mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-11-04 12:18:16 +00:00
255 lines
11 KiB
Go
255 lines
11 KiB
Go
/*
|
|
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 genericvalidation
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
|
|
apimachineyvalidation "k8s.io/apimachinery/pkg/api/validation"
|
|
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"
|
|
"k8s.io/kubernetes/pkg/api"
|
|
"k8s.io/kubernetes/pkg/api/v1"
|
|
)
|
|
|
|
// TODO: delete this global variable when we enable the validation of common
|
|
// fields by default.
|
|
var RepairMalformedUpdates bool = true
|
|
|
|
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{}{
|
|
v1.SchemeGroupVersion.WithKind("Event"): {},
|
|
}
|
|
|
|
// ValidateClusterName can be used to check whether the given cluster name is valid.
|
|
var ValidateClusterName = apimachineyvalidation.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))
|
|
}
|
|
if len(allErrs) != 0 {
|
|
return allErrs
|
|
}
|
|
|
|
if len(strings.Split(stringValue, "/")) == 1 {
|
|
if !api.IsStandardFinalizerName(stringValue) {
|
|
return append(allErrs, field.Invalid(fldPath, stringValue, "name is neither a standard finalizer name nor is it fully qualified"))
|
|
}
|
|
}
|
|
|
|
return field.ErrorList{}
|
|
}
|
|
|
|
func ValidateNoNewFinalizers(newFinalizers []string, oldFinalizers []string, fldPath *field.Path) field.ErrorList {
|
|
const newFinalizersErrorMsg string = `no new finalizers can be added if the object is being deleted`
|
|
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 !api.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(meta *metav1.ObjectMeta, requiresNamespace bool, nameFn apimachineyvalidation.ValidateNameFunc, fldPath *field.Path) field.ErrorList {
|
|
allErrs := field.ErrorList{}
|
|
|
|
if len(meta.GenerateName) != 0 {
|
|
for _, msg := range nameFn(meta.GenerateName, true) {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Child("generateName"), meta.GenerateName, 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.Name) == 0 {
|
|
allErrs = append(allErrs, field.Required(fldPath.Child("name"), "name or generateName is required"))
|
|
} else {
|
|
for _, msg := range nameFn(meta.Name, false) {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Child("name"), meta.Name, msg))
|
|
}
|
|
}
|
|
if requiresNamespace {
|
|
if len(meta.Namespace) == 0 {
|
|
allErrs = append(allErrs, field.Required(fldPath.Child("namespace"), ""))
|
|
} else {
|
|
for _, msg := range apimachineyvalidation.ValidateNamespaceName(meta.Namespace, false) {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Child("namespace"), meta.Namespace, msg))
|
|
}
|
|
}
|
|
} else {
|
|
if len(meta.Namespace) != 0 {
|
|
allErrs = append(allErrs, field.Forbidden(fldPath.Child("namespace"), "not allowed on this type"))
|
|
}
|
|
}
|
|
if len(meta.ClusterName) != 0 {
|
|
for _, msg := range ValidateClusterName(meta.ClusterName, false) {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Child("clusterName"), meta.ClusterName, msg))
|
|
}
|
|
}
|
|
allErrs = append(allErrs, apimachineyvalidation.ValidateNonnegativeField(meta.Generation, fldPath.Child("generation"))...)
|
|
allErrs = append(allErrs, v1validation.ValidateLabels(meta.Labels, fldPath.Child("labels"))...)
|
|
allErrs = append(allErrs, ValidateAnnotations(meta.Annotations, fldPath.Child("annotations"))...)
|
|
allErrs = append(allErrs, ValidateOwnerReferences(meta.OwnerReferences, fldPath.Child("ownerReferences"))...)
|
|
for _, finalizer := range meta.Finalizers {
|
|
allErrs = append(allErrs, ValidateFinalizerName(finalizer, fldPath.Child("finalizers"))...)
|
|
}
|
|
return allErrs
|
|
}
|
|
|
|
// ValidateObjectMetaUpdate validates an object's metadata when updated
|
|
func ValidateObjectMetaUpdate(newMeta, oldMeta *metav1.ObjectMeta, fldPath *field.Path) field.ErrorList {
|
|
allErrs := field.ErrorList{}
|
|
|
|
if !RepairMalformedUpdates && newMeta.UID != oldMeta.UID {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Child("uid"), newMeta.UID, "field is immutable"))
|
|
}
|
|
// in the event it is left empty, set it, to allow clients more flexibility
|
|
// TODO: remove the following code that repairs the update request when we retire the clients that modify the immutable fields.
