// ValidatePetSetUpdate tests if required fields in the PetSet are set.
func ValidatePetSetUpdate(petSet, oldPetSet *apps.PetSet) field.ErrorList {
allErrs := field.ErrorList{}
// TODO: For now we're taking the safe route and disallowing all updates to spec except for Spec.Replicas.
// Enable on a case by case basis.
restoreReplicas := petSet.Spec.Replicas
petSet.Spec.Replicas = oldPetSet.Spec.Replicas
// The generation changes for this update
restoreGeneration := petSet.Generation
petSet.Generation = oldPetSet.Generation
if !reflect.DeepEqual(petSet, oldPetSet) {
allErrs = append(allErrs, field.Forbidden(field.NewPath("spec"), "updates to petset spec for fields other than 'replicas' are forbidden."))
}
petSet.Spec.Replicas = restoreReplicas
petSet.Generation = restoreGeneration
allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(petSet.Spec.Replicas), field.NewPath("spec", "replicas"))...)
return allErrs
}
