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Storing operations logs for point-in-time recovery

Point-in-time recovery functionality allows users to roll back the cluster to a specific date and time. Technically, this feature involves saving operations log updates to the cloud storage.

Starting from the Operator version 1.15.0, point-in-time recovery functionality can be used with both logical and physical backups. Previous versions supported point-in-time recovery only with logical backups.

To be used, it requires setting the backup.pitr.enabled key in the deploy/cr.yaml configuration file:

backup:
  ...
  pitr:
    enabled: true
    oplogOnly: true

Setting backup.pitr.oplogOnly option to true is needed only for physical backups. For logical backups this option can be omitted (or set to false, which is the default value).

It is necessary to have at least one full backup to use point-in-time recovery. By default Percona Backup for MongoDB will not upload operations logs if there is no full backup (backup.pitr.oplogOnly option controls this behavior). The rule of having at least one full backup is true for new clusters and also true for clusters which have been just recovered from backup.

Note

There is also the ‘backup.pitr.oplogSpanMin` option which sets the time period between the uploads of oplogs, with default value of 10 minutes.

Percona Backup for MongoDB uploads operations logs to the same bucket/container, where full backup is stored. This makes point-in-time recovery functionality available only if there is a single bucket/container in spec.backup.storages. Otherwise point-in-time recovery will not be enabled and there will be an error message in the operator logs.

Note

Adding a new bucket or container when point-in-time recovery is enabled will not break it, but put error message about the additional bucket in the Operator logs as well.

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Last update: 2023-11-16