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mutator.go
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mutator.go
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// Copyright 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 cloudprovider
import (
"context"
"fmt"
"github.com/go-logr/logr"
corev1 "k8s.io/api/core/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/manager"
"github.com/gardener/gardener/extensions/pkg/webhook"
extensionscontextwebhook "github.com/gardener/gardener/extensions/pkg/webhook/context"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
)
// Ensurer ensures that the cloudprovider secret conforms to the provider requirements.
type Ensurer interface {
EnsureCloudProviderSecret(ctx context.Context, gctx extensionscontextwebhook.GardenContext, new, old *corev1.Secret) error
}
// NewMutator creates a new cloudprovider mutator.
func NewMutator(mgr manager.Manager, logger logr.Logger, ensurer Ensurer) webhook.Mutator {
return &mutator{
client: mgr.GetClient(),
logger: logger.WithName("mutator"),
ensurer: ensurer,
}
}
type mutator struct {
client client.Client
logger logr.Logger
ensurer Ensurer
}
// Mutate validates and if needed mutates the given object.
func (m *mutator) Mutate(ctx context.Context, new, old client.Object) error {
if new.GetDeletionTimestamp() != nil {
return nil
}
newSecret, ok := new.(*corev1.Secret)
if !ok {
return fmt.Errorf("could not mutate: object is not of type %q", "Secret")
}
if newSecret.Name != v1beta1constants.SecretNameCloudProvider {
return nil
}
var oldSecret *corev1.Secret
if old != nil {
oldSecret, ok = old.(*corev1.Secret)
if !ok {
return fmt.Errorf("could not mutate: old object could not be casted to type %q", "Secret")
}
}
etcx := extensionscontextwebhook.NewGardenContext(m.client, new)
webhook.LogMutation(m.logger, newSecret.Kind, newSecret.Namespace, newSecret.Name)
return m.ensurer.EnsureCloudProviderSecret(ctx, etcx, newSecret, oldSecret)
}