revamped nix for scalability

hosts/zion/configuration.nix

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+# Edit this configuration file to define what should be installed on
+# your system.  Help is available in the configuration.nix(5) man page
+# and in the NixOS manual (accessible by running ‘nixos-help’).
+{
+  inputs,
+  outputs,
+  lib,
+  config, 
+  pkgs, 
+  ...
+}: {
+  # You can import other NixOS modules here
+  imports = [
+    # If you want to use modules your own flake exports (from modules/nixos):
+    # outputs.nixosModules.example
+
+    # Or modules from other flakes (such as nixos-hardware):
+    # inputs.hardware.nixosModules.common-cpu-amd
+    # inputs.hardware.nixosModules.common-ssd
+
+    # You can also split up your configuration and import pieces of it here:
+    # ./users.nix
+
+    # Import your generated (nixos-generate-config) hardware configuration
+    ./hardware-configuration.nix
+  ];
+
+  nixpkgs = {
+    # You can add overlays here
+    overlays = [
+      # Add overlays your own flake exports (from overlays and pkgs dir):
+      outputs.overlays.additions
+      outputs.overlays.modifications
+      outputs.overlays.unstable-packages
+
+      # You can also add overlays exported from other flakes:
+      # neovim-nightly-overlay.overlays.default
+
+      # Or define it inline, for example:
+      # (final: prev: {
+      #   hi = final.hello.overrideAttrs (oldAttrs: {
+      #     patches = [ ./change-hello-to-hi.patch ];
+      #   });
+      # })
+    ];
+    # Configure your nixpkgs instance
+    config = {
+      # I'm sorry Richard Stallman
+      allowUnfree = true;
+    };
+  };
+
+  # This will add each flake input as a registry
+  # To make nix3 commands consistent with your flake
+  nix.registry = (lib.mapAttrs (_: flake: {inherit flake;})) ((lib.filterAttrs (_: lib.isType "flake")) inputs);
+
+  # This will additionally add your inputs to the system's legacy channels
+  # Making legacy nix commands consistent as well, awesome!
+  nix.nixPath = ["/etc/nix/path"];
+  environment.etc =
+    lib.mapAttrs'
+    (name: value: {
+      name = "nix/path/${name}";
+      value.source = value.flake;
+    })
+    config.nix.registry;
+
+  nix.settings = {
+    # Enable flakes and new 'nix' command
+    experimental-features = "nix-command flakes";
+    # Deduplicate and optimize nix store
+    auto-optimise-store = true;
+    # Use cache servers for packages
+    substituters = [
+      "https://nix-community.cachix.org"
+      "https://cache.nixos.org/"
+    ];
+    trusted-public-keys = [
+      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+    ];
+  };
+
+  # Hostname
+  networking.hostName = "zion";
+
+  # Bootloader settings
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  # Enables wireless support via wpa_supplicant
+  # networking.wireless.enable = true;  
+
+  # Configure network proxy if necessary
+  # networking.proxy.default = "http://user:password@proxy:port/";
+  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
+
+  # Enable networking
+  networking.networkmanager.enable = true;
+
+  # Set your time zone
+  time.timeZone = "Europe/Warsaw";
+
+  # Select internationalisation properties
+  i18n.defaultLocale = "en_US.UTF-8";
+
+  i18n.extraLocaleSettings = {
+    LC_ADDRESS = "pl_PL.UTF-8";
+    LC_IDENTIFICATION = "pl_PL.UTF-8";
+    LC_MEASUREMENT = "pl_PL.UTF-8";
+    LC_MONETARY = "pl_PL.UTF-8";
+    LC_NAME = "pl_PL.UTF-8";
+    LC_NUMERIC = "en_US.UTF-8";
+    LC_PAPER = "pl_PL.UTF-8";
+    LC_TELEPHONE = "pl_PL.UTF-8";
+    LC_TIME = "en_US.UTF-8";
+  };
+
+  # X Server settings
+  services.xserver = {
+    enable = true;
+    layout = "pl";
+    xkbVariant = "";
+
+    displayManager = {
+      lightdm = {
+        enable = true;
+      };
+    };
+
+    desktopManager = {
+      xfce = {
+        enable = true;
+      };
+    };
+  };
+  
+  # Enable OpenGL
+  hardware.opengl = {
+    enable = true;
+    driSupport = true;
+    driSupport32Bit = true;
+  };
+
+  # Load nvidia driver for Xorg and Wayland
+  services.xserver.videoDrivers = ["nvidia"];
+
+  hardware.nvidia = {
+
+    # Modesetting is required.
+    modesetting.enable = true;
+
+    # Nvidia power management. Experimental, and can cause sleep/suspend to fail.
+    # Enable this if you have graphical corruption issues or application crashes after waking
+    # up from sleep. This fixes it by saving the entire VRAM memory to /tmp/ instead 
