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Upgrade with tridentctl

Contributors juliantap
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You can easily upgrade an existing Astra Trident installation using tridentctl.

Upgrade Astra Trident using tridentctl

Uninstalling and reinstalling Astra Trident acts as an upgrade. When you uninstall Trident, the Persistent Volume Claim (PVC) and Persistent Volume (PV) used by the Astra Trident deployment are not deleted. PVs that have already been provisioned will remain available while Astra Trident is offline, and Astra Trident will provision volumes for any PVCs that are created in the interim once it is back online.

Before you begin

Review Select an upgrade method before upgrading using tridentctl.

Steps

  1. Run the uninstall command in tridentctl to remove all of the resources associated with Astra Trident except for the CRDs and related objects.

    ./tridentctl uninstall -n <namespace>

  2. Reinstall Astra Trident. Refer to Install Astra Trident using tridentctl.

Important Do not interrupt the upgrade process. Ensure the installer runs to completion.

Upgrade volumes using tridentctl

After upgrade, you can make use of the rich set of features that are available in newer Trident releases (such as, On-Demand Volume Snapshots), you can upgrade the volumes using the tridentctl upgrade command.

If there are legacy volumes, you should upgrade them from a NFS or iSCSI type to the CSI type to use the complete set of new features in Astra Trident. A legacy PV that has been provisioned by Trident supports the traditional set of features.

Before you begin

Consider the following before deciding to upgrade volumes to the CSI type:

  • You might not need to upgrade all the volumes. Previously created volumes will continue to be accessible and function normally.

  • A PV can be mounted as part of a deployment/StatefulSet when upgrading. It is not required to bring down the deployment/StatefulSet.

  • You cannot attach a PV to a standalone pod when upgrading. You should shut down the pod before upgrading the volume.

  • You can upgrade only a volume that is bound to a PVC. Volumes that are not bound to PVCs should be removed and imported before upgrading.

Steps

  1. Run kubectl get pv to list the PVs.

    kubectl get pv
NAME                         CAPACITY     ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                  STORAGECLASS    REASON   AGE
default-pvc-1-a8475          1073741824   RWO            Delete           Bound    default/pvc-1          standard                 19h
default-pvc-2-a8486          1073741824   RWO            Delete           Bound    default/pvc-2          standard                 19h
default-pvc-3-a849e          1073741824   RWO            Delete           Bound    default/pvc-3          standard                 19h
default-pvc-4-a84de          1073741824   RWO            Delete           Bound    default/pvc-4          standard                 19h
trident                      2Gi          RWO            Retain           Bound    trident/trident                                 19h

    There are currently four PVs that have been created by Trident 20.07, using the netapp.io/trident provisioner.

  2. Run kubectl describe pv to get the details of the PV.

    kubectl describe pv default-pvc-2-a8486

Name:            default-pvc-2-a8486
Labels:          <none>
Annotations:     pv.kubernetes.io/provisioned-by: netapp.io/trident
                 volume.beta.kubernetes.io/storage-class: standard
Finalizers:      [kubernetes.io/pv-protection]
StorageClass:    standard
Status:          Bound
Claim:           default/pvc-2
Reclaim Policy:  Delete
Access Modes:    RWO
VolumeMode:      Filesystem
Capacity:        1073741824
Node Affinity:   <none>
Message:
Source:
    Type:      NFS (an NFS mount that lasts the lifetime of a pod)
    Server:    10.xx.xx.xx
    Path:      /trid_1907_alpha_default_pvc_2_a8486
    ReadOnly:  false

    The PV was created by using the netapp.io/trident provisioner and is of the type NFS. To support all the new features provided by Astra Trident, this PV should be upgraded to the CSI type.

  3. Run the tridentctl upgrade volume <name-of-trident-volume> command to upgrade a legacy Astra Trident volume to the CSI spec.

    ./tridentctl get volumes -n trident
+---------------------+---------+---------------+----------+--------------------------------------+--------+---------+
|            NAME     |  SIZE   | STORAGE CLASS | PROTOCOL |             BACKEND UUID             | STATE  | MANAGED |
+---------------------+---------+---------------+----------+--------------------------------------+--------+---------+
| default-pvc-2-a8486 | 1.0 GiB | standard      | file     | c5a6f6a4-b052-423b-80d4-8fb491a14a22 | online | true    |
| default-pvc-3-a849e | 1.0 GiB | standard      | file     | c5a6f6a4-b052-423b-80d4-8fb491a14a22 | online | true    |
| default-pvc-1-a8475 | 1.0 GiB | standard      | file     | c5a6f6a4-b052-423b-80d4-8fb491a14a22 | online | true    |
| default-pvc-4-a84de | 1.0 GiB | standard      | file     | c5a6f6a4-b052-423b-80d4-8fb491a14a22 | online | true    |
+---------------------+---------+---------------+----------+--------------------------------------+--------+---------+

./tridentctl upgrade volume default-pvc-2-a8486 -n trident
+---------------------+---------+---------------+----------+--------------------------------------+--------+---------+
|            NAME     |  SIZE   | STORAGE CLASS | PROTOCOL |             BACKEND UUID             | STATE  | MANAGED |
+---------------------+---------+---------------+----------+--------------------------------------+--------+---------+
| default-pvc-2-a8486 | 1.0 GiB | standard      | file     | c5a6f6a4-b052-423b-80d4-8fb491a14a22 | online | true    |
+---------------------+---------+---------------+----------+--------------------------------------+--------+---------+

  4. Run a kubectl describe pv to verify that the volume is a CSI volume.

    kubectl describe pv default-pvc-2-a8486
Name:            default-pvc-2-a8486
Labels:          <none>
Annotations:     pv.kubernetes.io/provisioned-by: csi.trident.netapp.io
                 volume.beta.kubernetes.io/storage-class: standard
Finalizers:      [kubernetes.io/pv-protection]
StorageClass:    standard
Status:          Bound
Claim:           default/pvc-2
Reclaim Policy:  Delete
Access Modes:    RWO
VolumeMode:      Filesystem
Capacity:        1073741824
Node Affinity:   <none>
Message:
Source:
    Type:              CSI (a Container Storage Interface (CSI) volume source)
    Driver:            csi.trident.netapp.io
    VolumeHandle:      default-pvc-2-a8486
    ReadOnly:          false
    VolumeAttributes:      backendUUID=c5a6f6a4-b052-423b-80d4-8fb491a14a22
                           internalName=trid_1907_alpha_default_pvc_2_a8486
                           name=default-pvc-2-a8486
                           protocol=file
Events:                <none>