vendor/k8s.io/apimachinery/pkg/api/validation/objectmeta.go - cloudstack-kubernetes-provider - Git at Google

 /*
 Copyright 2014 The Kubernetes Authors.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

 package validation

 import (
 	"fmt"
 	"strings"

 	apiequality "k8s.io/apimachinery/pkg/api/equality"
 	"k8s.io/apimachinery/pkg/api/meta"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	v1validation "k8s.io/apimachinery/pkg/apis/meta/v1/validation"
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/apimachinery/pkg/util/sets"
 	"k8s.io/apimachinery/pkg/util/validation"
 	"k8s.io/apimachinery/pkg/util/validation/field"
 )

 const FieldImmutableErrorMsg string = `field is immutable`

 const totalAnnotationSizeLimitB int = 256 * (1 << 10) // 256 kB

 // BannedOwners is a black list of object that are not allowed to be owners.
 var BannedOwners = map[schema.GroupVersionKind]struct{}{
 	{Group: "", Version: "v1", Kind: "Event"}: {},
 }

 // ValidateClusterName can be used to check whether the given cluster name is valid.
 var ValidateClusterName = NameIsDNS1035Label

 // ValidateAnnotations validates that a set of annotations are correctly defined.
 func ValidateAnnotations(annotations map[string]string, fldPath *field.Path) field.ErrorList {
 	allErrs := field.ErrorList{}
 	var totalSize int64
 	for k, v := range annotations {
 		for _, msg := range validation.IsQualifiedName(strings.ToLower(k)) {
 			allErrs = append(allErrs, field.Invalid(fldPath, k, msg))
 		}
 		totalSize += (int64)(len(k)) + (int64)(len(v))
 	}
 	if totalSize > (int64)(totalAnnotationSizeLimitB) {
 		allErrs = append(allErrs, field.TooLong(fldPath, "", totalAnnotationSizeLimitB))
 	}
 	return allErrs
 }

 func validateOwnerReference(ownerReference metav1.OwnerReference, fldPath *field.Path) field.ErrorList {
 	allErrs := field.ErrorList{}
 	gvk := schema.FromAPIVersionAndKind(ownerReference.APIVersion, ownerReference.Kind)
 	// gvk.Group is empty for the legacy group.
 	if len(gvk.Version) == 0 {
 		allErrs = append(allErrs, field.Invalid(fldPath.Child("apiVersion"), ownerReference.APIVersion, "version must not be empty"))
 	}
 	if len(gvk.Kind) == 0 {
 		allErrs = append(allErrs, field.Invalid(fldPath.Child("kind"), ownerReference.Kind, "kind must not be empty"))
 	}
 	if len(ownerReference.Name) == 0 {
 		allErrs = append(allErrs, field.Invalid(fldPath.Child("name"), ownerReference.Name, "name must not be empty"))
 	}
 	if len(ownerReference.UID) == 0 {
 		allErrs = append(allErrs, field.Invalid(fldPath.Child("uid"), ownerReference.UID, "uid must not be empty"))
 	}
 	if _, ok := BannedOwners[gvk]; ok {
 		allErrs = append(allErrs, field.Invalid(fldPath, ownerReference, fmt.Sprintf("%s is disallowed from being an owner", gvk)))
 	}
 	return allErrs
 }

 func ValidateOwnerReferences(ownerReferences []metav1.OwnerReference, fldPath *field.Path) field.ErrorList {
 	allErrs := field.ErrorList{}
 	controllerName := ""
 	for _, ref := range ownerReferences {
 		allErrs = append(allErrs, validateOwnerReference(ref, fldPath)...)
 		if ref.Controller != nil && *ref.Controller {
 			if controllerName != "" {
 				allErrs = append(allErrs, field.Invalid(fldPath, ownerReferences,
 					fmt.Sprintf("Only one reference can have Controller set to true. Found \"true\" in references for %v and %v", controllerName, ref.Name)))
 			} else {
 				controllerName = ref.Name
 			}
 		}
 	}
 	return allErrs
 }

