Volume Snapshot and Clones Provisioning Examples

This example is more complex and is composed of six different stages:

Stage 1: Create VolumeSnapshotClass.
Stage 2: Create Example PVC and POD.
Stage 3: Take a Snapshot from the PVC created in Stage #2.
Stage 4: Create a PVC from the Snapshot created in Stage #3 and create a POD that uses it.
Stage 5: Create a PVC from the PVC created in Stage #4 and create a POD that uses it.
Stage 6: Uninstall Snapshot Workloads.

The examples are dependent on one another, so you must run them in order.

Stage 1: Create `VolumeSnapshotClass`

Create a VolumeSnapshotClass:

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kubectl create -f examples/snaps-example-snapshot-class.yaml
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Stage 2: Create Example `PVC` and `POD`

Running the following command:

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kubectl create -f examples/snaps-example-pvc-workload.yamlpersistentvolumeclaim/example-pvc createdpod/example-pod created
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Verify that PV, PVC are created and in Bounded state and POD is in Running state.

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kubectl get pv,pvc,podsNAME                                                        CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                 STORAGECLASS   REASON   AGEpersistentvolume/pvc-797e45c0-2333-47ce-9a5e-2bb46b101163   10Gi       RWO            Delete           Bound    default/example-pvc   example-sc              57s​NAME                                STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGEpersistentvolumeclaim/example-pvc   Bound    pvc-797e45c0-2333-47ce-9a5e-2bb46b101163   10Gi       RWO            example-sc     58s​NAME              READY   STATUS    RESTARTS   AGEpod/example-pod   1/1     Running   0          58s
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Stage 3: Take a `Snapshot` from the PVC created in Stage #2

Create a snapshot from the previously created PVC named example-pvc.

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kubectl create -f examples/snaps-snapshot-from-pvc-workload.yaml volumesnapshot.snapshot.storage.k8s.io/example-snapshot created
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Verify that VolumeSnapshot and VolumeSnapshotContent were created, and that READYTOUSE status is true.

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kubectl get VolumeSnapshot,VolumeSnapshotContent​NAME                                                      READYTOUSE   SOURCEPVC     SOURCESNAPSHOTCONTENT   RESTORESIZE   SNAPSHOTCLASS         SNAPSHOTCONTENT                                    CREATIONTIME   AGEvolumesnapshot.snapshot.storage.k8s.io/example-snapshot   true         example-pvc                           10Gi          example-snapshot-sc   snapcontent-3be9e67b-ece7-4f08-8c40-922a4e84247c   2s             7s​NAME                                                              DRIVER                  DELETIONPOLICY   AGEvolumesnapshotclass.snapshot.storage.k8s.io/example-snapshot-sc   csi.lightbitslabs.com   Delete           81s
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Stage 4: Create a `PVC` from the Snapshot created in stage #3, and create a `POD` that uses it

After your VolumeSnapshot object is bound, you can use that object to provision a new volume that is pre-populated with data from the snapshot.

The volume snapshot content object is used to restore the existing volume to a previous state.

Create a PVC from the previously taken Snapshot named example-snapshot:

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kubectl create -f examples/snaps-pvc-from-snapshot-workload.yaml persistentvolumeclaim/example-pvc-from-snapshot createdpod/example-pvc-from-snapshot-pod created
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Verify that PV, PVC were created and in Bounded state, and that POD is in Running state.

Bash
    
kubectl get pv,pvc,podNAME                                                        CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                               STORAGECLASS   REASON   AGEpersistentvolume/pvc-797e45c0-2333-47ce-9a5e-2bb46b101163   10Gi       RWO            Delete           Bound    default/example-pvc                 example-sc              18mpersistentvolume/pvc-d1d20d2b-7fdd-4775-9107-ab8129841a74   10Gi       RWO            Delete           Bound    default/example-pvc-from-snapshot   example-sc              2m24s​NAME                                              STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGEpersistentvolumeclaim/example-pvc                 Bound    pvc-797e45c0-2333-47ce-9a5e-2bb46b101163   10Gi       RWO            example-sc     18mpersistentvolumeclaim/example-pvc-from-snapshot   Bound    pvc-d1d20d2b-7fdd-4775-9107-ab8129841a74   10Gi       RWO            example-sc     2m25s​NAME                                READY   STATUS    RESTARTS   AGEpod/example-pod                     1/1     Running   0          18mpod/example-pvc-from-snapshot-pod   1/1     Running   0          2m25s
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We see the PV, PVC and PODs from Stage #2 as well.

Stage 5: Create a `PVC` from the `PVC` we created in stage #4, and create a `POD` that uses it

Create a PVC from the previously taken Snapshot named example-snapshot.

