gytis-ivaskevicius / nixfiles

My kick-ass NixOS systems configurations!!

A highly awesome system configuration

File structure

1. config - Main system configuration. base-desktop.nix contains lots of useful defaults.
2. home-manager - Holds most of the desktop configuration.
3. modules - A couple of custom options.
4. overlays - Contains riced and custom packages. Riced packages have the name prefix g-.
5. hosts - Contains host specific configuration.
6. flake.nix - Kickass flake config ;)

ZFS Cheatsheet

Create pool

zpool create -o ashift=12 -o autotrim=on -O compression=zstd -O acltype=posixacl -O xattr=sa -O atime=off -O mountpoint=legacy zroot sdx2

# with two mirrored drives
zpool create -o ashift=12 -o autotrim=on -O compression=zstd -O acltype=posixacl -O xattr=sa -O atime=off -O mountpoint=legacy zroot mirror sdx2 sdy2

• autotrim - Should be omitted for non-SSD storage.
• ashift - Requires research. this setting is device-specific, and many drives will lie.

Setup partitions

mkfs.vfat -n BOOT -F32 /dev/sdx1
parted /dev/sdx set 1 boot on

mkdir /mnt/{home,boot,nix}

zfs create -o encryption=on -o keyformat=passphrase zroot/locker
zfs create zroot/locker/home
zfs create zroot/locker/nix
zfs create zroot/locker/os

mount -t zfs zroot/locker/os /mnt
mount -t zfs zroot/locker/home /mnt/home
mount -t zfs zroot/locker/nix /mnt/nix
mount /dev/sdx1 /mnt/boot

NixOS config

{
  # needed for zfs. 4 random bytes (in hex)
  networking.hostId = "12345678";

  # or nicer implementation
  networking.hostId = builtins.substring 0 8 (builtins.hashString "md5" config.networking.hostName);

  # nixos documentation recommends setting these to false
  boot = {
      zfs.forceImportAll = false;
      zfs.forceImportRoot = false;
  };
}

unmount and export all zfs stuff before leaving the live installer!!!

zpool export zroot

nixfiles's Issues

What happens when you use utils.lib.exportModules on folders/files with the same name?

Same as title

Some questions on Kernel modules

Hello, I am trying to setup my first NixOS system, and I am a bit stumped at the lines that say:

  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "usbhid" "sd_mod" "sr_mod" "rtsx_usb_sdmmc" ];
  boot.kernelModules = [ "kvm-intel" ];

Some questions I have in my mind (and possibly others') are:

• are these from your nixos-generate-config call? If not, how did you discover them and add those to the generated hardware.nix?
• how do we know whether to include the modules in boot.initrd. (stage 1) or the boot.kernelModules?
• were there any reasons to add them in availableKernelModules instead of kernelModules. I have a feeling that this is a silly question, you can ignore this question..

Would really appreciate your answer. Thank you