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reconciler.go
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reconciler.go
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// Copyright 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 controlplane
import (
"context"
"fmt"
"time"
"github.com/go-logr/logr"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
logf "sigs.k8s.io/controller-runtime/pkg/log"
"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"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
v1beta1helper "github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/controllerutils"
reconcilerutils "github.com/gardener/gardener/pkg/controllerutils/reconciler"
)
// RequeueAfter is the duration to requeue a controlplane reconciliation if indicated by the actuator.
const RequeueAfter = 2 * time.Second
type reconciler struct {
actuator Actuator
client client.Client
reader client.Reader
statusUpdater extensionscontroller.StatusUpdater
}
// NewReconciler creates a new reconcile.Reconciler that reconciles
// controlplane resources of Gardener's `extensions.gardener.cloud` API group.
func NewReconciler(actuator Actuator) reconcile.Reconciler {
return reconcilerutils.OperationAnnotationWrapper(
func() client.Object { return &extensionsv1alpha1.ControlPlane{} },
&reconciler{
actuator: actuator,
statusUpdater: extensionscontroller.NewStatusUpdater(),
},
)
}
func (r *reconciler) InjectFunc(f inject.Func) error {
return f(r.actuator)
}
func (r *reconciler) InjectClient(client client.Client) error {
r.client = client
r.statusUpdater.InjectClient(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) {
log := logf.FromContext(ctx)
cp := &extensionsv1alpha1.ControlPlane{}
if err := r.client.Get(ctx, request.NamespacedName, cp); err != nil {
if apierrors.IsNotFound(err) {
log.V(1).Info("Object is gone, stop reconciling")
return reconcile.Result{}, nil
}
return reconcile.Result{}, fmt.Errorf("error retrieving object from store: %w", err)
}
cluster, err := extensionscontroller.GetCluster(ctx, r.client, cp.Namespace)
if err != nil {
return reconcile.Result{}, err
}
if extensionscontroller.IsFailed(cluster) {
log.Info("Skipping the reconciliation of ControlPlane of failed shoot")
return reconcile.Result{}, nil
}
operationType := v1beta1helper.ComputeOperationType(cp.ObjectMeta, cp.Status.LastOperation)
switch {
case extensionscontroller.ShouldSkipOperation(operationType, cp):
return reconcile.Result{}, nil
case operationType == gardencorev1beta1.LastOperationTypeMigrate:
return r.migrate(ctx, log, cp, cluster)
case cp.DeletionTimestamp != nil:
return r.delete(ctx, log, cp, cluster)
case operationType == gardencorev1beta1.LastOperationTypeRestore:
return r.restore(ctx, log, cp, cluster)
default:
return r.reconcile(ctx, log, cp, cluster, operationType)
}
}
func (r *reconciler) reconcile(
ctx context.Context,
log logr.Logger,
cp *extensionsv1alpha1.ControlPlane,
cluster *extensionscontroller.Cluster,
operationType gardencorev1beta1.LastOperationType,
) (
reconcile.Result,
error,
) {
if !controllerutil.ContainsFinalizer(cp, FinalizerName) {
log.Info("Adding finalizer")
if err := controllerutils.AddFinalizers(ctx, r.client, cp, FinalizerName); err != nil {
return reconcile.Result{}, fmt.Errorf("failed to add finalizer: %w", err)
}
}
if err := r.statusUpdater.Processing(ctx, log, cp, operationType, "Reconciling the ControlPlane"); err != nil {
return reconcile.Result{}, err
}
log.Info("Starting the reconciliation of ControlPlane")
requeue, err := r.actuator.Reconcile(ctx, log, cp, cluster)
if err != nil {
_ = r.statusUpdater.Error(ctx, log, cp, reconcilerutils.ReconcileErrCauseOrErr(err), operationType, "Error reconciling ControlPlane")
return reconcilerutils.ReconcileErr(err)
}
if err := r.statusUpdater.Success(ctx, log, cp, operationType, "Successfully reconciled ControlPlane"); err != nil {
return reconcile.Result{}, err
}
if requeue {
return reconcile.Result{RequeueAfter: RequeueAfter}, nil
}
return reconcile.Result{}, nil
}