 // Validate finalizer names
 func ValidateFinalizerName(stringValue string, fldPath *field.Path) field.ErrorList {
 	allErrs := field.ErrorList{}
 	for _, msg := range validation.IsQualifiedName(stringValue) {
 		allErrs = append(allErrs, field.Invalid(fldPath, stringValue, msg))
 	}

 	return allErrs
 }

 func ValidateNoNewFinalizers(newFinalizers []string, oldFinalizers []string, fldPath *field.Path) field.ErrorList {
 	allErrs := field.ErrorList{}
 	extra := sets.NewString(newFinalizers...).Difference(sets.NewString(oldFinalizers...))
 	if len(extra) != 0 {
 		allErrs = append(allErrs, field.Forbidden(fldPath, fmt.Sprintf("no new finalizers can be added if the object is being deleted, found new finalizers %#v", extra.List())))
 	}
 	return allErrs
 }

 func ValidateImmutableField(newVal, oldVal interface{}, fldPath *field.Path) field.ErrorList {
 	allErrs := field.ErrorList{}
 	if !apiequality.Semantic.DeepEqual(oldVal, newVal) {
 		allErrs = append(allErrs, field.Invalid(fldPath, newVal, FieldImmutableErrorMsg))
 	}
 	return allErrs
 }

 // ValidateObjectMeta validates an object's metadata on creation. It expects that name generation has already
 // been performed.
 // It doesn't return an error for rootscoped resources with namespace, because namespace should already be cleared before.
 func ValidateObjectMeta(objMeta *metav1.ObjectMeta, requiresNamespace bool, nameFn ValidateNameFunc, fldPath *field.Path) field.ErrorList {
 	metadata, err := meta.Accessor(objMeta)
 	if err != nil {
 		allErrs := field.ErrorList{}
 		allErrs = append(allErrs, field.Invalid(fldPath, objMeta, err.Error()))
 		return allErrs
 	}
 	return ValidateObjectMetaAccessor(metadata, requiresNamespace, nameFn, fldPath)
 }

 // ValidateObjectMeta validates an object's metadata on creation. It expects that name generation has already
 // been performed.
 // It doesn't return an error for rootscoped resources with namespace, because namespace should already be cleared before.
 func ValidateObjectMetaAccessor(meta metav1.Object, requiresNamespace bool, nameFn ValidateNameFunc, fldPath *field.Path) field.ErrorList {
 	allErrs := field.ErrorList{}

 	if len(meta.GetGenerateName()) != 0 {
 		for _, msg := range nameFn(meta.GetGenerateName(), true) {
 			allErrs = append(allErrs, field.Invalid(fldPath.Child("generateName"), meta.GetGenerateName(), msg))
 		}
 	}
 	// If the generated name validates, but the calculated value does not, it's a problem with generation, and we
 	// report it here. This may confuse users, but indicates a programming bug and still must be validated.
 	// If there are multiple fields out of which one is required then add an or as a separator
 	if len(meta.GetName()) == 0 {
 		allErrs = append(allErrs, field.Required(fldPath.Child("name"), "name or generateName is required"))
 	} else {
 		for _, msg := range nameFn(meta.GetName(), false) {
 			allErrs = append(allErrs, field.Invalid(fldPath.Child("name"), meta.GetName(), msg))
 		}
 	}
 	if requiresNamespace {
 		if len(meta.GetNamespace()) == 0 {
 			allErrs = append(allErrs, field.Required(fldPath.Child("namespace"), ""))
 		} else {
 			for _, msg := range ValidateNamespaceName(meta.GetNamespace(), false) {
 				allErrs = append(allErrs, field.Invalid(fldPath.Child("namespace"), meta.GetNamespace(), msg))
 			}
 		}
 	} else {
 		if len(meta.GetNamespace()) != 0 {
 			allErrs = append(allErrs, field.Forbidden(fldPath.Child("namespace"), "not allowed on this type"))
 		}
 	}
 	if len(meta.GetClusterName()) != 0 {
 		for _, msg := range ValidateClusterName(meta.GetClusterName(), false) {
 			allErrs = append(allErrs, field.Invalid(fldPath.Child("clusterName"), meta.GetClusterName(), msg))
 		}
 	}
 	allErrs = append(allErrs, ValidateNonnegativeField(meta.GetGeneration(), fldPath.Child("generation"))...)
 	allErrs = append(allErrs, v1validation.ValidateLabels(meta.GetLabels(), fldPath.Child("labels"))...)
 	allErrs = append(allErrs, ValidateAnnotations(meta.GetAnnotations(), fldPath.Child("annotations"))...)
 	allErrs = append(allErrs, ValidateOwnerReferences(meta.GetOwnerReferences(), fldPath.Child("ownerReferences"))...)
 	allErrs = append(allErrs, ValidateInitializers(meta.GetInitializers(), fldPath.Child("initializers"))...)
 	allErrs = append(allErrs, ValidateFinalizers(meta.GetFinalizers(), fldPath.Child("finalizers"))...)
 	return allErrs
 }

