Merge pull request #954 from spike-liu/master

Plugin arguments defaulting + moving plugin arguments to each corresponding plugin #925

pkg/framework/plugins/removepodsviolatingtopologyspreadconstraint/defaults.go

@@ -0,0 +1,36 @@
+/*
+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 removepodsviolatingtopologyspreadconstraint
+
+import (
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+func addDefaultingFuncs(scheme *runtime.Scheme) error {
+	return RegisterDefaults(scheme)
+}
+
+// SetDefaults_RemovePodsViolatingTopologySpreadConstraintArgs
+// TODO: the final default values would be discussed in community
+func SetDefaults_RemovePodsViolatingTopologySpreadConstraintArgs(obj *RemovePodsViolatingTopologySpreadConstraintArgs) {
+	if obj.Namespaces == nil {
+		obj.Namespaces = nil
+	}
+	if obj.LabelSelector == nil {
+		obj.LabelSelector = nil
+	}
+	if !obj.IncludeSoftConstraints {
+		obj.IncludeSoftConstraints = false
+	}
+}

pkg/framework/plugins/removepodsviolatingtopologyspreadconstraint/defaults_test.go

@@ -0,0 +1,64 @@
+/*
+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 removepodsviolatingtopologyspreadconstraint
+
+import (
+	"github.com/google/go-cmp/cmp"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
+	"sigs.k8s.io/descheduler/pkg/api"
+	"testing"
+)
+
+func TestSetDefaults_RemovePodsViolatingTopologySpreadConstraintArgs(t *testing.T) {
+	tests := []struct {
+		name string
+		in   runtime.Object
+		want runtime.Object
+	}{
+		{
+			name: "RemovePodsViolatingTopologySpreadConstraintArgs empty",
+			in:   &RemovePodsViolatingTopologySpreadConstraintArgs{},
+			want: &RemovePodsViolatingTopologySpreadConstraintArgs{
+				Namespaces:             nil,
+				LabelSelector:          nil,
+				IncludeSoftConstraints: false,
+			},
+		},
+		{
+			name: "RemovePodsViolatingTopologySpreadConstraintArgs with value",
+			in: &RemovePodsViolatingTopologySpreadConstraintArgs{
+				Namespaces:             &api.Namespaces{},
+				LabelSelector:          &metav1.LabelSelector{},
+				IncludeSoftConstraints: true,
+			},
+			want: &RemovePodsViolatingTopologySpreadConstraintArgs{
+				Namespaces:             &api.Namespaces{},
+				LabelSelector:          &metav1.LabelSelector{},
+				IncludeSoftConstraints: true,
+			},
+		},
+	}
+	for _, tc := range tests {
+		scheme := runtime.NewScheme()
+		utilruntime.Must(AddToScheme(scheme))
+		t.Run(tc.name, func(t *testing.T) {
+			scheme.Default(tc.in)
+			if diff := cmp.Diff(tc.in, tc.want); diff != "" {
+				t.Errorf("Got unexpected defaults (-want, +got):\n%s", diff)
+			}
+		})
+	}
+}

pkg/framework/plugins/removepodsviolatingtopologyspreadconstraint/doc.go

@@ -0,0 +1,16 @@
+/*
+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.
+*/
+
+// +k8s:defaulter-gen=TypeMeta
+
+package removepodsviolatingtopologyspreadconstraint

pkg/framework/plugins/removepodsviolatingtopologyspreadconstraint/register.go

@@ -0,0 +1,31 @@
+/*
+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 removepodsviolatingtopologyspreadconstraint
+
+import (
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+var (
+	SchemeBuilder      = runtime.NewSchemeBuilder()
+	localSchemeBuilder = &SchemeBuilder
+	AddToScheme        = localSchemeBuilder.AddToScheme
+)
+
+func init() {
+	// We only register manually written functions here. The registration of the
+	// generated functions takes place in the generated files. The separation
+	// makes the code compile even when the generated files are missing.
+	localSchemeBuilder.Register(addDefaultingFuncs)
+}

pkg/framework/plugins/removepodsviolatingtopologyspreadconstraint/topologyspreadconstraint.go

