KDMP backups

KDMP backups are generic backups that Portworx Backup supports utilizing the KDMP driver. If you have deployed Portworx Backup without Portworx Enterprise, then a KDMP backup get triggered.

If you do not want to use cloud native drivers and prefer to use Portworx Backup's KDMP driver, you need to set the backup type as generic in kdmp-config ConfigMap that resides in kube-system namespace of your application cluster.

KDMP backup types

Portworx backup supports two variants of KDMP backups as outlined in the following sections:

1. KDMP with local snapshot

   In Portworx Backup, KDMP driver takes snapshots and later offloads or uploads these snapshots to S3 compliant object store.

   In this case Portworx Backup performs the following tasks:

   a. Takes available snapshot storageclass information
   b. Creates a snapshot
   c. Uses KDMP driver to attach the mount point of the PV on the worker node
   d. Copies the file system contents to object storage
   

   

2. Direct KDMP/Generic

   In this backup type, Portworx Backup utilizes the KDMP driver to attach the mount point of the PV on the worker node and copies the file system contents to object storage.

   

When a KDMP backup occurs

Portworx Backup triggers a KDMP backup in the following scenarios:

1. Portworx Backup without Portworx Enterprise:

   a. If the storage provider does not support CSI snapshots

   b. If the storage provider supports CSI snapshots and if you want to offload the backup to S3 object store along with the selection of volume snapshot class during creation of backup.

   KDMP backup matrix

   Following table provides KDMP backup matrix when the storage provider supports CSI snapshot:

   Cloud storage provider	Storage type	Backup mechanism
   AWS	EBS	Cloud-native driver
   	EFS	KDMP with local snapshot
   Azure	Disk	Cloud-native driver
   	File share	Direct KDMP
   IBM	IBM storage	KDMP with local snapshot (User must select Offload to CSI snapshot class option in the user interface)
   GCP	Google disk	Cloud-native driver
   	Google file	Direct KDMP
   OCP	OCP storage	Direct KDMP

2. Regardless of the storage provider and whether or not the CSI snapshot is supported by these storage providers, if you update the parameter BACKUP_TYPE: "Generic" in the kdmp-config ConfigMap. Refer to this topic to learn more on how to update kdmp-config ConfigMap.

3. For some on premises (for example, Flash Array) or on cloud storage providers without CSI snapshot support, direct KDMP backup gets triggered and the Portworx Backup user interface does not provide Offload to CSI snapshot backup location option. This is the default behavior of Portworx Backup.

4. Cross-cloud and cross-region backups and restores with Portworx Backup.

5. 3-2-1 backups

Create a KDMP backup

To trigger a KDMP backup for the storage provider that supports CSI snapshot class, ensure that you select the following options in the Create Backup window:

• CSI snapshot class

• Offload CSI snapshots to backup location

  
  note

  Offload CSI snapshots to backup location option appears in the Create Backup window only if the storage provider supports CSI snapshot mechanism.

  Related topics:

• Create backup

• Cross-region backups