/
secretbinding.go
76 lines (64 loc) · 2.68 KB
/
secretbinding.go
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// Copyright (c) 2022 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 validator
import (
"context"
"fmt"
openstackvalidation "github.com/gardener/gardener-extension-provider-openstack/pkg/apis/openstack/validation"
extensionswebhook "github.com/gardener/gardener/extensions/pkg/webhook"
"github.com/gardener/gardener/pkg/apis/core"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/equality"
"sigs.k8s.io/controller-runtime/pkg/client"
)
type secretBinding struct {
apiReader client.Reader
}
// InjectAPIReader injects the given apiReader into the validator.
func (sb *secretBinding) InjectAPIReader(apiReader client.Reader) error {
sb.apiReader = apiReader
return nil
}
// NewSecretBindingValidator returns a new instance of a secret binding validator.
func NewSecretBindingValidator() extensionswebhook.Validator {
return &secretBinding{}
}
// Validate checks whether the given SecretBinding refers to a Secret with valid OpenStack credentials.
func (sb *secretBinding) Validate(ctx context.Context, newObj, oldObj client.Object) error {
secretBinding, ok := newObj.(*core.SecretBinding)
if !ok {
return fmt.Errorf("wrong object type %T", newObj)
}
if oldObj != nil {
oldSecretBinding, ok := oldObj.(*core.SecretBinding)
if !ok {
return fmt.Errorf("wrong object type %T for old object", oldObj)
}
// If the provider type did not change, we exit early.
if oldSecretBinding.Provider != nil && equality.Semantic.DeepEqual(secretBinding.Provider.Type, oldSecretBinding.Provider.Type) {
return nil
}
}
var (
secret = &corev1.Secret{}
secretKey = kutil.Key(secretBinding.SecretRef.Namespace, secretBinding.SecretRef.Name)
)
// Explicitly use the client.Reader to prevent controller-runtime to start Informer for Secrets
// under the hood. The latter increases the memory usage of the component.
if err := sb.apiReader.Get(ctx, secretKey, secret); err != nil {
return err
}
return openstackvalidation.ValidateCloudProviderSecret(secret)
}