@@ -27,7 +27,6 @@ import (
 	"k8s.io/apimachinery/pkg/util/sets"
 	"k8s.io/klog/v2"
 
-	"sigs.k8s.io/descheduler/pkg/apis/componentconfig"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
 	"sigs.k8s.io/descheduler/pkg/descheduler/node"
 	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
@@ -51,7 +50,7 @@ type topology struct {
 // RemovePodsViolatingTopologySpreadConstraint evicts pods which violate their topology spread constraints
 type RemovePodsViolatingTopologySpreadConstraint struct {
 	handle    framework.Handle
-	args      *componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs
+	args      *RemovePodsViolatingTopologySpreadConstraintArgs
 	podFilter podutil.FilterFunc
 }
 
@@ -59,7 +58,7 @@ var _ framework.BalancePlugin = &RemovePodsViolatingTopologySpreadConstraint{}
 
 // New builds plugin from its arguments while passing a handle
 func New(args runtime.Object, handle framework.Handle) (framework.Plugin, error) {
-	pluginArgs, ok := args.(*componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs)
+	pluginArgs, ok := args.(*RemovePodsViolatingTopologySpreadConstraintArgs)
 	if !ok {
 		return nil, fmt.Errorf("want args to be of type RemovePodsViolatingTopologySpreadConstraintArgs, got %T", args)
 	}

pkg/framework/plugins/removepodsviolatingtopologyspreadconstraint/topologyspreadconstraint_test.go

