Add WarningsOnCreate,WarningsOnUpdate

pkg/registry/admissionregistration/mutatingwebhookconfiguration/strategy.go

@@ -50,6 +50,11 @@ func (mutatingWebhookConfigurationStrategy) PrepareForCreate(ctx context.Context
 	ic.Generation = 1
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (mutatingWebhookConfigurationStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // PrepareForUpdate clears fields that are not allowed to be set by end users on update.
 func (mutatingWebhookConfigurationStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
 	newIC := obj.(*admissionregistration.MutatingWebhookConfiguration)
@@ -93,6 +98,11 @@ func (mutatingWebhookConfigurationStrategy) ValidateUpdate(ctx context.Context,
 	return validation.ValidateMutatingWebhookConfigurationUpdate(obj.(*admissionregistration.MutatingWebhookConfiguration), old.(*admissionregistration.MutatingWebhookConfiguration), groupVersion)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (mutatingWebhookConfigurationStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // AllowUnconditionalUpdate is the default update policy for mutatingWebhookConfiguration objects. Status update should
 // only be allowed if version match.
 func (mutatingWebhookConfigurationStrategy) AllowUnconditionalUpdate() bool {

pkg/registry/admissionregistration/validatingwebhookconfiguration/strategy.go

@@ -73,6 +73,11 @@ func (validatingWebhookConfigurationStrategy) Validate(ctx context.Context, obj
 	return validation.ValidateValidatingWebhookConfiguration(obj.(*admissionregistration.ValidatingWebhookConfiguration), groupVersion)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (validatingWebhookConfigurationStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (validatingWebhookConfigurationStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -92,6 +97,11 @@ func (validatingWebhookConfigurationStrategy) ValidateUpdate(ctx context.Context
 	return validation.ValidateValidatingWebhookConfigurationUpdate(obj.(*admissionregistration.ValidatingWebhookConfiguration), old.(*admissionregistration.ValidatingWebhookConfiguration), groupVersion)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (validatingWebhookConfigurationStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // AllowUnconditionalUpdate is the default update policy for validatingWebhookConfiguration objects. Status update should
 // only be allowed if version match.
 func (validatingWebhookConfigurationStrategy) AllowUnconditionalUpdate() bool {

pkg/registry/apiserverinternal/storageversion/strategy.go

@@ -73,6 +73,11 @@ func (storageVersionStrategy) Validate(ctx context.Context, obj runtime.Object)
 	return validation.ValidateStorageVersion(sv)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (storageVersionStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (storageVersionStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -90,6 +95,11 @@ func (storageVersionStrategy) ValidateUpdate(ctx context.Context, obj, old runti
 	return validationErrorList
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (storageVersionStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // AllowUnconditionalUpdate is the default update policy for storageVersion objects. Status update should
 // only be allowed if version match.
 func (storageVersionStrategy) AllowUnconditionalUpdate() bool {
@@ -127,3 +137,8 @@ func (storageVersionStatusStrategy) PrepareForUpdate(ctx context.Context, obj, o
 func (storageVersionStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return validation.ValidateStorageVersionStatusUpdate(obj.(*apiserverinternal.StorageVersion), old.(*apiserverinternal.StorageVersion))
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (storageVersionStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

pkg/registry/apps/controllerrevision/strategy.go

@@ -65,6 +65,9 @@ func (strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorLis
 	return validation.ValidateControllerRevision(revision)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 func (strategy) PrepareForUpdate(ctx context.Context, newObj, oldObj runtime.Object) {
 	_ = oldObj.(*apps.ControllerRevision)
 	_ = newObj.(*apps.ControllerRevision)
@@ -78,3 +81,6 @@ func (strategy) ValidateUpdate(ctx context.Context, newObj, oldObj runtime.Objec
 	oldRevision, newRevision := oldObj.(*apps.ControllerRevision), newObj.(*apps.ControllerRevision)
 	return validation.ValidateControllerRevisionUpdate(newRevision, oldRevision)
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string { return nil }

pkg/registry/apps/daemonset/strategy.go

@@ -166,6 +166,11 @@ func (daemonSetStrategy) Validate(ctx context.Context, obj runtime.Object) field
 	return validation.ValidateDaemonSet(daemonSet, opts)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (daemonSetStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (daemonSetStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -203,6 +208,11 @@ func (daemonSetStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Ob
 	return allErrs
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (daemonSetStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // AllowUnconditionalUpdate is the default update policy for daemon set objects.
 func (daemonSetStrategy) AllowUnconditionalUpdate() bool {
 	return true
@@ -234,3 +244,8 @@ func (daemonSetStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old ru
 func (daemonSetStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return validation.ValidateDaemonSetStatusUpdate(obj.(*apps.DaemonSet), old.(*apps.DaemonSet))
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (daemonSetStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

pkg/registry/apps/deployment/strategy.go

@@ -96,6 +96,11 @@ func (deploymentStrategy) Validate(ctx context.Context, obj runtime.Object) fiel
 	return validation.ValidateDeployment(deployment, opts)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (deploymentStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (deploymentStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -149,6 +154,11 @@ func (deploymentStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.O
 	return allErrs
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (deploymentStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (deploymentStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }
@@ -183,3 +193,8 @@ func (deploymentStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old r
 func (deploymentStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return validation.ValidateDeploymentStatusUpdate(obj.(*apps.Deployment), old.(*apps.Deployment))
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (deploymentStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

pkg/registry/apps/replicaset/strategy.go

@@ -125,6 +125,9 @@ func (rsStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorL
 	return validation.ValidateReplicaSet(rs, opts)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (rsStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (rsStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -162,6 +165,9 @@ func (rsStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) f
 	return allErrs
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (rsStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string { return nil }
+
 func (rsStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }
@@ -222,3 +228,8 @@ func (rsStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.O
 func (rsStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return validation.ValidateReplicaSetStatusUpdate(obj.(*apps.ReplicaSet), old.(*apps.ReplicaSet))
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (rsStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

