/
pvcr_manager.go
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/
pvcr_manager.go
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/*
* Tencent is pleased to support the open source community by making TKEStack available.
*
* Copyright (C) 2012-2019 Tencent. All Rights Reserved.
*
* 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
*
* https://opensource.org/licenses/Apache-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 OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package manager
import (
storagev1alpha1 "tkestack.io/volume-decorator/pkg/apis/storage/v1"
clientset "tkestack.io/volume-decorator/pkg/generated/clientset/versioned"
pvcrlisters "tkestack.io/volume-decorator/pkg/generated/listers/storage/v1"
"tkestack.io/volume-decorator/pkg/volume"
corev1 "k8s.io/api/core/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/wait"
coreinformers "k8s.io/client-go/informers/core/v1"
corelisters "k8s.io/client-go/listers/core/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/workqueue"
"k8s.io/klog"
)
// pvcrManager is responsible for creating PVC runtime and update PVC/PV's status.
type pvcrManager struct {
volumeManager volume.Manager
pvcLister corelisters.PersistentVolumeClaimLister
pvcrClient clientset.Interface
pvcrLister pvcrlisters.PersistentVolumeClaimRuntimeLister
queue workqueue.RateLimitingInterface
}
// newPVCRManager creates a pvcrManager.
func newPVCRManager(
volumeManager volume.Manager,
pvcLister corelisters.PersistentVolumeClaimLister,
pvcrClient clientset.Interface,
pvcrLister pvcrlisters.PersistentVolumeClaimRuntimeLister,
pvcInformer coreinformers.PersistentVolumeClaimInformer) *pvcrManager {
queue := workqueue.NewNamedRateLimitingQueue(
workqueue.DefaultControllerRateLimiter(), "status_updater")
u := &pvcrManager{
volumeManager: volumeManager,
pvcLister: pvcLister,
pvcrClient: pvcrClient,
pvcrLister: pvcrLister,
queue: queue,
}
pvcInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: u.pvcAdd,
UpdateFunc: u.pvcUpdate,
})
return u
}
// Run starts the pvcrManager.
func (u *pvcrManager) Run(workers int, stopCh <-chan struct{}) {
for i := 0; i < workers; i++ {
go wait.Until(u.syncPVCs, 0, stopCh)
}
klog.Infof("PVC runtime manager started")
}
// pvcAdd adds a PVCR.
func (u *pvcrManager) pvcAdd(obj interface{}) {
objKey, err := getPVCKey(obj)
if err != nil {
return
}
u.queue.Add(objKey)
}
// pvcUpdate updates a PVCR.
func (u *pvcrManager) pvcUpdate(oldObj, newObj interface{}) {
u.pvcAdd(newObj)
}
// syncPVCs sync the PVC and PVCR objects.
func (u *pvcrManager) syncPVCs() {
key, quit := u.queue.Get()
if quit {
return
}
defer u.queue.Done(key)
if err := u.syncPVC(key.(string)); err != nil {
// Put PVC back to the queue so that we can retry later.
u.queue.AddRateLimited(key)
} else {
u.queue.Forget(key)
}
}
// syncPVCs sync a PVC and PVCR object.
func (u *pvcrManager) syncPVC(key string) error {
klog.V(4).Infof("Started PVC processing %q", key)
namespace, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
klog.Errorf("Split meta namespace key of pvc %s failed: %v", key, err)
return err
}
pvc, err := u.pvcLister.PersistentVolumeClaims(namespace).Get(name)
if err != nil {
if k8serrors.IsNotFound(err) {
klog.Infof("PVC %s deleted, skip it", key)
return nil
}
klog.Errorf("Get PVC %s failed: %v", key, err)
return err
}
pvcr, err := u.pvcrLister.PersistentVolumeClaimRuntimes(namespace).Get(name)
if err != nil {
if k8serrors.IsNotFound(err) {
return u.createPVCR(pvc)
}
klog.Errorf("Get PVC runtime %s failed: %v", key, err)
return err
}
return u.updatePVCR(pvc, pvcr)
}
// createPVCR creates a PVCR.
func (u *pvcrManager) createPVCR(pvc *corev1.PersistentVolumeClaim) error {
statuses, err := u.volumeManager.Status(pvc.Namespace, pvc.Name)
if err != nil {
klog.Errorf("Get status of PVC %s/%s failed: %v", pvc.Namespace, pvc.Name, err)
return err
}
pvcr := &storagev1alpha1.PersistentVolumeClaimRuntime{
ObjectMeta: metav1.ObjectMeta{
Name: pvc.Name,
Namespace: pvc.Namespace,
OwnerReferences: []metav1.OwnerReference{
{
APIVersion: "v1",
Kind: "PersistentVolumeClaim",
Name: pvc.Name,
UID: pvc.UID,
},
},
},
Spec: storagev1alpha1.PersistentVolumeClaimRuntimeSpec{
Statuses: statuses,
},
}
_, err = u.pvcrClient.StorageV1().PersistentVolumeClaimRuntimes(pvcr.Namespace).Create(pvcr)
if err != nil {
klog.Errorf("Create PVC runtime %s/%s failed: %v", pvcr.Namespace, pvcr.Name, err)
}
return err
}
// updatePVCR updates a PVCR.
func (u *pvcrManager) updatePVCR(
pvc *corev1.PersistentVolumeClaim,
pvcr *storagev1alpha1.PersistentVolumeClaimRuntime) error {
statuses, err := u.volumeManager.Status(pvc.Namespace, pvc.Name)
if err != nil {
klog.Errorf("Get status of PVC %s/%s failed: %v", pvc.Namespace, pvc.Name, err)
return err
}
newPVCR := pvcr.DeepCopy()
newPVCR.Spec.Statuses = statuses
_, err = u.pvcrClient.StorageV1().PersistentVolumeClaimRuntimes(pvcr.Namespace).Update(newPVCR)
if err != nil {
klog.Errorf("Update PVC runtime %s/%s failed: %v", pvcr.Namespace, pvcr.Name, err)
}
return err
}
// getPVCKey generates a unique key for a PVC object.
func getPVCKey(obj interface{}) (string, error) {
if unknown, ok := obj.(cache.DeletedFinalStateUnknown); ok && unknown.Obj != nil {
obj = unknown.Obj
}
objKey, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj)
if err != nil {
klog.Errorf("Failed to get key from object: %v", err)
return "", err
}
return objKey, nil
}