@@ -16,7 +16,6 @@ import (
 	"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"
@@ -33,7 +32,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 		expectedEvictedPods  []string // if specified, will assert specific pods were evicted
 		nodes                []*v1.Node
 		namespaces           []string
-		args                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs
+		args                 RemovePodsViolatingTopologySpreadConstraintArgs
 		nodeFit              bool
 	}{
 		{
@@ -69,7 +68,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 0,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "2 domains, sizes [3,1], maxSkew=1, move 1 pod to achieve [2,2]",
@@ -97,7 +96,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 1,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "2 domains, sizes [3,1], maxSkew=1, move 1 pod to achieve [2,2] (soft constraints)",
@@ -132,7 +131,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 1,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{IncludeSoftConstraints: true},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{IncludeSoftConstraints: true},
 		},
 		{
 			name: "2 domains, sizes [3,1], maxSkew=1, no pods eligible, move 0 pods",
@@ -163,7 +162,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 0,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "2 domains, sizes [3,1], maxSkew=1, move 1 pod to achieve [2,2], exclude kube-system namespace",
@@ -191,7 +190,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 1,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{Namespaces: &api.Namespaces{Exclude: []string{"kube-system"}}},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{Namespaces: &api.Namespaces{Exclude: []string{"kube-system"}}},
 			nodeFit:              true,
 		},
 		{
@@ -220,7 +219,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 1,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "2 domains, sizes [4,0], maxSkew=1, move 2 pods to achieve [2,2]",
@@ -243,7 +242,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 2,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "2 domains, sizes [4,0], maxSkew=1, only move 1 pod since pods with nodeSelector and nodeAffinity aren't evicted",
@@ -283,7 +282,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 1,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 			nodeFit:              true,
 		},
 		{
@@ -327,7 +326,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 2,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "3 domains, sizes [0, 1, 100], maxSkew=1, move 66 pods to get [34, 33, 34]",
@@ -351,7 +350,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 66,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "4 domains, sizes [0, 1, 3, 5], should move 3 to get [2, 2, 3, 2]",
@@ -381,7 +380,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 3,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "2 domains size [2 6], maxSkew=2, should move 1 to get [3 5]",
@@ -409,7 +408,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 1,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "2 domains size [2 6], maxSkew=2, can't move any because of node taints",
@@ -453,7 +452,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 0,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 			nodeFit:              true,
 		},
 		{
@@ -482,7 +481,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 0,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 			nodeFit:              true,
 		},
 		{
@@ -588,7 +587,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 1,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{IncludeSoftConstraints: true},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{IncludeSoftConstraints: true},
 		},
 		{
 			name: "3 domains size [8 7 0], maxSkew=1, should move 5 to get [5 5 5]",
@@ -614,7 +613,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			expectedEvictedCount: 5,
 			expectedEvictedPods:  []string{"pod-5", "pod-6", "pod-7", "pod-8"},
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "3 domains size [5 5 5], maxSkew=1, should move 0 to retain [5 5 5]",
@@ -645,7 +644,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 0,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "2 domains, sizes [2,0], maxSkew=1, move 1 pod since pod tolerates the node with taint",
@@ -687,7 +686,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			expectedEvictedCount: 1,
 			expectedEvictedPods:  []string{"pod-0"},
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "2 domains, sizes [2,0], maxSkew=1, move 0 pods since pod does not tolerate the tainted node",
@@ -720,7 +719,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 0,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "2 domains, sizes [2,0], maxSkew=1, move 0 pods since pod does not tolerate the tainted node, and NodeFit is enabled",
@@ -753,7 +752,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 0,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 			nodeFit:              true,
 		},
 		{
@@ -788,7 +787,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			expectedEvictedCount: 1,
 			expectedEvictedPods:  []string{"pod-0"},
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 		},
 		{
 			name: "2 domains, sizes [2,0], maxSkew=1, move 0 pod for node with unmatched label filtering",
@@ -811,7 +810,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 0,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{LabelSelector: getLabelSelector("foo", []string{"baz"}, metav1.LabelSelectorOpIn)},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{LabelSelector: getLabelSelector("foo", []string{"baz"}, metav1.LabelSelectorOpIn)},
 		},
 		{
 			name: "2 domains, sizes [2,0], maxSkew=1, move 1 pod for node with matched label filtering",
@@ -835,7 +834,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			expectedEvictedCount: 1,
 			expectedEvictedPods:  []string{"pod-1"},
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{LabelSelector: getLabelSelector("foo", []string{"bar"}, metav1.LabelSelectorOpIn)},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{LabelSelector: getLabelSelector("foo", []string{"bar"}, metav1.LabelSelectorOpIn)},
 		},
 		{
 			name: "2 domains, sizes [2,0], maxSkew=1, move 1 pod for node with matched label filtering (NotIn op)",
@@ -859,7 +858,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			expectedEvictedCount: 1,
 			expectedEvictedPods:  []string{"pod-1"},
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{LabelSelector: getLabelSelector("foo", []string{"baz"}, metav1.LabelSelectorOpNotIn)},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{LabelSelector: getLabelSelector("foo", []string{"baz"}, metav1.LabelSelectorOpNotIn)},
 		},
 		{
 			name: "2 domains, sizes [4,2], maxSkew=1, 2 pods in termination; nothing should be moved",
@@ -890,7 +889,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 0,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{LabelSelector: getLabelSelector("foo", []string{"bar"}, metav1.LabelSelectorOpIn)},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{LabelSelector: getLabelSelector("foo", []string{"bar"}, metav1.LabelSelectorOpIn)},
 		},
 		{
 			name: "3 domains, sizes [2,3,4], maxSkew=1, NodeFit is enabled, and not enough cpu on zoneA; nothing should be moved",
@@ -921,7 +920,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 0,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 			nodeFit:              true,
 		},
 		{
@@ -968,7 +967,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 0,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 			nodeFit:              true,
 		},
 		{
@@ -1008,7 +1007,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			expectedEvictedCount: 1,
 			expectedEvictedPods:  []string{"pod-4"},
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 			nodeFit:              true,
 		},
 		{
@@ -1115,7 +1114,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 			}),
 			expectedEvictedCount: 0,
 			namespaces:           []string{"ns1"},
-			args:                 componentconfig.RemovePodsViolatingTopologySpreadConstraintArgs{},
+			args:                 RemovePodsViolatingTopologySpreadConstraintArgs{},
 			nodeFit:              true,
 		},
 	}

