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Export backups to your own cloud account

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ClickHouse Cloud supports taking backups to your own cloud service provider (CSP) account (AWS S3, Google Cloud Storage, or Azure Blob Storage). For details of how ClickHouse Cloud backups work, including “full” vs. “incremental” backups, see the backups docs. Note that backups to your own cloud account behave differently from in-place Cloud backups in one important way: they cannot use native copy (see the note below).

In this guide, we show examples of how to take full and incremental backups to AWS, GCP, Azure object storage as well as how to restore from the backups.

Requirements

Before you run a BACKUP command, make sure your ClickHouse user has the BACKUP privilege. The default_role in ClickHouse Cloud doesn’t include this privilege. Contact ClickHouse Support to request it before exporting backups.

You will need the following details to export/restore backups to your own CSP storage bucket.

AWS

  1. AWS S3 endpoint, in the format:
s3://<bucket_name>.s3.amazonaws.com/<directory>

For example:

s3://testchbackups.s3.amazonaws.com/backups/

Where:

  • testchbackups is the name of the S3 bucket to export backups to.
  • backups is an optional subdirectory.
  1. AWS access key and secret. AWS role based authentication is also supported and can be used in place of AWS access key and secret.

Azure

  1. Azure storage connection string.
  2. Azure container name in the storage account.
  3. Azure Blob within the container.

Google Cloud Storage (GCS)

  1. GCS endpoint, in the format:

    https://storage.googleapis.com/<bucket_name>/

  2. Access HMAC key and HMAC secret.

Backup / Restore

Backup / Restore to AWS S3 Bucket

Take a DB backup

Full Backup

BACKUP DATABASE test_backups 
TO S3('https://testchbackups.s3.amazonaws.com/backups/<uuid>', '<key id>', '<key secret>')

Where uuid is a unique identifier, used to differentiate a set of backups.

Incremental Backup

BACKUP DATABASE test_backups 
TO S3('https://testchbackups.s3.amazonaws.com/backups/<uuid>', '<key id>', '<key secret>') 
SETTINGS base_backup = S3('https://testchbackups.s3.amazonaws.com/backups/<base-backup-uuid>', '<key id>', '<key secret>')

Restore from a backup

RESTORE DATABASE test_backups 
AS test_backups_restored 
FROM S3('https://testchbackups.s3.amazonaws.com/backups/<uuid>', '<key id>', '<key secret>')

See: Configuring BACKUP/RESTORE to use an S3 Endpoint for more details.

Backup / Restore to Azure Blob Storage

Take a DB backup

Full Backup

BACKUP DATABASE test_backups 
TO AzureBlobStorage('<AzureBlobStorage endpoint connection string>', '<container>', '<blob>/<uuid>');

Where uuid is a unique identifier, used to differentiate a set of backups.

Incremental Backup

BACKUP DATABASE test_backups 
TO AzureBlobStorage('<AzureBlobStorage endpoint connection string>', '<container>', '<blob>/<uuid>/my_incremental') 
SETTINGS base_backup = AzureBlobStorage('<AzureBlobStorage endpoint connection string>', '<container>', '<blob>/<uuid>')

Restore from a backup

RESTORE DATABASE test_backups 
AS test_backups_restored_azure 
FROM AzureBlobStorage('<AzureBlobStorage endpoint connection string>', '<container>', '<blob>/<uuid>')

See: Configuring BACKUP/RESTORE to use an AzureBlobStorage Endpoint for more details.

Backup / Restore to Google Cloud Storage (GCS)

Take a DB backup

Full Backup

BACKUP DATABASE test_backups 
TO S3('https://storage.googleapis.com/<bucket>/<uuid>', <hmac-key>', <hmac-secret>)

Where uuid is a unique identifier, used to differentiate a set of backups.

Incremental Backup

BACKUP DATABASE test_backups 
TO S3('https://storage.googleapis.com/test_gcs_backups/<uuid>/my_incremental', 'key', 'secret')
SETTINGS base_backup = S3('https://storage.googleapis.com/test_gcs_backups/<uuid>', 'key', 'secret')

Restore from a backup

RESTORE DATABASE test_backups 
AS test_backups_restored_gcs 
FROM S3('https://storage.googleapis.com/test_gcs_backups/<uuid>', 'key', 'secret')
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