nixcfg/configuration.nix

# 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’).

{ config, pkgs, ... } @ args:

# Configuration local for this cluster node (hostname, IP, etc)
let node_config = import ./node.nix args;
in
{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
      # Configuration local for this cluster node (hostname, IP, etc)
      ./node.nix
    ];

  # Use the systemd-boot EFI boot loader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.timeout = 20;
  boot.loader.efi.canTouchEfiVariables = true;

  nix = {
    binaryCaches = [
      "http://binarycache.home.adnab.me"
    ];
    binaryCachePublicKeys = [
      "binarycache.home.adnab.me:ErR6pMnewf9oVyZJd5uC2nI4EZF49c7Mh86eDZWYZaw="
    ];
  };

  # 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.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

  # Route internet traffic via USB modem (=phone) on other computer
  networking.nameservers = [ "9.9.9.9" ];
  networking.defaultGateway = {
    address = "192.168.1.254";
    interface = "eno1";
  };

  # Set your time zone.
  time.timeZone = "Europe/Paris";

  networking.extraHosts = ''
192.168.1.21 cariacou
192.168.1.22 carcajou
192.168.1.23 caribou
192.168.1.23 binarycache
192.168.1.23 binarycache.home.adnab.me
  '';

  # Configure network proxy if necessary
  # networking.proxy.default = "http://user:password@proxy:port/";
  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";

  # Select internationalisation properties.
  # i18n.defaultLocale = "en_US.UTF-8";
  console = {
    font = "sun12x22";
    keyMap = "fr";
  };

  # Enable the X11 windowing system.
  # services.xserver.enable = true;

  # Configure keymap in X11
  # services.xserver.layout = "us";
  # services.xserver.xkbOptions = "eurosign:e";

  # Enable CUPS to print documents.
  # services.printing.enable = true;

  # Enable sound.
  # sound.enable = true;
  # hardware.pulseaudio.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.lx = {
    isNormalUser = true;
    extraGroups = [
      "wheel"    # Enable ‘sudo’ for the user.
      "video"    # Having fun with links -g
      "docker"   # Enable management of Docker containers
    ];
    openssh.authorizedKeys.keys = [
      # Keys for accessing nodes from outside
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJpaBZdYxHqMxhv2RExAOa7nkKhPBOHupMP3mYaZ73w9 lx@lindy"
      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDIDdVbA9fEdqSr5UJ77NnoIqDTVp8ca5kHExhZYI4ecBExFJfonJllXMBN9KdC4ukxtY8Ug47PcMOfMaTBZQc+e+KpvDWpkBt15Xpem3RCxmMBES79sLL7LgtAdBXc5mNaCX8EOEVixWKdarjvxRyf6py6the51G5muaiMpoj5fae4ZpRGjhGTPefzc7y7zRWBUUZ8pYHW774BIaK6XT9gn3hyHV+Occjl/UODXvodktk55YtnuPi8adXTYEsHrVVz8AkFhx+cr0U/U8vtQnsTrZG+JmgQLqpXVs0RDw5bE1RefEbMuYNKxutYKUe3L+ZJtDe0M0MqOFI8a4F5TxP5 katchup@konata"
      # SSH access between nodes
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINOxa/9nQfPOcUPdpAhiz3s73O/eCB8tevei/VKPyiIV lx@caribou"
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOrlp9pmE4cTirzBAYRfQP5DH2OXzVsKZe7lRO+MXg4Z lx@carcajou"
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIF+2D98laBfRGF90PlOlAo+MKmMnh1kX0Bx6Pzhf4Ym9 lx@cariacou"
    ];
  };

  users.extraUsers.root.openssh.authorizedKeys.keys = [
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJpaBZdYxHqMxhv2RExAOa7nkKhPBOHupMP3mYaZ73w9 lx@lindy"
  ];

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    vim
    tmux
    ncdu
    iotop
    jnettop
    nethogs
    wget
    htop
    links
    git
  ];

  programs.vim.defaultEditor = true;

  # 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;
  # };

  # List services that you want to enable:

  # Enable Yggdrasil networking
  services.yggdrasil.enable = true;
  services.yggdrasil.persistentKeys = true;
  services.yggdrasil.config = {
    Listen = [
      "tcp://0.0.0.0:54312"
    ];
    Peers = [
      "tcp://37.187.118.206:53102"
      "tcp://192.168.1.21:54312"
      "tcp://192.168.1.22:54312"
      "tcp://192.168.1.23:54312"
    ];
    MulticastInterfaces = [
      "eno1"
    ];
  };

  # Enable network time
  services.ntp.enable = true;

  # Enable the OpenSSH daemon.
  services.openssh.enable = true;

  # Enable netdata monitoring
  services.netdata.enable = true;

  # Enable Hashicorp Consul & Nomad
  services.consul.enable = true;
  services.consul.extraConfig =
    let public_ip = (builtins.head node_config.networking.interfaces.eno1.ipv4.addresses).address;
    in
  {
    datacenter = "neptune";
    bootstrap_expect = 3;
    server = true;
    ui = true;
    bind_addr = public_ip;
    addresses.http = "0.0.0.0";
    retry_join = [ "192.168.1.21" "192.168.1.22" "192.168.1.23" ];
  };

  services.nomad.enable = true;
  services.nomad.settings =
    let public_ip = (builtins.head node_config.networking.interfaces.eno1.ipv4.addresses).address;
    in
  {
    datacenter = "neptune";
    server = {
      enabled = true;
      bootstrap_expect = 3;
    };
    advertise = {
      rpc = public_ip;
      http = public_ip;
      serf = public_ip;
    };
    consul.address = "127.0.0.1:8500";
    client = {
      enabled = true;
      network_interface = "eno1";
    };
    plugin = [
      {
        docker = [
          {
            config = [
              {
                volumes.enabled = true;
              }
            ];
          }
        ];
      }
    ];
  };

  # Open ports in the firewall.
  networking.firewall.allowedTCPPorts = [
    22                      # SSH
    3900 3901               # Garage (internal RPC traffic)
    4646 4647 4648          # Nomad
    8500 8300 8301 8302     # Consul
    19999                   # Netdata
    54312                   # Yggdrasil
  ];
  networking.firewall.allowedUDPPorts = [
    4648                    # Nomad
    8301 8302               # Consul
  ];
  # 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 = "21.05"; # Did you read the comment?
}