CBS类型PVC回收策略

StorageClass回收策略是reclaimPolicy: Delete

1，静态创建PV， 不指定StorageClass

apiVersion: v1
kind: PersistentVolume
Metadata:
  name: cbs-pv
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 10Gi
  csi:
    driver: com.tencent.cloud.csi.cbs
    volumeHandle: disk-h2v5jzxy
  persistentVolumeReclaimPolicy: Retain
  volumeMode: Filesystem

创建PVC时候，也需要不指定 StorageClass 才能选择到这个pv，如果使用指定了会无法选择这个pv（提示是： 当前PersistentVolume与PersistentVolumeClaim所指定的StorageClass不一致 ）

apiVersion: v1
kind: PersistentVolumeClaim
Metadata:
  name: cbs-pvc
  namespace: default
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
  storageClassName: ""
  volumeMode: Filesystem
  volumeName: cbs-pv
  

删除PVC和PV时候，对应的CBS盘不会回收删除

2，静态创建PV， 指定StorageClass

apiVersion: v1
kind: PersistentVolume
Metadata:
  name: cbs-pv
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 10Gi
  csi:
    driver: com.tencent.cloud.csi.cbs
    volumeHandle: disk-h2v5jzxy
  persistentVolumeReclaimPolicy: Retain
  storageClassName: cbs
  volumeMode: Filesystem

创建PVC，需要选择对应的storageclass

apiVersion: v1
kind: PersistentVolumeClaim
Metadata:
  name: cbs-pvc
  namespace: default
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
  storageClassName: cbs
  volumeMode: Filesystem
  volumeName: cbs-pv

模拟创建一定大小文件 ： dd if=/dev/zero of=hello.txt bs=100M count=1 删除PVC和PV时候，对应的CBS盘不会回收删除

3，动态创建pvc ，不指定pv，会自动创建pv

apiVersion: v1
kind: PersistentVolumeClaim
Metadata:
  name: cbs-pvc
  namespace: default
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
  storageClassName: cbs

注意：由于cbs 回收策略 是 Delete ，所以删除pvc时候，对应的PV和CBS盘也会自动删除

StorageClass回收策略是reclaimPolicy: Retain

4，动态创建PVC，保留策略

1）创建reclaimPolicy: Retain 类型的storgeclass 和PVC

apiVersion: storage.k8s.io/v1
kind: StorageClass
Metadata:
  name: cbs-retain
parameters:
  diskChargeType: POSTPAID_BY_HOUR
  diskType: CLOUD_PREMIUM
provisioner: com.tencent.cloud.csi.cbs
reclaimPolicy: Retain
volumeBindingMode: Immediate
allowVolumeExpansion: true

---
apiVersion: v1
kind: PersistentVolumeClaim
Metadata:
  name: cbs-pvc
  namespace: default
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
  storageClassName: cbs-retain
  volumeMode: Filesystem

2）然后删除对应的PVC，而对应的PV并没有删除，PV状态是 Released

[root@VM-249-33-tlinux ~]# kubectl   get pv,pvc
NAME                                                        CAPACITY   ACCESS MODES   RECLaim POLICY   STATUS     CLaim             STORAGECLASS   REASON   AGE
persistentvolume/pvc-ae7a89e4-3a3c-4f87-b0c9-fffaf91559d2   10Gi       RWO            Retain           Released   default/cbs-pvc   cbs-retain              2m47s

3）单独删除PV时候，对应的CBS盘也是不会删除的

[root@VM-249-33-tlinux ~]# kubectl  delete pv pvc-ae7a89e4-3a3c-4f87-b0c9-fffaf91559d2
persistentvolume "pvc-ae7a89e4-3a3c-4f87-b0c9-fffaf91559d2" deleted

图片.png

4）修改对应的PV配置，删除spec.claimRef部分，对应PV可以和其他pvc绑定

图片.png