|
| 1 | +/* |
| 2 | +Copyright 2024. |
| 3 | +
|
| 4 | +Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | +you may not use this file except in compliance with the License. |
| 6 | +You may obtain a copy of the License at |
| 7 | +
|
| 8 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +
|
| 10 | +Unless required by applicable law or agreed to in writing, software |
| 11 | +distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +See the License for the specific language governing permissions and |
| 14 | +limitations under the License. |
| 15 | +*/ |
| 16 | + |
| 17 | +package controllers |
| 18 | + |
| 19 | +import ( |
| 20 | + "context" |
| 21 | + "encoding/json" |
| 22 | + "fmt" |
| 23 | + "os" |
| 24 | + |
| 25 | + "github.com/go-logr/logr" |
| 26 | + corev1 "k8s.io/api/core/v1" |
| 27 | + apierrors "k8s.io/apimachinery/pkg/api/errors" |
| 28 | + ctrl "sigs.k8s.io/controller-runtime" |
| 29 | + "sigs.k8s.io/controller-runtime/pkg/client" |
| 30 | + "sigs.k8s.io/controller-runtime/pkg/log" |
| 31 | + "sigs.k8s.io/controller-runtime/pkg/predicate" |
| 32 | +) |
| 33 | + |
| 34 | +// SecretSyncerReconciler reconciles a specific secret object |
| 35 | +type SecretSyncerReconciler struct { |
| 36 | + client.Client |
| 37 | + SecretName string |
| 38 | + SecretNamespace string |
| 39 | + AuthFilePath string |
| 40 | +} |
| 41 | + |
| 42 | +// +kubebuilder:rbac:groups="",resources=secrets,verbs=get;list;watch |
| 43 | + |
| 44 | +func (r *SecretSyncerReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) { |
| 45 | + logger := log.FromContext(ctx) |
| 46 | + |
| 47 | + // Ensure that the request matches the specific secret you want to watch |
| 48 | + if req.Name != r.SecretName || req.Namespace != r.SecretNamespace { |
| 49 | + logger.Info("Received unexpected request for secret", req.Name, "in namespace", req.Namespace) |
| 50 | + return ctrl.Result{}, nil |
| 51 | + } |
| 52 | + |
| 53 | + secret := &corev1.Secret{} |
| 54 | + err := r.Get(ctx, req.NamespacedName, secret) |
| 55 | + if err != nil { |
| 56 | + if apierrors.IsNotFound(err) { |
| 57 | + logger.Info("Secret", req.Name, "in namespace", req.Namespace, "deleted.") |
| 58 | + return r.deleteSecretFile(logger) |
| 59 | + } |
| 60 | + logger.Error(err, "Failed to get Secret") |
| 61 | + return ctrl.Result{}, err |
| 62 | + } |
| 63 | + |
| 64 | + return r.writeSecretToFile(secret, logger) |
| 65 | +} |
| 66 | + |
| 67 | +// SetupWithManager sets up the controller with the Manager. |
| 68 | +func (r *SecretSyncerReconciler) SetupWithManager(mgr ctrl.Manager) error { |
| 69 | + _, err := ctrl.NewControllerManagedBy(mgr). |
| 70 | + For(&corev1.Secret{}). |
| 71 | + WithEventFilter(newSecretPredicate(r.SecretName, r.SecretNamespace)). |
| 72 | + Build(r) |
| 73 | + |
| 74 | + return err |
| 75 | +} |
| 76 | + |
| 77 | +func newSecretPredicate(secretName, secretNamespace string) predicate.Predicate { |
| 78 | + return predicate.NewPredicateFuncs(func(obj client.Object) bool { |
| 79 | + secret, ok := obj.(*corev1.Secret) |
| 80 | + if !ok { |
| 81 | + return false |
| 82 | + } |
| 83 | + return secret.Name == secretName && secret.Namespace == secretNamespace |
| 84 | + }) |
| 85 | +} |
| 86 | + |
| 87 | +// writeSecretToFile writes the secret data to the specified file |
| 88 | +func (r *SecretSyncerReconciler) writeSecretToFile(secret *corev1.Secret, logger logr.Logger) (ctrl.Result, error) { |
| 89 | + jsonData, err := json.Marshal(secret.Data) |
| 90 | + if err != nil { |
| 91 | + return ctrl.Result{}, fmt.Errorf("failed to marshal secret data: %w", err) |
| 92 | + } |
| 93 | + err = os.WriteFile(r.AuthFilePath, jsonData, 0644) |
| 94 | + if err != nil { |
| 95 | + return ctrl.Result{}, fmt.Errorf("failed to write secret data to file: %w", err) |
| 96 | + } |
| 97 | + logger.Info("Saved Secret data locally") |
| 98 | + return ctrl.Result{}, nil |
| 99 | +} |
| 100 | + |
| 101 | +// deleteSecretFile deletes the secret file if the secret is deleted |
| 102 | +func (r *SecretSyncerReconciler) deleteSecretFile(logger logr.Logger) (ctrl.Result, error) { |
| 103 | + logger.Info("Deleting local auth file.") |
| 104 | + if _, err := os.Stat(r.AuthFilePath); err == nil { |
| 105 | + err := os.Remove(r.AuthFilePath) |
| 106 | + if err != nil { |
| 107 | + return ctrl.Result{}, fmt.Errorf("failed to delete secret file: %w", err) |
| 108 | + } |
| 109 | + logger.Info("Auth file deleted successfully", "file", r.AuthFilePath) |
| 110 | + } else if os.IsNotExist(err) { |
| 111 | + logger.Info("Secret file does not exist, nothing to delete", "file", r.AuthFilePath) |
| 112 | + } else { |
| 113 | + return ctrl.Result{}, fmt.Errorf("failed to check secret file: %w", err) |
| 114 | + } |
| 115 | + |
| 116 | + return ctrl.Result{}, nil |
| 117 | +} |
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