[nunez]

rclone is great for this.

One could set up a Docker Compose service that uses rclone to gzip and back up your docker volumes to something durable to get this done. An even more advanced version of this would automate testing the backups by restoring them into a clean environment and running some tests with BATS or whatever testing framework you want.

[nijave]

Rclone won't take a consistent snapshot so you either need to shutdown the thing or use some other tool to export the data first

[auxym]

zfs/btrfs snapshot and then rclone that snapshot?

[nijave]

I think that'd break deleting incremental snapshots unless you tried uploading a gigantic blob of the entire filesystem, wouldn't it?

Meaning you'd need to upload full snapshots on a fixed interval