/
reconciler.go
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/
reconciler.go
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// Copyright 2018 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 quota
import (
"context"
"fmt"
"time"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/utils/clock"
"sigs.k8s.io/controller-runtime/pkg/client"
logf "sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
"github.com/gardener/gardener/pkg/controllermanager/apis/config"
"github.com/gardener/gardener/pkg/controllerutils"
gardenerutils "github.com/gardener/gardener/pkg/utils/gardener"
kubernetesutils "github.com/gardener/gardener/pkg/utils/kubernetes"
)
// Reconciler reconciles Shoots and auto-deletes them if they are bound to a Quota with a configured cluster lifetime.
type Reconciler struct {
Client client.Client
Config config.ShootQuotaControllerConfiguration
Clock clock.Clock
}
// Reconcile reconciles Shoots and auto-deletes them if they are bound to a Quota with a configured cluster lifetime.
func (r *Reconciler) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
log := logf.FromContext(ctx)
ctx, cancel := controllerutils.GetMainReconciliationContext(ctx, r.Config.SyncPeriod.Duration)
defer cancel()
shoot := &gardencorev1beta1.Shoot{}
if err := r.Client.Get(ctx, request.NamespacedName, shoot); 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)
}
var (
secretBinding = &gardencorev1beta1.SecretBinding{}
clusterLifeTime *int32
)
if shoot.Spec.SecretBindingName != nil {
if err := r.Client.Get(ctx, kubernetesutils.Key(shoot.Namespace, *shoot.Spec.SecretBindingName), secretBinding); err != nil {
return reconcile.Result{}, err
}
}
for _, quotaRef := range secretBinding.Quotas {
quota := &gardencorev1beta1.Quota{}
if err := r.Client.Get(ctx, kubernetesutils.Key(quotaRef.Namespace, quotaRef.Name), quota); err != nil {
return reconcile.Result{}, err
}
if quota.Spec.ClusterLifetimeDays == nil {
continue
}
if clusterLifeTime == nil || *quota.Spec.ClusterLifetimeDays < *clusterLifeTime {
clusterLifeTime = quota.Spec.ClusterLifetimeDays
}
}
// If the Shoot has no Quotas referenced (anymore) or if the referenced Quotas does not have a clusterLifetime,
// then we will not check for cluster lifetime expiration, even if the Shoot has a clusterLifetime timestamp already
// annotated.
if clusterLifeTime == nil {
if metav1.HasAnnotation(shoot.ObjectMeta, v1beta1constants.ShootExpirationTimestamp) {
log.Info("Removing expiration timestamp annotation")
patch := client.MergeFrom(shoot.DeepCopy())
delete(shoot.Annotations, v1beta1constants.ShootExpirationTimestamp)
if err := r.Client.Patch(ctx, shoot, patch); err != nil {
return reconcile.Result{}, err
}
}
return reconcile.Result{RequeueAfter: r.Config.SyncPeriod.Duration}, nil
}
expirationTime, exist := shoot.Annotations[v1beta1constants.ShootExpirationTimestamp]
if !exist {
expirationTime = shoot.CreationTimestamp.Add(time.Duration(*clusterLifeTime*24) * time.Hour).Format(time.RFC3339)
log.Info("Setting expiration timestamp annotation", "expirationTime", expirationTime)
patch := client.MergeFrom(shoot.DeepCopy())
metav1.SetMetaDataAnnotation(&shoot.ObjectMeta, v1beta1constants.ShootExpirationTimestamp, expirationTime)
if err := r.Client.Patch(ctx, shoot, patch); err != nil {
return reconcile.Result{}, err
}
}
expirationTimeParsed, err := time.Parse(time.RFC3339, expirationTime)
if err != nil {
return reconcile.Result{}, err
}
if r.Clock.Now().UTC().After(expirationTimeParsed.UTC()) {
log.Info("Shoot cluster lifetime expired, deleting Shoot", "expirationTime", expirationTime)
// We have to annotate the Shoot to confirm the deletion.
if err := gardenerutils.ConfirmDeletion(ctx, r.Client, shoot); err != nil {
if apierrors.IsNotFound(err) {
return reconcile.Result{}, nil
}
return reconcile.Result{}, err
}
// Now we are allowed to delete the Shoot (to set the deletionTimestamp).
return reconcile.Result{}, client.IgnoreNotFound(r.Client.Delete(ctx, shoot))
}
return reconcile.Result{RequeueAfter: r.Config.SyncPeriod.Duration}, nil
}