Merge pull request #123481 from sanposhiho/mindomain-stable

graduate MinDomainsInPodTopologySpread to stable

api/openapi-spec/swagger.json

@@ -10925,7 +10925,7 @@
           "type": "integer"
         },
         "minDomains": {
-          "description": "MinDomains indicates a minimum number of eligible domains. When the number of eligible domains with matching topology keys is less than minDomains, Pod Topology Spread treats \"global minimum\" as 0, and then the calculation of Skew is performed. And when the number of eligible domains with matching topology keys equals or greater than minDomains, this value has no effect on scheduling. As a result, when the number of eligible domains is less than minDomains, scheduler won't schedule more than maxSkew Pods to those domains. If value is nil, the constraint behaves as if MinDomains is equal to 1. Valid values are integers greater than 0. When value is not nil, WhenUnsatisfiable must be DoNotSchedule.\n\nFor example, in a 3-zone cluster, MaxSkew is set to 2, MinDomains is set to 5 and pods with the same labelSelector spread as 2/2/2: | zone1 | zone2 | zone3 | |  P P  |  P P  |  P P  | The number of domains is less than 5(MinDomains), so \"global minimum\" is treated as 0. In this situation, new pod with the same labelSelector cannot be scheduled, because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones, it will violate MaxSkew.\n\nThis is a beta field and requires the MinDomainsInPodTopologySpread feature gate to be enabled (enabled by default).",
+          "description": "MinDomains indicates a minimum number of eligible domains. When the number of eligible domains with matching topology keys is less than minDomains, Pod Topology Spread treats \"global minimum\" as 0, and then the calculation of Skew is performed. And when the number of eligible domains with matching topology keys equals or greater than minDomains, this value has no effect on scheduling. As a result, when the number of eligible domains is less than minDomains, scheduler won't schedule more than maxSkew Pods to those domains. If value is nil, the constraint behaves as if MinDomains is equal to 1. Valid values are integers greater than 0. When value is not nil, WhenUnsatisfiable must be DoNotSchedule.\n\nFor example, in a 3-zone cluster, MaxSkew is set to 2, MinDomains is set to 5 and pods with the same labelSelector spread as 2/2/2: | zone1 | zone2 | zone3 | |  P P  |  P P  |  P P  | The number of domains is less than 5(MinDomains), so \"global minimum\" is treated as 0. In this situation, new pod with the same labelSelector cannot be scheduled, because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones, it will violate MaxSkew.",
           "format": "int32",
           "type": "integer"
         },

api/openapi-spec/v3/api__v1_openapi.json

@@ -7703,7 +7703,7 @@
             "type": "integer"
           },
           "minDomains": {
-            "description": "MinDomains indicates a minimum number of eligible domains. When the number of eligible domains with matching topology keys is less than minDomains, Pod Topology Spread treats \"global minimum\" as 0, and then the calculation of Skew is performed. And when the number of eligible domains with matching topology keys equals or greater than minDomains, this value has no effect on scheduling. As a result, when the number of eligible domains is less than minDomains, scheduler won't schedule more than maxSkew Pods to those domains. If value is nil, the constraint behaves as if MinDomains is equal to 1. Valid values are integers greater than 0. When value is not nil, WhenUnsatisfiable must be DoNotSchedule.\n\nFor example, in a 3-zone cluster, MaxSkew is set to 2, MinDomains is set to 5 and pods with the same labelSelector spread as 2/2/2: | zone1 | zone2 | zone3 | |  P P  |  P P  |  P P  | The number of domains is less than 5(MinDomains), so \"global minimum\" is treated as 0. In this situation, new pod with the same labelSelector cannot be scheduled, because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones, it will violate MaxSkew.\n\nThis is a beta field and requires the MinDomainsInPodTopologySpread feature gate to be enabled (enabled by default).",
+            "description": "MinDomains indicates a minimum number of eligible domains. When the number of eligible domains with matching topology keys is less than minDomains, Pod Topology Spread treats \"global minimum\" as 0, and then the calculation of Skew is performed. And when the number of eligible domains with matching topology keys equals or greater than minDomains, this value has no effect on scheduling. As a result, when the number of eligible domains is less than minDomains, scheduler won't schedule more than maxSkew Pods to those domains. If value is nil, the constraint behaves as if MinDomains is equal to 1. Valid values are integers greater than 0. When value is not nil, WhenUnsatisfiable must be DoNotSchedule.\n\nFor example, in a 3-zone cluster, MaxSkew is set to 2, MinDomains is set to 5 and pods with the same labelSelector spread as 2/2/2: | zone1 | zone2 | zone3 | |  P P  |  P P  |  P P  | The number of domains is less than 5(MinDomains), so \"global minimum\" is treated as 0. In this situation, new pod with the same labelSelector cannot be scheduled, because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones, it will violate MaxSkew.",
             "format": "int32",
             "type": "integer"
           },

