How Backup Works

In this article

    Veeam Backup for Google Cloud does not install agent software inside instances to retrieve data. To back up both VM instances and Cloud SQL instances, Veeam Backup for Google Cloud uses native Google Cloud capabilities. During every backup session, Veeam Backup for Google Cloud creates a cloud-native snapshot for each instance added to a backup policy. The cloud-native snapshot is further used to create an image-level backup of the instance.

    VM Instance Backup

    Veeam Backup for Google Cloud performs VM instance backup in the following way:

    1. Veeam Backup for Google Cloud creates snapshots of persistent disks that are attached to the processed VM instance.

    PD snapshots are assigned resource labels upon creation. Keys and values of resource labels contain encrypted metadata that helps Veeam Backup for Google Cloud identify the related PD snapshots and treat them as a single unit — a cloud-native snapshot.

    1. If you enable image-level backup for the backup policy, Veeam Backup for Google Cloud performs the following operations:
    1. Deploys a worker instance in a Google Cloud region in which the processed VM instance resides.

    By default, Veeam Backup for Google Cloud deploys worker instances with the same network configurations as those specified for the processed VM instances. However, you can add specific worker configurations. For more information, see Managing Workers.

    1. Re-creates the persistent disks from the cloud-native snapshot created at step 1 and attaches them to the worker instance.

    Note that the cloud-native snapshot used as a source for image-level backup is not a temporary snapshot — when the backup session completes, this snapshot remains in the snapshot chain and is deleted later according to the specified policy scheduling settings.

    1. Reads data from the persistent disks on the worker instance, transfers the data to the target storage bucket and stores it in the native Veeam format.

    Veeam Backup for Google Cloud encrypts and compresses data saved to storage buckets. For more information, see Enabling Data Encryption.

    1. Removes the worker instance when the backup session completes.
    1. If you enable the backup archiving mechanism, Veeam Backup for Google Cloud performs the following operations:
    1. Deploys a worker instance in a Google Cloud region in which the processed VM instance resides.
    2. Retrieves data from the standard storage bucket and transfers it to the archive storage bucket.
    3. Removes the worker instance when the archive session completes.

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