+    # of just the bare essentials.
+    powerManagement.enable = false;
+
+    # Fine-grained power management. Turns off GPU when not in use.
+    # Experimental and only works on modern Nvidia GPUs (Turing or newer).
+    powerManagement.finegrained = false;
+
+    # Use the NVidia open source kernel module (not to be confused with the
+    # independent third-party "nouveau" open source driver).
+    # Support is limited to the Turing and later architectures. Full list of 
+    # supported GPUs is at: 
+    # https://github.com/NVIDIA/open-gpu-kernel-modules#compatible-gpus 
+    # Only available from driver 515.43.04+
+    # Currently alpha-quality/buggy, so false is currently the recommended setting.
+    open = false;
+
+    # Enable the Nvidia settings menu,
+	  # accessible via `nvidia-settings`.
+    nvidiaSettings = true;
+
+    # Optionally, you may need to select the appropriate driver version for your specific GPU.
+    package = config.boot.kernelPackages.nvidiaPackages.stable;
+  };
+
+  # I use zsh btw
+  environment.shells = with pkgs; [ bash zsh ];
+  users.defaultUserShell = pkgs.zsh;
+  programs.zsh.enable = true;
+
+  # Configure console keymap
+  console.keyMap = "pl2";
+
+  # Enable CUPS to print documents.
+  services.printing.enable = true;
+
+  # Enable sound with pipewire.
+  sound.enable = true;
+  hardware.pulseaudio.enable = false;
+  security.rtkit.enable = true;
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+    # If you want to use JACK applications, uncomment this
+    #jack.enable = true;
+
+    # use the example session manager (no others are packaged yet so this is enabled by default,
+    # no need to redefine it in your config for now)
+    #media-session.enable = true;
+  };
+
+  # Enable touchpad support (enabled default in most desktopManager).
+  # services.xserver.libinput.enable = true;
+
+  # Define a user account. Don't forget to set a password with ‘passwd’.
+  users.users = {
+    mike = {
+      isNormalUser = true;
+      description = "Mike";
+      openssh.authorizedKeys.keys = [
+        "ssh-rsa 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 mike@odin"
+      ];
+      extraGroups = [ "networkmanager" "wheel" ];
+    };
+  };
+
+  environment.systemPackages = (with pkgs; [
+    # vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
+    # wget
+    ntfs3g
+    dosfstools
+  ]);
+
+  fonts.packages = with pkgs; [ nerdfonts ];
+
+  # Some programs need SUID wrappers, can be configured further or are
+  # started in user sessions.
+   programs.mtr.enable = true;
+   programs.gnupg.agent = {
+     enable = true;
+     enableSSHSupport = true;
+   };
+
+  # This setups a SSH server. Very important if you're setting up a headless system.
+  # Feel free to remove if you don't need it.
+  services.openssh = {
+    enable = true;
+    settings = {
+      # Forbid root login through SSH.
+      PermitRootLogin = "no";
+      # Use keys only. Remove if you want to SSH using password (not recommended)
+      PasswordAuthentication = true;
+    };
+  };
+
+  # Open ports in the firewall.
+  # networking.firewall.allowedTCPPorts = [ ... ];
+  # networking.firewall.allowedUDPPorts = [ ... ];
+  # Or disable the firewall altogether.
+  # networking.firewall.enable = false;
+
+  # This value determines the NixOS release from which the default
+  # settings for stateful data, like file locations and database versions
+  # on your system were taken. It‘s perfectly fine and recommended to leave
+  # this value at the release version of the first install of this system.
+  # Before changing this value read the documentation for this option
+  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+  system.stateVersion = "23.11"; # Did you read the comment?
+}

hosts/zion/hardware-configuration.nix

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+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "ahci" "usbhid" "usb_storage" "sd_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-amd" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/8af14034-1aec-4b6f-b8c4-de13e6987ac5";
+      fsType = "ext4";
+    };
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/CEC7-B082";
+      fsType = "vfat";
+    };
+
+  swapDevices =
+    [ { device = "/dev/disk/by-uuid/00a782e1-71c2-4121-8608-9ed1104d6aa5"; }
+    ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp34s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}