rebase: bump k8s.io/kubernetes from 1.26.2 to 1.27.2

Bumps [k8s.io/kubernetes](https://github.com/kubernetes/kubernetes) from 1.26.2 to 1.27.2.
- [Release notes](https://github.com/kubernetes/kubernetes/releases)
- [Commits](https://github.com/kubernetes/kubernetes/compare/v1.26.2...v1.27.2)

---
updated-dependencies:
- dependency-name: k8s.io/kubernetes
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/k8s.io/kube-openapi/pkg/validation/spec/header.go

@@ -43,6 +43,9 @@ type Header struct {
 
 // MarshalJSON marshal this to JSON
 func (h Header) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(h)
+	}
 	b1, err := json.Marshal(h.CommonValidations)
 	if err != nil {
 		return nil, err
@@ -62,6 +65,20 @@ func (h Header) MarshalJSON() ([]byte, error) {
 	return swag.ConcatJSON(b1, b2, b3, b4), nil
 }
 
+func (h Header) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	var x struct {
+		CommonValidations commonValidationsOmitZero `json:",inline"`
+		SimpleSchema      simpleSchemaOmitZero      `json:",inline"`
+		Extensions
+		HeaderProps
+	}
+	x.CommonValidations = commonValidationsOmitZero(h.CommonValidations)
+	x.SimpleSchema = simpleSchemaOmitZero(h.SimpleSchema)
+	x.Extensions = internal.SanitizeExtensions(h.Extensions)
+	x.HeaderProps = h.HeaderProps
+	return opts.MarshalNext(enc, x)
+}
+
 // UnmarshalJSON unmarshals this header from JSON
 func (h *Header) UnmarshalJSON(data []byte) error {
 	if internal.UseOptimizedJSONUnmarshaling {
@@ -94,12 +111,8 @@ func (h *Header) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Dec
 
 	h.CommonValidations = x.CommonValidations
 	h.SimpleSchema = x.SimpleSchema
-	h.Extensions = x.Extensions
+	h.Extensions = internal.SanitizeExtensions(x.Extensions)
 	h.HeaderProps = x.HeaderProps
 
-	h.Extensions.sanitize()
-	if len(h.Extensions) == 0 {
-		h.Extensions = nil
-	}
 	return nil
 }

vendor/k8s.io/kube-openapi/pkg/validation/spec/info.go

@@ -89,17 +89,9 @@ func (e Extensions) GetObject(key string, out interface{}) error {
 	return nil
 }
 
-func (e Extensions) sanitize() {
-	for k := range e {
-		if !isExtensionKey(k) {
-			delete(e, k)
-		}
-	}
-}
-
 func (e Extensions) sanitizeWithExtra() (extra map[string]any) {
 	for k, v := range e {
-		if !isExtensionKey(k) {
+		if !internal.IsExtensionKey(k) {
 			if extra == nil {
 				extra = make(map[string]any)
 			}
@@ -110,10 +102,6 @@ func (e Extensions) sanitizeWithExtra() (extra map[string]any) {
 	return extra
 }
 
-func isExtensionKey(k string) bool {
-	return len(k) > 1 && (k[0] == 'x' || k[0] == 'X') && k[1] == '-'
-}
-
 // VendorExtensible composition block.
 type VendorExtensible struct {
 	Extensions Extensions
@@ -181,6 +169,9 @@ type Info struct {
 
 // MarshalJSON marshal this to JSON
 func (i Info) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(i)
+	}
 	b1, err := json.Marshal(i.InfoProps)
 	if err != nil {
 		return nil, err
@@ -192,6 +183,16 @@ func (i Info) MarshalJSON() ([]byte, error) {
 	return swag.ConcatJSON(b1, b2), nil
 }
 
+func (i Info) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	var x struct {
+		Extensions
+		InfoProps
+	}
+	x.Extensions = i.Extensions
+	x.InfoProps = i.InfoProps
+	return opts.MarshalNext(enc, x)
+}
+
 // UnmarshalJSON marshal this from JSON
 func (i *Info) UnmarshalJSON(data []byte) error {
 	if internal.UseOptimizedJSONUnmarshaling {
@@ -212,11 +213,7 @@ func (i *Info) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decod
 	if err := opts.UnmarshalNext(dec, &x); err != nil {
 		return err
 	}
-	x.Extensions.sanitize()
-	if len(x.Extensions) == 0 {
-		x.Extensions = nil
-	}
-	i.VendorExtensible.Extensions = x.Extensions
+	i.Extensions = internal.SanitizeExtensions(x.Extensions)
 	i.InfoProps = x.InfoProps
 	return nil
 }

vendor/k8s.io/kube-openapi/pkg/validation/spec/items.go

@@ -37,6 +37,18 @@ type SimpleSchema struct {
 	Example          interface{} `json:"example,omitempty"`
 }
 
