2020-08-10 07:22:50 +00:00
|
|
|
# Create CephFS snapshot and Clone Volume
|
|
|
|
|
|
|
|
|
|
- [Create CephFS snapshot and Clone Volume](#create-cephfs-snapshot-and-clone-volume)
|
|
|
|
|
- [Prerequisite](#prerequisite)
|
|
|
|
|
- [Snapshot](#snapshot)
|
|
|
|
|
- [Create snapshotclass](#create-snapshotclass)
|
|
|
|
|
- [Create snapshot](#create-snapshot)
|
|
|
|
|
- [Restore snapshot to a new PVC](#restore-snapshot-to-a-new-pvc)
|
|
|
|
|
- [Clone PVC](#clone-pvc)
|
|
|
|
|
|
|
|
|
|
## Prerequisite
|
|
|
|
|
|
|
|
|
|
- For snapshot functionality to be supported for your Kubernetes cluster, the
|
|
|
|
|
Kubernetes version running in your cluster should be >= v1.17. We also need the
|
|
|
|
|
`snapshot controller` deployed in your Kubernetes cluster along with `csi-snapshotter`
|
|
|
|
|
sidecar container.
|
|
|
|
|
Refer [external-snapshotter](https://github.com/kubernetes-csi/external-snapshotter/)
|
|
|
|
|
for more information on these sidecar controllers. There should
|
|
|
|
|
be a `volumesnapshotclass` object present in the cluster
|
|
|
|
|
for snapshot request to be satisified.
|
|
|
|
|
|
2020-08-13 10:42:29 +00:00
|
|
|
**NOTE: At present, there is a limit of 400 snapshots per cephFS filesystem.
|
|
|
|
|
Also PVC cannot be deleted if it's having snapshots. Make sure all the snapshots
|
|
|
|
|
on the PVC are deleted before you delete the PVC.**
|
|
|
|
|
|
2020-08-10 07:22:50 +00:00
|
|
|
## Snapshot
|
|
|
|
|
|
|
|
|
|
### Create snapshotclass
|
|
|
|
|
|
|
|
|
|
```console
|
|
|
|
|
kubectl create -f ../examples/cephfs/snapshotclass.yaml
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
### Create snapshot
|
|
|
|
|
|
|
|
|
|
The snapshot is created on/for an existing PVC. You should
|
|
|
|
|
have a PVC in bound state before creating snapshot from it.
|
|
|
|
|
please refer pvc creation [doc](https://github.com/ceph/ceph-csi/blob/master/docs/deploy-cephfs.md)
|
|
|
|
|
for more information on how to create a PVC.
|
|
|
|
|
|
|
|
|
|
```console
|
|
|
|
|
$ kubectl create -f ../examples/cephfs/snapshot.yaml
|
|
|
|
|
volumesnapshot.snapshot.storage.k8s.io/cephfs-pvc-snapshot created
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
- Get details about the snapshot
|
|
|
|
|
|
|
|
|
|
```console
|
|
|
|
|
$ kubectl get volumesnapshot
|
|
|
|
|
NAME READYTOUSE SOURCEPVC SOURCESNAPSHOTCONTENT RESTORESIZE SNAPSHOTCLASS SNAPSHOTCONTENT CREATIONTIME AGE
|
|
|
|
|
cephfs-pvc-snapshot true csi-cephfs-pvc 1Gi csi-cephfsplugin-snapclass snapcontent-34476204-a14a-4d59-bfbc-2bbba695652c 3s 6s
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
- Get details about the volumesnapshotcontent
|
|
|
|
|
|
|
|
|
|
```console
|
|
|
|
|
$ kubectl get volumesnapshotcontent
|
|
|
|
|
NAME READYTOUSE RESTORESIZE DELETIONPOLICY DRIVER VOLUMESNAPSHOTCLASS VOLUMESNAPSHOT AGE
|
|
|
|
|
snapcontent-34476204-a14a-4d59-bfbc-2bbba695652c true 1073741824 Delete cephfs.csi.ceph.com csi-cephfsplugin-snapclass cephfs-pvc-snapshot 64s
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
## Restore snapshot to a new PVC
|
|
|
|
|
|
|
|
|
|
```console
|
|
|
|
|
|
|
|
|
|
$ kubectl create -f ../examples/cephfs/pvc-restore.yaml
|
|
|
|
|
$ kubectl get pvc
|
|
|
|
|
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
|
|
|
|
|
csi-cephfs-pvc Bound pvc-1ea51547-a88b-4ab0-8b4a-812caeaf025d 1Gi RWX csi-cephfs-sc 20h
|
|
|
|
|
cephfs-pvc-restore Bound pvc-95308c75-6c93-4928-a551-6b5137192209 1Gi RWX csi-cephfs-sc 11m
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
## Clone PVC
|
|
|
|
|
|
|
|
|
|
```console
|
|
|
|
|
$ kubectl create -f ../examples/cephfs/pvc-clone.yaml
|
|
|
|
|
$ kubectl get pvc
|
|
|
|
|
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
|
|
|
|
|
csi-cephfs-pvc Bound pvc-1ea51547-a88b-4ab0-8b4a-812caeaf025d 1Gi RWX csi-cephfs-sc 20h
|
|
|
|
|
cephfs-pvc-clone Bound pvc-b575bc35-d521-4c41-b4f9-1d733cd28fdf 1Gi RWX csi-cephfs-sc 39s
|
|
|
|
|
cephfs-pvc-restore Bound pvc-95308c75-6c93-4928-a551-6b5137192209 1Gi RWX csi-cephfs-sc 55m
|
|
|
|
|
```
|