api/openapi-spec/v3/apis__apps__v1_openapi.json

@@ -4748,7 +4748,7 @@
             "type": "integer"
           },
           "minDomains": {
-            "description": "MinDomains indicates a minimum number of eligible domains. When the number of eligible domains with matching topology keys is less than minDomains, Pod Topology Spread treats \"global minimum\" as 0, and then the calculation of Skew is performed. And when the number of eligible domains with matching topology keys equals or greater than minDomains, this value has no effect on scheduling. As a result, when the number of eligible domains is less than minDomains, scheduler won't schedule more than maxSkew Pods to those domains. If value is nil, the constraint behaves as if MinDomains is equal to 1. Valid values are integers greater than 0. When value is not nil, WhenUnsatisfiable must be DoNotSchedule.\n\nFor example, in a 3-zone cluster, MaxSkew is set to 2, MinDomains is set to 5 and pods with the same labelSelector spread as 2/2/2: | zone1 | zone2 | zone3 | |  P P  |  P P  |  P P  | The number of domains is less than 5(MinDomains), so \"global minimum\" is treated as 0. In this situation, new pod with the same labelSelector cannot be scheduled, because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones, it will violate MaxSkew.\n\nThis is a beta field and requires the MinDomainsInPodTopologySpread feature gate to be enabled (enabled by default).",
+            "description": "MinDomains indicates a minimum number of eligible domains. When the number of eligible domains with matching topology keys is less than minDomains, Pod Topology Spread treats \"global minimum\" as 0, and then the calculation of Skew is performed. And when the number of eligible domains with matching topology keys equals or greater than minDomains, this value has no effect on scheduling. As a result, when the number of eligible domains is less than minDomains, scheduler won't schedule more than maxSkew Pods to those domains. If value is nil, the constraint behaves as if MinDomains is equal to 1. Valid values are integers greater than 0. When value is not nil, WhenUnsatisfiable must be DoNotSchedule.\n\nFor example, in a 3-zone cluster, MaxSkew is set to 2, MinDomains is set to 5 and pods with the same labelSelector spread as 2/2/2: | zone1 | zone2 | zone3 | |  P P  |  P P  |  P P  | The number of domains is less than 5(MinDomains), so \"global minimum\" is treated as 0. In this situation, new pod with the same labelSelector cannot be scheduled, because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones, it will violate MaxSkew.",
             "format": "int32",
             "type": "integer"
           },

api/openapi-spec/v3/apis__batch__v1_openapi.json

@@ -3903,7 +3903,7 @@
             "type": "integer"
           },
           "minDomains": {
-            "description": "MinDomains indicates a minimum number of eligible domains. When the number of eligible domains with matching topology keys is less than minDomains, Pod Topology Spread treats \"global minimum\" as 0, and then the calculation of Skew is performed. And when the number of eligible domains with matching topology keys equals or greater than minDomains, this value has no effect on scheduling. As a result, when the number of eligible domains is less than minDomains, scheduler won't schedule more than maxSkew Pods to those domains. If value is nil, the constraint behaves as if MinDomains is equal to 1. Valid values are integers greater than 0. When value is not nil, WhenUnsatisfiable must be DoNotSchedule.\n\nFor example, in a 3-zone cluster, MaxSkew is set to 2, MinDomains is set to 5 and pods with the same labelSelector spread as 2/2/2: | zone1 | zone2 | zone3 | |  P P  |  P P  |  P P  | The number of domains is less than 5(MinDomains), so \"global minimum\" is treated as 0. In this situation, new pod with the same labelSelector cannot be scheduled, because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones, it will violate MaxSkew.\n\nThis is a beta field and requires the MinDomainsInPodTopologySpread feature gate to be enabled (enabled by default).",
+            "description": "MinDomains indicates a minimum number of eligible domains. When the number of eligible domains with matching topology keys is less than minDomains, Pod Topology Spread treats \"global minimum\" as 0, and then the calculation of Skew is performed. And when the number of eligible domains with matching topology keys equals or greater than minDomains, this value has no effect on scheduling. As a result, when the number of eligible domains is less than minDomains, scheduler won't schedule more than maxSkew Pods to those domains. If value is nil, the constraint behaves as if MinDomains is equal to 1. Valid values are integers greater than 0. When value is not nil, WhenUnsatisfiable must be DoNotSchedule.\n\nFor example, in a 3-zone cluster, MaxSkew is set to 2, MinDomains is set to 5 and pods with the same labelSelector spread as 2/2/2: | zone1 | zone2 | zone3 | |  P P  |  P P  |  P P  | The number of domains is less than 5(MinDomains), so \"global minimum\" is treated as 0. In this situation, new pod with the same labelSelector cannot be scheduled, because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones, it will violate MaxSkew.",
             "format": "int32",
             "type": "integer"
           },

pkg/api/pod/util.go

@@ -559,7 +559,6 @@ func dropDisabledFields(
 
 	dropDisabledProcMountField(podSpec, oldPodSpec)
 
-	dropDisabledTopologySpreadConstraintsFields(podSpec, oldPodSpec)
 	dropDisabledNodeInclusionPolicyFields(podSpec, oldPodSpec)
 	dropDisabledMatchLabelKeysFieldInTopologySpread(podSpec, oldPodSpec)
 	dropDisabledMatchLabelKeysFieldInPodAffinity(podSpec, oldPodSpec)
@@ -737,33 +736,6 @@ func dropEphemeralResourceClaimRequests(containers []api.EphemeralContainer) {
 	}
 }
 
-// dropDisabledTopologySpreadConstraintsFields removes disabled fields from PodSpec related
-// to TopologySpreadConstraints only if it is not already used by the old spec.
-func dropDisabledTopologySpreadConstraintsFields(podSpec, oldPodSpec *api.PodSpec) {
-	if !utilfeature.DefaultFeatureGate.Enabled(features.MinDomainsInPodTopologySpread) &&
-		!minDomainsInUse(oldPodSpec) &&
-		podSpec != nil {
-		for i := range podSpec.TopologySpreadConstraints {
-			podSpec.TopologySpreadConstraints[i].MinDomains = nil
-		}
-	}
-}
-
-// minDomainsInUse returns true if the pod spec is non-nil
-// and has non-nil MinDomains field in TopologySpreadConstraints.
-func minDomainsInUse(podSpec *api.PodSpec) bool {
-	if podSpec == nil {
-		return false
-	}
-
-	for _, c := range podSpec.TopologySpreadConstraints {
-		if c.MinDomains != nil {
-			return true
-		}
-	}
-	return false
-}
-
 // dropDisabledProcMountField removes disabled fields from PodSpec related
 // to ProcMount only if it is not already used by the old spec
 func dropDisabledProcMountField(podSpec, oldPodSpec *api.PodSpec) {

pkg/api/pod/util_test.go

@@ -998,173 +998,6 @@ func TestValidatePodDeletionCostOption(t *testing.T) {
 	}
 }
 