 func ValidateInitializers(initializers *metav1.Initializers, fldPath *field.Path) field.ErrorList {
 	var allErrs field.ErrorList
 	if initializers == nil {
 		return allErrs
 	}
 	for i, initializer := range initializers.Pending {
 		allErrs = append(allErrs, validation.IsFullyQualifiedName(fldPath.Child("pending").Index(i).Child("name"), initializer.Name)...)
 	}
 	allErrs = append(allErrs, validateInitializersResult(initializers.Result, fldPath.Child("result"))...)
 	return allErrs
 }

 func validateInitializersResult(result *metav1.Status, fldPath *field.Path) field.ErrorList {
 	var allErrs field.ErrorList
 	if result == nil {
 		return allErrs
 	}
 	switch result.Status {
 	case metav1.StatusFailure:
 	default:
 		allErrs = append(allErrs, field.Invalid(fldPath.Child("status"), result.Status, "must be 'Failure'"))
 	}
 	return allErrs
 }

 // ValidateFinalizers tests if the finalizers name are valid, and if there are conflicting finalizers.
 func ValidateFinalizers(finalizers []string, fldPath *field.Path) field.ErrorList {
 	allErrs := field.ErrorList{}
 	hasFinalizerOrphanDependents := false
 	hasFinalizerDeleteDependents := false
 	for _, finalizer := range finalizers {
 		allErrs = append(allErrs, ValidateFinalizerName(finalizer, fldPath)...)
 		if finalizer == metav1.FinalizerOrphanDependents {
 			hasFinalizerOrphanDependents = true
 		}
 		if finalizer == metav1.FinalizerDeleteDependents {
 			hasFinalizerDeleteDependents = true
 		}
 	}
 	if hasFinalizerDeleteDependents && hasFinalizerOrphanDependents {
 		allErrs = append(allErrs, field.Invalid(fldPath, finalizers, fmt.Sprintf("finalizer %s and %s cannot be both set", metav1.FinalizerOrphanDependents, metav1.FinalizerDeleteDependents)))
 	}
 	return allErrs
 }

 // ValidateObjectMetaUpdate validates an object's metadata when updated
 func ValidateObjectMetaUpdate(newMeta, oldMeta *metav1.ObjectMeta, fldPath *field.Path) field.ErrorList {
 	newMetadata, err := meta.Accessor(newMeta)
 	if err != nil {
 		allErrs := field.ErrorList{}
 		allErrs = append(allErrs, field.Invalid(fldPath, newMeta, err.Error()))
 		return allErrs
 	}
 	oldMetadata, err := meta.Accessor(oldMeta)
 	if err != nil {
 		allErrs := field.ErrorList{}
 		allErrs = append(allErrs, field.Invalid(fldPath, oldMeta, err.Error()))
 		return allErrs
 	}
 	return ValidateObjectMetaAccessorUpdate(newMetadata, oldMetadata, fldPath)
 }

 func ValidateObjectMetaAccessorUpdate(newMeta, oldMeta metav1.Object, fldPath *field.Path) field.ErrorList {
 	var allErrs field.ErrorList

 	// Finalizers cannot be added if the object is already being deleted.
 	if oldMeta.GetDeletionTimestamp() != nil {
 		allErrs = append(allErrs, ValidateNoNewFinalizers(newMeta.GetFinalizers(), oldMeta.GetFinalizers(), fldPath.Child("finalizers"))...)
 	}

 	// Reject updates that don't specify a resource version
 	if len(newMeta.GetResourceVersion()) == 0 {
 		allErrs = append(allErrs, field.Invalid(fldPath.Child("resourceVersion"), newMeta.GetResourceVersion(), "must be specified for an update"))
 	}

 	// Generation shouldn't be decremented
 	if newMeta.GetGeneration() < oldMeta.GetGeneration() {
 		allErrs = append(allErrs, field.Invalid(fldPath.Child("generation"), newMeta.GetGeneration(), "must not be decremented"))
 	}

 	allErrs = append(allErrs, ValidateInitializersUpdate(newMeta.GetInitializers(), oldMeta.GetInitializers(), fldPath.Child("initializers"))...)

