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secretbinding.go
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secretbinding.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package validator
import (
"context"
"fmt"
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"
"sigs.k8s.io/controller-runtime/pkg/manager"
azurevalidation "github.com/gardener/gardener-extension-provider-azure/pkg/apis/azure/validation"
)
type secretBinding struct {
apiReader client.Reader
}
// NewSecretBindingValidator returns a new instance of a secret binding validator.
func NewSecretBindingValidator(mgr manager.Manager) extensionswebhook.Validator {
return &secretBinding{
apiReader: mgr.GetAPIReader(),
}
}
// Validate checks whether the given SecretBinding refers to a Secret with valid Azure 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 azurevalidation.ValidateCloudProviderSecret(secret, nil)
}