guekka / nixos-server Goto Github PK

I'm opening an issue because it's easier than a fork (I've already forked your code). Just want to say thanks for the repo! I've been playing with this for the last couple of weeks. Just one tip. If you set a top-level btfrs subvolume, e.g. "@" in your nix-setup script, then you can have a flat btrfs subvolume structure and don't need to delete any subvolumes of root at boot - you just delete root directly and replace with it's copy root-blank.
So nix-setup.sh would look like:

mount "$DISK"3 /mnt
btrfs subvolume create /mnt/@
btrfs subvolume create /mnt/@/root
btrfs subvolume create /mnt/@/home
btrfs subvolume create /mnt/@/nix
btrfs subvolume create /mnt/@/persist
btrfs subvolume create /mnt/@/log

I realized this after I was trying to get disko working with impermanence, and I couldn't get it to work properly with nested subvolumes (though I may have just been doing something wrong!). There is a good discussion on the old btrfs wiki on flat vs nested subvolumes They each have their pros and cons. I think I find flat easier to work with.

Anyway thanks again!