/
reconciler.go
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/
reconciler.go
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// Copyright (c) 2021 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 conditions
import (
"context"
"fmt"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"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"
v1beta1helper "github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
"github.com/gardener/gardener/pkg/controllermanager/apis/config"
kubernetesutils "github.com/gardener/gardener/pkg/utils/kubernetes"
)
// Reconciler reconciles Shoots registered as Seeds and maintains the Seeds conditions in the Shoot status.
type Reconciler struct {
Client client.Client
Config config.ShootConditionsControllerConfiguration
}
// Reconcile reconciles Shoots registered as Seeds and copies the Seed conditions to the Shoot object.
func (r *Reconciler) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
log := logf.FromContext(ctx)
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)
}
// Get the seed this shoot is registered as
seed, err := r.getShootSeed(ctx, shoot)
if err != nil {
return reconcile.Result{}, err
}
// Build new shoot conditions
// First remove all existing seed conditions and then add the current seed conditions
// if the shoot is still registered as seed
seedConditionTypes := []gardencorev1beta1.ConditionType{
gardencorev1beta1.SeedBackupBucketsReady,
gardencorev1beta1.SeedBootstrapped,
gardencorev1beta1.SeedExtensionsReady,
gardencorev1beta1.SeedGardenletReady,
gardencorev1beta1.SeedSystemComponentsHealthy,
}
conditions := v1beta1helper.RemoveConditions(shoot.Status.Conditions, seedConditionTypes...)
if seed != nil {
conditions = v1beta1helper.MergeConditions(conditions, seed.Status.Conditions...)
}
// Update the shoot conditions if needed
if v1beta1helper.ConditionsNeedUpdate(shoot.Status.Conditions, conditions) {
log.V(1).Info("Updating shoot conditions")
shoot.Status.Conditions = conditions
// We are using Update here to ensure that we act upon an up-to-date version of the shoot.
// An outdated cache together with a strategic merge patch can lead to incomplete patches if conditions change quickly.
if err := r.Client.Status().Update(ctx, shoot); err != nil {
return reconcile.Result{}, err
}
}
return reconcile.Result{}, nil
}
func (r *Reconciler) getShootSeed(ctx context.Context, shoot *gardencorev1beta1.Shoot) (*gardencorev1beta1.Seed, error) {
// Get the managed seed referencing this shoot
ms, err := kubernetesutils.GetManagedSeedWithReader(ctx, r.Client, shoot.Namespace, shoot.Name)
if err != nil || ms == nil {
return nil, err
}
// Get the seed registered by the managed seed
seed := &gardencorev1beta1.Seed{}
if err := r.Client.Get(ctx, kubernetesutils.Key(ms.Name), seed); err != nil {
return nil, client.IgnoreNotFound(err)
}
return seed, nil
}