-func TestDropDisabledTopologySpreadConstraintsFields(t *testing.T) {
-	testCases := []struct {
-		name        string
-		enabled     bool
-		podSpec     *api.PodSpec
-		oldPodSpec  *api.PodSpec
-		wantPodSpec *api.PodSpec
-	}{
-		{
-			name:        "TopologySpreadConstraints is nil",
-			podSpec:     &api.PodSpec{},
-			oldPodSpec:  &api.PodSpec{},
-			wantPodSpec: &api.PodSpec{},
-		},
-		{
-			name:        "TopologySpreadConstraints is empty",
-			podSpec:     &api.PodSpec{TopologySpreadConstraints: []api.TopologySpreadConstraint{}},
-			oldPodSpec:  &api.PodSpec{TopologySpreadConstraints: []api.TopologySpreadConstraint{}},
-			wantPodSpec: &api.PodSpec{TopologySpreadConstraints: []api.TopologySpreadConstraint{}},
-		},
-		{
-			name: "TopologySpreadConstraints is not empty, but all constraints don't have minDomains",
-			podSpec: &api.PodSpec{TopologySpreadConstraints: []api.TopologySpreadConstraint{
-				{
-					MinDomains: nil,
-				},
-				{
-					MinDomains: nil,
-				},
-			}},
-			oldPodSpec: &api.PodSpec{TopologySpreadConstraints: []api.TopologySpreadConstraint{
-				{
-					MinDomains: nil,
-				},
-				{
-					MinDomains: nil,
-				},
-			}},
-			wantPodSpec: &api.PodSpec{TopologySpreadConstraints: []api.TopologySpreadConstraint{
-				{
-					MinDomains: nil,
-				},
-				{
-					MinDomains: nil,
-				},
-			}},
-		},
-		{
-			name: "one constraint in podSpec has non-empty minDomains, feature gate is disabled " +
-				"and all constraint in oldPodSpec doesn't have minDomains",
-			enabled: false,
-			podSpec: &api.PodSpec{
-				TopologySpreadConstraints: []api.TopologySpreadConstraint{
-					{
-						MinDomains: pointer.Int32(2),
-					},
-					{
-						MinDomains: nil,
-					},
-				},
-			},
-			oldPodSpec: &api.PodSpec{
-				TopologySpreadConstraints: []api.TopologySpreadConstraint{
-					{
-						MinDomains: nil,
-					},
-					{
-						MinDomains: nil,
-					},
-				},
-			},
-			wantPodSpec: &api.PodSpec{
-				TopologySpreadConstraints: []api.TopologySpreadConstraint{
-					{
-						// cleared.
-						MinDomains: nil,
-					},
-					{
-						MinDomains: nil,
-					},
-				},
-			},
-		},
-		{
-			name: "one constraint in podSpec has non-empty minDomains, feature gate is disabled " +
-				"and one constraint in oldPodSpec has minDomains",
-			enabled: false,
-			podSpec: &api.PodSpec{
-				TopologySpreadConstraints: []api.TopologySpreadConstraint{
-					{
-						MinDomains: pointer.Int32(2),
-					},
-					{
-						MinDomains: nil,
-					},
-				},
-			},
-			oldPodSpec: &api.PodSpec{
-				TopologySpreadConstraints: []api.TopologySpreadConstraint{
-					{
-						MinDomains: pointer.Int32(2),
-					},
-					{
-						MinDomains: nil,
-					},
-				},
-			},
-			wantPodSpec: &api.PodSpec{
-				TopologySpreadConstraints: []api.TopologySpreadConstraint{
-					{
-						// not cleared.
-						MinDomains: pointer.Int32(2),
-					},
-					{
-						MinDomains: nil,
-					},
-				},
-			},
-		},
-		{
-			name: "one constraint in podSpec has non-empty minDomains, feature gate is enabled" +
-				"and all constraint in oldPodSpec doesn't have minDomains",
-			enabled: true,
-			podSpec: &api.PodSpec{
-				TopologySpreadConstraints: []api.TopologySpreadConstraint{
-					{
-						MinDomains: pointer.Int32(2),
-					},
-					{
-						MinDomains: nil,
-					},
-				},
-			},
-			oldPodSpec: &api.PodSpec{
-				TopologySpreadConstraints: []api.TopologySpreadConstraint{
-					{
-						MinDomains: nil,
-					},
-					{
-						MinDomains: nil,
-					},
-				},
-			},
-			wantPodSpec: &api.PodSpec{
-				TopologySpreadConstraints: []api.TopologySpreadConstraint{
-					{
-						// not cleared.
-						MinDomains: pointer.Int32(2),
-					},
-					{
-						MinDomains: nil,
-					},
-				},
-			},
-		},
-	}
-	for _, tc := range testCases {
-		t.Run(tc.name, func(t *testing.T) {
-			defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.MinDomainsInPodTopologySpread, tc.enabled)()
-			dropDisabledFields(tc.podSpec, nil, tc.oldPodSpec, nil)
-			if diff := cmp.Diff(tc.wantPodSpec, tc.podSpec); diff != "" {
-				t.Errorf("unexpected pod spec (-want, +got):\n%s", diff)
-			}
-		})
-	}
-}
-
 func TestDropDisabledPodStatusFields(t *testing.T) {
 	podWithHostIPs := func() *api.PodStatus {
 		return &api.PodStatus{

pkg/apis/core/types.go

@@ -6208,8 +6208,6 @@ type TopologySpreadConstraint struct {
 	// In this situation, new pod with the same labelSelector cannot be scheduled,
 	// because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones,
 	// it will violate MaxSkew.
-	//
-	// This is a beta field and requires the MinDomainsInPodTopologySpread feature gate to be enabled (enabled by default).
 	// +optional
 	MinDomains *int32
 	// NodeAffinityPolicy indicates how we will treat Pod's nodeAffinity/nodeSelector

pkg/features/kube_features.go

@@ -488,6 +488,7 @@ const (
 	// kep: https://kep.k8s.io/3022
 	// alpha: v1.24
 	// beta: v1.25
+	// GA: v1.30
 	//
 	// Enable MinDomains in Pod Topology Spread.
 	MinDomainsInPodTopologySpread featuregate.Feature = "MinDomainsInPodTopologySpread"
@@ -1076,7 +1077,7 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 
 	MemoryQoS: {Default: false, PreRelease: featuregate.Alpha},
 
