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allow pvc spec StorageClass name mutation if the feature is enabled

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This commit is contained in:
Roman Bednar 2022-07-29 08:53:50 +02:00
parent 0f0d61f91c
commit f051cc7e0e
1 changed files with 23 additions and 2 deletions
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25
pkg/apis/core/validation/validation.go
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@ -2171,7 +2171,7 @@ func ValidatePersistentVolumeClaimUpdate(newPvc, oldPvc *core.PersistentVolumeCl
oldPvcClone.Spec.VolumeName = newPvcClone.Spec.VolumeName // +k8s:verify-mutation:reason=clone
}
if validateStorageClassUpgrade(oldPvcClone.Annotations, newPvcClone.Annotations,
if validateStorageClassUpgradeFromAnnotation(oldPvcClone.Annotations, newPvcClone.Annotations,
oldPvcClone.Spec.StorageClassName, newPvcClone.Spec.StorageClassName) {
newPvcClone.Spec.StorageClassName = nil
metav1.SetMetaDataAnnotation(&newPvcClone.ObjectMeta, core.BetaStorageClassAnnotation, oldPvcClone.Annotations[core.BetaStorageClassAnnotation])
@ -2179,6 +2179,13 @@ func ValidatePersistentVolumeClaimUpdate(newPvc, oldPvc *core.PersistentVolumeCl
// storageclass annotation should be immutable after creation
// TODO: remove Beta when no longer needed
allErrs = append(allErrs, ValidateImmutableAnnotation(newPvc.ObjectMeta.Annotations[v1.BetaStorageClassAnnotation], oldPvc.ObjectMeta.Annotations[v1.BetaStorageClassAnnotation], v1.BetaStorageClassAnnotation, field.NewPath("metadata"))...)
// If update from annotation to attribute failed we can attempt try to validate update from nil value.
if validateStorageClassUpgradeFromNil(oldPvc.Annotations, oldPvc.Spec.StorageClassName, newPvc.Spec.StorageClassName, opts) {
newPvcClone.Spec.StorageClassName = oldPvcClone.Spec.StorageClassName // +k8s:verify-mutation:reason=clone
}
// TODO: add a specific error with a hint that storage class name can not be changed
// (instead of letting spec comparison below return generic field forbidden error)
}
// lets make sure storage values are same.
@ -2219,7 +2226,7 @@ func ValidatePersistentVolumeClaimUpdate(newPvc, oldPvc *core.PersistentVolumeCl
// 2. The old pvc's StorageClassName is not set
// 3. The new pvc's StorageClassName is set and equal to the old value in annotation
// 4. If the new pvc's StorageClassAnnotation is set,it must be equal to the old pv/pvc's StorageClassAnnotation
func validateStorageClassUpgrade(oldAnnotations, newAnnotations map[string]string, oldScName, newScName *string) bool {
func validateStorageClassUpgradeFromAnnotation(oldAnnotations, newAnnotations map[string]string, oldScName, newScName *string) bool {
oldSc, oldAnnotationExist := oldAnnotations[core.BetaStorageClassAnnotation]
newScInAnnotation, newAnnotationExist := newAnnotations[core.BetaStorageClassAnnotation]
return oldAnnotationExist /* condition 1 */ &&
@ -2228,6 +2235,20 @@ func validateStorageClassUpgrade(oldAnnotations, newAnnotations map[string]strin
(!newAnnotationExist || newScInAnnotation == oldSc) /* condition 4 */
}
// Provide an upgrade path from PVC with nil storage class. We allow update of
// StorageClassName only if following four conditions are met at the same time:
// 1. RetroactiveDefaultStorageClass FeatureGate is enabled
// 2. The new pvc's StorageClassName is not nil
// 3. The old pvc's StorageClassName is nil
// 4. The old pvc either does not have beta annotation set, or the beta annotation matches new pvc's StorageClassName
func validateStorageClassUpgradeFromNil(oldAnnotations map[string]string, oldScName, newScName *string, opts PersistentVolumeClaimSpecValidationOptions) bool {
oldAnnotation, oldAnnotationExist := oldAnnotations[core.BetaStorageClassAnnotation]
return opts.EnableRetroactiveDefaultStorageClass /* condition 1 */ &&
newScName != nil /* condition 2 */ &&
oldScName == nil /* condition 3 */ &&
(!oldAnnotationExist || *newScName == oldAnnotation) /* condition 4 */
}
var resizeStatusSet = sets.NewString(string(core.PersistentVolumeClaimNoExpansionInProgress),
string(core.PersistentVolumeClaimControllerExpansionInProgress),
string(core.PersistentVolumeClaimControllerExpansionFailed),