/
reconciler.go
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/
reconciler.go
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// Copyright (c) 2019 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 backupbucket
import (
"context"
"fmt"
"github.com/go-logr/logr"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/retry"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/runtime/inject"
extensionscontroller "github.com/gardener/gardener/extensions/pkg/controller"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
gardencorev1beta1helper "github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/controllerutils"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
)
const (
// EventBackupBucketReconciliation an event reason to describe backup entry reconciliation.
EventBackupBucketReconciliation string = "BackupBucketReconciliation"
// EventBackupBucketDeletion an event reason to describe backup entry deletion.
EventBackupBucketDeletion string = "BackupBucketDeletion"
)
type reconciler struct {
logger logr.Logger
actuator Actuator
client client.Client
reader client.Reader
recorder record.EventRecorder
}
// NewReconciler creates a new reconcile.Reconciler that reconciles
// BackupBucket resources of Gardener's `extensions.gardener.cloud` API group.
func NewReconciler(mgr manager.Manager, actuator Actuator) reconcile.Reconciler {
return extensionscontroller.OperationAnnotationWrapper(
func() client.Object { return &extensionsv1alpha1.BackupBucket{} },
&reconciler{
logger: log.Log.WithName(ControllerName),
actuator: actuator,
recorder: mgr.GetEventRecorderFor(ControllerName),
})
}
func (r *reconciler) InjectFunc(f inject.Func) error {
return f(r.actuator)
}
func (r *reconciler) InjectClient(client client.Client) error {
r.client = client
return nil
}
func (r *reconciler) InjectAPIReader(reader client.Reader) error {
r.reader = reader
return nil
}
func (r *reconciler) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
bb := &extensionsv1alpha1.BackupBucket{}
if err := r.client.Get(ctx, request.NamespacedName, bb); err != nil {
if errors.IsNotFound(err) {
return reconcile.Result{}, nil
}
return reconcile.Result{}, err
}
if bb.DeletionTimestamp != nil {
return r.delete(ctx, bb)
}
return r.reconcile(ctx, bb)
}
func (r *reconciler) reconcile(ctx context.Context, bb *extensionsv1alpha1.BackupBucket) (reconcile.Result, error) {
if err := controllerutils.EnsureFinalizer(ctx, r.reader, r.client, bb, FinalizerName); err != nil {
return reconcile.Result{}, fmt.Errorf("failed to ensure finalizer on backup bucket: %+v", err)
}
operationType := gardencorev1beta1helper.ComputeOperationType(bb.ObjectMeta, bb.Status.LastOperation)
if err := r.updateStatusProcessing(ctx, bb, operationType, "Reconciling the backupbucket"); err != nil {
return reconcile.Result{}, err
}
secret, err := kutil.GetSecretByReference(ctx, r.client, &bb.Spec.SecretRef)
if err != nil {
return reconcile.Result{}, fmt.Errorf("failed to get backup bucket secret: %+v", err)
}
if err := controllerutils.EnsureFinalizer(ctx, r.reader, r.client, secret, FinalizerName); err != nil {
return reconcile.Result{}, fmt.Errorf("failed to ensure finalizer on bucket secret: %+v", err)
}
r.logger.Info("Starting the reconciliation of backupbucket", "backupbucket", bb.Name)
r.recorder.Event(bb, corev1.EventTypeNormal, EventBackupBucketReconciliation, "Reconciling the backupbucket")
if err := r.actuator.Reconcile(ctx, bb); err != nil {
msg := "Error reconciling backupbucket"
_ = r.updateStatusError(ctx, extensionscontroller.ReconcileErrCauseOrErr(err), bb, operationType, msg)
return extensionscontroller.ReconcileErr(err)
}
msg := "Successfully reconciled backupbucket"
r.logger.Info(msg, "backupbucket", bb.Name)