-	MinDomainsInPodTopologySpread: {Default: true, PreRelease: featuregate.Beta},
+	MinDomainsInPodTopologySpread: {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.32
 
 	MultiCIDRServiceAllocator: {Default: false, PreRelease: featuregate.Alpha},
 

pkg/generated/openapi/zz_generated.openapi.go

@@ -29983,7 +29983,7 @@ func schema_k8sio_api_core_v1_TopologySpreadConstraint(ref common.ReferenceCallb
 					},
 					"minDomains": {
 						SchemaProps: spec.SchemaProps{
-							Description: "MinDomains indicates a minimum number of eligible domains. When the number of eligible domains with matching topology keys is less than minDomains, Pod Topology Spread treats \"global minimum\" as 0, and then the calculation of Skew is performed. And when the number of eligible domains with matching topology keys equals or greater than minDomains, this value has no effect on scheduling. As a result, when the number of eligible domains is less than minDomains, scheduler won't schedule more than maxSkew Pods to those domains. If value is nil, the constraint behaves as if MinDomains is equal to 1. Valid values are integers greater than 0. When value is not nil, WhenUnsatisfiable must be DoNotSchedule.\n\nFor example, in a 3-zone cluster, MaxSkew is set to 2, MinDomains is set to 5 and pods with the same labelSelector spread as 2/2/2: | zone1 | zone2 | zone3 | |  P P  |  P P  |  P P  | The number of domains is less than 5(MinDomains), so \"global minimum\" is treated as 0. In this situation, new pod with the same labelSelector cannot be scheduled, because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones, it will violate MaxSkew.\n\nThis is a beta field and requires the MinDomainsInPodTopologySpread feature gate to be enabled (enabled by default).",
+							Description: "MinDomains indicates a minimum number of eligible domains. When the number of eligible domains with matching topology keys is less than minDomains, Pod Topology Spread treats \"global minimum\" as 0, and then the calculation of Skew is performed. And when the number of eligible domains with matching topology keys equals or greater than minDomains, this value has no effect on scheduling. As a result, when the number of eligible domains is less than minDomains, scheduler won't schedule more than maxSkew Pods to those domains. If value is nil, the constraint behaves as if MinDomains is equal to 1. Valid values are integers greater than 0. When value is not nil, WhenUnsatisfiable must be DoNotSchedule.\n\nFor example, in a 3-zone cluster, MaxSkew is set to 2, MinDomains is set to 5 and pods with the same labelSelector spread as 2/2/2: | zone1 | zone2 | zone3 | |  P P  |  P P  |  P P  | The number of domains is less than 5(MinDomains), so \"global minimum\" is treated as 0. In this situation, new pod with the same labelSelector cannot be scheduled, because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones, it will violate MaxSkew.",
 							Type:        []string{"integer"},
 							Format:      "int32",
 						},

pkg/scheduler/framework/plugins/feature/feature.go

@@ -22,7 +22,6 @@ package feature
 type Features struct {
 	EnableDynamicResourceAllocation              bool
 	EnableVolumeCapacityPriority                 bool
-	EnableMinDomainsInPodTopologySpread          bool
 	EnableNodeInclusionPolicyInPodTopologySpread bool
 	EnableMatchLabelKeysInPodTopologySpread      bool
 	EnablePodDisruptionConditions                bool

pkg/scheduler/framework/plugins/podtopologyspread/common.go

@@ -24,6 +24,7 @@ import (
 	"k8s.io/component-helpers/scheduling/corev1/nodeaffinity"
 	"k8s.io/kubernetes/pkg/scheduler/framework"
 	"k8s.io/kubernetes/pkg/scheduler/framework/plugins/helper"
+	"k8s.io/utils/ptr"
 )
 
 type topologyPair struct {
@@ -112,13 +113,10 @@ func (pl *PodTopologySpread) filterTopologySpreadConstraints(constraints []v1.To
 				MaxSkew:            c.MaxSkew,
 				TopologyKey:        c.TopologyKey,
 				Selector:           selector,
-				MinDomains:         1,                            // If MinDomains is nil, we treat MinDomains as 1.
+				MinDomains:         ptr.Deref(c.MinDomains, 1),   // If MinDomains is nil, we treat MinDomains as 1.
 				NodeAffinityPolicy: v1.NodeInclusionPolicyHonor,  // If NodeAffinityPolicy is nil, we treat NodeAffinityPolicy as "Honor".
 				NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore, // If NodeTaintsPolicy is nil, we treat NodeTaintsPolicy as "Ignore".
 			}
-			if pl.enableMinDomainsInPodTopologySpread && c.MinDomains != nil {
-				tsc.MinDomains = *c.MinDomains
-			}
 			if pl.enableNodeInclusionPolicyInPodTopologySpread {
 				if c.NodeAffinityPolicy != nil {
 					tsc.NodeAffinityPolicy = *c.NodeAffinityPolicy

pkg/scheduler/framework/plugins/podtopologyspread/filtering.go

@@ -51,17 +51,13 @@ type preFilterState struct {
 }
 
 // minMatchNum returns the global minimum for the calculation of skew while taking MinDomains into account.
-func (s *preFilterState) minMatchNum(tpKey string, minDomains int32, enableMinDomainsInPodTopologySpread bool) (int, error) {
+func (s *preFilterState) minMatchNum(tpKey string, minDomains int32) (int, error) {
 	paths, ok := s.TpKeyToCriticalPaths[tpKey]
 	if !ok {
 		return 0, fmt.Errorf("failed to retrieve path by topology key")
 	}
 
