaxPodLifeTimeSeconds seconds ago.
 func PodLifeTime(ctx context.Context, client clientset.Interface, strategy api.DeschedulerStrategy, nodes []*v1.Node, podEvictor *evictions.PodEvictor) {
-	if strategy.Params == nil || strategy.Params.MaxPodLifeTimeSeconds == nil {
+	if err := validatePodLifeTimeParams(strategy.Params); err != nil {
-		klog.V(1).Infof("MaxPodLifeTimeSeconds not set")
+		klog.V(1).Info(err)
 		return
 	}
 
 	for _, node := range nodes {
 		klog.V(1).Infof("Processing node: %#v", node.Name)
-		pods := listOldPodsOnNode(ctx, client, node, *strategy.Params.MaxPodLifeTimeSeconds, podEvictor)
+
+		pods := listOldPodsOnNode(ctx, client, node, strategy.Params, podEvictor)
 		for _, pod := range pods {
 			success, err := podEvictor.EvictPod(ctx, pod, node, "PodLifeTime")
 			if success {
@@ -50,11 +65,19 @@ func PodLifeTime(ctx context.Context, client clientset.Interface, strategy api.D
 				break
 			}
 		}
+
 	}
 }
 
-func listOldPodsOnNode(ctx context.Context, client clientset.Interface, node *v1.Node, maxAge uint, evictor *evictions.PodEvictor) []*v1.Pod {
+func listOldPodsOnNode(ctx context.Context, client clientset.Interface, node *v1.Node, params *api.StrategyParameters, evictor *evictions.PodEvictor) []*v1.Pod {
-	pods, err := podutil.ListPodsOnANode(ctx, client, node, podutil.WithFilter(evictor.IsEvictable))
+	pods, err := podutil.ListPodsOnANode(
+		ctx,
+		client,
+		node,
+		podutil.WithFilter(evictor.IsEvictable),
+		podutil.WithNamespaces(params.Namespaces.Include),
+		podutil.WithoutNamespaces(params.Namespaces.Exclude),
+	)
 	if err != nil {
 		return nil
 	}
@@ -62,7 +85,7 @@ func listOldPodsOnNode(ctx context.Context, client clientset.Interface, node *v1
 	var oldPods []*v1.Pod
 	for _, pod := range pods {
 		podAgeSeconds := uint(v1meta.Now().Sub(pod.GetCreationTimestamp().Local()).Seconds())
-		if podAgeSeconds > maxAge {
+		if podAgeSeconds > *params.MaxPodLifeTimeSeconds {
 			oldPods = append(oldPods, pod)
 		}
 	}

pkg/descheduler/strategies/toomanyrestarts.go

@@ -18,6 +18,7 @@ package strategies
 
 import (
 	"context"
+	"fmt"
 
 	v1 "k8s.io/api/core/v1"
 	clientset "k8s.io/client-go/kubernetes"
@@ -28,17 +29,37 @@ import (
 	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 len(params.Namespaces.Include) > 0 && len(params.Namespaces.Exclude) > 0 {
+		return fmt.Errorf("only one of Include/Exclude namespaces 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) {
-	if strategy.Params == nil || strategy.Params.PodsHavingTooManyRestarts == nil || strategy.Params.PodsHavingTooManyRestarts.PodRestartThreshold < 1 {
+	if err := validateRemovePodsHavingTooManyRestartsParams(strategy.Params); err != nil {
-		klog.V(1).Infof("PodsHavingTooManyRestarts thresholds not set")
+		klog.V(1).Info(err)
 		return
 	}
 	for _, node := range nodes {
 		klog.V(1).Infof("Processing node: %s", node.Name)
-		pods, err := podutil.ListPodsOnANode(ctx, client, node, podutil.WithFilter(podEvictor.IsEvictable))
+		pods, err := podutil.ListPodsOnANode(
+			ctx,
+			client,
+			node,
+			podutil.WithFilter(podEvictor.IsEvictable),
+			podutil.WithNamespaces(strategy.Params.Namespaces.Include),
+			podutil.WithoutNamespaces(strategy.Params.Namespaces.Exclude),
+		)
 		if err != nil {
 			klog.Errorf("Error when list pods at node %s", node.Name)
 			continue