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add.go
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add.go
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// Copyright (c) 2021 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 node
import (
extensionswebhook "github.com/gardener/gardener/extensions/pkg/webhook"
"github.com/gardener/gardener/pkg/provider-local/local"
admissionregistrationv1 "k8s.io/api/admissionregistration/v1"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/utils/pointer"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
)
// WebhookName is the name of the node webhook.
const WebhookName = "node"
var (
logger = log.Log.WithName("local-node-webhook")
// DefaultAddOptions are the default AddOptions for AddToManager.
DefaultAddOptions = AddOptions{}
)
// AddOptions are options to apply when adding the local exposure webhook to the manager.
type AddOptions struct{}
// AddToManagerWithOptions creates a webhook with the given options and adds it to the manager.
func AddToManagerWithOptions(mgr manager.Manager, opts AddOptions) (*extensionswebhook.Webhook, error) {
logger.Info("Adding webhook to manager")
var (
name = "node"
provider = local.Type
types = []extensionswebhook.Type{{Obj: &corev1.Node{}, Subresource: pointer.String("status")}}
failurePolicy = admissionregistrationv1.Fail
)
logger = logger.WithValues("provider", provider)
handler, err := extensionswebhook.NewBuilder(mgr, logger).WithMutator(&mutator{}, types...).Build()
if err != nil {
return nil, err
}
logger.Info("Creating webhook", "name", name)
return &extensionswebhook.Webhook{
Name: name,
Provider: provider,
Types: types,
Target: extensionswebhook.TargetSeed,
Path: name,
Webhook: &admission.Webhook{Handler: handler},
ObjectSelector: &metav1.LabelSelector{MatchLabels: map[string]string{"kubernetes.io/hostname": "gardener-local-control-plane"}},
FailurePolicy: &failurePolicy,
TimeoutSeconds: pointer.Int32(1),
}, nil
}
// AddToManager creates a webhook with the default options and adds it to the manager.
func AddToManager(mgr manager.Manager) (*extensionswebhook.Webhook, error) {
return AddToManagerWithOptions(mgr, DefaultAddOptions)
}