Docker supports volumes for storing data across containers. This also allows us to mount the volume in a docker container to backup this volume. Using Volumerize we can mount our volume and back it up to a separate volume or many backend options.
Volumerize is a docker container that can attach your docker volumes and backup the files of the volume. It does this with a cronjob in the container or runs manually.
Volumerize uses Duplicity to make the actual backup. Supports many backup backend options like S3, Dropbox, and the local file system.