+// Marshaling structure only, always edit along with corresponding
+// struct (or compilation will fail).
+type simpleSchemaOmitZero struct {
+	Type             string      `json:"type,omitempty"`
+	Nullable         bool        `json:"nullable,omitzero"`
+	Format           string      `json:"format,omitempty"`
+	Items            *Items      `json:"items,omitzero"`
+	CollectionFormat string      `json:"collectionFormat,omitempty"`
+	Default          interface{} `json:"default,omitempty"`
+	Example          interface{} `json:"example,omitempty"`
+}
+
 // CommonValidations describe common JSON-schema validations
 type CommonValidations struct {
 	Maximum          *float64      `json:"maximum,omitempty"`
@@ -53,6 +65,23 @@ type CommonValidations struct {
 	Enum             []interface{} `json:"enum,omitempty"`
 }
 
+// Marshaling structure only, always edit along with corresponding
+// struct (or compilation will fail).
+type commonValidationsOmitZero struct {
+	Maximum          *float64      `json:"maximum,omitempty"`
+	ExclusiveMaximum bool          `json:"exclusiveMaximum,omitzero"`
+	Minimum          *float64      `json:"minimum,omitempty"`
+	ExclusiveMinimum bool          `json:"exclusiveMinimum,omitzero"`
+	MaxLength        *int64        `json:"maxLength,omitempty"`
+	MinLength        *int64        `json:"minLength,omitempty"`
+	Pattern          string        `json:"pattern,omitempty"`
+	MaxItems         *int64        `json:"maxItems,omitempty"`
+	MinItems         *int64        `json:"minItems,omitempty"`
+	UniqueItems      bool          `json:"uniqueItems,omitzero"`
+	MultipleOf       *float64      `json:"multipleOf,omitempty"`
+	Enum             []interface{} `json:"enum,omitempty"`
+}
+
 // Items a limited subset of JSON-Schema's items object.
 // It is used by parameter definitions that are not located in "body".
 //
@@ -105,18 +134,18 @@ func (i *Items) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Deco
 	if err := i.Refable.Ref.fromMap(x.Extensions); err != nil {
 		return err
 	}
-	x.Extensions.sanitize()
-	if len(x.Extensions) == 0 {
-		x.Extensions = nil
-	}
+
 	i.CommonValidations = x.CommonValidations
 	i.SimpleSchema = x.SimpleSchema
-	i.VendorExtensible.Extensions = x.Extensions
+	i.Extensions = internal.SanitizeExtensions(x.Extensions)
 	return nil
 }
 
 // MarshalJSON converts this items object to JSON
 func (i Items) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(i)
+	}
 	b1, err := json.Marshal(i.CommonValidations)
 	if err != nil {
 		return nil, err
@@ -135,3 +164,17 @@ func (i Items) MarshalJSON() ([]byte, error) {
 	}
 	return swag.ConcatJSON(b4, b3, b1, b2), nil
 }
+
+func (i Items) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	var x struct {
+		CommonValidations commonValidationsOmitZero `json:",inline"`
+		SimpleSchema      simpleSchemaOmitZero      `json:",inline"`
+		Ref               string                    `json:"$ref,omitempty"`
+		Extensions
+	}
+	x.CommonValidations = commonValidationsOmitZero(i.CommonValidations)
+	x.SimpleSchema = simpleSchemaOmitZero(i.SimpleSchema)
+	x.Ref = i.Refable.Ref.String()
+	x.Extensions = internal.SanitizeExtensions(i.Extensions)
+	return opts.MarshalNext(enc, x)
+}

vendor/k8s.io/kube-openapi/pkg/validation/spec/operation.go

@@ -42,6 +42,23 @@ type OperationProps struct {
 	Responses    *Responses             `json:"responses,omitempty"`
 }
 