pkg/registry/apps/statefulset/strategy.go

@@ -113,6 +113,11 @@ func (statefulSetStrategy) Validate(ctx context.Context, obj runtime.Object) fie
 	return validation.ValidateStatefulSet(statefulSet, opts)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (statefulSetStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (statefulSetStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -133,6 +138,11 @@ func (statefulSetStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.
 	return append(validationErrorList, updateErrorList...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (statefulSetStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // AllowUnconditionalUpdate is the default update policy for StatefulSet objects.
 func (statefulSetStrategy) AllowUnconditionalUpdate() bool {
 	return true
@@ -168,3 +178,8 @@ func (statefulSetStatusStrategy) ValidateUpdate(ctx context.Context, obj, old ru
 	// TODO: Validate status updates.
 	return validation.ValidateStatefulSetStatusUpdate(obj.(*apps.StatefulSet), old.(*apps.StatefulSet))
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (statefulSetStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

pkg/registry/autoscaling/horizontalpodautoscaler/strategy.go

@@ -81,6 +81,11 @@ func (autoscalerStrategy) Validate(ctx context.Context, obj runtime.Object) fiel
 	return validation.ValidateHorizontalPodAutoscaler(autoscaler)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (autoscalerStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (autoscalerStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -123,6 +128,11 @@ func (autoscalerStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.O
 	return validation.ValidateHorizontalPodAutoscalerUpdate(obj.(*autoscaling.HorizontalPodAutoscaler), old.(*autoscaling.HorizontalPodAutoscaler))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (autoscalerStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (autoscalerStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }
@@ -162,3 +172,8 @@ func (autoscalerStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old r
 func (autoscalerStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return validation.ValidateHorizontalPodAutoscalerStatusUpdate(obj.(*autoscaling.HorizontalPodAutoscaler), old.(*autoscaling.HorizontalPodAutoscaler))
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (autoscalerStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

pkg/registry/batch/cronjob/strategy.go

@@ -102,6 +102,9 @@ func (cronJobStrategy) Validate(ctx context.Context, obj runtime.Object) field.E
 	return validation.ValidateCronJob(cronJob, opts)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (cronJobStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (cronJobStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -124,6 +127,11 @@ func (cronJobStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Obje
 	return validation.ValidateCronJobUpdate(newCronJob, oldCronJob, opts)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (cronJobStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 type cronJobStatusStrategy struct {
 	cronJobStrategy
 }
@@ -153,3 +161,8 @@ func (cronJobStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old runt
 func (cronJobStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return field.ErrorList{}
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (cronJobStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

pkg/registry/batch/job/strategy.go

@@ -142,6 +142,9 @@ func (jobStrategy) Validate(ctx context.Context, obj runtime.Object) field.Error
 	return validation.ValidateJob(job, opts)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (jobStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // generateSelector adds a selector to a job and labels to its template
 // which can be used to uniquely identify the pods created by that job,
 // if the user has requested this behavior.
@@ -216,6 +219,11 @@ func (jobStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object)
 	return append(validationErrorList, updateErrorList...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (jobStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 type jobStatusStrategy struct {
 	jobStrategy
 }
@@ -242,6 +250,11 @@ func (jobStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Ob
 	return validation.ValidateJobUpdateStatus(obj.(*batch.Job), old.(*batch.Job))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (jobStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // JobSelectableFields returns a field set that represents the object for matching purposes.
 func JobToSelectableFields(job *batch.Job) fields.Set {
 	objectMetaFieldsSet := generic.ObjectMetaFieldsSet(&job.ObjectMeta, true)

pkg/registry/certificates/certificates/strategy.go

@@ -117,6 +117,9 @@ func (csrStrategy) Validate(ctx context.Context, obj runtime.Object) field.Error
 	return validation.ValidateCertificateSigningRequestCreate(csr, requestGroupVersion(ctx))
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (csrStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation (which includes a signature check).
 func (csrStrategy) Canonicalize(obj runtime.Object) {}
 
@@ -127,6 +130,11 @@ func (csrStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object)
 	return validation.ValidateCertificateSigningRequestUpdate(newCSR, oldCSR, requestGroupVersion(ctx))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (csrStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // If AllowUnconditionalUpdate() is true and the object specified by
 // the user does not have a resource version, then generic Update()
 // populates it with the latest version. Else, it checks that the
@@ -244,6 +252,11 @@ func (csrStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Ob
 	return validation.ValidateCertificateSigningRequestStatusUpdate(obj.(*certificates.CertificateSigningRequest), old.(*certificates.CertificateSigningRequest), requestGroupVersion(ctx))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (csrStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (csrStatusStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -291,6 +304,11 @@ func (csrApprovalStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.
 	return validation.ValidateCertificateSigningRequestApprovalUpdate(obj.(*certificates.CertificateSigningRequest), old.(*certificates.CertificateSigningRequest), requestGroupVersion(ctx))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (csrApprovalStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // GetAttrs returns labels and fields of a given object for filtering purposes.
 func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
 	csr, ok := obj.(*certificates.CertificateSigningRequest)

pkg/registry/coordination/lease/strategy.go

@@ -55,6 +55,9 @@ func (leaseStrategy) Validate(ctx context.Context, obj runtime.Object) field.Err
 	return validation.ValidateLease(lease)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (leaseStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (leaseStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -69,6 +72,11 @@ func (leaseStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object
 	return validation.ValidateLeaseUpdate(obj.(*coordination.Lease), old.(*coordination.Lease))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (leaseStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // AllowUnconditionalUpdate is the default update policy for Lease objects.
 func (leaseStrategy) AllowUnconditionalUpdate() bool {
 	return false

pkg/registry/core/configmap/strategy.go

@@ -64,6 +64,9 @@ func (strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorLis
 	return validation.ValidateConfigMap(cfg)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (strategy) Canonicalize(obj runtime.Object) {
 }
@@ -84,6 +87,9 @@ func (strategy) ValidateUpdate(ctx context.Context, newObj, oldObj runtime.Objec
 	return validation.ValidateConfigMapUpdate(newCfg, oldCfg)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string { return nil }
+
 func dropDisabledFields(configMap *api.ConfigMap, oldConfigMap *api.ConfigMap) {
 }
 

