Kubernetes-集群Rook-Ceph快照

部署条件

• Rook officially supports v1 snapshots for Kubernetes v1.20+.
• Install the snapshot controller and snapshot v1 CRD as required. More info can be foundhere.

安装快照控制器和CRD：

安装快照 CRD：

git clone https://github.com/kubernetes-csi/external-snapshotter.git
kubectl kustomize /root/crd/external-snapshotter/client/config/crd |kubectl create -f -

安装快照控制器：

kubectl -n kube-system kustomize /root/crd/external-snapshotter/deploy/kubernetes/snapshot-controller | kubectl create -f

安装 CSI 驱动程序：

kubectl kustomize /root/crd/external-snapshotter/deploy/kubernetes/csi-snapshotter/ | kubectl create -f -

CephFS 快照:

拉取镜像

docker pull registry.k8s.io/sig-storage/csi-snapshotter:v6.3.1
docker pull registry.k8s.io/sig-storage/snapshot-controller:v6.3.1
docker pull registry.k8s.io/sig-storage/hostpathplugin:v1.11.0

创建卷快照类

kubectl create -f deploy/examples/csi/cephfs/snapshotclass.yaml

创建卷快照

1、在snapshot.yaml中，volumeSnapshotClassName应该是之前创建类名称

2、persistentVolumeClaimName是 CephFS CSI 驱动程序已创建的 PVC 的名称

kubectl create -f deploy/examples/csi/cephfs/snapshot.yaml

验证 CephFS 快照

READYTOUSE当的字段设置为 true时，快照将准备好恢复到新的 PVC volumesnapshot。

[root@master rook]# kubectl get volumesnapshotclass
NAME                         DRIVER                          DELETIONPOLICY   AGE
csi-cephfsplugin-snapclass   rook-ceph.cephfs.csi.ceph.com   Delete           39s

[root@master rook]# kubectl get volumesnapshot
NAME                  READYTOUSE   SOURCEPVC    SOURCESNAPSHOTCONTENT   RESTORESIZE   SNAPSHOTCLASS                SNAPSHOTCONTENT                                    CREATIONTIME   AGE
cephfs-pvc-snapshot   true         cephfs-pvc                           5Gi           csi-cephfsplugin-snapclass   snapcontent-79f5c87f-ddc1-4263-bfac-42efc9c0b261   40s            41s

将快照恢复到新的 PVC

1、从快照创建新的 PVC，把cephfs-pvc 恢复到cephfs-pvc-restore

2、dataSource: name: cephfs-pvc-snapshot（上一步创建的快照名称）

kubectl create -f deploy/examples/csi/cephfs/pvc-restore.yaml

验证 CephFS 恢复 PVC

[root@master rook]# kubectl get pvc
NAME                 STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
cephfs-pvc           Bound    pvc-adc20c44-9c74-4e28-81d1-a222014e3056   5Gi        RWO            rook-cephfs    22h
cephfs-pvc-restore   Bound    pvc-1cf36e3d-6fff-46d2-b2fb-f31f6d67e7d5   5Gi        RWX            rook-cephfs    63s

RBD 快照：

创建卷快照类

kubectl create -f deploy/examples/csi/rbd/snapshotclass.yaml

创建卷快照

1、上一步创建的类名称：volumeSnapshotClassName: csi-rbdplugin-snapclass 

2、备份的pvc名称source：persistentVolumeClaimName: rbd-pvc

    kubectl create -f deploy/examples/csi/rbd/snapshot.yaml

验证 RBD 快照创建

READYTOUSE当的字段设置为 true时，快照将准备好恢复到新的 PVC volumesnapshot。

$ kubectl get volumesnapshotclass
NAME                      DRIVER                       DELETIONPOLICY   AGE
csi-rbdplugin-snapclass   rook-ceph.rbd.csi.ceph.com   Delete           3h55m

$ kubectl get volumesnapshot
NAME               READYTOUSE   SOURCEPVC   SOURCESNAPSHOTCONTENT   RESTORESIZE   SNAPSHOTCLASS             SNAPSHOTCONTENT                                    CREATIONTIME   AGE
rbd-pvc-snapshot   true         rbd-pvc                             1Gi           csi-rbdplugin-snapclass   snapcontent-79090db0-7c66-4b18-bf4a-634772c7cac7   3h50m          3h51m

将快照恢复到新的 PVC

1、从快照创建新的 PVC，把rbd-pvc恢复到rbd-pvc-restore

kubectl create -f deploy/examples/csi/rbd/pvc-restore.yaml

验证 RBD 克隆 PVC 创建

$ kubectl get pvc
NAME              STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS          AGE
rbd-pvc           Bound    pvc-84294e34-577a-11e9-b34f-525400581048   1Gi        RWO            rook-ceph-block       34m
rbd-pvc-restore   Bound    pvc-575537bf-577f-11e9-b34f-525400581048   1Gi        RWO            rook-ceph-block       8s