+// Marshaling structure only, always edit along with corresponding
+// struct (or compilation will fail).
+type operationPropsOmitZero struct {
+	Description  string                 `json:"description,omitempty"`
+	Consumes     []string               `json:"consumes,omitempty"`
+	Produces     []string               `json:"produces,omitempty"`
+	Schemes      []string               `json:"schemes,omitempty"`
+	Tags         []string               `json:"tags,omitempty"`
+	Summary      string                 `json:"summary,omitempty"`
+	ExternalDocs *ExternalDocumentation `json:"externalDocs,omitzero"`
+	ID           string                 `json:"operationId,omitempty"`
+	Deprecated   bool                   `json:"deprecated,omitempty,omitzero"`
+	Security     []map[string][]string  `json:"security,omitempty"`
+	Parameters   []Parameter            `json:"parameters,omitempty"`
+	Responses    *Responses             `json:"responses,omitzero"`
+}
+
 // MarshalJSON takes care of serializing operation properties to JSON
 //
 // We use a custom marhaller here to handle a special cases related to
@@ -96,17 +113,16 @@ func (o *Operation) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.
 	if err := opts.UnmarshalNext(dec, &x); err != nil {
 		return err
 	}
-	x.Extensions.sanitize()
-	if len(x.Extensions) == 0 {
-		x.Extensions = nil
-	}
-	o.VendorExtensible.Extensions = x.Extensions
+	o.Extensions = internal.SanitizeExtensions(x.Extensions)
 	o.OperationProps = OperationProps(x.OperationPropsNoMethods)
 	return nil
 }
 
 // MarshalJSON converts this items object to JSON
 func (o Operation) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(o)
+	}
 	b1, err := json.Marshal(o.OperationProps)
 	if err != nil {
 		return nil, err
@@ -118,3 +134,13 @@ func (o Operation) MarshalJSON() ([]byte, error) {
 	concated := swag.ConcatJSON(b1, b2)
 	return concated, nil
 }
+
+func (o Operation) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	var x struct {
+		Extensions
+		OperationProps operationPropsOmitZero `json:",inline"`
+	}
+	x.Extensions = internal.SanitizeExtensions(o.Extensions)
+	x.OperationProps = operationPropsOmitZero(o.OperationProps)
+	return opts.MarshalNext(enc, x)
+}

vendor/k8s.io/kube-openapi/pkg/validation/spec/parameter.go

@@ -36,6 +36,17 @@ type ParamProps struct {
 	AllowEmptyValue bool    `json:"allowEmptyValue,omitempty"`
 }
 
+// Marshaling structure only, always edit along with corresponding
+// struct (or compilation will fail).
+type paramPropsOmitZero struct {
+	Description     string  `json:"description,omitempty"`
+	Name            string  `json:"name,omitempty"`
+	In              string  `json:"in,omitempty"`
+	Required        bool    `json:"required,omitzero"`
+	Schema          *Schema `json:"schema,omitzero"`
+	AllowEmptyValue bool    `json:"allowEmptyValue,omitzero"`
+}
+
 // Parameter a unique parameter is defined by a combination of a [name](#parameterName) and [location](#parameterIn).
 //
 // There are five possible parameter types.
@@ -109,19 +120,18 @@ func (p *Parameter) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.
 	if err := p.Refable.Ref.fromMap(x.Extensions); err != nil {
 		return err
 	}
-	x.Extensions.sanitize()
-	if len(x.Extensions) == 0 {
-		x.Extensions = nil
-	}
 	p.CommonValidations = x.CommonValidations
 	p.SimpleSchema = x.SimpleSchema
-	p.VendorExtensible.Extensions = x.Extensions
+	p.Extensions = internal.SanitizeExtensions(x.Extensions)
 	p.ParamProps = x.ParamProps
 	return nil
 }
 
 // MarshalJSON converts this items object to JSON
 func (p Parameter) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(p)
+	}
 	b1, err := json.Marshal(p.CommonValidations)
 	if err != nil {
 		return nil, err
@@ -144,3 +154,19 @@ func (p Parameter) MarshalJSON() ([]byte, error) {
 	}
 	return swag.ConcatJSON(b3, b1, b2, b4, b5), nil
 }
+
+func (p Parameter) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	var x struct {
+		CommonValidations commonValidationsOmitZero `json:",inline"`
+		SimpleSchema      simpleSchemaOmitZero      `json:",inline"`
+		ParamProps        paramPropsOmitZero        `json:",inline"`
+		Ref               string                    `json:"$ref,omitempty"`
+		Extensions
+	}
+	x.CommonValidations = commonValidationsOmitZero(p.CommonValidations)
+	x.SimpleSchema = simpleSchemaOmitZero(p.SimpleSchema)
+	x.Extensions = internal.SanitizeExtensions(p.Extensions)
+	x.ParamProps = paramPropsOmitZero(p.ParamProps)
+	x.Ref = p.Refable.Ref.String()
+	return opts.MarshalNext(enc, x)
+}

