I have a unused RPi4 (the 8Gig one) running DietPi.
I did use it as a playground but ever since I am renting a Hetzner machine for (playground) stuff that I want web accessible, I don't have particular use for the Pi.
I am currently running (outdated) Home Assistant on it but there isn't much I can connect it with (yet, getting the flashable/compatible ikea smart lightning zigbee? bridge thingy is on my bucket list).
Obviously I do have a pihole there.
Shoot me any other ideas I could run there.
Some kind of monitoring of my rented infra would be cool (I already have uptime kuma on the dedi hetzner box). One idea I had was if there are some OSS security scanning "daemons" I could use on to monitor my other infra.
Vaultwarden is super, but I'd be hesitant to run it on a Raspberry Pi unless I had good backups in place. I've always run stuff off MicroSD cards with Pi's, but I'm sure there's a way to use real drives which would make me feel better.
You don't need permanent backups of it. Vaultwarden is more like a secure "syncthing". I crashed a system with vaultwarden had to rebuild everything but after connecting it to my devices I got the passwords from them back again and nothing was lost.
Yeah that's true, your devices will still have a cached copy. Still... losing the host would be a pain. It looks like (from the browser extension at least) I can export the vault, so maybe it's not as bad as it seems.