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How to Override Volume storageClass During Export

KB ID: 4595
Product: Veeam Kasten for Kubernetes
Published: 2024-06-07
Last Modified: 2024-06-07
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Purpose

This article documents how to configure a Veeam Kasten for Kubernetes export parameter to specify the storageClass that is created and used during exports.

Solution

The ExporterStorageClassName parameter can be used for namespaces that have PersistentVolumeClaims (PVCs) using a single storageClass, as well as in cases where multiple PVCs, using different storageClasses, are in the same namespace.

This is particularly helpful when the application's PVC is provisioned using a storageClass with the deletion policy set to 'Retain'. This setting ensures that there are no leftover PersistentVolumes (PVs) in the 'released' state after the temporary PVCs, created for exports, have been cleaned up.

The examples below show how to add these parameters by editing the Policy manually.

Single storageClass

apiVersion: config.kio.kasten.io/v1alpha1
kind: Policy
metadata:
 name: postgresql-backup-1
 namespace: kasten-io
spec:
 actions:
 - action: backup
 - action: export
   exportParameters:
     exportData:
       enabled: true
       # Storage class to use for any temporary PVCs created
       # during the snapshot conversion process. If not specified, the
       # storage class of the source volume is used.
       exporterStorageClassName: gp2-delete
     frequency: '@hourly'
     migrationToken:
       name: postgresql-backup-1-migration-token-7vrgc
       namespace: kasten-io
     profile:
       name: test-jai
       namespace: kasten-io
     receiveString: xxxxxxx
   retention: {}
 createdBy: kasten-io:k10-k10
 frequency: '@hourly'
 retention:
   daily: 7
   hourly: 24
   monthly: 12
   weekly: 4
   yearly: 7
 selector:
   matchExpressions:
   - key: k10.kasten.io/appNamespace
     operator: In
     values:
     - postgresql
     - kasten-io-cluster

Multiple storageClass

apiVersion: config.kio.kasten.io/v1alpha1
kind: Policy
metadata:
 name: postgresql-backup-1
 namespace: kasten-io
spec:
 actions:
 - action: backup
 - action: export
   exportParameters:
     exportData:
       enabled: true
       overrides:
           # Override setting of a specific storage class
         - storageClassName: gp2-retain
           enabled: true
           exporterStorageClassName: gp2-delete
         - storageClassName: gp3-retain
           enabled: true
           exporterStorageClassName: gp3-delete
           # Setting to disable the export for a specific storageClass
         - storageClassName: nfs-client
           enabled: false
     frequency: '@hourly'
     migrationToken:
       name: postgresql-backup-1-migration-token-7vrgc
       namespace: kasten-io
     profile:
       name: test-jai
       namespace: kasten-io
     receiveString: xxxxxxx
   retention: {}
 createdBy: kasten-io:k10-k10
 frequency: '@hourly'
 retention:
   daily: 7
   hourly: 24
   monthly: 12
   weekly: 4
   yearly: 7
 selector:
   matchExpressions:
   - key: k10.kasten.io/appNamespace
     operator: In
     values:
     - postgresql
     - kasten-io-cluster

Note: It is also possible to disable the export of a specific storageClass as in the example below for NFS:

 # Setting to disable the export for a specific storageClass
         - storageClassName: nfs-client
           enabled: false

More Information

Regarding all fields that can be configured with the policy API, please refer to https://docs.kasten.io/latest/api/policies.html for more information.
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