vendor/k8s.io/kube-openapi/pkg/validation/spec/path_item.go

@@ -70,24 +70,20 @@ func (p *PathItem) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.D
 	if err := opts.UnmarshalNext(dec, &x); err != nil {
 		return err
 	}
-
-	p.Extensions = x.Extensions
-	p.PathItemProps = x.PathItemProps
-
-	if err := p.Refable.Ref.fromMap(p.Extensions); err != nil {
+	if err := p.Refable.Ref.fromMap(x.Extensions); err != nil {
 		return err
 	}
-
-	p.Extensions.sanitize()
-	if len(p.Extensions) == 0 {
-		p.Extensions = nil
-	}
+	p.Extensions = internal.SanitizeExtensions(x.Extensions)
+	p.PathItemProps = x.PathItemProps
 
 	return nil
 }
 
 // MarshalJSON converts this items object to JSON
 func (p PathItem) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(p)
+	}
 	b3, err := json.Marshal(p.Refable)
 	if err != nil {
 		return nil, err
@@ -103,3 +99,15 @@ func (p PathItem) MarshalJSON() ([]byte, error) {
 	concated := swag.ConcatJSON(b3, b4, b5)
 	return concated, nil
 }
+
+func (p PathItem) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	var x struct {
+		Ref string `json:"$ref,omitempty"`
+		Extensions
+		PathItemProps
+	}
+	x.Ref = p.Refable.Ref.String()
+	x.Extensions = internal.SanitizeExtensions(p.Extensions)
+	x.PathItemProps = p.PathItemProps
+	return opts.MarshalNext(enc, x)
+}

vendor/k8s.io/kube-openapi/pkg/validation/spec/paths.go

@@ -92,7 +92,7 @@ func (p *Paths) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Deco
 			}
 
 			switch k := tok.String(); {
-			case isExtensionKey(k):
+			case internal.IsExtensionKey(k):
 				ext = nil
 				if err := opts.UnmarshalNext(dec, &ext); err != nil {
 					return err
@@ -114,7 +114,9 @@ func (p *Paths) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Deco
 				p.Paths[k] = pi
 			default:
 				_, err := dec.ReadValue() // skip value
-				return err
+				if err != nil {
+					return err
+				}
 			}
 		}
 	default:
@@ -124,6 +126,9 @@ func (p *Paths) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Deco
 
 // MarshalJSON converts this items object to JSON
 func (p Paths) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(p)
+	}
 	b1, err := json.Marshal(p.VendorExtensible)
 	if err != nil {
 		return nil, err
@@ -142,3 +147,18 @@ func (p Paths) MarshalJSON() ([]byte, error) {
 	concated := swag.ConcatJSON(b1, b2)
 	return concated, nil
 }
+
+func (p Paths) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	m := make(map[string]any, len(p.Extensions)+len(p.Paths))
+	for k, v := range p.Extensions {
+		if internal.IsExtensionKey(k) {
+			m[k] = v
+		}
+	}
+	for k, v := range p.Paths {
+		if strings.HasPrefix(k, "/") {
+			m[k] = v
+		}
+	}
+	return opts.MarshalNext(enc, m)
+}

vendor/k8s.io/kube-openapi/pkg/validation/spec/ref.go

@@ -21,6 +21,8 @@ import (
 	"path/filepath"
 
 	"github.com/go-openapi/jsonreference"
+
+	"k8s.io/kube-openapi/pkg/internal"
 )
 
 // Refable is a struct for things that accept a $ref property
@@ -149,19 +151,5 @@ func (r *Ref) UnmarshalJSON(d []byte) error {
 }
 
 func (r *Ref) fromMap(v map[string]interface{}) error {
-	if v == nil {
-		return nil
-	}
-
-	if vv, ok := v["$ref"]; ok {
-		if str, ok := vv.(string); ok {
-			ref, err := jsonreference.New(str)
-			if err != nil {
-				return err
-			}
-			*r = Ref{Ref: ref}
-		}
-	}
-
-	return nil
+	return internal.JSONRefFromMap(&r.Ref, v)
 }

vendor/k8s.io/kube-openapi/pkg/validation/spec/response.go

@@ -30,6 +30,15 @@ type ResponseProps struct {
 	Examples    map[string]interface{} `json:"examples,omitempty"`
 }
 
+// Marshaling structure only, always edit along with corresponding
+// struct (or compilation will fail).
+type responsePropsOmitZero struct {
+	Description string                 `json:"description,omitempty"`
+	Schema      *Schema                `json:"schema,omitzero"`
+	Headers     map[string]Header      `json:"headers,omitempty"`
+	Examples    map[string]interface{} `json:"examples,omitempty"`
+}
+
 // Response describes a single response from an API Operation.
 //
 // For more information: http://goo.gl/8us55a#responseObject
@@ -68,23 +77,20 @@ func (r *Response) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.D
 		return err
 	}
 
