nixos-configs/hosts/rpi3/default.nix

{ inputs, pkgs, ... }:
{

  nix = {
    registry.nixpkgs.flake = inputs.nixpkgs;
    nixPath = [ "nixpkgs=${inputs.nixpkgs}" ];
  };

  boot = {
    loader.grub.enable = false;
    loader.generic-extlinux-compatible.enable = true;
    kernelParams = [ "cma=256M" ];
  };

  fileSystems."/" = {
    device = "/dev/disk/by-label/NIXOS_SD";
    fsType = "ext4";
  };

  swapDevices = [
    {
      device = "/swapfile";
      size = 1024;
    }
  ];

  services.openssh.enable = true;
  users.users.root.openssh.authorizedKeys.keyFiles = [
    ../../ssh_keys/phfroidmont-desktop.pub
    ../../ssh_keys/phfroidmont-stellaris.pub
  ];

  services.adguardhome = {
    enable = true;

    openFirewall = true;

    mutableSettings = false;

    settings = {
      http = {
        address = "0.0.0.0:80";
      };
      auth_attempts = 5;
      block_auth_min = 15;
      dns = {
        bind_hosts = [ "0.0.0.0" ];
        port = 53;
        statistics_interval = 90;
        upstream_dns = [
          "tls://doh.mullvad.net"
          "[/lan/]192.168.1.1"
          "[//]192.168.1.1"
        ];
        local_ptr_upstreams = [ "192.168.1.1" ];
        use_private_ptr_resolvers = true;
        resolve_clients = true;
        bootstrap_dns = [ "9.9.9.10" ];
        rewrites = [
          {
            domain = "rpi3";
            answer = "192.168.1.2";
          }
          {
            domain = "rpi3.lan";
            answer = "192.168.1.2";
          }
        ];
      };
      querylog = {
        enabled = true;
        interval = "2160h";
      };
    };
  };

  networking = {
    hostName = "rpi3";
    firewall.allowedTCPPorts = [
      53
      80
    ];
    firewall.allowedUDPPorts = [ 53 ];
  };

  environment.systemPackages = with pkgs; [
    vim
    htop-vim
  ];

  system.stateVersion = "22.05";
}