nixos

My NixOS configuration

Installation instructions

1. Boot the minimal NixOS ISO image
2. Create a GPT partition table with the following partitions:
   • /dev/EFI_PARTITION: EFI system partition (type: EFI System, size: 1G)
   • /dev/LUKS_PARTITION: Encrypted root partition (type: Linux filesystem)
3. Create and open the LUKS container:

   cryptsetup -yv luksFormat /dev/LUKS_PARTITION
   cryptsetup open /dev/LUKS_PARTITION root

4. Create and mount btrfs subvolumes:

   mkfs.btrfs -f /dev/mapper/root
   
   mount -m -o noatime,compress=zstd /dev/mapper/root /mnt
   btrfs subvolume create /mnt/@data
   btrfs subvolume create /mnt/@data/.snapshots
   btrfs subvolume create /mnt/@cache
   btrfs subvolume create /mnt/@cache/.snapshots
   btrfs subvolume create /mnt/@nix
   btrfs subvolume create /mnt/@swap
   umount /mnt
   
   mount -m -o size=100%,mode=755 -t tmpfs tmpfs /mnt
   mount -m -o noatime,compress=zstd,subvol=@data /dev/mapper/root /mnt/persistent/data
   mount -m -o noatime,compress=zstd,subvol=@cache /dev/mapper/root /mnt/persistent/cache
   mount -m -o noatime,compress=zstd,subvol=@nix /dev/mapper/root /mnt/nix
   mount -m -o noatime,compress=zstd,subvol=@swap /dev/mapper/root /mnt/swap

5. Create and activate swapfile:

   btrfs filesystem mkswapfile -s 16G /mnt/swap/swapfile
   btrfs inspect-internal map-swapfile -r /mnt/swap/swapfile  # resume_offset
   swapon /mnt/swap/swapfile

6. Format and mount EFI system partition:

   mkfs.vfat /dev/EFI_PARTITION
   mount -m -o umask=0077 /dev/EFI_PARTITION /mnt/boot

7. Install git:

   nix-env -iA nixos.git

8. Clone this repository:

   mkdir -p /mnt/persistent/data/home/felix/
   cd /mnt/persistent/data/home/felix/
   git clone https://github.com/Defelo/nixos.git
   cd nixos

9. Create a new or modify an existing host (don't forget to add new files to git).
10. Install the system and reboot:

    nixos-install --flake .#HOSTNAME --no-channel-copy --no-root-password
    reboot