-	r.Extensions = x.Extensions
-	r.ResponseProps = x.ResponseProps
-
-	if err := r.Refable.Ref.fromMap(r.Extensions); err != nil {
+	if err := r.Refable.Ref.fromMap(x.Extensions); err != nil {
 		return err
 	}
-
-	r.Extensions.sanitize()
-	if len(r.Extensions) == 0 {
-		r.Extensions = nil
-	}
+	r.Extensions = internal.SanitizeExtensions(x.Extensions)
+	r.ResponseProps = x.ResponseProps
 
 	return nil
 }
 
 // MarshalJSON converts this items object to JSON
 func (r Response) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(r)
+	}
 	b1, err := json.Marshal(r.ResponseProps)
 	if err != nil {
 		return nil, err
@@ -100,6 +106,18 @@ func (r Response) MarshalJSON() ([]byte, error) {
 	return swag.ConcatJSON(b1, b2, b3), nil
 }
 
+func (r Response) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	var x struct {
+		Ref string `json:"$ref,omitempty"`
+		Extensions
+		ResponseProps responsePropsOmitZero `json:",inline"`
+	}
+	x.Ref = r.Refable.Ref.String()
+	x.Extensions = internal.SanitizeExtensions(r.Extensions)
+	x.ResponseProps = responsePropsOmitZero(r.ResponseProps)
+	return opts.MarshalNext(enc, x)
+}
+
 // NewResponse creates a new response instance
 func NewResponse() *Response {
 	return new(Response)

vendor/k8s.io/kube-openapi/pkg/validation/spec/responses.go

@@ -63,6 +63,9 @@ func (r *Responses) UnmarshalJSON(data []byte) error {
 
 // MarshalJSON converts this items object to JSON
 func (r Responses) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(r)
+	}
 	b1, err := json.Marshal(r.ResponsesProps)
 	if err != nil {
 		return nil, err
@@ -75,6 +78,25 @@ func (r Responses) MarshalJSON() ([]byte, error) {
 	return concated, nil
 }
 
+func (r Responses) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	type ArbitraryKeys map[string]interface{}
+	var x struct {
+		ArbitraryKeys
+		Default *Response `json:"default,omitempty"`
+	}
+	x.ArbitraryKeys = make(map[string]any, len(r.Extensions)+len(r.StatusCodeResponses))
+	for k, v := range r.Extensions {
+		if internal.IsExtensionKey(k) {
+			x.ArbitraryKeys[k] = v
+		}
+	}
+	for k, v := range r.StatusCodeResponses {
+		x.ArbitraryKeys[strconv.Itoa(k)] = v
+	}
+	x.Default = r.Default
+	return opts.MarshalNext(enc, x)
+}
+
 // ResponsesProps describes all responses for an operation.
 // It tells what is the default response and maps all responses with a
 // HTTP status code.
@@ -148,7 +170,7 @@ func (r *Responses) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.
 				return nil
 			}
 			switch k := tok.String(); {
-			case isExtensionKey(k):
+			case internal.IsExtensionKey(k):
 				ext = nil
 				if err := opts.UnmarshalNext(dec, &ext); err != nil {
 					return err

vendor/k8s.io/kube-openapi/pkg/validation/spec/schema.go

@@ -196,6 +196,46 @@ type SchemaProps struct {
 	Definitions          Definitions       `json:"definitions,omitempty"`
 }
 
