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reconciler.go
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/
reconciler.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 bastion
import (
"context"
"fmt"
"github.com/go-logr/logr"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/util/validation/field"
"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/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
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"
"github.com/gardener/gardener/pkg/extensions"
kubernetesutils "github.com/gardener/gardener/pkg/utils/kubernetes"
)
type reconciler struct {
actuator Actuator
configValidator ConfigValidator
client client.Client
reader client.Reader
statusUpdater extensionscontroller.StatusUpdater
}
// NewReconciler creates a new reconcile.Reconciler that reconciles
// bastion resources of Gardener's `extensions.gardener.cloud` API group.
func NewReconciler(mgr manager.Manager, actuator Actuator, configValidator ConfigValidator) reconcile.Reconciler {
return reconcilerutils.OperationAnnotationWrapper(
mgr,
func() client.Object { return &extensionsv1alpha1.Bastion{} },
&reconciler{
actuator: actuator,
configValidator: configValidator,
client: mgr.GetClient(),
reader: mgr.GetAPIReader(),
statusUpdater: extensionscontroller.NewStatusUpdater(mgr.GetClient()),
},
)
}
func (r *reconciler) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
log := logf.FromContext(ctx)
bastion := &extensionsv1alpha1.Bastion{}
if err := r.client.Get(ctx, request.NamespacedName, bastion); 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, bastion.Namespace)
if err != nil {
return reconcile.Result{}, err
}
operationType := v1beta1helper.ComputeOperationType(bastion.ObjectMeta, bastion.Status.LastOperation)
switch {
case bastion.DeletionTimestamp != nil:
return r.delete(ctx, log, bastion, cluster)
default:
return r.reconcile(ctx, log, bastion, cluster, operationType)
}
}
func (r *reconciler) reconcile(
ctx context.Context,
log logr.Logger,
bastion *extensionsv1alpha1.Bastion,
cluster *extensionscontroller.Cluster,
operationType gardencorev1beta1.LastOperationType,
) (
reconcile.Result,
error,
) {
if !controllerutil.ContainsFinalizer(bastion, FinalizerName) {
log.Info("Adding finalizer")
if err := controllerutils.AddFinalizers(ctx, r.client, bastion, FinalizerName); err != nil {
return reconcile.Result{}, fmt.Errorf("failed to add finalizer: %w", err)
}
}
if err := r.statusUpdater.Processing(ctx, log, bastion, operationType, "Reconciling the Bastion"); err != nil {
return reconcile.Result{}, err
}
if err := r.validateConfig(ctx, bastion, cluster); err != nil {
_ = r.statusUpdater.Error(ctx, log, bastion, err, operationType, "Error checking bastion config")
return reconcile.Result{}, err
}
log.Info("Starting the reconciliation of Bastion")
if err := r.actuator.Reconcile(ctx, log, bastion, cluster); err != nil {
_ = r.statusUpdater.Error(ctx, log, bastion, reconcilerutils.ReconcileErrCauseOrErr(err), operationType, "Error reconciling Bastion")
return reconcilerutils.ReconcileErr(err)
}
if err := r.statusUpdater.Success(ctx, log, bastion, operationType, "Successfully reconciled Bastion"); err != nil {
return reconcile.Result{}, err
}
return reconcile.Result{}, nil
}
func (r *reconciler) delete(
ctx context.Context,
log logr.Logger,
bastion *extensionsv1alpha1.Bastion,
cluster *extensionscontroller.Cluster,
) (
reconcile.Result,
error,
) {
if !controllerutil.ContainsFinalizer(bastion, FinalizerName) {
log.Info("Deleting Bastion causes a no-op as there is no finalizer")
return reconcile.Result{}, nil
}
operationType := v1beta1helper.ComputeOperationType(bastion.ObjectMeta, bastion.Status.LastOperation)
if err := r.statusUpdater.Processing(ctx, log, bastion, operationType, "Deleting the Bastion"); err != nil {
return reconcile.Result{}, err
}
log.Info("Starting the deletion of Bastion")
var err error
if kubernetesutils.HasMetaDataAnnotation(&bastion.ObjectMeta, v1beta1constants.AnnotationConfirmationForceDeletion, "true") {
err = r.actuator.ForceDelete(ctx, log, bastion, cluster)
} else {
err = r.actuator.Delete(ctx, log, bastion, cluster)
}
if err != nil {
_ = r.statusUpdater.Error(ctx, log, bastion, reconcilerutils.ReconcileErrCauseOrErr(err), operationType, "Error deleting Bastion")
return reconcilerutils.ReconcileErr(err)
}
if err := r.statusUpdater.Success(ctx, log, bastion, operationType, "Successfully reconciled Bastion"); err != nil {
return reconcile.Result{}, err
}
if controllerutil.ContainsFinalizer(bastion, FinalizerName) {
log.Info("Removing finalizer")
if err := controllerutils.RemoveFinalizers(ctx, r.client, bastion, FinalizerName); err != nil {
return reconcile.Result{}, fmt.Errorf("failed to remove finalizer: %w", err)
}
}
return reconcile.Result{}, nil
}
func (r *reconciler) validateConfig(ctx context.Context, bastion *extensionsv1alpha1.Bastion, cluster *extensions.Cluster) error {
if r.configValidator == nil {
return nil
}
if allErrs := r.configValidator.Validate(ctx, bastion, cluster); len(allErrs) > 0 {
if filteredErrs := allErrs.Filter(field.NewErrorTypeMatcher(field.ErrorTypeInternal)); len(filteredErrs) < len(allErrs) {
return allErrs.ToAggregate()
}
return v1beta1helper.NewErrorWithCodes(allErrs.ToAggregate(), gardencorev1beta1.ErrorConfigurationProblem)
}
return nil
}