Bash
    
 
kubectl create -f examples/snaps-pvc-from-pvc-workload.yaml persistentvolumeclaim/example-pvc-from-pvc createdpod/example-pvc-from-pvc-pod created
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Verify that PV, PVC were created and in Bounded state, and that POD is in Running state.

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kubectl get pv,pvc,podNAME                                                        CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                               STORAGECLASS   REASON   AGEpersistentvolume/pvc-1fe22ed7-3b7e-4094-95a3-995538659c51   10Gi       RWO            Delete           Bound    default/example-pvc-from-pvc        example-sc              15spersistentvolume/pvc-797e45c0-2333-47ce-9a5e-2bb46b101163   10Gi       RWO            Delete           Bound    default/example-pvc                 example-sc              5h53mpersistentvolume/pvc-d1d20d2b-7fdd-4775-9107-ab8129841a74   10Gi       RWO            Delete           Bound    default/example-pvc-from-snapshot   example-sc              5h36m​NAME                                              STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGEpersistentvolumeclaim/example-pvc                 Bound    pvc-797e45c0-2333-47ce-9a5e-2bb46b101163   10Gi       RWO            example-sc     5h53mpersistentvolumeclaim/example-pvc-from-pvc        Bound    pvc-1fe22ed7-3b7e-4094-95a3-995538659c51   10Gi       RWO            example-sc     23spersistentvolumeclaim/example-pvc-from-snapshot   Bound    pvc-d1d20d2b-7fdd-4775-9107-ab8129841a74   10Gi       RWO            example-sc     5h36m​NAME                                READY   STATUS    RESTARTS   AGEpod/example-pod                     1/1     Running   0          5h53mpod/example-pvc-from-pvc-pod        1/1     Running   0          23spod/example-pvc-from-snapshot-pod   1/1     Running   0          5h36m
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We see the PV, PVC and PODs from Stages #2 and #4 as well.

Stage 6: Uninstall Snapshot Workloads

Note: Installation must be in reverse order of the deployment.

After each uninstall, we need to verify that all related resources were released before continuing to the next uninstall.

Uninstall pvc-from-pvc:

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kubectl delete -f examples/snaps-pvc-from-pvc-workload.yamlpersistentvolumeclaim "example-pvc-from-pvc" deletedpod "example-pvc-from-pvc-pod" deleted
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In order to verify that all resources are deleted, the following command should not generate any output:

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kubectl get pv,pvc,pod | grep pvc-from-pvc
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Uninstall pvc-from-snapshot:

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kubectl delete -f examples/snaps-pvc-from-snapshot-workload.yaml persistentvolumeclaim "example-pvc-from-snapshot" deletedpod "example-pvc-from-snapshot-pod" deleted
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In order to verify that all resources are deleted, the following command should not generate any output:

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kubectl get pv,pvc,pod | grep pvc-from-snapshot
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Uninstall snapshot-from-pvc:

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kubectl delete -f examples/snaps-snapshot-from-pvc-workload.yaml volumesnapshot.snapshot.storage.k8s.io "example-snapshot" deleted
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In order to verify that all resources are deleted, the following command should not generate any output:

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kubectl get VolumeSnapshot,VolumeSnapshotContent | grep snapshot-from-pvc
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Uninstall example-pvc:

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kubectl delete -f examples/snaps-example-pvc-workload.yaml persistentvolumeclaim "example-pvc" deletedpod "example-pod" deleted
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Verify that all resources are gone:

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kubectl get pv,pvc,podsNo resources found in default namespace.
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Delete VolumeSnapshotClass:

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kubectl delete -f examples/snaps-example-snapshot-class.yamlvolumesnapshotclass "example-snapshot-sc" deleted
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Volume Snapshot and Clones Provisioning Examples

Stage 1: Create VolumeSnapshotClass

Stage 2: Create Example PVC and POD

Stage 3: Take a Snapshot from the PVC created in Stage #2

Stage 4: Create a PVC from the Snapshot created in stage #3, and create a POD that uses it

Stage 5: Create a PVC from the PVC we created in stage #4, and create a POD that uses it

Stage 6: Uninstall Snapshot Workloads

Stage 1: Create `VolumeSnapshotClass`

Stage 2: Create Example `PVC` and `POD`

Stage 3: Take a `Snapshot` from the PVC created in Stage #2

Stage 4: Create a `PVC` from the Snapshot created in stage #3, and create a `POD` that uses it

Stage 5: Create a `PVC` from the `PVC` we created in stage #4, and create a `POD` that uses it