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controllerregistration.go
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controllerregistration.go
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// Copyright (c) 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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"
"github.com/gardener/gardener/pkg/apis/core"
"github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
apiequality "k8s.io/apimachinery/pkg/api/equality"
apivalidation "k8s.io/apimachinery/pkg/api/validation"
"k8s.io/apimachinery/pkg/util/validation/field"
)
// ValidateControllerRegistration validates a ControllerRegistration object.
func ValidateControllerRegistration(controllerRegistration *core.ControllerRegistration) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, apivalidation.ValidateObjectMeta(&controllerRegistration.ObjectMeta, false, apivalidation.NameIsDNSLabel, field.NewPath("metadata"))...)
allErrs = append(allErrs, ValidateControllerRegistrationSpec(&controllerRegistration.Spec, field.NewPath("spec"))...)
return allErrs
}
// ValidateControllerRegistrationSpec validates the specification of a ControllerRegistration object.
func ValidateControllerRegistrationSpec(spec *core.ControllerRegistrationSpec, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
var (
resources = make(map[string]string, len(spec.Resources))
resourcesPath = fldPath.Child("resources")
)
for i, resource := range spec.Resources {
idxPath := resourcesPath.Index(i)
if len(resource.Kind) == 0 {
allErrs = append(allErrs, field.Required(idxPath.Child("kind"), "field is required"))
}
if len(resource.Type) == 0 {
allErrs = append(allErrs, field.Required(idxPath.Child("type"), "field is required"))
}
if t, ok := resources[resource.Kind]; ok && t == resource.Type {
allErrs = append(allErrs, field.Duplicate(idxPath, fmt.Sprintf("%s/%s", resource.Kind, resource.Type)))
}
if resource.GloballyEnabled != nil && resource.Kind != v1alpha1.ExtensionResource {
allErrs = append(allErrs, field.Forbidden(idxPath.Child("globallyEnabled"), fmt.Sprintf("field must not be set when kind != %s", v1alpha1.ExtensionResource)))
}
resources[resource.Kind] = resource.Type
}
return allErrs
}
// ValidateControllerRegistrationUpdate validates a ControllerRegistration object before an update.
func ValidateControllerRegistrationUpdate(new, old *core.ControllerRegistration) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, apivalidation.ValidateObjectMetaUpdate(&new.ObjectMeta, &old.ObjectMeta, field.NewPath("metadata"))...)
allErrs = append(allErrs, ValidateControllerRegistrationSpecUpdate(&new.Spec, &old.Spec, new.DeletionTimestamp != nil, field.NewPath("spec"))...)
allErrs = append(allErrs, ValidateControllerRegistration(new)...)
return allErrs
}
func ValidateControllerRegistrationSpecUpdate(new, old *core.ControllerRegistrationSpec, deletionTimestampSet bool, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if deletionTimestampSet && !apiequality.Semantic.DeepEqual(new, old) {
allErrs = append(allErrs, apivalidation.ValidateImmutableField(new, old, fldPath)...)
return allErrs
}
return allErrs
}