pkg/registry/core/endpoint/strategy.go

@@ -55,6 +55,11 @@ func (endpointsStrategy) Validate(ctx context.Context, obj runtime.Object) field
 	return validation.ValidateEndpointsCreate(obj.(*api.Endpoints))
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (endpointsStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (endpointsStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -69,6 +74,11 @@ func (endpointsStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Ob
 	return validation.ValidateEndpointsUpdate(obj.(*api.Endpoints), old.(*api.Endpoints))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (endpointsStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (endpointsStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }

pkg/registry/core/event/strategy.go

@@ -64,6 +64,9 @@ func (eventStrategy) Validate(ctx context.Context, obj runtime.Object) field.Err
 	return validation.ValidateEventCreate(event, groupVersion)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (eventStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (eventStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -79,6 +82,11 @@ func (eventStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object
 	return validation.ValidateEventUpdate(event, oldEvent, groupVersion)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (eventStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (eventStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }

pkg/registry/core/limitrange/strategy.go

@@ -56,6 +56,11 @@ func (limitrangeStrategy) Validate(ctx context.Context, obj runtime.Object) fiel
 	return validation.ValidateLimitRange(limitRange)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (limitrangeStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (limitrangeStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -69,6 +74,11 @@ func (limitrangeStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.O
 	return validation.ValidateLimitRange(limitRange)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (limitrangeStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (limitrangeStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }

pkg/registry/core/namespace/strategy.go

@@ -100,6 +100,11 @@ func (namespaceStrategy) Validate(ctx context.Context, obj runtime.Object) field
 	return validation.ValidateNamespace(namespace)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (namespaceStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (namespaceStrategy) Canonicalize(obj runtime.Object) {
 	// Ensure the label matches the name for namespaces just created using GenerateName,
@@ -139,6 +144,11 @@ func (namespaceStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Ob
 	return append(errorList, validation.ValidateNamespaceUpdate(obj.(*api.Namespace), old.(*api.Namespace))...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (namespaceStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (namespaceStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }
@@ -169,6 +179,11 @@ func (namespaceStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runt
 	return validation.ValidateNamespaceStatusUpdate(obj.(*api.Namespace), old.(*api.Namespace))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (namespaceStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 type namespaceFinalizeStrategy struct {
 	namespaceStrategy
 }
@@ -179,6 +194,11 @@ func (namespaceFinalizeStrategy) ValidateUpdate(ctx context.Context, obj, old ru
 	return validation.ValidateNamespaceFinalizeUpdate(obj.(*api.Namespace), old.(*api.Namespace))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (namespaceFinalizeStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // GetResetFields returns the set of fields that get reset by the strategy
 // and should not be modified by the user.
 func (namespaceFinalizeStrategy) GetResetFields() map[fieldpath.APIVersion]*fieldpath.Set {

pkg/registry/core/node/strategy.go

@@ -140,6 +140,9 @@ func (nodeStrategy) Validate(ctx context.Context, obj runtime.Object) field.Erro
 	return validation.ValidateNode(node)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (nodeStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (nodeStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -150,6 +153,11 @@ func (nodeStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object)
 	return append(errorList, validation.ValidateNodeUpdate(obj.(*api.Node), old.(*api.Node))...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (nodeStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (nodeStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }
@@ -197,6 +205,11 @@ func (nodeStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.O
 	return validation.ValidateNodeUpdate(obj.(*api.Node), old.(*api.Node))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (nodeStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (nodeStatusStrategy) Canonicalize(obj runtime.Object) {
 }

pkg/registry/core/persistentvolume/strategy.go

@@ -75,6 +75,11 @@ func (persistentvolumeStrategy) Validate(ctx context.Context, obj runtime.Object
 	return append(errorList, volumevalidation.ValidatePersistentVolume(persistentvolume)...)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (persistentvolumeStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (persistentvolumeStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -99,6 +104,11 @@ func (persistentvolumeStrategy) ValidateUpdate(ctx context.Context, obj, old run
 	return append(errorList, validation.ValidatePersistentVolumeUpdate(newPv, old.(*api.PersistentVolume))...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (persistentvolumeStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (persistentvolumeStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }
@@ -132,6 +142,11 @@ func (persistentvolumeStatusStrategy) ValidateUpdate(ctx context.Context, obj, o
 	return validation.ValidatePersistentVolumeStatusUpdate(obj.(*api.PersistentVolume), old.(*api.PersistentVolume))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (persistentvolumeStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // GetAttrs returns labels and fields of a given object for filtering purposes.
 func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
 	persistentvolumeObj, ok := obj.(*api.PersistentVolume)

pkg/registry/core/persistentvolumeclaim/strategy.go

@@ -75,6 +75,11 @@ func (persistentvolumeclaimStrategy) Validate(ctx context.Context, obj runtime.O
 	return validation.ValidatePersistentVolumeClaim(pvc)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (persistentvolumeclaimStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (persistentvolumeclaimStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -97,6 +102,11 @@ func (persistentvolumeclaimStrategy) ValidateUpdate(ctx context.Context, obj, ol
 	return append(errorList, validation.ValidatePersistentVolumeClaimUpdate(obj.(*api.PersistentVolumeClaim), old.(*api.PersistentVolumeClaim))...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (persistentvolumeclaimStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (persistentvolumeclaimStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }
@@ -133,6 +143,11 @@ func (persistentvolumeclaimStatusStrategy) ValidateUpdate(ctx context.Context, o
 	return validation.ValidatePersistentVolumeClaimStatusUpdate(obj.(*api.PersistentVolumeClaim), old.(*api.PersistentVolumeClaim))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (persistentvolumeclaimStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // GetAttrs returns labels and fields of a given object for filtering purposes.
 func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
 	persistentvolumeclaimObj, ok := obj.(*api.PersistentVolumeClaim)

