/
controllerregistration_control.go
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/
controllerregistration_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"
"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) controllerRegistrationAdd(obj interface{}) {
key, err := cache.MetaNamespaceKeyFunc(obj)
if err != nil {
logger.Logger.Errorf("Couldn't get key for object %+v: %v", obj, err)
return
}
c.controllerRegistrationQueue.Add(key)
seedList, err := c.seedLister.List(labels.Everything())
if err != nil {
logger.Logger.Errorf("error listing seeds: %+v", err)
return
}
for _, seed := range seedList {
c.controllerRegistrationSeedQueue.Add(seed.Name)
}
}
func (c *Controller) controllerRegistrationUpdate(oldObj, newObj interface{}) {
c.controllerRegistrationAdd(newObj)
}
func (c *Controller) controllerRegistrationDelete(obj interface{}) {
key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj)
if err != nil {
logger.Logger.Errorf("Couldn't get key for object %+v: %v", obj, err)
return
}
c.controllerRegistrationQueue.Add(key)
}
func (c *Controller) reconcileControllerRegistrationKey(key string) error {
_, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
return err
}
controllerRegistration, err := c.controllerRegistrationLister.Get(name)
if apierrors.IsNotFound(err) {
logger.Logger.Debugf("[CONTROLLERREGISTRATION RECONCILE] %s - skipping because ControllerRegistration has been deleted", key)
return nil
}
if err != nil {
logger.Logger.Infof("[CONTROLLERREGISTRATION RECONCILE] %s - unable to retrieve object from store: %v", key, err)
return err
}
return c.controllerRegistrationControl.Reconcile(controllerRegistration)
}
// ControlInterface implements the control logic for updating ControllerRegistrations. It is implemented as an interface to allow
// for extensions that provide different semantics. Currently, there is only one implementation.
type ControlInterface interface {
Reconcile(*gardencorev1beta1.ControllerRegistration) error
}
// NewDefaultControllerRegistrationControl returns a new instance of the default implementation ControlInterface that
// implements the documented semantics for ControllerRegistrations. You should use an instance returned from NewDefaultControllerRegistrationControl()
// for any scenario other than testing.
func NewDefaultControllerRegistrationControl(k8sGardenClient kubernetes.Interface, controllerInstallationLister gardencorelisters.ControllerInstallationLister) ControlInterface {
return &defaultControllerRegistrationControl{k8sGardenClient, controllerInstallationLister}
}
type defaultControllerRegistrationControl struct {
k8sGardenClient kubernetes.Interface
controllerInstallationLister gardencorelisters.ControllerInstallationLister
}
func (c *defaultControllerRegistrationControl) Reconcile(obj *gardencorev1beta1.ControllerRegistration) error {
var (
ctx = context.TODO()
controllerRegistration = obj.DeepCopy()
)
if controllerRegistration.DeletionTimestamp != nil {
if !controllerutils.HasFinalizer(controllerRegistration, FinalizerName) {
return nil
}
controllerInstallationList, err := c.controllerInstallationLister.List(labels.Everything())
if err != nil {
return err
}
for _, controllerInstallation := range controllerInstallationList {
if controllerInstallation.Spec.RegistrationRef.Name == controllerRegistration.Name {
return fmt.Errorf("cannot remove finalizer of ControllerRegistration %q because still found at least one ControllerInstallation", controllerRegistration.Name)
}
}
return controllerutils.RemoveFinalizer(ctx, c.k8sGardenClient.Client(), controllerRegistration, FinalizerName)
}
return controllerutils.EnsureFinalizer(ctx, c.k8sGardenClient.Client(), controllerRegistration, FinalizerName)
}