/
secrets.go
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/
secrets.go
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// Copyright (c) 2020 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 secrets
import (
"context"
"fmt"
gardenerkubernetes "github.com/gardener/gardener/pkg/client/kubernetes"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
)
// Interface represents a set of secrets that can be deployed and deleted.
type Interface interface {
// Deploy generates and deploys the secrets into the given namespace, taking into account existing secrets.
Deploy(context.Context, kubernetes.Interface, gardenerkubernetes.Interface, string) (map[string]*corev1.Secret, error)
// Delete deletes the secrets from the given namespace.
Delete(context.Context, kubernetes.Interface, string) error
}
// Secrets represents a set of secrets that can be deployed and deleted.
type Secrets struct {
CertificateSecretConfigs map[string]*CertificateSecretConfig
SecretConfigsFunc func(map[string]*Certificate, string) []ConfigInterface
}
// Deploy generates and deploys the secrets into the given namespace, taking into account existing secrets.
func (s *Secrets) Deploy(
ctx context.Context,
cs kubernetes.Interface,
gcs gardenerkubernetes.Interface,
namespace string,
) (
map[string]*corev1.Secret,
error,
) {
// Get existing secrets in the namespace
existingSecrets, err := getSecrets(ctx, cs, namespace)
if err != nil {
return nil, err
}
// Generate CAs
_, cas, err := GenerateCertificateAuthorities(ctx, gcs.Client(), existingSecrets, s.CertificateSecretConfigs, namespace)
if err != nil {
return nil, fmt.Errorf("could not generate CA secrets in namespace '%s': %w", namespace, err)
}
// Generate cluster secrets
secretConfigs := s.SecretConfigsFunc(cas, namespace)
clusterSecrets, err := GenerateClusterSecrets(ctx, gcs.Client(), existingSecrets, secretConfigs, namespace)
if err != nil {
return nil, fmt.Errorf("could not generate cluster secrets in namespace '%s': %w", namespace, err)
}
return clusterSecrets, nil
}
// Delete deletes the secrets from the given namespace.
func (s *Secrets) Delete(ctx context.Context, cs kubernetes.Interface, namespace string) error {
for _, sc := range s.SecretConfigsFunc(nil, namespace) {
if err := deleteSecret(ctx, cs, namespace, sc.GetName()); err != nil {
return err
}
}
return nil
}
func getSecrets(ctx context.Context, cs kubernetes.Interface, namespace string) (map[string]*corev1.Secret, error) {
secretList, err := cs.CoreV1().Secrets(namespace).List(ctx, metav1.ListOptions{})
if err != nil {
return nil, fmt.Errorf("could not list secrets in namespace '%s': %w", namespace, err)
}
result := make(map[string]*corev1.Secret, len(secretList.Items))
for _, secret := range secretList.Items {
func(secret corev1.Secret) {
result[secret.Name] = &secret
}(secret)
}
return result, nil
}
func deleteSecret(ctx context.Context, cs kubernetes.Interface, namespace, name string) error {
return cs.CoreV1().Secrets(namespace).Delete(ctx, name, metav1.DeleteOptions{})
}