pkg/registry/core/pod/strategy.go

@@ -107,6 +107,9 @@ func (podStrategy) Validate(ctx context.Context, obj runtime.Object) field.Error
 	return validation.ValidatePodCreate(pod, opts)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (podStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (podStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -125,6 +128,11 @@ func (podStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object)
 	return validation.ValidatePodUpdate(obj.(*api.Pod), old.(*api.Pod), opts)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (podStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // AllowUnconditionalUpdate allows pods to be overwritten
 func (podStrategy) AllowUnconditionalUpdate() bool {
 	return true
@@ -198,6 +206,11 @@ func (podStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Ob
 	return validation.ValidatePodStatusUpdate(obj.(*api.Pod), old.(*api.Pod), opts)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (podStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 type podEphemeralContainersStrategy struct {
 	podStrategy
 }
@@ -231,6 +244,11 @@ func (podEphemeralContainersStrategy) ValidateUpdate(ctx context.Context, obj, o
 	return validation.ValidatePodEphemeralContainersUpdate(newPod, oldPod, opts)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (podEphemeralContainersStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // GetAttrs returns labels and fields of a given object for filtering purposes.
 func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
 	pod, ok := obj.(*api.Pod)

pkg/registry/core/podtemplate/strategy.go

@@ -57,6 +57,11 @@ func (podTemplateStrategy) Validate(ctx context.Context, obj runtime.Object) fie
 	return corevalidation.ValidatePodTemplate(template, opts)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (podTemplateStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (podTemplateStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -84,6 +89,11 @@ func (podTemplateStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.
 	return corevalidation.ValidatePodTemplateUpdate(template, oldTemplate, opts)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (podTemplateStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (podTemplateStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }

pkg/registry/core/replicationcontroller/strategy.go

@@ -125,6 +125,9 @@ func (rcStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorL
 	return validation.ValidateReplicationController(controller, opts)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (rcStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (rcStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -165,6 +168,11 @@ func (rcStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) f
 	return errs
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (rcStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (rcStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }
@@ -225,3 +233,8 @@ func (rcStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.O
 func (rcStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return validation.ValidateReplicationControllerStatusUpdate(obj.(*api.ReplicationController), old.(*api.ReplicationController))
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (rcStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

pkg/registry/core/resourcequota/strategy.go

@@ -77,6 +77,11 @@ func (resourcequotaStrategy) Validate(ctx context.Context, obj runtime.Object) f
 	return validation.ValidateResourceQuota(resourcequota, opts)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (resourcequotaStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (resourcequotaStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -93,6 +98,11 @@ func (resourcequotaStrategy) ValidateUpdate(ctx context.Context, obj, old runtim
 	return validation.ValidateResourceQuotaUpdate(newObj, oldObj, opts)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (resourcequotaStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (resourcequotaStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }
@@ -126,6 +136,11 @@ func (resourcequotaStatusStrategy) ValidateUpdate(ctx context.Context, obj, old
 	return validation.ValidateResourceQuotaStatusUpdate(obj.(*api.ResourceQuota), old.(*api.ResourceQuota))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (resourcequotaStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func getValidationOptionsFromResourceQuota(newObj *api.ResourceQuota, oldObj *api.ResourceQuota) validation.ResourceQuotaValidationOptions {
 	opts := validation.ResourceQuotaValidationOptions{
 		AllowPodAffinityNamespaceSelector: utilfeature.DefaultFeatureGate.Enabled(features.PodAffinityNamespaceSelector),

pkg/registry/core/secret/strategy.go

@@ -60,6 +60,9 @@ func (strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorLis
 	return validation.ValidateSecret(obj.(*api.Secret))
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 func (strategy) Canonicalize(obj runtime.Object) {
 }
 
@@ -83,6 +86,11 @@ func (strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) fie
 	return validation.ValidateSecretUpdate(obj.(*api.Secret), old.(*api.Secret))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func dropDisabledFields(secret *api.Secret, oldSecret *api.Secret) {
 }
 

pkg/registry/core/service/strategy.go

@@ -133,6 +133,9 @@ func (strategy svcStrategy) Validate(ctx context.Context, obj runtime.Object) fi
 	return allErrs
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (svcStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (svcStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -147,6 +150,11 @@ func (strategy svcStrategy) ValidateUpdate(ctx context.Context, obj, old runtime
 	return allErrs
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (svcStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (svcStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }
@@ -302,6 +310,11 @@ func (serviceStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtim
 	return validation.ValidateServiceStatusUpdate(obj.(*api.Service), old.(*api.Service))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (serviceStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // NormalizeClusterIPs adjust clusterIPs based on ClusterIP.  This must not
 // consider any other fields.
 func NormalizeClusterIPs(oldSvc, newSvc *api.Service) {

pkg/registry/core/serviceaccount/strategy.go

@@ -49,6 +49,9 @@ func (strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorLis
 	return validation.ValidateServiceAccount(obj.(*api.ServiceAccount))
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (strategy) Canonicalize(obj runtime.Object) {
 }
@@ -71,6 +74,11 @@ func (strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) fie
 	return validation.ValidateServiceAccountUpdate(obj.(*api.ServiceAccount), old.(*api.ServiceAccount))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (strategy) AllowUnconditionalUpdate() bool {
 	return true
 }

pkg/registry/discovery/endpointslice/strategy.go

@@ -87,6 +87,11 @@ func (endpointSliceStrategy) Validate(ctx context.Context, obj runtime.Object) f
 	return err
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (endpointSliceStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (endpointSliceStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -103,6 +108,11 @@ func (endpointSliceStrategy) ValidateUpdate(ctx context.Context, new, old runtim
 	return validation.ValidateEndpointSliceUpdate(newEPS, oldEPS)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (endpointSliceStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // AllowUnconditionalUpdate is the default update policy for EndpointSlice objects.
 func (endpointSliceStrategy) AllowUnconditionalUpdate() bool {
 	return true

pkg/registry/flowcontrol/flowschema/strategy.go

@@ -82,6 +82,11 @@ func (flowSchemaStrategy) Validate(ctx context.Context, obj runtime.Object) fiel
 	return validation.ValidateFlowSchema(obj.(*flowcontrol.FlowSchema))
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (flowSchemaStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (flowSchemaStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -100,6 +105,11 @@ func (flowSchemaStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.O
 	return validation.ValidateFlowSchemaUpdate(old.(*flowcontrol.FlowSchema), obj.(*flowcontrol.FlowSchema))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (flowSchemaStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 type flowSchemaStatusStrategy struct {
 	flowSchemaStrategy
 }
@@ -139,3 +149,8 @@ func (flowSchemaStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old r
 func (flowSchemaStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return validation.ValidateFlowSchemaStatusUpdate(old.(*flowcontrol.FlowSchema), obj.(*flowcontrol.FlowSchema))
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (flowSchemaStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

