tighten ceiling for matching-precedence to 10000

pkg/apis/flowcontrol/types.go

@@ -43,6 +43,11 @@ const (
 	PriorityLevelConfigurationConditionConcurrencyShared = "ConcurrencyShared"
 )
 
+// Constants used by api validation.
+const (
+	FlowSchemaMaxMatchingPrecedence int32 = 10000
+)
+
 // +genclient
 // +genclient:nonNamespaced
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
@@ -88,8 +93,8 @@ type FlowSchemaSpec struct {
 	PriorityLevelConfiguration PriorityLevelConfigurationReference
 	// `matchingPrecedence` is used to choose among the FlowSchemas that match a given request. The chosen
 	// FlowSchema is among those with the numerically lowest (which we take to be logically highest)
-	// MatchingPrecedence.  Each MatchingPrecedence value must be non-negative.
-	// Note that if the precedence is not specified or zero, it will be set to 1000 as default.
+	// MatchingPrecedence.  Each MatchingPrecedence value must be ranged in [1,10000].
+	// Note that if the precedence is not specified, it will be set to 1000 as default.
 	// +optional
 	MatchingPrecedence int32
 	// `distinguisherMethod` defines how to compute the flow distinguisher for requests that match this schema.

pkg/apis/flowcontrol/validation/validation.go

@@ -87,7 +87,10 @@ func ValidateFlowSchemaUpdate(old, fs *flowcontrol.FlowSchema) field.ErrorList {
 func ValidateFlowSchemaSpec(spec *flowcontrol.FlowSchemaSpec, fldPath *field.Path) field.ErrorList {
 	var allErrs field.ErrorList
 	if spec.MatchingPrecedence <= 0 {
-		allErrs = append(allErrs, field.Invalid(fldPath.Child("matchingPrecedence"), spec.MatchingPrecedence, "must be positive value"))
+		allErrs = append(allErrs, field.Invalid(fldPath.Child("matchingPrecedence"), spec.MatchingPrecedence, "must be a positive value"))
+	}
+	if spec.MatchingPrecedence > flowcontrol.FlowSchemaMaxMatchingPrecedence {
+		allErrs = append(allErrs, field.Invalid(fldPath.Child("matchingPrecedence"), spec.MatchingPrecedence, fmt.Sprintf("must not be greater than %v", flowcontrol.FlowSchemaMaxMatchingPrecedence)))
 	}
 	if spec.DistinguisherMethod != nil {
 		if !supportedDistinguisherMethods.Has(string(spec.DistinguisherMethod.Type)) {

pkg/apis/flowcontrol/validation/validation_test.go

@@ -547,6 +547,41 @@ func TestFlowSchemaValidation(t *testing.T) {
 				field.Invalid(field.NewPath("spec").Child("rules").Index(0).Child("resourceRules").Index(0).Child("namespaces").Index(0), "-foo", nsErrIntro+`a DNS-1123 label must consist of lower case alphanumeric characters or '-', and must start and end with an alphanumeric character (e.g. 'my-name',  or '123-abc', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?')`),
 			},
 		},
+		{
+			name: "MatchingPrecedence must not be greater than 10000",
+			flowSchema: &flowcontrol.FlowSchema{
+				ObjectMeta: metav1.ObjectMeta{
+					Name: "system-foo",
+				},
+				Spec: flowcontrol.FlowSchemaSpec{
+					MatchingPrecedence: 50000,
+					PriorityLevelConfiguration: flowcontrol.PriorityLevelConfigurationReference{
+						Name: "system-bar",
+					},
+					Rules: []flowcontrol.PolicyRulesWithSubjects{
+						{
+							Subjects: []flowcontrol.Subject{
+								{
+									Kind: flowcontrol.SubjectKindUser,
+									User: &flowcontrol.UserSubject{Name: "noxu"},
+								},
+							},
+							ResourceRules: []flowcontrol.ResourcePolicyRule{
+								{
+									Verbs:      []string{flowcontrol.VerbAll},
+									APIGroups:  []string{flowcontrol.APIGroupAll},
+									Resources:  []string{flowcontrol.ResourceAll},
+									Namespaces: []string{flowcontrol.NamespaceEvery},
+								},
+							},
+						},
+					},
+				},
+			},
+			expectedErrors: field.ErrorList{
+				field.Invalid(field.NewPath("spec").Child("matchingPrecedence"), int32(50000), "must not be greater than 10000"),
+			},
+		},
 	}
 	for _, testCase := range testCases {
 		t.Run(testCase.name, func(t *testing.T) {

staging/src/k8s.io/api/flowcontrol/v1alpha1/types.go

@@ -43,6 +43,11 @@ const (
 	PriorityLevelConfigurationConditionConcurrencyShared = "ConcurrencyShared"
 )
 
+// Constants used by api validation.
+const (
+	FlowSchemaMaxMatchingPrecedence int32 = 10000
+)
+
 // +genclient
 // +genclient:nonNamespaced
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
@@ -88,8 +93,8 @@ type FlowSchemaSpec struct {
 	PriorityLevelConfiguration PriorityLevelConfigurationReference `json:"priorityLevelConfiguration" protobuf:"bytes,1,opt,name=priorityLevelConfiguration"`
 	// `matchingPrecedence` is used to choose among the FlowSchemas that match a given request. The chosen
 	// FlowSchema is among those with the numerically lowest (which we take to be logically highest)
-	// MatchingPrecedence.  Each MatchingPrecedence value must be non-negative.
-	// Note that if the precedence is not specified or zero, it will be set to 1000 as default.
+	// MatchingPrecedence.  Each MatchingPrecedence value must be ranged in [1,10000].
+	// Note that if the precedence is not specified, it will be set to 1000 as default.
 	// +optional
 	MatchingPrecedence int32 `json:"matchingPrecedence" protobuf:"varint,2,opt,name=matchingPrecedence"`
 	// `distinguisherMethod` defines how to compute the flow distinguisher for requests that match this schema.