 	minMatchNum := paths[0].MatchNum
-	if !enableMinDomainsInPodTopologySpread {
-		return minMatchNum, nil
-	}
-
 	domainsNum, ok := s.TpKeyToDomainsNum[tpKey]
 	if !ok {
 		return 0, fmt.Errorf("failed to retrieve the number of domains by topology key")
@@ -296,11 +292,9 @@ func (pl *PodTopologySpread) calPreFilterState(ctx context.Context, pod *v1.Pod)
 			s.TpPairToMatchNum[tp] += count
 		}
 	}
-	if pl.enableMinDomainsInPodTopologySpread {
-		s.TpKeyToDomainsNum = make(map[string]int, len(constraints))
-		for tp := range s.TpPairToMatchNum {
-			s.TpKeyToDomainsNum[tp.key]++
-		}
+	s.TpKeyToDomainsNum = make(map[string]int, len(constraints))
+	for tp := range s.TpPairToMatchNum {
+		s.TpKeyToDomainsNum[tp.key]++
 	}
 
 	// calculate min match for each topology pair
@@ -341,7 +335,7 @@ func (pl *PodTopologySpread) Filter(ctx context.Context, cycleState *framework.C
 
 		// judging criteria:
 		// 'existing matching num' + 'if self-match (1 or 0)' - 'global minimum' <= 'maxSkew'
-		minMatchNum, err := s.minMatchNum(tpKey, c.MinDomains, pl.enableMinDomainsInPodTopologySpread)
+		minMatchNum, err := s.minMatchNum(tpKey, c.MinDomains)
 		if err != nil {
 			logger.Error(err, "Internal error occurred while retrieving value precalculated in PreFilter", "topologyKey", tpKey, "paths", s.TpKeyToCriticalPaths)
 			continue

pkg/scheduler/framework/plugins/podtopologyspread/filtering_test.go

@@ -68,7 +68,6 @@ func (p *criticalPaths) sort() {
 }
 
 func TestPreFilterState(t *testing.T) {
-
 	tests := []struct {
 		name                      string
 		pod                       *v1.Pod
@@ -78,7 +77,6 @@ func TestPreFilterState(t *testing.T) {
 		defaultConstraints        []v1.TopologySpreadConstraint
 		want                      *preFilterState
 		wantPrefilterStatus       *framework.Status
-		enableMinDomains          bool
 		enableNodeInclusionPolicy bool
 		enableMatchLabelKeys      bool
 	}{
@@ -104,6 +102,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 0}, {"zone2", 0}},
 				},
@@ -142,6 +141,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 2}, {"zone1", 3}},
 				},
@@ -180,6 +180,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 0}, {"zone1", 0}},
 				},
@@ -220,6 +221,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone3", 0}, {"zone2", 2}},
 				},
@@ -259,6 +261,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 1}, {"zone1", 2}},
 				},
@@ -308,6 +311,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 4},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 3}, {"zone2", 4}},
 					"node": {{"node-x", 0}, {"node-b", 1}},
@@ -363,6 +367,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 3}, {"zone2", 4}},
 					"node": {{"node-b", 1}, {"node-a", 2}},
@@ -410,6 +415,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 0}, {"zone1", 1}},
 					"node": {{"node-a", 0}, {"node-y", 0}},
@@ -462,6 +468,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 3}, {"zone2", 4}},
 					"node": {{"node-b", 0}, {"node-a", 1}},
@@ -516,6 +523,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 3}, {"zone2", 4}},
 					"node": {{"node-b", 1}, {"node-a", 2}},
@@ -559,6 +567,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": newCriticalPaths(),
 					"rack": newCriticalPaths(),
@@ -600,6 +609,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": newCriticalPaths(),
 				},
@@ -638,7 +648,6 @@ func TestPreFilterState(t *testing.T) {
 				st.MakePod().Name("p-y3").Node("node-y").Label("foo", "").Obj(),
 				st.MakePod().Name("p-y4").Node("node-y").Label("foo", "").Obj(),
 			},
-			enableMinDomains: true,
 			want: &preFilterState{
 				Constraints: []topologySpreadConstraint{
 					{
@@ -704,6 +713,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"node": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": {{"node-a", 1}, {"node-b", 2}},
 				},
@@ -742,6 +752,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"node": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": {{"node-a", 1}, {"node-b", 2}},
 				},
@@ -780,6 +791,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": {{"node-c", 0}, {"node-a", 1}},
 				},
@@ -819,6 +831,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"node": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": {{"node-a", 1}, {"node-b", 2}},
 				},
@@ -857,6 +870,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": {{"node-c", 0}, {"node-a", 1}},
 				},
@@ -895,6 +909,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": {{"node-c", 0}, {"node-a", 1}},
 				},
@@ -933,6 +948,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": {{"node-c", 0}, {"node-a", 1}},
 				},
@@ -971,6 +987,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyHonor,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"node": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": {{"node-a", 1}, {"node-b", 2}},
 				},
@@ -1009,6 +1026,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyHonor,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": {{"node-c", 0}, {"node-a", 1}},
 				},
@@ -1056,6 +1074,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 0}, {"zone2", 1}},
 					"node": {{"node-a", 0}, {"node-x", 1}},
@@ -1105,6 +1124,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 0}, {"zone2", 1}},
 					"node": {{"node-a", 0}, {"node-x", 1}},
@@ -1157,6 +1177,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 0}, {"zone2", 1}},
 					"node": {{"node-b", 0}, {"node-x", 1}},
@@ -1209,6 +1230,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyHonor,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 2}, {"zone2", 3}},
 					"node": {{"node-y", 1}, {"node-x", 2}},
@@ -1251,6 +1273,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 2}, {"zone1", 3}},
 				},
@@ -1290,6 +1313,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 1}, {"zone1", 1}},
 				},
@@ -1329,6 +1353,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 2}, {"zone1", 3}},
 				},
@@ -1368,6 +1393,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 0}, {"zone1", 0}},
 				},
@@ -1407,6 +1433,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 0}, {"zone1", 0}},
 				},
@@ -1445,6 +1472,7 @@ func TestPreFilterState(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 2}, {"zone1", 3}},
 				},
@@ -1475,7 +1503,6 @@ func TestPreFilterState(t *testing.T) {
 			}
 