pkg/registry/flowcontrol/prioritylevelconfiguration/strategy.go

@@ -82,6 +82,11 @@ func (priorityLevelConfigurationStrategy) Validate(ctx context.Context, obj runt
 	return validation.ValidatePriorityLevelConfiguration(obj.(*flowcontrol.PriorityLevelConfiguration))
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (priorityLevelConfigurationStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (priorityLevelConfigurationStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -100,6 +105,11 @@ func (priorityLevelConfigurationStrategy) ValidateUpdate(ctx context.Context, ob
 	return validation.ValidatePriorityLevelConfiguration(obj.(*flowcontrol.PriorityLevelConfiguration))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (priorityLevelConfigurationStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 type priorityLevelConfigurationStatusStrategy struct {
 	priorityLevelConfigurationStrategy
 }
@@ -139,3 +149,8 @@ func (priorityLevelConfigurationStatusStrategy) PrepareForUpdate(ctx context.Con
 func (priorityLevelConfigurationStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return validation.ValidatePriorityLevelConfigurationStatusUpdate(old.(*flowcontrol.PriorityLevelConfiguration), obj.(*flowcontrol.PriorityLevelConfiguration))
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (priorityLevelConfigurationStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

pkg/registry/networking/ingress/strategy.go

@@ -98,6 +98,9 @@ func (ingressStrategy) Validate(ctx context.Context, obj runtime.Object) field.E
 	return validation.ValidateIngressCreate(ingress, requestGV)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (ingressStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (ingressStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -116,6 +119,11 @@ func (ingressStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Obje
 	return validation.ValidateIngressUpdate(obj.(*networking.Ingress), old.(*networking.Ingress), requestGV)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (ingressStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // AllowUnconditionalUpdate is the default update policy for Ingress objects.
 func (ingressStrategy) AllowUnconditionalUpdate() bool {
 	return true
@@ -158,3 +166,8 @@ func (ingressStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old runt
 func (ingressStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return validation.ValidateIngressStatusUpdate(obj.(*networking.Ingress), old.(*networking.Ingress))
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (ingressStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

pkg/registry/networking/ingressclass/strategy.go

@@ -80,6 +80,11 @@ func (ingressClassStrategy) Validate(ctx context.Context, obj runtime.Object) fi
 	return validation.ValidateIngressClass(ingressClass)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (ingressClassStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (ingressClassStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -98,6 +103,11 @@ func (ingressClassStrategy) ValidateUpdate(ctx context.Context, obj, old runtime
 	return validation.ValidateIngressClassUpdate(newIngressClass, oldIngressClass)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (ingressClassStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // AllowUnconditionalUpdate is the default update policy for IngressClass
 // objects.
 func (ingressClassStrategy) AllowUnconditionalUpdate() bool {

pkg/registry/networking/networkpolicy/strategy.go

@@ -77,6 +77,11 @@ func (networkPolicyStrategy) Validate(ctx context.Context, obj runtime.Object) f
 	return validation.ValidateNetworkPolicy(networkPolicy)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (networkPolicyStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (networkPolicyStrategy) Canonicalize(obj runtime.Object) {}
 
@@ -92,6 +97,11 @@ func (networkPolicyStrategy) ValidateUpdate(ctx context.Context, obj, old runtim
 	return append(validationErrorList, updateErrorList...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (networkPolicyStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // AllowUnconditionalUpdate is the default update policy for NetworkPolicy objects.
 func (networkPolicyStrategy) AllowUnconditionalUpdate() bool {
 	return true

pkg/registry/node/runtimeclass/strategy.go

@@ -80,6 +80,9 @@ func (strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorLis
 	return validation.ValidateRuntimeClass(runtimeClass)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (strategy) Canonicalize(obj runtime.Object) {
 	_ = obj.(*node.RuntimeClass)
@@ -92,6 +95,11 @@ func (strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) fie
 	return append(errorList, validation.ValidateRuntimeClassUpdate(newObj, old.(*node.RuntimeClass))...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // If AllowUnconditionalUpdate() is true and the object specified by
 // the user does not have a resource version, then generic Update()
 // populates it with the latest version. Else, it checks that the

pkg/registry/policy/poddisruptionbudget/strategy.go

@@ -90,6 +90,11 @@ func (podDisruptionBudgetStrategy) Validate(ctx context.Context, obj runtime.Obj
 	return validation.ValidatePodDisruptionBudget(podDisruptionBudget)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (podDisruptionBudgetStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (podDisruptionBudgetStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -104,6 +109,11 @@ func (podDisruptionBudgetStrategy) ValidateUpdate(ctx context.Context, obj, old
 	return validation.ValidatePodDisruptionBudget(obj.(*policy.PodDisruptionBudget))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (podDisruptionBudgetStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // AllowUnconditionalUpdate is the default update policy for PodDisruptionBudget objects. Status update should
 // only be allowed if version match.
 func (podDisruptionBudgetStrategy) AllowUnconditionalUpdate() bool {
@@ -152,3 +162,8 @@ func (podDisruptionBudgetStatusStrategy) ValidateUpdate(ctx context.Context, obj
 	return validation.ValidatePodDisruptionBudgetStatusUpdate(obj.(*policy.PodDisruptionBudget).Status,
 		old.(*policy.PodDisruptionBudget).Status, field.NewPath("status"), apiVersion)
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (podDisruptionBudgetStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

pkg/registry/policy/podsecuritypolicy/strategy.go

@@ -81,6 +81,9 @@ func (strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorLis
 	return validation.ValidatePodSecurityPolicy(obj.(*policy.PodSecurityPolicy), opts)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 func (strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	opts := validation.PodSecurityPolicyValidationOptions{
 		// Allowed if the feature is enabled or the old policy already had it.
@@ -91,6 +94,11 @@ func (strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) fie
 	return validation.ValidatePodSecurityPolicyUpdate(old.(*policy.PodSecurityPolicy), obj.(*policy.PodSecurityPolicy), opts)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func volumeInUse(oldPSP *policy.PodSecurityPolicy, volume policy.FSType) bool {
 	if oldPSP == nil {
 		return false