r.recorder.Event(bb, corev1.EventTypeNormal, EventBackupBucketReconciliation, msg)
if err := r.updateStatusSuccess(ctx, bb, operationType, msg); err != nil {
return reconcile.Result{}, err
}
return reconcile.Result{}, nil
}
func (r *reconciler) delete(ctx context.Context, bb *extensionsv1alpha1.BackupBucket) (reconcile.Result, error) {
if !controllerutil.ContainsFinalizer(bb, FinalizerName) {
r.logger.Info("Deleting backupbucket causes a no-op as there is no finalizer.", "backupbucket", bb.Name)
return reconcile.Result{}, nil
}
operationType := gardencorev1beta1helper.ComputeOperationType(bb.ObjectMeta, bb.Status.LastOperation)
if err := r.updateStatusProcessing(ctx, bb, operationType, "Deleting the backupbucket"); err != nil {
return reconcile.Result{}, err
}
r.logger.Info("Starting the deletion of backupbucket", "backupbucket", bb.Name)
r.recorder.Event(bb, corev1.EventTypeNormal, EventBackupBucketDeletion, "Deleting the backupbucket")
if err := r.actuator.Delete(ctx, bb); err != nil {
msg := "Error deleting backupbucket"
r.recorder.Eventf(bb, corev1.EventTypeWarning, EventBackupBucketDeletion, "%s: %+v", msg, err)
_ = r.updateStatusError(ctx, extensionscontroller.ReconcileErrCauseOrErr(err), bb, operationType, msg)
return extensionscontroller.ReconcileErr(err)
}
msg := "Successfully deleted backupbucket"
r.logger.Info(msg, "backupbucket", bb.Name)
r.recorder.Event(bb, corev1.EventTypeNormal, EventBackupBucketDeletion, msg)
if err := r.updateStatusSuccess(ctx, bb, operationType, msg); err != nil {
return reconcile.Result{}, err
}
secret, err := kutil.GetSecretByReference(ctx, r.client, &bb.Spec.SecretRef)
if err != nil {
return reconcile.Result{}, fmt.Errorf("failed to get backup bucket secret: %+v", err)
}
if err := controllerutils.RemoveFinalizer(ctx, r.reader, r.client, secret, FinalizerName); err != nil {
return reconcile.Result{}, fmt.Errorf("failed to remove finalizer on bucket secret: %+v", err)
}
r.logger.Info("Removing finalizer.", "backupbucket", bb.Name)
if err := controllerutils.RemoveFinalizer(ctx, r.reader, r.client, bb, FinalizerName); err != nil {
return reconcile.Result{}, fmt.Errorf("error removing finalizer from backupbucket: %+v", err)
}
return reconcile.Result{}, nil
}
func (r *reconciler) updateStatusProcessing(ctx context.Context, bb *extensionsv1alpha1.BackupBucket, lastOperationType gardencorev1beta1.LastOperationType, description string) error {
return extensionscontroller.TryUpdateStatus(ctx, retry.DefaultBackoff, r.client, bb, func() error {
bb.Status.LastOperation = extensionscontroller.LastOperation(lastOperationType, gardencorev1beta1.LastOperationStateProcessing, 1, description)
return nil
})
}
func (r *reconciler) updateStatusError(ctx context.Context, err error, bb *extensionsv1alpha1.BackupBucket, lastOperationType gardencorev1beta1.LastOperationType, description string) error {
return extensionscontroller.TryUpdateStatus(ctx, retry.DefaultBackoff, r.client, bb, func() error {
bb.Status.ObservedGeneration = bb.Generation
bb.Status.LastOperation, bb.Status.LastError = extensionscontroller.ReconcileError(lastOperationType, gardencorev1beta1helper.FormatLastErrDescription(fmt.Errorf("%s: %v", description, err)), 50, gardencorev1beta1helper.ExtractErrorCodes(gardencorev1beta1helper.DetermineError(err, err.Error()))...)
return nil
})
}
func (r *reconciler) updateStatusSuccess(ctx context.Context, bb *extensionsv1alpha1.BackupBucket, lastOperationType gardencorev1beta1.LastOperationType, description string) error {
return extensionscontroller.TryUpdateStatus(ctx, retry.DefaultBackoff, r.client, bb, func() error {
bb.Status.ObservedGeneration = bb.Generation
bb.Status.LastOperation, bb.Status.LastError = extensionscontroller.ReconcileSucceeded(lastOperationType, description)
return nil
})
}