/
seed_control.go
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/
seed_control.go
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// Copyright (c) 2020 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 controllerregistration
import (
"context"
"fmt"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
gardencorelisters "github.com/gardener/gardener/pkg/client/core/listers/core/v1beta1"
"github.com/gardener/gardener/pkg/client/kubernetes/clientmap"
"github.com/gardener/gardener/pkg/client/kubernetes/clientmap/keys"
"github.com/gardener/gardener/pkg/controllerutils"
"github.com/gardener/gardener/pkg/logger"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/client-go/tools/cache"
)
func (c *Controller) seedAdd(obj interface{}) {
key, err := cache.MetaNamespaceKeyFunc(obj)
if err != nil {
return
}
c.seedQueue.Add(key)
}
func (c *Controller) seedUpdate(oldObj, newObj interface{}) {
c.seedAdd(newObj)
}
func (c *Controller) seedDelete(obj interface{}) {
key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj)
if err != nil {
return
}
c.seedQueue.Add(key)
}
func (c *Controller) reconcileSeedKey(key string) error {
_, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
return err
}
seed, err := c.seedLister.Get(name)
if apierrors.IsNotFound(err) {
logger.Logger.Debugf("[CONTROLLERREGISTRATION SEED RECONCILE] %s - skipping because Seed has been deleted", key)
return nil
}
if err != nil {
logger.Logger.Infof("[CONTROLLERREGISTRATION SEED RECONCILE] %s - unable to retrieve object from store: %v", key, err)
return err
}
return c.seedControl.Reconcile(seed)
}
// SeedControlInterface implements the control logic for updating Seeds. It is implemented as an interface to allow
// for extensions that provide different semantics. Currently, there is only one implementation.
type SeedControlInterface interface {
Reconcile(*gardencorev1beta1.Seed) error
}
// NewDefaultSeedControl returns a new instance of the default implementation ControlInterface that
// implements the documented semantics for Seeds. You should use an instance returned from NewDefaultSeedControl()
// for any scenario other than testing.
func NewDefaultSeedControl(clientMap clientmap.ClientMap, controllerInstallationLister gardencorelisters.ControllerInstallationLister) SeedControlInterface {
return &defaultSeedControl{clientMap, controllerInstallationLister}
}
type defaultSeedControl struct {
clientMap clientmap.ClientMap
controllerInstallationLister gardencorelisters.ControllerInstallationLister
}
func (c *defaultSeedControl) Reconcile(obj *gardencorev1beta1.Seed) error {
var (
ctx = context.TODO()
seed = obj.DeepCopy()
)
gardenClient, err := c.clientMap.GetClient(ctx, keys.ForGarden())
if err != nil {
return fmt.Errorf("failed to get garden client: %w", err)
}
if seed.DeletionTimestamp != nil {
if !controllerutils.HasFinalizer(seed, FinalizerName) {
return nil
}
controllerInstallationList, err := c.controllerInstallationLister.List(labels.Everything())
if err != nil {
return err
}
for _, controllerInstallation := range controllerInstallationList {
if controllerInstallation.Spec.SeedRef.Name == seed.Name {
return fmt.Errorf("cannot remove finalizer of Seed %q because still found at least one ControllerInstallation", seed.Name)
}
}
return controllerutils.RemoveFinalizer(ctx, gardenClient.DirectClient(), seed, FinalizerName)
}
return controllerutils.EnsureFinalizer(ctx, gardenClient.Client(), seed, FinalizerName)
}