pkg/registry/rbac/clusterrole/strategy.go

@@ -74,6 +74,9 @@ func (strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorLis
 	return validation.ValidateClusterRole(clusterRole)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (strategy) Canonicalize(obj runtime.Object) {
 	_ = obj.(*rbac.ClusterRole)
@@ -86,6 +89,11 @@ func (strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) fie
 	return append(errorList, validation.ValidateClusterRoleUpdate(newObj, old.(*rbac.ClusterRole))...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // If AllowUnconditionalUpdate() is true and the object specified by
 // the user does not have a resource version, then generic Update()
 // populates it with the latest version. Else, it checks that the

pkg/registry/rbac/clusterrolebinding/strategy.go

@@ -74,6 +74,9 @@ func (strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorLis
 	return validation.ValidateClusterRoleBinding(clusterRoleBinding)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (strategy) Canonicalize(obj runtime.Object) {
 	_ = obj.(*rbac.ClusterRoleBinding)
@@ -86,6 +89,11 @@ func (strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) fie
 	return append(errorList, validation.ValidateClusterRoleBindingUpdate(newObj, old.(*rbac.ClusterRoleBinding))...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // If AllowUnconditionalUpdate() is true and the object specified by
 // the user does not have a resource version, then generic Update()
 // populates it with the latest version. Else, it checks that the

pkg/registry/rbac/role/strategy.go

@@ -74,6 +74,9 @@ func (strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorLis
 	return validation.ValidateRole(role)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (strategy) Canonicalize(obj runtime.Object) {
 	_ = obj.(*rbac.Role)
@@ -86,6 +89,11 @@ func (strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) fie
 	return append(errorList, validation.ValidateRoleUpdate(newObj, old.(*rbac.Role))...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // If AllowUnconditionalUpdate() is true and the object specified by
 // the user does not have a resource version, then generic Update()
 // populates it with the latest version. Else, it checks that the

pkg/registry/rbac/rolebinding/strategy.go

@@ -74,6 +74,9 @@ func (strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorLis
 	return validation.ValidateRoleBinding(roleBinding)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (strategy) Canonicalize(obj runtime.Object) {
 	_ = obj.(*rbac.RoleBinding)
@@ -86,6 +89,11 @@ func (strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) fie
 	return append(errorList, validation.ValidateRoleBindingUpdate(newObj, old.(*rbac.RoleBinding))...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // If AllowUnconditionalUpdate() is true and the object specified by
 // the user does not have a resource version, then generic Update()
 // populates it with the latest version. Else, it checks that the

pkg/registry/scheduling/priorityclass/strategy.go

@@ -63,6 +63,11 @@ func (priorityClassStrategy) Validate(ctx context.Context, obj runtime.Object) f
 	return validation.ValidatePriorityClass(pc)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (priorityClassStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (priorityClassStrategy) Canonicalize(obj runtime.Object) {}
 
@@ -76,6 +81,11 @@ func (priorityClassStrategy) ValidateUpdate(ctx context.Context, obj, old runtim
 	return validation.ValidatePriorityClassUpdate(obj.(*scheduling.PriorityClass), old.(*scheduling.PriorityClass))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (priorityClassStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // AllowUnconditionalUpdate is the default update policy for PriorityClass objects.
 func (priorityClassStrategy) AllowUnconditionalUpdate() bool {
 	return true

pkg/registry/storage/csidriver/strategy.go

@@ -68,6 +68,11 @@ func (csiDriverStrategy) Validate(ctx context.Context, obj runtime.Object) field
 	return validation.ValidateCSIDriver(csiDriver)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (csiDriverStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (csiDriverStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -116,6 +121,11 @@ func (csiDriverStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Ob
 	return validation.ValidateCSIDriverUpdate(newCSIDriverObj, oldCSIDriverObj)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (csiDriverStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (csiDriverStrategy) AllowUnconditionalUpdate() bool {
 	return false
 }

pkg/registry/storage/csinode/strategy.go

@@ -59,6 +59,9 @@ func (csiNodeStrategy) Validate(ctx context.Context, obj runtime.Object) field.E
 	return errs
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (csiNodeStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // Canonicalize normalizes the object after validation.
 func (csiNodeStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -90,6 +93,11 @@ func (csiNodeStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Obje
 	return append(errorList, validation.ValidateCSINodeUpdate(newCSINodeObj, oldCSINodeObj, validateOptions)...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (csiNodeStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (csiNodeStrategy) AllowUnconditionalUpdate() bool {
 	return false
 }

pkg/registry/storage/csistoragecapacity/strategy.go

@@ -54,6 +54,11 @@ func (csiStorageCapacityStrategy) Validate(ctx context.Context, obj runtime.Obje
 	return errs
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (csiStorageCapacityStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (csiStorageCapacityStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -73,6 +78,11 @@ func (csiStorageCapacityStrategy) ValidateUpdate(ctx context.Context, obj, old r
 	return append(errorList, validation.ValidateCSIStorageCapacityUpdate(newCSIStorageCapacityObj, oldCSIStorageCapacityObj)...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (csiStorageCapacityStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (csiStorageCapacityStrategy) AllowUnconditionalUpdate() bool {
 	return false
 }

pkg/registry/storage/storageclass/strategy.go

@@ -54,6 +54,11 @@ func (storageClassStrategy) Validate(ctx context.Context, obj runtime.Object) fi
 	return validation.ValidateStorageClass(storageClass)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (storageClassStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (storageClassStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -75,6 +80,11 @@ func (storageClassStrategy) ValidateUpdate(ctx context.Context, obj, old runtime
 	return append(errorList, validation.ValidateStorageClassUpdate(obj.(*storage.StorageClass), old.(*storage.StorageClass))...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (storageClassStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (storageClassStrategy) AllowUnconditionalUpdate() bool {
 	return true
 }

pkg/registry/storage/volumeattachment/strategy.go

@@ -104,6 +104,11 @@ func (volumeAttachmentStrategy) Validate(ctx context.Context, obj runtime.Object
 	return errs
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (volumeAttachmentStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (volumeAttachmentStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -143,6 +148,11 @@ func (volumeAttachmentStrategy) ValidateUpdate(ctx context.Context, obj, old run
 	return append(errorList, validation.ValidateVolumeAttachmentUpdate(newVolumeAttachmentObj, oldVolumeAttachmentObj)...)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (volumeAttachmentStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (volumeAttachmentStrategy) AllowUnconditionalUpdate() bool {
 	return false
 }

staging/src/k8s.io/apiextensions-apiserver/pkg/registry/customresource/status_strategy.go

