zrepl VS Diun

Lastly there is zrepl. This is an automatic snapshot creation, pruning and replication daemon. It lets you automate the creation of ZFS snapshots at specific intervals, apply a retention policy to them, and replicate them out to a remote system with ZFS, like a NAS with TrueNAS on it.

I run it in a FreeBSD jail and take frequent ZFS snapshots using zrepl. I’ve had to restore after failed updates and it worked flawlessly.

As others have noted, I use syncoid but zrepl is an alternative that could be considered.

I’m going to throw out Zrepl again because it’s amazing: https://zrepl.github.io/

Current idea: We offer some form of container each other, where we have that zvol mounted somewhere for the replication use. This would mean that I could create an "inside zfs" where I create a filebased zpool. How is performance on a filebased zpool? (Although it is technically not so important that it performs critically, just trying to find the - or one of - "best" ways). Then we would offer each an ssh endpoint into that container (It doesn't have to be ssh, but it is so far convenient to setup and resilient to be open to the public). And my current plan is to use zrepl (https://zrepl.github.io/) to organise replication from my home server to this "inside" zpool.

Thanks, I used to use it. I moved to using diun to just notify of updates but not apply them though.

https://crazymax.dev/diun/ and docker compose

Similar to Watchtower but without the option to auto-update containers, just notifying is diun. But imo it does that better and more reliable than Watchtower does. You can get notified by Email, Discord, Pushover, Telegram and many more options.

If your apps are container images, then there are tools like diun, watchtower and whatsupdocker, those can watch the image repository (like Docker Hub) and notify you if a new/updated image has been found. Some can even download and auto-update for you, but that comes at some risk of course.

You might want to have a look at https://crazymax.dev/diun/ which is purpose built for what you're trying to do (notify when an update is available, but not install).

Watchtower is inferior to a project like DIUN this way. Because with double you can actually be notified by newer image versions and act accordingly. But automatic updates (which latest is aswell) are bad practice.

diun is very similar to that, but it doesnt auto-update, just notifies but does that very well imo.

I use https://crazymax.dev/diun/ to send notifications of new images. I also hook it into webbooks with CI for mirroring images, but you should be able to use something like portainer webhooks to auto pull images.