 	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetName(), oldMeta.GetName(), fldPath.Child("name"))...)
 	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetNamespace(), oldMeta.GetNamespace(), fldPath.Child("namespace"))...)
 	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetUID(), oldMeta.GetUID(), fldPath.Child("uid"))...)
 	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetCreationTimestamp(), oldMeta.GetCreationTimestamp(), fldPath.Child("creationTimestamp"))...)
 	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetDeletionTimestamp(), oldMeta.GetDeletionTimestamp(), fldPath.Child("deletionTimestamp"))...)
 	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetDeletionGracePeriodSeconds(), oldMeta.GetDeletionGracePeriodSeconds(), fldPath.Child("deletionGracePeriodSeconds"))...)
 	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetClusterName(), oldMeta.GetClusterName(), fldPath.Child("clusterName"))...)

 	allErrs = append(allErrs, v1validation.ValidateLabels(newMeta.GetLabels(), fldPath.Child("labels"))...)
 	allErrs = append(allErrs, ValidateAnnotations(newMeta.GetAnnotations(), fldPath.Child("annotations"))...)
 	allErrs = append(allErrs, ValidateOwnerReferences(newMeta.GetOwnerReferences(), fldPath.Child("ownerReferences"))...)

 	return allErrs
 }

 // ValidateInitializersUpdate checks the update of the metadata initializers field
 func ValidateInitializersUpdate(newInit, oldInit *metav1.Initializers, fldPath *field.Path) field.ErrorList {
 	var allErrs field.ErrorList
 	switch {
 	case oldInit == nil && newInit != nil:
 		// Initializers may not be set on new objects
 		allErrs = append(allErrs, field.Invalid(fldPath, nil, "field is immutable once initialization has completed"))
 	case oldInit != nil && newInit == nil:
 		// this is a valid transition and means initialization was successful
 	case oldInit != nil && newInit != nil:
 		// validate changes to initializers
 		switch {
 		case oldInit.Result == nil && newInit.Result != nil:
 			// setting a result is allowed
 			allErrs = append(allErrs, validateInitializersResult(newInit.Result, fldPath.Child("result"))...)
 		case oldInit.Result != nil:
 			// setting Result implies permanent failure, and all future updates will be prevented
 			allErrs = append(allErrs, ValidateImmutableField(newInit.Result, oldInit.Result, fldPath.Child("result"))...)
 		default:
 			// leaving the result nil is allowed
 		}
 	}
 	return allErrs
 }
	/*
	Copyright 2014 The Kubernetes Authors.

	Licensed under the Apache License, Version 2.0 (the "License");
	you may not use this file except in compliance with the License.
	You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

	Unless required by applicable law or agreed to in writing, software
	distributed under the License is distributed on an "AS IS" BASIS,
	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	See the License for the specific language governing permissions and
	limitations under the License.
	*/

	package validation

	import (
	"fmt"
	"strings"

	apiequality "k8s.io/apimachinery/pkg/api/equality"
	"k8s.io/apimachinery/pkg/api/meta"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	v1validation "k8s.io/apimachinery/pkg/apis/meta/v1/validation"
	"k8s.io/apimachinery/pkg/runtime/schema"
	"k8s.io/apimachinery/pkg/util/sets"
	"k8s.io/apimachinery/pkg/util/validation"
	"k8s.io/apimachinery/pkg/util/validation/field"
	)

	const FieldImmutableErrorMsg string = `field is immutable`

	const totalAnnotationSizeLimitB int = 256 * (1 << 10) // 256 kB

	// BannedOwners is a black list of object that are not allowed to be owners.
	var BannedOwners = map[schema.GroupVersionKind]struct{}{
	{Group: "", Version: "v1", Kind: "Event"}: {},
	}

	// ValidateClusterName can be used to check whether the given cluster name is valid.
	var ValidateClusterName = NameIsDNS1035Label