 			p := plugintesting.SetupPluginWithInformers(ctx, t, topologySpreadFunc, args, cache.NewSnapshot(tt.existingPods, tt.nodes), tt.objs)
-			p.(*PodTopologySpread).enableMinDomainsInPodTopologySpread = tt.enableMinDomains
 			p.(*PodTopologySpread).enableNodeInclusionPolicyInPodTopologySpread = tt.enableNodeInclusionPolicy
 			p.(*PodTopologySpread).enableMatchLabelKeysInPodTopologySpread = tt.enableMatchLabelKeys
 
@@ -1534,7 +1561,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone1").Label("node", "node-b").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{nodeConstraint},
+				Constraints:       []topologySpreadConstraint{nodeConstraint},
+				TpKeyToDomainsNum: map[string]int{"node": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": {{"node-b", 0}, {"node-a", 1}},
 				},
@@ -1559,7 +1587,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone1").Label("node", "node-b").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{nodeConstraint},
+				Constraints:       []topologySpreadConstraint{nodeConstraint},
+				TpKeyToDomainsNum: map[string]int{"node": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": {{"node-a", 1}, {"node-b", 1}},
 				},
@@ -1584,7 +1613,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone1").Label("node", "node-b").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{nodeConstraint},
+				Constraints:       []topologySpreadConstraint{nodeConstraint},
+				TpKeyToDomainsNum: map[string]int{"node": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": {{"node-a", 0}, {"node-b", 1}},
 				},
@@ -1609,7 +1639,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone1").Label("node", "node-b").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{nodeConstraint},
+				Constraints:       []topologySpreadConstraint{nodeConstraint},
+				TpKeyToDomainsNum: map[string]int{"node": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"node": {{"node-a", 0}, {"node-b", 2}},
 				},
@@ -1633,7 +1664,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-x").Label("zone", "zone2").Label("node", "node-x").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint, nodeConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint, nodeConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 0}, {"zone1", 1}},
 					"node": {{"node-x", 0}, {"node-a", 1}},
@@ -1662,7 +1694,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-x").Label("zone", "zone2").Label("node", "node-x").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint, nodeConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint, nodeConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 1}, {"zone2", 1}},
 					"node": {{"node-a", 1}, {"node-x", 1}},
@@ -1694,7 +1727,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-x").Label("zone", "zone2").Label("node", "node-x").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint, nodeConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint, nodeConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 1}, {"zone1", 3}},
 					"node": {{"node-a", 1}, {"node-x", 1}},
@@ -1738,6 +1772,7 @@ func TestPreFilterStateAddPod(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 1}, {"zone1", 2}},
 					"node": {{"node-a", 0}, {"node-b", 1}},
@@ -1781,6 +1816,7 @@ func TestPreFilterStateAddPod(t *testing.T) {
 						NodeTaintsPolicy:   v1.NodeInclusionPolicyIgnore,
 					},
 				},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 1}, {"zone2", 1}},
 					"node": {{"node-a", 1}, {"node-b", 1}},
@@ -1810,7 +1846,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone2").Label("node", "node-b").Label("foo", "").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 1},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 1}, {MatchNum: math.MaxInt32}},
 				},
@@ -1836,7 +1873,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone2").Label("node", "node-b").Label("foo", "").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 1},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 1}, {MatchNum: math.MaxInt32}},
 				},
@@ -1862,7 +1900,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone2").Label("node", "node-b").Label("foo", "").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 1}, {"zone2", 2}},
 				},
@@ -1889,7 +1928,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone2").Label("node", "node-b").Label("foo", "").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 1}, {"zone2", 2}},
 				},
@@ -1916,7 +1956,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone2").Label("node", "node-b").Label("foo", "").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 1}, {"zone2", 1}},
 				},
@@ -1943,7 +1984,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone2").Label("node", "node-b").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 1}, {"zone2", 2}},
 				},
@@ -1970,7 +2012,8 @@ func TestPreFilterStateAddPod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone2").Label("node", "node-b").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 1}, {"zone2", 2}},
 				},
@@ -2054,7 +2097,8 @@ func TestPreFilterStateRemovePod(t *testing.T) {
 			deletedPodIdx: 0, // remove pod "p-a1"
 			nodeIdx:       0, // node-a
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 1}, {"zone2", 1}},
 				},
@@ -2084,7 +2128,8 @@ func TestPreFilterStateRemovePod(t *testing.T) {
 			deletedPodIdx: 0, // remove pod "p-a1"
 			nodeIdx:       0, // node-a
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 1}, {"zone2", 2}},
 				},
@@ -2115,7 +2160,8 @@ func TestPreFilterStateRemovePod(t *testing.T) {
 			deletedPodIdx: 0, // remove pod "p-a0"
 			nodeIdx:       0, // node-a
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 2}, {"zone2", 2}},
 				},
@@ -2146,7 +2192,8 @@ func TestPreFilterStateRemovePod(t *testing.T) {
 			deletedPod:    st.MakePod().Name("p-a0").Node("node-a").Label("bar", "").Obj(),
 			nodeIdx:       0, // node-a
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone1", 2}, {"zone2", 2}},
 				},
@@ -2177,7 +2224,8 @@ func TestPreFilterStateRemovePod(t *testing.T) {
 			deletedPodIdx: 3, // remove pod "p-x1"
 			nodeIdx:       2, // node-x
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint, nodeConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint, nodeConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2, "node": 3},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 1}, {"zone1", 3}},
 					"node": {{"node-b", 1}, {"node-x", 1}},
@@ -2207,7 +2255,8 @@ func TestPreFilterStateRemovePod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone2").Label("node", "node-b").Label("foo", "").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 1},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 1}, {MatchNum: math.MaxInt32}},
 				},
@@ -2233,7 +2282,8 @@ func TestPreFilterStateRemovePod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone2").Label("node", "node-b").Label("foo", "").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 1},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 1}, {MatchNum: math.MaxInt32}},
 				},
@@ -2259,7 +2309,8 @@ func TestPreFilterStateRemovePod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone2").Label("node", "node-b").Label("foo", "").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 0}, {"zone1", 1}},
 				},
@@ -2286,7 +2337,8 @@ func TestPreFilterStateRemovePod(t *testing.T) {
 				st.MakeNode().Name("node-b").Label("zone", "zone2").Label("node", "node-b").Label("foo", "").Obj(),
 			},
 			want: &preFilterState{
-				Constraints: []topologySpreadConstraint{zoneConstraint},
+				Constraints:       []topologySpreadConstraint{zoneConstraint},
+				TpKeyToDomainsNum: map[string]int{"zone": 2},
 				TpKeyToCriticalPaths: map[string]*criticalPaths{
 					"zone": {{"zone2", 0}, {"zone1", 1}},
 				},
@@ -2416,7 +2468,6 @@ func TestSingleConstraint(t *testing.T) {
 		nodes                     []*v1.Node
 		existingPods              []*v1.Pod
 		wantStatusCode            map[string]framework.Code
-		enableMinDomains          bool
 		enableNodeInclusionPolicy bool
 	}{
 		{
@@ -2748,7 +2799,6 @@ func TestSingleConstraint(t *testing.T) {
 				st.MakePod().Name("p-b2").Node("node-b").Label("foo", "").Obj(),
 				st.MakePod().Name("p-c1").Node("node-c").Label("foo", "").Obj(),
 			},
-			enableMinDomains: true,
 			wantStatusCode: map[string]framework.Code{
 				"node-a": framework.Unschedulable,
 				"node-b": framework.Unschedulable,
@@ -2779,7 +2829,6 @@ func TestSingleConstraint(t *testing.T) {
 				st.MakePod().Name("p-b2").Node("node-b").Label("foo", "").Obj(),
 				st.MakePod().Name("p-c1").Node("node-c").Label("foo", "").Obj(),
 			},
-			enableMinDomains: true,
 			wantStatusCode: map[string]framework.Code{
 				"node-a": framework.Success,
 				"node-b": framework.Success,
@@ -2809,7 +2858,6 @@ func TestSingleConstraint(t *testing.T) {
 				st.MakePod().Name("p-b2").Node("node-b").Label("foo", "").Obj(),
 				st.MakePod().Name("p-y1").Node("node-y").Label("foo", "").Obj(),
 			},
-			enableMinDomains: true,
 			wantStatusCode: map[string]framework.Code{
 				"node-a": framework.Unschedulable,
 				"node-b": framework.Unschedulable,
@@ -2840,7 +2888,6 @@ func TestSingleConstraint(t *testing.T) {
 				st.MakePod().Name("p-b2").Node("node-b").Label("foo", "").Obj(),
 				st.MakePod().Name("p-y1").Node("node-y").Label("foo", "").Obj(),
 			},
-			enableMinDomains: true,
 			wantStatusCode: map[string]framework.Code{
 				"node-a": framework.Success,
 				"node-b": framework.Success,
@@ -3009,7 +3056,6 @@ func TestSingleConstraint(t *testing.T) {
 			snapshot := cache.NewSnapshot(tt.existingPods, tt.nodes)
 			pl := plugintesting.SetupPlugin(ctx, t, topologySpreadFunc, &config.PodTopologySpreadArgs{DefaultingType: config.ListDefaulting}, snapshot)
 			p := pl.(*PodTopologySpread)
-			p.enableMinDomainsInPodTopologySpread = tt.enableMinDomains
 			p.enableNodeInclusionPolicyInPodTopologySpread = tt.enableNodeInclusionPolicy
 			state := framework.NewCycleState()
 			if _, s := p.PreFilter(ctx, state, tt.pod); !s.IsSuccess() {