pkg/framework/plugins/removepodsviolatingtopologyspreadconstraint/types.go

@@ -0,0 +1,34 @@
+/*
+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 removepodsviolatingtopologyspreadconstraint
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"sigs.k8s.io/descheduler/pkg/api"
+)
+
+// +k8s:deepcopy-gen=true
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+
+// RemovePodsViolatingTopologySpreadConstraintArgs holds arguments used to configure RemovePodsViolatingTopologySpreadConstraint plugin.
+type RemovePodsViolatingTopologySpreadConstraintArgs struct {
+	metav1.TypeMeta
+
+	Namespaces             *api.Namespaces
+	LabelSelector          *metav1.LabelSelector
+	IncludeSoftConstraints bool
+}

pkg/framework/plugins/removepodsviolatingtopologyspreadconstraint/validation.go

@@ -0,0 +1,38 @@
+/*
+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 removepodsviolatingtopologyspreadconstraint
+
+import (
+	"fmt"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// ValidateRemovePodsViolatingTopologySpreadConstraintArgs validates RemovePodsViolatingTopologySpreadConstraint arguments
+func ValidateRemovePodsViolatingTopologySpreadConstraintArgs(args *RemovePodsViolatingTopologySpreadConstraintArgs) error {
+	// At most one of include/exclude can be set
+	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")
+	}
+
+	if args.LabelSelector != nil {
+		if _, err := metav1.LabelSelectorAsSelector(args.LabelSelector); err != nil {
+			return fmt.Errorf("failed to get label selectors from strategy's params: %+v", err)
+		}
+	}
+
+	return nil
+}

pkg/framework/plugins/removepodsviolatingtopologyspreadconstraint/zz_generated.deepcopy.go

@@ -0,0 +1,63 @@
+//go:build !ignore_autogenerated
+// +build !ignore_autogenerated
+
+/*
+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.
+*/
+
+// Code generated by deepcopy-gen. DO NOT EDIT.
+
+package removepodsviolatingtopologyspreadconstraint
+
+import (
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	runtime "k8s.io/apimachinery/pkg/runtime"
+	api "sigs.k8s.io/descheduler/pkg/api"
+)
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *RemovePodsViolatingTopologySpreadConstraintArgs) DeepCopyInto(out *RemovePodsViolatingTopologySpreadConstraintArgs) {
+	*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 RemovePodsViolatingTopologySpreadConstraintArgs.
+func (in *RemovePodsViolatingTopologySpreadConstraintArgs) DeepCopy() *RemovePodsViolatingTopologySpreadConstraintArgs {
+	if in == nil {
+		return nil
+	}
+	out := new(RemovePodsViolatingTopologySpreadConstraintArgs)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *RemovePodsViolatingTopologySpreadConstraintArgs) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}

pkg/framework/plugins/removepodsviolatingtopologyspreadconstraint/zz_generated.defaults.go

@@ -0,0 +1,40 @@
+//go:build !ignore_autogenerated
+// +build !ignore_autogenerated
+
+/*
+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.
+*/
+
+// Code generated by defaulter-gen. DO NOT EDIT.
+
+package removepodsviolatingtopologyspreadconstraint
+
+import (
+	runtime "k8s.io/apimachinery/pkg/runtime"
+)
+
+// RegisterDefaults adds defaulters functions to the given scheme.
+// Public to allow building arbitrary schemes.
+// All generated defaulters are covering - they call all nested defaulters.
+func RegisterDefaults(scheme *runtime.Scheme) error {
+	scheme.AddTypeDefaultingFunc(&RemovePodsViolatingTopologySpreadConstraintArgs{}, func(obj interface{}) {
+		SetObjectDefaults_RemovePodsViolatingTopologySpreadConstraintArgs(obj.(*RemovePodsViolatingTopologySpreadConstraintArgs))
+	})
+	return nil
+}
+
+func SetObjectDefaults_RemovePodsViolatingTopologySpreadConstraintArgs(in *RemovePodsViolatingTopologySpreadConstraintArgs) {
+	SetDefaults_RemovePodsViolatingTopologySpreadConstraintArgs(in)
+}