+// Marshaling structure only, always edit along with corresponding
+// struct (or compilation will fail).
+type schemaPropsOmitZero struct {
+	ID                   string            `json:"id,omitempty"`
+	Ref                  Ref               `json:"-"`
+	Schema               SchemaURL         `json:"-"`
+	Description          string            `json:"description,omitempty"`
+	Type                 StringOrArray     `json:"type,omitzero"`
+	Nullable             bool              `json:"nullable,omitzero"`
+	Format               string            `json:"format,omitempty"`
+	Title                string            `json:"title,omitempty"`
+	Default              interface{}       `json:"default,omitzero"`
+	Maximum              *float64          `json:"maximum,omitempty"`
+	ExclusiveMaximum     bool              `json:"exclusiveMaximum,omitzero"`
+	Minimum              *float64          `json:"minimum,omitempty"`
+	ExclusiveMinimum     bool              `json:"exclusiveMinimum,omitzero"`
+	MaxLength            *int64            `json:"maxLength,omitempty"`
+	MinLength            *int64            `json:"minLength,omitempty"`
+	Pattern              string            `json:"pattern,omitempty"`
+	MaxItems             *int64            `json:"maxItems,omitempty"`
+	MinItems             *int64            `json:"minItems,omitempty"`
+	UniqueItems          bool              `json:"uniqueItems,omitzero"`
+	MultipleOf           *float64          `json:"multipleOf,omitempty"`
+	Enum                 []interface{}     `json:"enum,omitempty"`
+	MaxProperties        *int64            `json:"maxProperties,omitempty"`
+	MinProperties        *int64            `json:"minProperties,omitempty"`
+	Required             []string          `json:"required,omitempty"`
+	Items                *SchemaOrArray    `json:"items,omitzero"`
+	AllOf                []Schema          `json:"allOf,omitempty"`
+	OneOf                []Schema          `json:"oneOf,omitempty"`
+	AnyOf                []Schema          `json:"anyOf,omitempty"`
+	Not                  *Schema           `json:"not,omitzero"`
+	Properties           map[string]Schema `json:"properties,omitempty"`
+	AdditionalProperties *SchemaOrBool     `json:"additionalProperties,omitzero"`
+	PatternProperties    map[string]Schema `json:"patternProperties,omitempty"`
+	Dependencies         Dependencies      `json:"dependencies,omitempty"`
+	AdditionalItems      *SchemaOrBool     `json:"additionalItems,omitzero"`
+	Definitions          Definitions       `json:"definitions,omitempty"`
+}
+
 // SwaggerSchemaProps are additional properties supported by swagger schemas, but not JSON-schema (draft 4)
 type SwaggerSchemaProps struct {
 	Discriminator string                 `json:"discriminator,omitempty"`
@@ -204,6 +244,15 @@ type SwaggerSchemaProps struct {
 	Example       interface{}            `json:"example,omitempty"`
 }
 
+// Marshaling structure only, always edit along with corresponding
+// struct (or compilation will fail).
+type swaggerSchemaPropsOmitZero struct {
+	Discriminator string                 `json:"discriminator,omitempty"`
+	ReadOnly      bool                   `json:"readOnly,omitzero"`
+	ExternalDocs  *ExternalDocumentation `json:"externalDocs,omitzero"`
+	Example       interface{}            `json:"example,omitempty"`
+}
+
 // Schema the schema object allows the definition of input and output data types.
 // These types can be objects, but also primitives and arrays.
 // This object is based on the [JSON Schema Specification Draft 4](http://json-schema.org/)
@@ -434,6 +483,9 @@ func (s *Schema) WithExternalDocs(description, url string) *Schema {
 
 // MarshalJSON marshal this to JSON
 func (s Schema) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(s)
+	}
 	b1, err := json.Marshal(s.SchemaProps)
 	if err != nil {
 		return nil, fmt.Errorf("schema props %v", err)
@@ -465,6 +517,31 @@ func (s Schema) MarshalJSON() ([]byte, error) {
 	return swag.ConcatJSON(b1, b2, b3, b4, b5, b6), nil
 }
 
+func (s Schema) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	type ArbitraryKeys map[string]interface{}
+	var x struct {
+		ArbitraryKeys
+		SchemaProps        schemaPropsOmitZero        `json:",inline"`
+		SwaggerSchemaProps swaggerSchemaPropsOmitZero `json:",inline"`
+		Schema             string                     `json:"$schema,omitempty"`
+		Ref                string                     `json:"$ref,omitempty"`
+	}
+	x.ArbitraryKeys = make(map[string]any, len(s.Extensions)+len(s.ExtraProps))
+	for k, v := range s.Extensions {
+		if internal.IsExtensionKey(k) {
+			x.ArbitraryKeys[k] = v
+		}
+	}
+	for k, v := range s.ExtraProps {
+		x.ArbitraryKeys[k] = v
+	}
+	x.SchemaProps = schemaPropsOmitZero(s.SchemaProps)
+	x.SwaggerSchemaProps = swaggerSchemaPropsOmitZero(s.SwaggerSchemaProps)
+	x.Ref = s.Ref.String()
+	x.Schema = string(s.Schema)
+	return opts.MarshalNext(enc, x)
+}
+
 // UnmarshalJSON marshal this from JSON
 func (s *Schema) UnmarshalJSON(data []byte) error {
 	if internal.UseOptimizedJSONUnmarshaling {
@@ -547,7 +624,7 @@ func (s *Schema) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Dec
 	}
 
 	s.ExtraProps = x.Extensions.sanitizeWithExtra()
-	s.VendorExtensible.Extensions = x.Extensions
+	s.Extensions = internal.SanitizeExtensions(x.Extensions)
 	s.SchemaProps = x.SchemaProps
 	s.SwaggerSchemaProps = x.SwaggerSchemaProps
 	return nil

vendor/k8s.io/kube-openapi/pkg/validation/spec/security_scheme.go

@@ -18,6 +18,7 @@ import (
 	"encoding/json"
 