pkg/scheduler/framework/plugins/podtopologyspread/plugin.go

@@ -67,7 +67,6 @@ type PodTopologySpread struct {
 	replicationCtrls                             corelisters.ReplicationControllerLister
 	replicaSets                                  appslisters.ReplicaSetLister
 	statefulSets                                 appslisters.StatefulSetLister
-	enableMinDomainsInPodTopologySpread          bool
 	enableNodeInclusionPolicyInPodTopologySpread bool
 	enableMatchLabelKeysInPodTopologySpread      bool
 }
@@ -99,10 +98,9 @@ func New(_ context.Context, plArgs runtime.Object, h framework.Handle, fts featu
 		return nil, err
 	}
 	pl := &PodTopologySpread{
-		parallelizer:                        h.Parallelizer(),
-		sharedLister:                        h.SnapshotSharedLister(),
-		defaultConstraints:                  args.DefaultConstraints,
-		enableMinDomainsInPodTopologySpread: fts.EnableMinDomainsInPodTopologySpread,
+		parallelizer:       h.Parallelizer(),
+		sharedLister:       h.SnapshotSharedLister(),
+		defaultConstraints: args.DefaultConstraints,
 		enableNodeInclusionPolicyInPodTopologySpread: fts.EnableNodeInclusionPolicyInPodTopologySpread,
 		enableMatchLabelKeysInPodTopologySpread:      fts.EnableMatchLabelKeysInPodTopologySpread,
 	}

