athens/hosts/aristotle/configuration.nix

{ config, pkgs, ... }:

{
  imports = [
    # Include the results of the hardware scan.
    ./hardware-configuration.nix
    ./rpi-poe.nix

    ../../modules/ipfs/cluster.nix
    ../../modules/sops
  ];

  nixpkgs.overlays = [ (import ../../overlays) ];

  # Use the extlinux boot loader. (NixOS wants to enable GRUB by default)
  boot.loader.grub.enable = false;
  # Enables the generation of /boot/extlinux/extlinux.conf
  boot.loader.generic-extlinux-compatible.enable = false;

  boot.kernelPackages = pkgs.linuxPackages_rpi4;
  boot.loader.raspberryPi = {
    enable = true;
    version = 4;
  };

  # networking.hostName = "nixos"; # Define your hostname.
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

  # The global useDHCP flag is deprecated, therefore explicitly set to false here.
  # Per-interface useDHCP will be mandatory in the future, so this generated config
  # replicates the default behaviour.
  networking.useDHCP = false;
  networking.interfaces.eth0.useDHCP = true;
  networking.interfaces.wlan0.useDHCP = true;
  networking.firewall.enable = false;

  # Enable the OpenSSH daemon.
  services.openssh.enable = true;
  users.users.root.openssh.authorizedKeys.keys = [
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJ0mE4MyMnfd1b2nlBJT7kpZ6Vov+ILuGNfzdp5ZBNQe walkah@walkah.net"
  ];

  environment.systemPackages = with pkgs; [ libraspberrypi ];

  services = {
    prometheus = {
      enable = true;
      port = 9090;
      exporters = {
        node = {
          enable = true;
          enabledCollectors = [ "systemd" ];
          openFirewall = true;
          port = 9100;
        };
      };
    };
    tailscale = { enable = true; };
  };

  # 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 = "21.03"; # Did you read the comment?
}