	// ValidateAnnotations validates that a set of annotations are correctly defined.
	func ValidateAnnotations(annotations map[string]string, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}
	var totalSize int64
	for k, v := range annotations {
	for _, msg := range validation.IsQualifiedName(strings.ToLower(k)) {
	allErrs = append(allErrs, field.Invalid(fldPath, k, msg))
	}
	totalSize += (int64)(len(k)) + (int64)(len(v))
	}
	if totalSize > (int64)(totalAnnotationSizeLimitB) {
	allErrs = append(allErrs, field.TooLong(fldPath, "", totalAnnotationSizeLimitB))
	}
	return allErrs
	}

	func validateOwnerReference(ownerReference metav1.OwnerReference, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}
	gvk := schema.FromAPIVersionAndKind(ownerReference.APIVersion, ownerReference.Kind)
	// gvk.Group is empty for the legacy group.
	if len(gvk.Version) == 0 {
	allErrs = append(allErrs, field.Invalid(fldPath.Child("apiVersion"), ownerReference.APIVersion, "version must not be empty"))
	}
	if len(gvk.Kind) == 0 {
	allErrs = append(allErrs, field.Invalid(fldPath.Child("kind"), ownerReference.Kind, "kind must not be empty"))
	}
	if len(ownerReference.Name) == 0 {
	allErrs = append(allErrs, field.Invalid(fldPath.Child("name"), ownerReference.Name, "name must not be empty"))
	}
	if len(ownerReference.UID) == 0 {
	allErrs = append(allErrs, field.Invalid(fldPath.Child("uid"), ownerReference.UID, "uid must not be empty"))
	}
	if _, ok := BannedOwners[gvk]; ok {
	allErrs = append(allErrs, field.Invalid(fldPath, ownerReference, fmt.Sprintf("%s is disallowed from being an owner", gvk)))
	}
	return allErrs
	}

	func ValidateOwnerReferences(ownerReferences []metav1.OwnerReference, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}
	controllerName := ""
	for _, ref := range ownerReferences {
	allErrs = append(allErrs, validateOwnerReference(ref, fldPath)...)
	if ref.Controller != nil && *ref.Controller {
	if controllerName != "" {
	allErrs = append(allErrs, field.Invalid(fldPath, ownerReferences,
	fmt.Sprintf("Only one reference can have Controller set to true. Found \"true\" in references for %v and %v", controllerName, ref.Name)))
	} else {
	controllerName = ref.Name
	}
	}
	}
	return allErrs
	}

	// Validate finalizer names
	func ValidateFinalizerName(stringValue string, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}
	for _, msg := range validation.IsQualifiedName(stringValue) {
	allErrs = append(allErrs, field.Invalid(fldPath, stringValue, msg))
	}

	return allErrs
	}

	func ValidateNoNewFinalizers(newFinalizers []string, oldFinalizers []string, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}
	extra := sets.NewString(newFinalizers...).Difference(sets.NewString(oldFinalizers...))
	if len(extra) != 0 {
	allErrs = append(allErrs, field.Forbidden(fldPath, fmt.Sprintf("no new finalizers can be added if the object is being deleted, found new finalizers %#v", extra.List())))
	}
	return allErrs
	}

	func ValidateImmutableField(newVal, oldVal interface{}, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}
	if !apiequality.Semantic.DeepEqual(oldVal, newVal) {
	allErrs = append(allErrs, field.Invalid(fldPath, newVal, FieldImmutableErrorMsg))
	}
	return allErrs
	}

	// ValidateObjectMeta validates an object's metadata on creation. It expects that name generation has already
	// been performed.
	// It doesn't return an error for rootscoped resources with namespace, because namespace should already be cleared before.
	func ValidateObjectMeta(objMeta metav1.ObjectMeta, requiresNamespace bool, nameFn ValidateNameFunc, fldPath field.Path) field.ErrorList {
	metadata, err := meta.Accessor(objMeta)
	if err != nil {
	allErrs := field.ErrorList{}
	allErrs = append(allErrs, field.Invalid(fldPath, objMeta, err.Error()))
	return allErrs
	}
	return ValidateObjectMetaAccessor(metadata, requiresNamespace, nameFn, fldPath)
	}