pkg/scheduler/framework/plugins/registry.go

@@ -48,7 +48,6 @@ func NewInTreeRegistry() runtime.Registry {
 	fts := plfeature.Features{
 		EnableDynamicResourceAllocation:              feature.DefaultFeatureGate.Enabled(features.DynamicResourceAllocation),
 		EnableVolumeCapacityPriority:                 feature.DefaultFeatureGate.Enabled(features.VolumeCapacityPriority),
-		EnableMinDomainsInPodTopologySpread:          feature.DefaultFeatureGate.Enabled(features.MinDomainsInPodTopologySpread),
 		EnableNodeInclusionPolicyInPodTopologySpread: feature.DefaultFeatureGate.Enabled(features.NodeInclusionPolicyInPodTopologySpread),
 		EnableMatchLabelKeysInPodTopologySpread:      feature.DefaultFeatureGate.Enabled(features.MatchLabelKeysInPodTopologySpread),
 		EnablePodDisruptionConditions:                feature.DefaultFeatureGate.Enabled(features.PodDisruptionConditions),

staging/src/k8s.io/api/core/v1/generated.proto

@@ -6046,8 +6046,6 @@ message TopologySpreadConstraint {
   // In this situation, new pod with the same labelSelector cannot be scheduled,
   // because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones,
   // it will violate MaxSkew.
-  //
-  // This is a beta field and requires the MinDomainsInPodTopologySpread feature gate to be enabled (enabled by default).
   // +optional
   optional int32 minDomains = 5;
 

staging/src/k8s.io/api/core/v1/types.go

@@ -4007,8 +4007,6 @@ type TopologySpreadConstraint struct {
 	// In this situation, new pod with the same labelSelector cannot be scheduled,
 	// because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones,
 	// it will violate MaxSkew.
-	//
-	// This is a beta field and requires the MinDomainsInPodTopologySpread feature gate to be enabled (enabled by default).
 	// +optional
 	MinDomains *int32 `json:"minDomains,omitempty" protobuf:"varint,5,opt,name=minDomains"`
 	// NodeAffinityPolicy indicates how we will treat Pod's nodeAffinity/nodeSelector

test/integration/scheduler/filters/filters_test.go

@@ -1363,7 +1363,6 @@ func TestPodTopologySpreadFilter(t *testing.T) {
 		fits                      bool
 		nodes                     []*v1.Node
 		candidateNodes            []string // nodes expected to schedule onto
-		enableMinDomains          bool
 		enableNodeInclusionPolicy bool
 		enableMatchLabelKeys      bool
 	}{
@@ -1483,10 +1482,9 @@ func TestPodTopologySpreadFilter(t *testing.T) {
 				st.MakePod().ZeroTerminationGracePeriod().Name("p2b").Node("node-2").Label("foo", "").Container(pause).Obj(),
 				st.MakePod().ZeroTerminationGracePeriod().Name("p3").Node("node-3").Label("foo", "").Container(pause).Obj(),
 			},
-			fits:             true,
-			nodes:            defaultNodes,
-			candidateNodes:   []string{"node-3"},
-			enableMinDomains: true,
+			fits:           true,
+			nodes:          defaultNodes,
+			candidateNodes: []string{"node-3"},
 		},
 		{
 			name: "pods spread across nodes as 2/2/1, maxSkew is 2, and the number of domains > minDomains, then the all nodes fit",
@@ -1510,10 +1508,9 @@ func TestPodTopologySpreadFilter(t *testing.T) {
 				st.MakePod().ZeroTerminationGracePeriod().Name("p2b").Node("node-2").Label("foo", "").Container(pause).Obj(),
 				st.MakePod().ZeroTerminationGracePeriod().Name("p3").Node("node-3").Label("foo", "").Container(pause).Obj(),
 			},
-			fits:             true,
-			nodes:            defaultNodes,
-			candidateNodes:   []string{"node-1", "node-2", "node-3"},
-			enableMinDomains: true,
+			fits:           true,
+			nodes:          defaultNodes,
+			candidateNodes: []string{"node-1", "node-2", "node-3"},
 		},
 		{
 			name: "pods spread across zone as 2/1, maxSkew is 2 and the number of domains < minDomains, then the third and fourth nodes fit",
@@ -1533,10 +1530,9 @@ func TestPodTopologySpreadFilter(t *testing.T) {
 				st.MakePod().Name("p2a").Node("node-1").Label("foo", "").Container(pause).Obj(),
 				st.MakePod().Name("p3a").Node("node-2").Label("foo", "").Container(pause).Obj(),
 			},
-			fits:             true,
-			nodes:            defaultNodes,
-			candidateNodes:   []string{"node-2", "node-3"},
-			enableMinDomains: true,
+			fits:           true,
+			nodes:          defaultNodes,
+			candidateNodes: []string{"node-2", "node-3"},
 		},
 		{
 			name: "pods spread across zone as 2/1, maxSkew is 2 and the number of domains < minDomains, then the all nodes fit",
@@ -1556,10 +1552,9 @@ func TestPodTopologySpreadFilter(t *testing.T) {
 				st.MakePod().Name("p2a").Node("node-2").Label("foo", "").Container(pause).Obj(),
 				st.MakePod().Name("p3a").Node("node-3").Label("foo", "").Container(pause).Obj(),
 			},
-			fits:             true,
-			nodes:            defaultNodes,
-			candidateNodes:   []string{"node-0", "node-1", "node-2", "node-3"},
-			enableMinDomains: true,
+			fits:           true,
+			nodes:          defaultNodes,
+			candidateNodes: []string{"node-0", "node-1", "node-2", "node-3"},
 		},
 		{
 			name: "NodeAffinityPolicy honored with labelSelectors, pods spread across zone as 2/1",
@@ -1772,7 +1767,6 @@ func TestPodTopologySpreadFilter(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.MinDomainsInPodTopologySpread, tt.enableMinDomains)()
 			defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.NodeInclusionPolicyInPodTopologySpread, tt.enableNodeInclusionPolicy)()
 			defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.MatchLabelKeysInPodTopologySpread, tt.enableMatchLabelKeys)()