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installation-demo.md

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Example NixOS installation (qemu-kvm, UEFI, LUKS/BTRFS or LVM/ext4, systemd-boot)

Preparation

File system (Variant 1: LUKS/BTRFS)

  • Create partitions

    parted /dev/vda -- mklabel gpt
parted /dev/vda -- mkpart ESP fat32 1MiB 512MiB
parted /dev/vda -- set 1 esp on
parted /dev/vda -- mkpart primary 512MiB 100%

  • Set up LUKS

    cryptsetup luksFormat /dev/vda2
cryptsetup luksOpen /dev/vda2 crypt

  • Create filesystems

    mkfs.btrfs -L nixos /dev/mapper/crypt
mount /dev/disk/by-label/nixos /mnt/
btrfs subvolume create /mnt/root
btrfs subvolume create /mnt/nix
btrfs subvolume create /mnt/var
btrfs subvolume create /mnt/home
btrfs subvolume create /mnt/home/.snapshots
btrfs subvolume create /mnt/data
umount /mnt

mkfs.fat -F 32 -n boot /dev/vda1

  • Mount volumes

    mount /dev/disk/by-label/nixos -o subvol=root,noatime,compress=zstd:1 /mnt
mkdir -p /mnt/{boot,data,home,nix,var}
mount /dev/disk/by-label/boot /mnt/boot/
mount /dev/disk/by-label/nixos -o subvol=data,noatime,compress=zstd:1 /mnt/data
mount /dev/disk/by-label/nixos -o subvol=home,noatime,compress=zstd:1 /mnt/home
mount /dev/disk/by-label/nixos -o subvol=nix,noatime,compress=zstd:1 /mnt/nix
mount /dev/disk/by-label/nixos -o subvol=var,noatime,compress=zstd:1 /mnt/var

  • Create swap file

    truncate -s 0 /mnt/.swapfile
chattr +C /mnt/.swapfile
btrfs property set /mnt/.swapfile compression none
fallocate -l 4G /mnt/.swapfile
chmod 600 /mnt/.swapfile

  • Activate swap

    mkswap /mnt/.swapfile
swapon /mnt/.swapfile

File system (Variant 2: LVM/ext4)

  • Create partitions

    parted /dev/vda -- mklabel gpt
parted /dev/vda -- mkpart ESP fat32 1MiB 512MiB
parted /dev/vda -- set 1 esp on
parted /dev/vda -- mkpart primary 512MiB 100%
parted /dev/vda -- set 2 lvm on

  • Create filesystems

    pvcreate /dev/vda2
vgcreate pool /dev/vda2

lvcreate -n host.root -L 1G pool
lvcreate -n host.var -L 100G pool
lvcreate -n host.swap -L 4G pool
lvcreate -n shared.home -L 100G pool
lvcreate -n shared.data -L 100G pool
lvcreate -n shared.nix -L 100G pool

mkfs.fat -F 32 -n boot /dev/vda1
mkfs.ext4 /dev/pool/host.root
mkfs.ext4 /dev/pool/host.var
mkfs.ext4 /dev/pool/shared.home
mkfs.ext4 /dev/pool/shared.data
mkfs.ext4 /dev/pool/shared.nix

  • Mount volumes

    mount /dev/pool/host.root /mnt
mkdir -p /mnt/{boot,data,home,nix,var}
mount /dev/disk/by-label/boot /mnt/boot/
mount /dev/pool/host.var /mnt/var
mount /dev/pool/shared.data /mnt/data
mount /dev/pool/shared.home /mnt/home
mount /dev/pool/shared.nix /mnt/nix

  • Activate swap

    mkswap /dev/pool/host.swap
swapon /dev/pool/host.swap

Installation

  • Enter Nix shell

    nix-shell -p git

  • Clone repository

    cd /mnt/data
git clone https://github.com/mrkuz/nixos.git
cd nixos

  • Change dotfiles.url in flake.nix to point to the GitHub repository, not local directory.

    {
  dotfiles = {
    url = "github:mrkuz/dotfiles";
    flake = false;
  };
}

  • Update inputs

    export NIX_CONFIG="experimental-features = nix-command flakes"
./scripts/update.sh

  • Install

    nixos-install --root /mnt --flake /mnt/data/nixos#demo

  • Reboot

Final steps

  • Move configuration to final location

    mkdir -p ~/etc/
sudo mv /data/nixos ~/etc
sudo chown user:user -R ~/etc/nixos
cd ~/etc/nixos

  • Initialize submodules

    git submodule init
git submodule update

  • Clone nixpkgs (optional)

    sudo git clone https://github.com/NixOS/nixpkgs.git /nix/nixpkgs
cd /nix/nixpkgs
sudo git checkout nixos-unstable

  • Update and rebuild system

    ./scripts/update.sh
./scripts/rebuild.sh demo