generated from kubernetes/kubernetes-template-project
/
dws.go
139 lines (123 loc) · 5.26 KB
/
dws.go
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/*
Copyright 2021 The Kubernetes Authors.
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 persistentvolumeclaim
import (
"context"
"fmt"
corev1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/klog/v2"
"sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/syncer/constants"
"sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/syncer/conversion"
"sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/syncer/util"
"sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/util/reconciler"
)
func (c *controller) StartDWS(stopCh <-chan struct{}) error {
if !cache.WaitForCacheSync(stopCh, c.pvcSynced) {
return fmt.Errorf("failed to wait for caches to sync")
}
return c.MultiClusterController.Start(stopCh)
}
// The reconcile logic for tenant control plane pvc informer
func (c *controller) Reconcile(request reconciler.Request) (reconciler.Result, error) {
klog.V(4).Infof("reconcile pvc %s/%s event for cluster %s", request.Namespace, request.Name, request.ClusterName)
targetNamespace := conversion.ToSuperClusterNamespace(request.ClusterName, request.Namespace)
pPVC, err := c.pvcLister.PersistentVolumeClaims(targetNamespace).Get(request.Name)
pExists := true
if err != nil {
if !apierrors.IsNotFound(err) {
return reconciler.Result{Requeue: true}, err
}
pExists = false
}
vExists := true
vPVC := &corev1.PersistentVolumeClaim{}
if err := c.MultiClusterController.Get(request.ClusterName, request.Namespace, request.Name, vPVC); err != nil {
if !apierrors.IsNotFound(err) {
return reconciler.Result{Requeue: true}, err
}
vExists = false
}
switch {
case vExists && !pExists:
err := c.reconcilePVCCreate(request.ClusterName, targetNamespace, request.UID, vPVC)
if err != nil {
klog.Errorf("failed reconcile pvc %s/%s CREATE of cluster %s %v", request.Namespace, request.Name, request.ClusterName, err)
return reconciler.Result{Requeue: true}, err
}
case !vExists && pExists:
err := c.reconcilePVCRemove(request.ClusterName, targetNamespace, request.UID, request.Name, pPVC)
if err != nil {
klog.Errorf("failed reconcile pvc %s/%s DELETE of cluster %s %v", request.Namespace, request.Name, request.ClusterName, err)
return reconciler.Result{Requeue: true}, err
}
case vExists && pExists:
err := c.reconcilePVCUpdate(request.ClusterName, targetNamespace, request.UID, pPVC, vPVC)
if err != nil {
klog.Errorf("failed reconcile pvc %s/%s UPDATE of cluster %s %v", request.Namespace, request.Name, request.ClusterName, err)
return reconciler.Result{Requeue: true}, err
}
default:
// object is gone.
}
return reconciler.Result{}, nil
}
func (c *controller) reconcilePVCCreate(clusterName, targetNamespace, requestUID string, pvc *corev1.PersistentVolumeClaim) error {
newObj, err := c.Conversion().BuildSuperClusterObject(clusterName, pvc)
if err != nil {
return err
}
pPVC := newObj.(*corev1.PersistentVolumeClaim)
pPVC, err = c.pvcClient.PersistentVolumeClaims(targetNamespace).Create(context.TODO(), pPVC, metav1.CreateOptions{})
if apierrors.IsAlreadyExists(err) {
if pPVC.Annotations[constants.LabelUID] == requestUID {
klog.Infof("pvc %s/%s of cluster %s already exist in super control plane", targetNamespace, pPVC.Name, clusterName)
return nil
}
return fmt.Errorf("pPVC %s/%s exists but its delegated object UID is different", targetNamespace, pPVC.Name)
}
return err
}
func (c *controller) reconcilePVCUpdate(clusterName, targetNamespace, requestUID string, pPVC, vPVC *corev1.PersistentVolumeClaim) error {
if pPVC.Annotations[constants.LabelUID] != requestUID {
return fmt.Errorf("pPVC %s/%s delegated UID is different from updated object", targetNamespace, pPVC.Name)
}
vc, err := util.GetVirtualClusterObject(c.MultiClusterController, clusterName)
if err != nil {
return err
}
updatedPVC := conversion.Equality(c.Config, vc).CheckPVCEquality(pPVC, vPVC)
if updatedPVC != nil {
_, err = c.pvcClient.PersistentVolumeClaims(targetNamespace).Update(context.TODO(), updatedPVC, metav1.UpdateOptions{})
if err != nil {
return err
}
}
return nil
}
func (c *controller) reconcilePVCRemove(clusterName, targetNamespace, requestUID, name string, pPVC *corev1.PersistentVolumeClaim) error {
if pPVC.Annotations[constants.LabelUID] != requestUID {
return fmt.Errorf("to be deleted pPVC %s/%s delegated UID is different from deleted object", targetNamespace, pPVC.Name)
}
opts := &metav1.DeleteOptions{
PropagationPolicy: &constants.DefaultDeletionPolicy,
}
err := c.pvcClient.PersistentVolumeClaims(targetNamespace).Delete(context.TODO(), name, *opts)
if apierrors.IsNotFound(err) {
klog.Warningf("pvc %s/%s of cluster %s not found in super control plane", targetNamespace, name, clusterName)
return nil
}
return err
}