@@ -83,3 +83,8 @@ func (a statusStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.O
 func (a statusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return a.customResourceStrategy.validator.ValidateStatusUpdate(ctx, obj, old, a.scale)
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (statusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

staging/src/k8s.io/apiextensions-apiserver/pkg/registry/customresource/strategy.go

@@ -161,6 +161,11 @@ func (a customResourceStrategy) Validate(ctx context.Context, obj runtime.Object
 	return errs
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (customResourceStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 // Canonicalize normalizes the object after validation.
 func (customResourceStrategy) Canonicalize(obj runtime.Object) {
 }
@@ -202,6 +207,11 @@ func (a customResourceStrategy) ValidateUpdate(ctx context.Context, obj, old run
 	return errs
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (customResourceStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // GetAttrs returns labels and fields of a given object for filtering purposes.
 func (a customResourceStrategy) GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
 	accessor, err := meta.Accessor(obj)

staging/src/k8s.io/apiextensions-apiserver/pkg/registry/customresource/validator.go

@@ -93,6 +93,11 @@ func (a customResourceValidator) ValidateUpdate(ctx context.Context, obj, old ru
 	return allErrs
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (customResourceValidator) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 func (a customResourceValidator) ValidateStatusUpdate(ctx context.Context, obj, old runtime.Object, scale *apiextensions.CustomResourceSubresourceScale) field.ErrorList {
 	u, ok := obj.(*unstructured.Unstructured)
 	if !ok {

staging/src/k8s.io/apiextensions-apiserver/pkg/registry/customresourcedefinition/strategy.go

@@ -119,6 +119,9 @@ func (strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorLis
 	return validation.ValidateCustomResourceDefinition(obj.(*apiextensions.CustomResourceDefinition), groupVersion)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 // AllowCreateOnUpdate is false for CustomResourceDefinition; this means a POST is
 // needed to create one.
 func (strategy) AllowCreateOnUpdate() bool {
@@ -144,6 +147,11 @@ func (strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) fie
 	return validation.ValidateCustomResourceDefinitionUpdate(obj.(*apiextensions.CustomResourceDefinition), old.(*apiextensions.CustomResourceDefinition), groupVersion)
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 type statusStrategy struct {
 	runtime.ObjectTyper
 	names.NameGenerator
@@ -198,6 +206,11 @@ func (statusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Objec
 	return validation.ValidateUpdateCustomResourceDefinitionStatus(obj.(*apiextensions.CustomResourceDefinition), old.(*apiextensions.CustomResourceDefinition))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (statusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // GetAttrs returns labels and fields of a given object for filtering purposes.
 func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
 	apiserver, ok := obj.(*apiextensions.CustomResourceDefinition)

staging/src/k8s.io/apiserver/pkg/registry/generic/registry/store_test.go

@@ -115,9 +115,15 @@ func (t *testRESTStrategy) PrepareForUpdate(ctx context.Context, obj, old runtim
 func (t *testRESTStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
 	return nil
 }
+func (t *testRESTStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
 func (t *testRESTStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return nil
 }
+func (t *testRESTStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
 func (t *testRESTStrategy) Canonicalize(obj runtime.Object) {}
 
 func NewTestGenericStoreRegistry(t *testing.T) (factory.DestroyFunc, *Store) {

staging/src/k8s.io/apiserver/pkg/registry/rest/create.go

@@ -31,6 +31,7 @@ import (
 	"k8s.io/apiserver/pkg/features"
 	"k8s.io/apiserver/pkg/storage/names"
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	"k8s.io/apiserver/pkg/warning"
 )
 
 // RESTCreateStrategy defines the minimum validation, accepted input, and
@@ -59,6 +60,26 @@ type RESTCreateStrategy interface {
 	// before the object is persisted.  This method should not mutate the
 	// object.
 	Validate(ctx context.Context, obj runtime.Object) field.ErrorList
+	// WarningsOnCreate returns warnings to the client performing a create.
+	// WarningsOnCreate is invoked after default fields in the object have been filled in
+	// and after Validate has passed, before Canonicalize is called, and the object is persisted.
+	// This method must not mutate the object.
+	//
+	// Be brief; limit warnings to 120 characters if possible.
+	// Don't include a "Warning:" prefix in the message (that is added by clients on output).
+	// Warnings returned about a specific field should be formatted as "path.to.field: message".
+	// For example: `spec.imagePullSecrets[0].name: invalid empty name ""`
+	//
+	// Use warning messages to describe problems the client making the API request should correct or be aware of.
+	// For example:
+	// - use of deprecated fields/labels/annotations that will stop working in a future release
+	// - use of obsolete fields/labels/annotations that are non-functional
+	// - malformed or invalid specifications that prevent successful handling of the submitted object,
+	//   but are not rejected by validation for compatibility reasons
+	//
+	// Warnings should not be returned for fields which cannot be resolved by the caller.
+	// For example, do not warn about spec fields in a subresource creation request.
+	WarningsOnCreate(ctx context.Context, obj runtime.Object) []string
 	// Canonicalize allows an object to be mutated into a canonical form. This
 	// ensures that code that operates on these objects can rely on the common
 	// form for things like comparison.  Canonicalize is invoked after
@@ -113,6 +134,10 @@ func BeforeCreate(strategy RESTCreateStrategy, ctx context.Context, obj runtime.
 		return errors.NewInvalid(kind.GroupKind(), objectMeta.GetName(), errs)
 	}
 