	// ValidateObjectMeta validates an object's metadata on creation. It expects that name generation has already
	// been performed.
	// It doesn't return an error for rootscoped resources with namespace, because namespace should already be cleared before.
	func ValidateObjectMetaAccessor(meta metav1.Object, requiresNamespace bool, nameFn ValidateNameFunc, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}

	if len(meta.GetGenerateName()) != 0 {
	for _, msg := range nameFn(meta.GetGenerateName(), true) {
	allErrs = append(allErrs, field.Invalid(fldPath.Child("generateName"), meta.GetGenerateName(), msg))
	}
	}
	// If the generated name validates, but the calculated value does not, it's a problem with generation, and we
	// report it here. This may confuse users, but indicates a programming bug and still must be validated.
	// If there are multiple fields out of which one is required then add an or as a separator
	if len(meta.GetName()) == 0 {
	allErrs = append(allErrs, field.Required(fldPath.Child("name"), "name or generateName is required"))
	} else {
	for _, msg := range nameFn(meta.GetName(), false) {
	allErrs = append(allErrs, field.Invalid(fldPath.Child("name"), meta.GetName(), msg))
	}
	}
	if requiresNamespace {
	if len(meta.GetNamespace()) == 0 {
	allErrs = append(allErrs, field.Required(fldPath.Child("namespace"), ""))
	} else {
	for _, msg := range ValidateNamespaceName(meta.GetNamespace(), false) {
	allErrs = append(allErrs, field.Invalid(fldPath.Child("namespace"), meta.GetNamespace(), msg))
	}
	}
	} else {
	if len(meta.GetNamespace()) != 0 {
	allErrs = append(allErrs, field.Forbidden(fldPath.Child("namespace"), "not allowed on this type"))
	}
	}
	if len(meta.GetClusterName()) != 0 {
	for _, msg := range ValidateClusterName(meta.GetClusterName(), false) {
	allErrs = append(allErrs, field.Invalid(fldPath.Child("clusterName"), meta.GetClusterName(), msg))
	}
	}
	allErrs = append(allErrs, ValidateNonnegativeField(meta.GetGeneration(), fldPath.Child("generation"))...)
	allErrs = append(allErrs, v1validation.ValidateLabels(meta.GetLabels(), fldPath.Child("labels"))...)
	allErrs = append(allErrs, ValidateAnnotations(meta.GetAnnotations(), fldPath.Child("annotations"))...)
	allErrs = append(allErrs, ValidateOwnerReferences(meta.GetOwnerReferences(), fldPath.Child("ownerReferences"))...)
	allErrs = append(allErrs, ValidateInitializers(meta.GetInitializers(), fldPath.Child("initializers"))...)
	allErrs = append(allErrs, ValidateFinalizers(meta.GetFinalizers(), fldPath.Child("finalizers"))...)
	return allErrs
	}

	func ValidateInitializers(initializers metav1.Initializers, fldPath field.Path) field.ErrorList {
	var allErrs field.ErrorList
	if initializers == nil {
	return allErrs
	}
	for i, initializer := range initializers.Pending {
	allErrs = append(allErrs, validation.IsFullyQualifiedName(fldPath.Child("pending").Index(i).Child("name"), initializer.Name)...)
	}
	allErrs = append(allErrs, validateInitializersResult(initializers.Result, fldPath.Child("result"))...)
	return allErrs
	}

	func validateInitializersResult(result metav1.Status, fldPath field.Path) field.ErrorList {
	var allErrs field.ErrorList
	if result == nil {
	return allErrs
	}
	switch result.Status {
	case metav1.StatusFailure:
	default:
	allErrs = append(allErrs, field.Invalid(fldPath.Child("status"), result.Status, "must be 'Failure'"))
	}
	return allErrs
	}

	// ValidateFinalizers tests if the finalizers name are valid, and if there are conflicting finalizers.
	func ValidateFinalizers(finalizers []string, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}
	hasFinalizerOrphanDependents := false
	hasFinalizerDeleteDependents := false
	for _, finalizer := range finalizers {
	allErrs = append(allErrs, ValidateFinalizerName(finalizer, fldPath)...)
	if finalizer == metav1.FinalizerOrphanDependents {
	hasFinalizerOrphanDependents = true
	}
	if finalizer == metav1.FinalizerDeleteDependents {
	hasFinalizerDeleteDependents = true
	}
	}
	if hasFinalizerDeleteDependents && hasFinalizerOrphanDependents {
	allErrs = append(allErrs, field.Invalid(fldPath, finalizers, fmt.Sprintf("finalizer %s and %s cannot be both set", metav1.FinalizerOrphanDependents, metav1.FinalizerDeleteDependents)))
	}
	return allErrs
	}

