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Duplicati is a free backup tool that encrypts your data with AES-256 before sending it and only uploads the blocks that have changed. With Docker you bring it up from a single docker-compose.yml, mount your folders read-only and schedule encrypted backups to S3, MinIO, B2 or SFTP. This guide covers installation, encryption, retention and restore.
A container loses its data the moment you delete it, unless you store that data outside. Docker gives you two ways: named volumes, which it manages itself under /var/lib/docker/volumes, and bind mounts, which link a host folder. Here you will see when to use each, how to mount them in Compose and how to back them up.
Litestream is an open-source tool that replicates a SQLite database to an S3 bucket in near real time by reading the WAL SQLite already writes. It offers point-in-time recovery, overhead of only 1 to 3% CPU, and replaces the need for a separate database server in small apps.