+	for _, w := range strategy.WarningsOnCreate(ctx, obj) {
+		warning.AddWarning(ctx, "", w)
+	}
+
 	strategy.Canonicalize(obj)
 
 	return nil

staging/src/k8s.io/apiserver/pkg/registry/rest/create_update.go

@@ -39,6 +39,26 @@ type RESTCreateUpdateStrategy interface {
 	// filled in before the object is persisted.  This method should not mutate
 	// the object.
 	ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList
+	// WarningsOnUpdate returns warnings to the client performing the update.
+	// WarningsOnUpdate is invoked after default fields in the object have been filled in
+	// and after ValidateUpdate has passed, before Canonicalize is called, and before the object is persisted.
+	// This method must not mutate either object.
+	//
+	// Be brief; limit warnings to 120 characters if possible.
+	// Don't include a "Warning:" prefix in the message (that is added by clients on output).
+	// Warnings returned about a specific field should be formatted as "path.to.field: message".
+	// For example: `spec.imagePullSecrets[0].name: invalid empty name ""`
+	//
+	// Use warning messages to describe problems the client making the API request should correct or be aware of.
+	// For example:
+	// - use of deprecated fields/labels/annotations that will stop working in a future release
+	// - use of obsolete fields/labels/annotations that are non-functional
+	// - malformed or invalid specifications that prevent successful handling of the submitted object,
+	//   but are not rejected by validation for compatibility reasons
+	//
+	// Warnings should not be returned for fields which cannot be resolved by the caller.
+	// For example, do not warn about spec fields in a status update.
+	WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string
 	// AllowUnconditionalUpdate returns true if the object can be updated
 	// unconditionally (irrespective of the latest resource version), when
 	// there is no resource version specified in the object.

staging/src/k8s.io/apiserver/pkg/registry/rest/update.go

@@ -30,6 +30,7 @@ import (
 	"k8s.io/apiserver/pkg/admission"
 	"k8s.io/apiserver/pkg/features"
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	"k8s.io/apiserver/pkg/warning"
 )
 
 // RESTUpdateStrategy defines the minimum validation, accepted input, and
@@ -51,6 +52,26 @@ type RESTUpdateStrategy interface {
 	// filled in before the object is persisted.  This method should not mutate
 	// the object.
 	ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList
+	// WarningsOnUpdate returns warnings to the client performing the update.
+	// WarningsOnUpdate is invoked after default fields in the object have been filled in
+	// and after ValidateUpdate has passed, before Canonicalize is called, and before the object is persisted.
+	// This method must not mutate either object.
+	//
+	// Be brief; limit warnings to 120 characters if possible.
+	// Don't include a "Warning:" prefix in the message (that is added by clients on output).
+	// Warnings returned about a specific field should be formatted as "path.to.field: message".
+	// For example: `spec.imagePullSecrets[0].name: invalid empty name ""`
+	//
+	// Use warning messages to describe problems the client making the API request should correct or be aware of.
+	// For example:
+	// - use of deprecated fields/labels/annotations that will stop working in a future release
+	// - use of obsolete fields/labels/annotations that are non-functional
+	// - malformed or invalid specifications that prevent successful handling of the submitted object,
+	//   but are not rejected by validation for compatibility reasons
+	//
+	// Warnings should not be returned for fields which cannot be resolved by the caller.
+	// For example, do not warn about spec fields in a status update.
+	WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string
 	// Canonicalize allows an object to be mutated into a canonical form. This
 	// ensures that code that operates on these objects can rely on the common
 	// form for things like comparison.  Canonicalize is invoked after
@@ -144,6 +165,10 @@ func BeforeUpdate(strategy RESTUpdateStrategy, ctx context.Context, obj, old run
 		return errors.NewInvalid(kind.GroupKind(), objectMeta.GetName(), errs)
 	}
 
+	for _, w := range strategy.WarningsOnUpdate(ctx, obj, old) {
+		warning.AddWarning(ctx, "", w)
+	}
+
 	strategy.Canonicalize(obj)
 
 	return nil

staging/src/k8s.io/kube-aggregator/pkg/registry/apiservice/strategy.go

@@ -85,6 +85,11 @@ func (apiServerStrategy) Validate(ctx context.Context, obj runtime.Object) field
 	return validation.ValidateAPIService(obj.(*apiregistration.APIService))
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (apiServerStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
+	return nil
+}
+
 func (apiServerStrategy) AllowCreateOnUpdate() bool {
 	return false
 }
@@ -100,6 +105,11 @@ func (apiServerStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Ob
 	return validation.ValidateAPIServiceUpdate(obj.(*apiregistration.APIService), old.(*apiregistration.APIService))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (apiServerStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 type apiServerStatusStrategy struct {
 	runtime.ObjectTyper
 	names.NameGenerator
@@ -156,6 +166,11 @@ func (apiServerStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runt
 	return validation.ValidateAPIServiceStatusUpdate(obj.(*apiregistration.APIService), old.(*apiregistration.APIService))
 }
 
+// WarningsOnUpdate returns warnings for the given update.
+func (apiServerStatusStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}
+
 // GetAttrs returns the labels and fields of an API server for filtering purposes.
 func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
 	apiserver, ok := obj.(*apiregistration.APIService)

staging/src/k8s.io/sample-apiserver/pkg/registry/wardle/fischer/strategy.go

@@ -79,6 +79,9 @@ func (fischerStrategy) Validate(ctx context.Context, obj runtime.Object) field.E
 	return field.ErrorList{}
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (fischerStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 func (fischerStrategy) AllowCreateOnUpdate() bool {
 	return false
 }
@@ -93,3 +96,8 @@ func (fischerStrategy) Canonicalize(obj runtime.Object) {
 func (fischerStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return field.ErrorList{}
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (fischerStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}

staging/src/k8s.io/sample-apiserver/pkg/registry/wardle/flunder/strategy.go

@@ -81,6 +81,9 @@ func (flunderStrategy) Validate(ctx context.Context, obj runtime.Object) field.E
 	return validation.ValidateFlunder(flunder)
 }
 
+// WarningsOnCreate returns warnings for the creation of the given object.
+func (flunderStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
+
 func (flunderStrategy) AllowCreateOnUpdate() bool {
 	return false
 }
@@ -95,3 +98,8 @@ func (flunderStrategy) Canonicalize(obj runtime.Object) {
 func (flunderStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
 	return field.ErrorList{}
 }
+
+// WarningsOnUpdate returns warnings for the given update.
+func (flunderStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
+	return nil
+}