 	"github.com/go-openapi/swag"
+	"k8s.io/kube-openapi/pkg/internal"
 	jsonv2 "k8s.io/kube-openapi/pkg/internal/third_party/go-json-experiment/json"
 )
 
@@ -45,6 +46,9 @@ type SecurityScheme struct {
 
 // MarshalJSON marshal this to JSON
 func (s SecurityScheme) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(s)
+	}
 	b1, err := json.Marshal(s.SecuritySchemeProps)
 	if err != nil {
 		return nil, err
@@ -56,6 +60,16 @@ func (s SecurityScheme) MarshalJSON() ([]byte, error) {
 	return swag.ConcatJSON(b1, b2), nil
 }
 
+func (s SecurityScheme) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	var x struct {
+		Extensions
+		SecuritySchemeProps
+	}
+	x.Extensions = internal.SanitizeExtensions(s.Extensions)
+	x.SecuritySchemeProps = s.SecuritySchemeProps
+	return opts.MarshalNext(enc, x)
+}
+
 // UnmarshalJSON marshal this from JSON
 func (s *SecurityScheme) UnmarshalJSON(data []byte) error {
 	if err := json.Unmarshal(data, &s.SecuritySchemeProps); err != nil {
@@ -72,11 +86,7 @@ func (s *SecurityScheme) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *js
 	if err := opts.UnmarshalNext(dec, &x); err != nil {
 		return err
 	}
-	x.Extensions.sanitize()
-	if len(x.Extensions) == 0 {
-		x.Extensions = nil
-	}
-	s.VendorExtensible.Extensions = x.Extensions
+	s.Extensions = internal.SanitizeExtensions(x.Extensions)
 	s.SecuritySchemeProps = x.SecuritySchemeProps
 	return nil
 }

vendor/k8s.io/kube-openapi/pkg/validation/spec/swagger.go

@@ -35,6 +35,9 @@ type Swagger struct {
 
 // MarshalJSON marshals this swagger structure to json
 func (s Swagger) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(s)
+	}
 	b1, err := json.Marshal(s.SwaggerProps)
 	if err != nil {
 		return nil, err
@@ -46,12 +49,22 @@ func (s Swagger) MarshalJSON() ([]byte, error) {
 	return swag.ConcatJSON(b1, b2), nil
 }
 
+// MarshalJSON marshals this swagger structure to json
+func (s Swagger) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	var x struct {
+		Extensions
+		SwaggerProps
+	}
+	x.Extensions = internal.SanitizeExtensions(s.Extensions)
+	x.SwaggerProps = s.SwaggerProps
+	return opts.MarshalNext(enc, x)
+}
+
 // UnmarshalJSON unmarshals a swagger spec from json
 func (s *Swagger) UnmarshalJSON(data []byte) error {
 	if internal.UseOptimizedJSONUnmarshaling {
 		return jsonv2.Unmarshal(data, s)
 	}
-
 	var sw Swagger
 	if err := json.Unmarshal(data, &sw.SwaggerProps); err != nil {
 		return err
@@ -75,15 +88,8 @@ func (s *Swagger) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.De
 	if err := opts.UnmarshalNext(dec, &x); err != nil {
 		return err
 	}
-
-	s.Extensions = x.Extensions
+	s.Extensions = internal.SanitizeExtensions(x.Extensions)
 	s.SwaggerProps = x.SwaggerProps
-
-	s.Extensions.sanitize()
-	if len(s.Extensions) == 0 {
-		s.Extensions = nil
-	}
-
 	return nil
 }
 
@@ -126,6 +132,9 @@ var jsFalse = []byte("false")
 
 // MarshalJSON convert this object to JSON
 func (s SchemaOrBool) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(s)
+	}
 	if s.Schema != nil {
 		return json.Marshal(s.Schema)
 	}
@@ -136,6 +145,18 @@ func (s SchemaOrBool) MarshalJSON() ([]byte, error) {
 	return jsTrue, nil
 }
 