	// ValidateObjectMetaUpdate validates an object's metadata when updated
	func ValidateObjectMetaUpdate(newMeta, oldMeta metav1.ObjectMeta, fldPath field.Path) field.ErrorList {
	newMetadata, err := meta.Accessor(newMeta)
	if err != nil {
	allErrs := field.ErrorList{}
	allErrs = append(allErrs, field.Invalid(fldPath, newMeta, err.Error()))
	return allErrs
	}
	oldMetadata, err := meta.Accessor(oldMeta)
	if err != nil {
	allErrs := field.ErrorList{}
	allErrs = append(allErrs, field.Invalid(fldPath, oldMeta, err.Error()))
	return allErrs
	}
	return ValidateObjectMetaAccessorUpdate(newMetadata, oldMetadata, fldPath)
	}

	func ValidateObjectMetaAccessorUpdate(newMeta, oldMeta metav1.Object, fldPath *field.Path) field.ErrorList {
	var allErrs field.ErrorList

	// Finalizers cannot be added if the object is already being deleted.
	if oldMeta.GetDeletionTimestamp() != nil {
	allErrs = append(allErrs, ValidateNoNewFinalizers(newMeta.GetFinalizers(), oldMeta.GetFinalizers(), fldPath.Child("finalizers"))...)
	}

	// Reject updates that don't specify a resource version
	if len(newMeta.GetResourceVersion()) == 0 {
	allErrs = append(allErrs, field.Invalid(fldPath.Child("resourceVersion"), newMeta.GetResourceVersion(), "must be specified for an update"))
	}

	// Generation shouldn't be decremented
	if newMeta.GetGeneration() < oldMeta.GetGeneration() {
	allErrs = append(allErrs, field.Invalid(fldPath.Child("generation"), newMeta.GetGeneration(), "must not be decremented"))
	}

	allErrs = append(allErrs, ValidateInitializersUpdate(newMeta.GetInitializers(), oldMeta.GetInitializers(), fldPath.Child("initializers"))...)

	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetName(), oldMeta.GetName(), fldPath.Child("name"))...)
	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetNamespace(), oldMeta.GetNamespace(), fldPath.Child("namespace"))...)
	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetUID(), oldMeta.GetUID(), fldPath.Child("uid"))...)
	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetCreationTimestamp(), oldMeta.GetCreationTimestamp(), fldPath.Child("creationTimestamp"))...)
	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetDeletionTimestamp(), oldMeta.GetDeletionTimestamp(), fldPath.Child("deletionTimestamp"))...)
	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetDeletionGracePeriodSeconds(), oldMeta.GetDeletionGracePeriodSeconds(), fldPath.Child("deletionGracePeriodSeconds"))...)
	allErrs = append(allErrs, ValidateImmutableField(newMeta.GetClusterName(), oldMeta.GetClusterName(), fldPath.Child("clusterName"))...)

	allErrs = append(allErrs, v1validation.ValidateLabels(newMeta.GetLabels(), fldPath.Child("labels"))...)
	allErrs = append(allErrs, ValidateAnnotations(newMeta.GetAnnotations(), fldPath.Child("annotations"))...)
	allErrs = append(allErrs, ValidateOwnerReferences(newMeta.GetOwnerReferences(), fldPath.Child("ownerReferences"))...)

	return allErrs
	}

	// ValidateInitializersUpdate checks the update of the metadata initializers field
	func ValidateInitializersUpdate(newInit, oldInit metav1.Initializers, fldPath field.Path) field.ErrorList {
	var allErrs field.ErrorList
	switch {
	case oldInit == nil && newInit != nil:
	// Initializers may not be set on new objects
	allErrs = append(allErrs, field.Invalid(fldPath, nil, "field is immutable once initialization has completed"))
	case oldInit != nil && newInit == nil:
	// this is a valid transition and means initialization was successful
	case oldInit != nil && newInit != nil:
	// validate changes to initializers
	switch {
	case oldInit.Result == nil && newInit.Result != nil:
	// setting a result is allowed
	allErrs = append(allErrs, validateInitializersResult(newInit.Result, fldPath.Child("result"))...)
	case oldInit.Result != nil:
	// setting Result implies permanent failure, and all future updates will be prevented
	allErrs = append(allErrs, ValidateImmutableField(newInit.Result, oldInit.Result, fldPath.Child("result"))...)
	default:
	// leaving the result nil is allowed
	}
	}
	return allErrs
	}