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validation.go
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validation.go
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/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package validation
import (
"fmt"
"strings"
genericvalidation "k8s.io/apimachinery/pkg/api/validation"
validationutil "k8s.io/apimachinery/pkg/util/validation"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/kube-apiextensions-server/pkg/apis/apiextensions"
)
// ValidateCustomResourceDefinition statically validates
func ValidateCustomResourceDefinition(obj *apiextensions.CustomResourceDefinition) field.ErrorList {
nameValidationFn := func(name string, prefix bool) []string {
ret := genericvalidation.NameIsDNSSubdomain(name, prefix)
requiredName := obj.Spec.Names.Plural + "." + obj.Spec.Group
if name != requiredName {
ret = append(ret, fmt.Sprintf(`must be spec.names.plural+"."+spec.group`))
}
return ret
}
allErrs := genericvalidation.ValidateObjectMeta(&obj.ObjectMeta, false, nameValidationFn, field.NewPath("metadata"))
allErrs = append(allErrs, ValidateCustomResourceDefinitionSpec(&obj.Spec, field.NewPath("spec"))...)
allErrs = append(allErrs, ValidateCustomResourceDefinitionStatus(&obj.Status, field.NewPath("status"))...)
return allErrs
}
// ValidateCustomResourceDefinitionUpdate statically validates
func ValidateCustomResourceDefinitionUpdate(obj, oldObj *apiextensions.CustomResourceDefinition) field.ErrorList {
allErrs := genericvalidation.ValidateObjectMetaUpdate(&obj.ObjectMeta, &oldObj.ObjectMeta, field.NewPath("metadata"))
allErrs = append(allErrs, ValidateCustomResourceDefinitionSpecUpdate(&obj.Spec, &oldObj.Spec, field.NewPath("spec"))...)
allErrs = append(allErrs, ValidateCustomResourceDefinitionStatus(&obj.Status, field.NewPath("status"))...)
return allErrs
}
// ValidateUpdateCustomResourceDefinitionStatus statically validates
func ValidateUpdateCustomResourceDefinitionStatus(obj, oldObj *apiextensions.CustomResourceDefinition) field.ErrorList {
allErrs := genericvalidation.ValidateObjectMetaUpdate(&obj.ObjectMeta, &oldObj.ObjectMeta, field.NewPath("metadata"))
allErrs = append(allErrs, ValidateCustomResourceDefinitionStatus(&obj.Status, field.NewPath("status"))...)
return allErrs
}
// ValidateCustomResourceDefinitionSpec statically validates
func ValidateCustomResourceDefinitionSpec(spec *apiextensions.CustomResourceDefinitionSpec, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if len(spec.Group) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("group"), ""))
}
if errs := validationutil.IsDNS1123Subdomain(spec.Group); len(errs) > 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("group"), spec.Group, strings.Join(errs, ",")))
}
if len(strings.Split(spec.Group, ".")) < 2 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("group"), spec.Group, "should be a domain with at least one dot"))
}
if len(spec.Version) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("version"), ""))
}
if errs := validationutil.IsDNS1035Label(spec.Version); len(errs) > 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("version"), spec.Version, strings.Join(errs, ",")))
}
switch spec.Scope {
case apiextensions.ClusterScoped, apiextensions.NamespaceScoped:
default:
allErrs = append(allErrs, field.NotSupported(fldPath.Child("scope"), spec.Scope, []string{string(apiextensions.ClusterScoped), string(apiextensions.NamespaceScoped)}))
}
// in addition to the basic name restrictions, some names are required for spec, but not for status
if len(spec.Names.Plural) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("names", "plural"), ""))
}
if len(spec.Names.Singular) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("names", "singular"), ""))
}
if len(spec.Names.Kind) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("names", "kind"), ""))
}
if len(spec.Names.ListKind) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("names", "listKind"), ""))
}
allErrs = append(allErrs, ValidateCustomResourceDefinitionNames(&spec.Names, fldPath.Child("names"))...)
return allErrs
}
// ValidateCustomResourceDefinitionSpecUpdate statically validates
func ValidateCustomResourceDefinitionSpecUpdate(spec, oldSpec *apiextensions.CustomResourceDefinitionSpec, fldPath *field.Path) field.ErrorList {
allErrs := ValidateCustomResourceDefinitionSpec(spec, fldPath)
// these all affect the storage, so you can't change them
genericvalidation.ValidateImmutableField(spec.Group, oldSpec.Group, fldPath.Child("group"))
genericvalidation.ValidateImmutableField(spec.Version, oldSpec.Version, fldPath.Child("version"))
genericvalidation.ValidateImmutableField(spec.Scope, oldSpec.Scope, fldPath.Child("scope"))
genericvalidation.ValidateImmutableField(spec.Names.Kind, oldSpec.Names.Kind, fldPath.Child("names", "kind"))
// this affects the expected resource name, so you can't change it either
genericvalidation.ValidateImmutableField(spec.Names.Plural, oldSpec.Names.Plural, fldPath.Child("names", "plural"))
return allErrs
}
// ValidateCustomResourceDefinitionStatus statically validates
func ValidateCustomResourceDefinitionStatus(status *apiextensions.CustomResourceDefinitionStatus, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, ValidateCustomResourceDefinitionNames(&status.AcceptedNames, fldPath.Child("acceptedNames"))...)
return allErrs
}
// ValidateCustomResourceDefinitionNames statically validates
func ValidateCustomResourceDefinitionNames(names *apiextensions.CustomResourceDefinitionNames, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if errs := validationutil.IsDNS1035Label(names.Plural); len(names.Plural) > 0 && len(errs) > 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("plural"), names.Plural, strings.Join(errs, ",")))
}
if errs := validationutil.IsDNS1035Label(names.Singular); len(names.Singular) > 0 && len(errs) > 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("singular"), names.Singular, strings.Join(errs, ",")))
}
if errs := validationutil.IsDNS1035Label(strings.ToLower(names.Kind)); len(names.Kind) > 0 && len(errs) > 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("kind"), names.Kind, "may have mixed case, but should otherwise match: "+strings.Join(errs, ",")))
}
if errs := validationutil.IsDNS1035Label(strings.ToLower(names.ListKind)); len(names.ListKind) > 0 && len(errs) > 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("listKind"), names.ListKind, "may have mixed case, but should otherwise match: "+strings.Join(errs, ",")))
}
for i, shortName := range names.ShortNames {
if errs := validationutil.IsDNS1035Label(shortName); len(errs) > 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("shortNames").Index(i), shortName, strings.Join(errs, ",")))
}
}
// kind and listKind may not be the same or parsing become ambiguous
if len(names.Kind) > 0 && names.Kind == names.ListKind {
allErrs = append(allErrs, field.Invalid(fldPath.Child("listKind"), names.ListKind, "kind and listKind may not be the same"))
}
return allErrs
}