zfs-localpv/deploy/sample/zfsclone.yaml

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: zfspv-clone
spec:
  storageClassName: openebs-zfspv
  dataSource:
    name: zfspv-snap
    kind: VolumeSnapshot
    apiGroup: snapshot.storage.k8s.io
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 4Gi
feat(zfspv): adding snapshot and clone support for ZFSPV (#39) This commits support snapshot and clone commands via CSI driver. User can create snap and clone using the following steps. Note: - Snapshot is created via reconciliation CR - Cloned volume will be on the same zpool where the snapshot is taken - Cloned volume will have same properties as source volume. ----------------------------------- Create a Snapshotclass ``` kind: VolumeSnapshotClass apiVersion: snapshot.storage.k8s.io/v1beta1 metadata: name: zfspv-snapclass annotations: snapshot.storage.kubernetes.io/is-default-class: "true" driver: zfs.csi.openebs.io deletionPolicy: Delete ``` Once snapshotclass is created, we can use this class to create a Snapshot ``` apiVersion: snapshot.storage.k8s.io/v1beta1 kind: VolumeSnapshot metadata: name: zfspv-snap spec: volumeSnapshotClassName: zfspv-snapclass source: persistentVolumeClaimName: csi-zfspv ``` ``` $ kubectl get volumesnapshot NAME AGE zfspv-snap 7m52s ``` ``` $ kubectl get volumesnapshot -o yaml apiVersion: v1 items: - apiVersion: snapshot.storage.k8s.io/v1beta1 kind: VolumeSnapshot metadata: annotations: kubectl.kubernetes.io/last-applied-configuration: \| {"apiVersion":"snapshot.storage.k8s.io/v1beta1","kind":"VolumeSnapshot","metadata":{"annotations":{},"name":"zfspv-snap","namespace":"default"},"spec":{"source":{"persistentVolumeClaimName":"csi-zfspv"},"volumeSnapshotClassName":"zfspv-snapclass"}} creationTimestamp: "2020-01-30T10:31:24Z" finalizers: - snapshot.storage.kubernetes.io/volumesnapshot-as-source-protection - snapshot.storage.kubernetes.io/volumesnapshot-bound-protection generation: 1 name: zfspv-snap namespace: default resourceVersion: "30040" selfLink: /apis/snapshot.storage.k8s.io/v1beta1/namespaces/default/volumesnapshots/zfspv-snap uid: 1a5cf166-c599-4f58-9f3c-f1148be47fca spec: source: persistentVolumeClaimName: csi-zfspv volumeSnapshotClassName: zfspv-snapclass status: boundVolumeSnapshotContentName: snapcontent-1a5cf166-c599-4f58-9f3c-f1148be47fca creationTime: "2020-01-30T10:31:24Z" readyToUse: true restoreSize: "0" kind: List metadata: resourceVersion: "" selfLink: "" ``` Openebs resource for the created snapshot ``` $ kubectl get snap -n openebs -o yaml apiVersion: v1 items: - apiVersion: openebs.io/v1alpha1 kind: ZFSSnapshot metadata: creationTimestamp: "2020-01-30T10:31:24Z" finalizers: - zfs.openebs.io/finalizer generation: 2 labels: kubernetes.io/nodename: pawan-2 openebs.io/persistent-volume: pvc-18cab7c3-ec5e-4264-8507-e6f7df4c789a name: snapshot-1a5cf166-c599-4f58-9f3c-f1148be47fca namespace: openebs resourceVersion: "30035" selfLink: /apis/openebs.io/v1alpha1/namespaces/openebs/zfssnapshots/snapshot-1a5cf166-c599-4f58-9f3c-f1148be47fca uid: e29d571c-42b5-4fb7-9110-e1cfc9b96641 spec: capacity: "4294967296" fsType: zfs ownerNodeID: pawan-2 poolName: zfspv-pool status: Ready volumeType: DATASET kind: List metadata: resourceVersion: "" selfLink: "" ``` Create a clone volume We can provide a datasource as snapshot name to create a clone volume ```yaml kind: PersistentVolumeClaim apiVersion: v1 metadata: name: zfspv-clone spec: storageClassName: openebs-zfspv dataSource: name: zfspv-snap kind: VolumeSnapshot apiGroup: snapshot.storage.k8s.io accessModes: - ReadWriteOnce resources: requests: storage: 4Gi ``` It will create a ZFS clone volume from the mentioned snapshot and create the PV on the same node where original volume is there. Here, As resize is not supported yet, the clone PVC size should match the size of the snapshot. Also, all the properties from the storageclass will not be considered for the clone case, it will take the properties from the snapshot and create the clone volume. One thing to note here is that, the storageclass in clone PVC should have the same poolname as that of the original volume as across the pool, clone is not supported. Signed-off-by: Pawan <pawan@mayadata.io> 2020-02-13 13:31:17 +05:30			`kind: PersistentVolumeClaim`
			`apiVersion: v1`
			`metadata:`
			`name: zfspv-clone`
			`spec:`
			`storageClassName: openebs-zfspv`
			`dataSource:`
			`name: zfspv-snap`
			`kind: VolumeSnapshot`
			`apiGroup: snapshot.storage.k8s.io`
			`accessModes:`
			`- ReadWriteOnce`
			`resources:`
			`requests:`
			`storage: 4Gi`