+// MarshalJSON convert this object to JSON
+func (s SchemaOrBool) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	if s.Schema != nil {
+		return opts.MarshalNext(enc, s.Schema)
+	}
+
+	if s.Schema == nil && !s.Allows {
+		return enc.WriteToken(jsonv2.False)
+	}
+	return enc.WriteToken(jsonv2.True)
+}
+
 // UnmarshalJSON converts this bool or schema object from a JSON structure
 func (s *SchemaOrBool) UnmarshalJSON(data []byte) error {
 	if internal.UseOptimizedJSONUnmarshaling {
@@ -143,15 +164,15 @@ func (s *SchemaOrBool) UnmarshalJSON(data []byte) error {
 	}
 
 	var nw SchemaOrBool
-	if len(data) >= 4 {
-		if data[0] == '{' {
-			var sch Schema
-			if err := json.Unmarshal(data, &sch); err != nil {
-				return err
-			}
-			nw.Schema = &sch
+	if len(data) > 0 && data[0] == '{' {
+		var sch Schema
+		if err := json.Unmarshal(data, &sch); err != nil {
+			return err
 		}
-		nw.Allows = !(data[0] == 'f' && data[1] == 'a' && data[2] == 'l' && data[3] == 's' && data[4] == 'e')
+		nw.Schema = &sch
+		nw.Allows = true
+	} else {
+		json.Unmarshal(data, &nw.Allows)
 	}
 	*s = nw
 	return nil
@@ -185,6 +206,9 @@ type SchemaOrStringArray struct {
 
 // MarshalJSON converts this schema object or array into JSON structure
 func (s SchemaOrStringArray) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(s)
+	}
 	if len(s.Property) > 0 {
 		return json.Marshal(s.Property)
 	}
@@ -194,6 +218,17 @@ func (s SchemaOrStringArray) MarshalJSON() ([]byte, error) {
 	return []byte("null"), nil
 }
 
+// MarshalJSON converts this schema object or array into JSON structure
+func (s SchemaOrStringArray) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	if len(s.Property) > 0 {
+		return opts.MarshalNext(enc, s.Property)
+	}
+	if s.Schema != nil {
+		return opts.MarshalNext(enc, s.Schema)
+	}
+	return enc.WriteToken(jsonv2.Null)
+}
+
 // UnmarshalJSON converts this schema object or array from a JSON structure
 func (s *SchemaOrStringArray) UnmarshalJSON(data []byte) error {
 	if internal.UseOptimizedJSONUnmarshaling {
@@ -347,12 +382,23 @@ func (s *SchemaOrArray) ContainsType(name string) bool {
 
 // MarshalJSON converts this schema object or array into JSON structure
 func (s SchemaOrArray) MarshalJSON() ([]byte, error) {
-	if len(s.Schemas) > 0 {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(s)
+	}
+	if s.Schemas != nil {
 		return json.Marshal(s.Schemas)
 	}
 	return json.Marshal(s.Schema)
 }
 
+// MarshalJSON converts this schema object or array into JSON structure
+func (s SchemaOrArray) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	if s.Schemas != nil {
+		return opts.MarshalNext(enc, s.Schemas)
+	}
+	return opts.MarshalNext(enc, s.Schema)
+}
+
 // UnmarshalJSON converts this schema object or array from a JSON structure
 func (s *SchemaOrArray) UnmarshalJSON(data []byte) error {
 	if internal.UseOptimizedJSONUnmarshaling {

vendor/k8s.io/kube-openapi/pkg/validation/spec/tag.go

@@ -41,6 +41,9 @@ type Tag struct {
 
 // MarshalJSON marshal this to JSON
 func (t Tag) MarshalJSON() ([]byte, error) {
+	if internal.UseOptimizedJSONMarshaling {
+		return internal.DeterministicMarshal(t)
+	}
 	b1, err := json.Marshal(t.TagProps)
 	if err != nil {
 		return nil, err
@@ -52,6 +55,16 @@ func (t Tag) MarshalJSON() ([]byte, error) {
 	return swag.ConcatJSON(b1, b2), nil
 }
 
+func (t Tag) MarshalNextJSON(opts jsonv2.MarshalOptions, enc *jsonv2.Encoder) error {
+	var x struct {
+		Extensions
+		TagProps
+	}
+	x.Extensions = internal.SanitizeExtensions(t.Extensions)
+	x.TagProps = t.TagProps
+	return opts.MarshalNext(enc, x)
+}
+
 // UnmarshalJSON marshal this from JSON
 func (t *Tag) UnmarshalJSON(data []byte) error {
 	if internal.UseOptimizedJSONUnmarshaling {
@@ -72,11 +85,7 @@ func (t *Tag) UnmarshalNextJSON(opts jsonv2.UnmarshalOptions, dec *jsonv2.Decode
 	if err := opts.UnmarshalNext(dec, &x); err != nil {
 		return err
 	}
-	x.Extensions.sanitize()
-	if len(x.Extensions) == 0 {
-		x.Extensions = nil
-	}
-	t.VendorExtensible.Extensions = x.Extensions
+	t.Extensions = internal.SanitizeExtensions(x.Extensions)
 	t.TagProps = x.TagProps
 	return nil
 }