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backend_webhook.go
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backend_webhook.go
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/*
* Copyright (c) 2023, WSO2 LLC. (http://www.wso2.org) All Rights Reserved.
*
* 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 v1alpha1
import (
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/validation/field"
ctrl "sigs.k8s.io/controller-runtime"
logf "sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/webhook"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
)
// log is for logging in this package.
var backendlog = logf.Log.WithName("backend-resource")
// SetupWebhookWithManager sets up and registers the backend webhook with the manager.
func (r *Backend) SetupWebhookWithManager(mgr ctrl.Manager) error {
return ctrl.NewWebhookManagedBy(mgr).
For(r).
Complete()
}
// TODO(user): EDIT THIS FILE! THIS IS SCAFFOLDING FOR YOU TO OWN!
//+kubebuilder:webhook:path=/mutate-dp-wso2-com-v1alpha1-backend,mutating=true,failurePolicy=fail,sideEffects=None,groups=dp.wso2.com,resources=backends,verbs=create;update,versions=v1alpha1,name=mbackend.kb.io,admissionReviewVersions=v1
var _ webhook.Defaulter = &Backend{}
// Default implements webhook.Defaulter so a webhook will be registered for the type
func (r *Backend) Default() {
backendlog.Info("default", "name", r.Name)
// TODO(user): fill in your defaulting logic.
}
// TODO(user): change verbs to "verbs=create;update;delete" if you want to enable deletion validation.
//+kubebuilder:webhook:path=/validate-dp-wso2-com-v1alpha1-backend,mutating=false,failurePolicy=fail,sideEffects=None,groups=dp.wso2.com,resources=backends,verbs=create;update,versions=v1alpha1,name=vbackend.kb.io,admissionReviewVersions=v1
var _ webhook.Validator = &Backend{}
// ValidateCreate implements webhook.Validator so a webhook will be registered for the type
func (r *Backend) ValidateCreate() (admission.Warnings, error) {
return nil, r.validateBackendSpec()
}
// ValidateUpdate implements webhook.Validator so a webhook will be registered for the type
func (r *Backend) ValidateUpdate(old runtime.Object) (admission.Warnings, error) {
return nil, r.validateBackendSpec()
}
// ValidateDelete implements webhook.Validator so a webhook will be registered for the type
func (r *Backend) ValidateDelete() (admission.Warnings, error) {
backendlog.Info("validate delete", "name", r.Name)
// TODO(user): fill in your validation logic upon object deletion.
return nil, nil
}
func (r *Backend) validateBackendSpec() error {
var allErrs field.ErrorList
retryConfig := r.Spec.Retry
if retryConfig != nil {
for _, statusCode := range retryConfig.StatusCodes {
if statusCode > 598 || statusCode < 401 {
allErrs = append(allErrs, field.Invalid(field.NewPath("spec").Child("retry").Child("statusCodes"),
retryConfig.StatusCodes, "status code should be between 401 and 598"))
}
}
}
if len(allErrs) > 0 {
return apierrors.NewInvalid(
schema.GroupKind{Group: "dp.wso2.com", Kind: "Backend"},
r.Name, allErrs)
}
return nil
}