func (r *reconciler) restore(
ctx context.Context,
log logr.Logger,
cp *extensionsv1alpha1.ControlPlane,
cluster *extensionscontroller.Cluster,
) (
reconcile.Result,
error,
) {
if !controllerutil.ContainsFinalizer(cp, FinalizerName) {
log.Info("Adding finalizer")
if err := controllerutils.AddFinalizers(ctx, r.client, cp, FinalizerName); err != nil {
return reconcile.Result{}, fmt.Errorf("failed to add finalizer: %w", err)
}
}
if err := r.statusUpdater.Processing(ctx, log, cp, gardencorev1beta1.LastOperationTypeRestore, "Restoring the ControlPlane"); err != nil {
return reconcile.Result{}, err
}
log.Info("Starting the restoration of ControlPlane")
requeue, err := r.actuator.Restore(ctx, log, cp, cluster)
if err != nil {
_ = r.statusUpdater.Error(ctx, log, cp, reconcilerutils.ReconcileErrCauseOrErr(err), gardencorev1beta1.LastOperationTypeRestore, "Error restoring ControlPlane")
return reconcilerutils.ReconcileErr(err)
}
if err := r.statusUpdater.Success(ctx, log, cp, gardencorev1beta1.LastOperationTypeRestore, "Successfully restored ControlPlane"); err != nil {
return reconcile.Result{}, err
}
if requeue {
return reconcile.Result{RequeueAfter: RequeueAfter}, nil
}
if err := extensionscontroller.RemoveAnnotation(ctx, r.client, cp, v1beta1constants.GardenerOperation); err != nil {
return reconcile.Result{}, fmt.Errorf("error removing annotation from ControlPlane: %+v", err)
}
return reconcile.Result{}, nil
}
func (r *reconciler) migrate(
ctx context.Context,
log logr.Logger,
cp *extensionsv1alpha1.ControlPlane,
cluster *extensionscontroller.Cluster,
) (
reconcile.Result,
error,
) {
if err := r.statusUpdater.Processing(ctx, log, cp, gardencorev1beta1.LastOperationTypeMigrate, "Migrating the ControlPlane"); err != nil {
return reconcile.Result{}, err
}
log.Info("Starting the migration of ControlPlane")
if err := r.actuator.Migrate(ctx, log, cp, cluster); err != nil {
_ = r.statusUpdater.Error(ctx, log, cp, reconcilerutils.ReconcileErrCauseOrErr(err), gardencorev1beta1.LastOperationTypeMigrate, "Error migrating ControlPlane")
return reconcilerutils.ReconcileErr(err)
}
if err := r.statusUpdater.Success(ctx, log, cp, gardencorev1beta1.LastOperationTypeMigrate, "Successfully migrated ControlPlane"); err != nil {
return reconcile.Result{}, err
}
log.Info("Removing all finalizers")
if err := controllerutils.RemoveAllFinalizers(ctx, r.client, cp); err != nil {
return reconcile.Result{}, fmt.Errorf("error removing finalizers: %w", err)
}
if err := extensionscontroller.RemoveAnnotation(ctx, r.client, cp, v1beta1constants.GardenerOperation); err != nil {
return reconcile.Result{}, fmt.Errorf("error removing annotation from ControlPlane: %+v", err)
}
return reconcile.Result{}, nil
}
func (r *reconciler) delete(
ctx context.Context,
log logr.Logger,
cp *extensionsv1alpha1.ControlPlane,
cluster *extensionscontroller.Cluster,
) (
reconcile.Result,
error,
) {
if !controllerutil.ContainsFinalizer(cp, FinalizerName) {
log.Info("Deleting ControlPlane causes a no-op as there is no finalizer")
return reconcile.Result{}, nil
}
operationType := v1beta1helper.ComputeOperationType(cp.ObjectMeta, cp.Status.LastOperation)
if err := r.statusUpdater.Processing(ctx, log, cp, operationType, "Deleting the ControlPlane"); err != nil {
return reconcile.Result{}, err
}
log.Info("Starting the deletion of ControlPlane")
if err := r.actuator.Delete(ctx, log, cp, cluster); err != nil {
_ = r.statusUpdater.Error(ctx, log, cp, reconcilerutils.ReconcileErrCauseOrErr(err), operationType, "Error deleting ControlPlane")
return reconcilerutils.ReconcileErr(err)
}
if err := r.statusUpdater.Success(ctx, log, cp, operationType, "Successfully deleted ControlPlane"); err != nil {
return reconcile.Result{}, err
}
if controllerutil.ContainsFinalizer(cp, FinalizerName) {
log.Info("Removing finalizer")
if err := controllerutils.RemoveFinalizers(ctx, r.client, cp, FinalizerName); err != nil {
return reconcile.Result{}, fmt.Errorf("failed to remove finalizer: %w", err)
}
}
return reconcile.Result{}, nil
}