Don't get me wrong I love some of the software suggested. However yet a another post that does not take backups as seriously as the rest of the self-hosting stack.
Backups are stuck in 2013. We need plug and play backups for containers! No more roll your own with zfs datasets, back up data on the filesystem level (using sanoid/syncoid to manage snapshots or any other alternatives.
Fully automated, incremental, verified backups, and restoring is one click of a button.
I find it strange that, especially with a docker which already knows your volumes, app data, and config, can't automatically backup and restore databases, and configs. Jeez, they could have built it right into docker.
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.
Each VM or container gets a data mount on a zvol. Containers go to OS mount and each OS has its own volume (so most VMs end up with 2 volumes attached)