|
|
// Please do not copy this pattern elsewhere; validation functions should not be modifying the objects they are passed!
|
|
if RepairMalformedUpdates {
|
|
if len(newMeta.UID) == 0 {
|
|
newMeta.UID = oldMeta.UID
|
|
}
|
|
// ignore changes to timestamp
|
|
if oldMeta.CreationTimestamp.IsZero() {
|
|
oldMeta.CreationTimestamp = newMeta.CreationTimestamp
|
|
} else {
|
|
newMeta.CreationTimestamp = oldMeta.CreationTimestamp
|
|
}
|
|
// an object can never remove a deletion timestamp or clear/change grace period seconds
|
|
if !oldMeta.DeletionTimestamp.IsZero() {
|
|
newMeta.DeletionTimestamp = oldMeta.DeletionTimestamp
|
|
}
|
|
if oldMeta.DeletionGracePeriodSeconds != nil && newMeta.DeletionGracePeriodSeconds == nil {
|
|
newMeta.DeletionGracePeriodSeconds = oldMeta.DeletionGracePeriodSeconds
|
|
}
|
|
}
|
|
|
|
// TODO: needs to check if newMeta==nil && oldMeta !=nil after the repair logic is removed.
|
|
if newMeta.DeletionGracePeriodSeconds != nil && (oldMeta.DeletionGracePeriodSeconds == nil || *newMeta.DeletionGracePeriodSeconds != *oldMeta.DeletionGracePeriodSeconds) {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Child("deletionGracePeriodSeconds"), newMeta.DeletionGracePeriodSeconds, "field is immutable; may only be changed via deletion"))
|
|
}
|
|
if newMeta.DeletionTimestamp != nil && (oldMeta.DeletionTimestamp == nil || !newMeta.DeletionTimestamp.Equal(*oldMeta.DeletionTimestamp)) {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Child("deletionTimestamp"), newMeta.DeletionTimestamp, "field is immutable; may only be changed via deletion"))
|
|
}
|
|
|
|
// Finalizers cannot be added if the object is already being deleted.
|
|
if oldMeta.DeletionTimestamp != nil {
|
|
allErrs = append(allErrs, ValidateNoNewFinalizers(newMeta.Finalizers, oldMeta.Finalizers, fldPath.Child("finalizers"))...)
|
|
}
|
|
|
|
// Reject updates that don't specify a resource version
|
|
if len(newMeta.ResourceVersion) == 0 {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Child("resourceVersion"), newMeta.ResourceVersion, "must be specified for an update"))
|
|
}
|
|
|
|
// Generation shouldn't be decremented
|
|
if newMeta.Generation < oldMeta.Generation {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Child("generation"), newMeta.Generation, "must not be decremented"))
|
|
}
|
|
|
|
allErrs = append(allErrs, ValidateImmutableField(newMeta.Name, oldMeta.Name, fldPath.Child("name"))...)
|
|
allErrs = append(allErrs, ValidateImmutableField(newMeta.Namespace, oldMeta.Namespace, fldPath.Child("namespace"))...)
|
|
allErrs = append(allErrs, ValidateImmutableField(newMeta.UID, oldMeta.UID, fldPath.Child("uid"))...)
|
|
allErrs = append(allErrs, ValidateImmutableField(newMeta.CreationTimestamp, oldMeta.CreationTimestamp, fldPath.Child("creationTimestamp"))...)
|
|
allErrs = append(allErrs, ValidateImmutableField(newMeta.ClusterName, oldMeta.ClusterName, fldPath.Child("clusterName"))...)
|
|
|
|
allErrs = append(allErrs, v1validation.ValidateLabels(newMeta.Labels, fldPath.Child("labels"))...)
|
|
allErrs = append(allErrs, ValidateAnnotations(newMeta.Annotations, fldPath.Child("annotations"))...)
|
|
allErrs = append(allErrs, ValidateOwnerReferences(newMeta.OwnerReferences, fldPath.Child("ownerReferences"))...)
|
|
|
|
return allErrs
|
|
}
|