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;
    site_config = import ./site.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
      # Configuration local for this Deuxfleurs site (set of nodes)
      ./site.nix
    ];

  # 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.

  # Networking configuration (static IPs for each node is defined in node/*.nix)
  networking.nameservers = [ "9.9.9.9" ];

  # Wireguard VPN configuration
  networking.wireguard.interfaces.wg0 = {
    privateKeyFile = "/root/wireguard-keys/private";
    peers = [
      { # Hammerhead
        publicKey = "b5hF+GSTgg3oM6wnjL7jRbfyf1jtsWdVptPPbAh3Qic=";
        allowedIPs = [ "10.42.0.1/32" ];
        endpoint = "5.135.179.11:51349";
        persistentKeepalive = 25;
      }
      { # Spoutnik
        publicKey = "fO8qZOZmnug84cA8nvfjl5MUqyWljP0BAz/4tHRZyEg=";
        allowedIPs = [ "10.42.0.2/32" ];
        endpoint = "77.141.67.109:42136";
        persistentKeepalive = 25;
      }
      { # Robinson
        publicKey = "ETaZFil3mFXlJ0LaJZyWqJVLV2IZUF5PB/8M7WbQSTg=";
        allowedIPs = [ "10.42.0.42/32" ];
        endpoint = "77.141.67.109:33742";
        persistentKeepalive = 25;
      }
      { # Shiki
        publicKey = "QUiUNMk70TEQ75Ut7Uqikr5uGVSXmx8EGNkGM6tANlg=";
        allowedIPs = [ "10.42.0.206/32" ];
        endpoint = "37.187.118.206:51820";
        persistentKeepalive = 25;
      }
      { # Lindy
        publicKey = "wen9GnZy2iLT6RyHfn7ydS/wvdvow1XPmhZxIkrDbks=";
        allowedIPs = [ "10.42.0.66/32" ];
        endpoint = "82.66.112.151:33766";
        persistentKeepalive = 25;
      }
      { # Carcajou
        publicKey = "qxrtfn2zRVnN52Y5NYumyU3/FcRMnh3kJ2C37JfrczA=";
        allowedIPs = [ "10.42.0.21/32" ];
        endpoint = "82.66.112.151:33721";
        persistentKeepalive = 25;
      }
      { # Carcajou
        publicKey = "7Nm7pMmyS7Nts1MB+loyD8u84ODxHPTkDu+uqQR6yDk=";
        allowedIPs = [ "10.42.0.22/32" ];
        endpoint = "82.66.112.151:33722";
        persistentKeepalive = 25;
      }
      { # Caribou
        publicKey = "g6ZED/wPn5MPfytJKwPI19808CXtEad0IJUkEAAzwyY=";
        allowedIPs = [ "10.42.0.23/32" ];
        endpoint = "82.66.112.151:33723";
        persistentKeepalive = 25;
      }
    ];
  };

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

  networking.extraHosts = ''
192.168.1.21 cariacou.lan
192.168.1.22 carcajou.lan
192.168.1.23 caribou.lan
10.42.0.1 hammerhead
10.42.0.2 spoutnik
10.42.0.21 cariacou
10.42.0.22 carcajou
10.42.0.23 caribou
10.42.0.66 lindy
10.42.0.206 shiki
  '';

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

  # Enable sound.
  # sound.enable = true;
  # hardware.pulseaudio.enable = true;

  # Define user accounts
  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"
    ];
  };

  users.users.quentin = {
    isNormalUser = true;
    extraGroups = [ "wheel" "docker" ];
    openssh.authorizedKeys.keys = [
      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDT1+H08FdUSvdPpPKdcafq4+JRHvFVjfvG5Id97LAoROmFRUb/ZOMTLdNuD7FqvW0Da5CPxIMr8ZxfrFLtpGyuG7qdI030iIRZPlKpBh37epZHaV+l9F4ZwJQMIBO9cuyLPXgsyvM/s7tDtrdK1k7JTf2EVvoirrjSzBaMhAnhi7//to8zvujDtgDZzy6aby75bAaDetlYPBq2brWehtrf9yDDG9WAMYJqp//scje/WmhbRR6eSdim1HaUcWk5+4ZPt8sQJcy8iWxQ4jtgjqTvMOe5v8ZPkxJNBine/ZKoJsv7FzKem00xEH7opzktaGukyEqH0VwOwKhmBiqsX2yN quentin@dufour.io"
      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDBu+KUebaWwlugMC5fGbNhHc6IaQDAC6+1vMc4Ww7nVU1rs2nwI7L5qcWxOwNdhFaorZQZy/fJuCWdFbF61RCKGayBWPLZHGPsfqDuggYNEi1Qil1kpeCECfDQNjyMTK058ZBBhOWNMHBjlLWXUlRJDkRBBECY0vo4jRv22SvSaPUCAnkdJ9rbAp/kqb497PTIb2r1l1/ew8YdhINAlpYQFQezZVfkZdTKxt22n0QCjhupqjfh3gfNnbBX0z/iO+RvAOWRIZsjPFLC+jXl+n7cnu2cq1nvST5eHiYfXXeIgIwmeENLKqp+2Twr7PIdv22PnJkh6iR5kx7eTRxkNZdN quentin@deuxfleurs.fr"
    ];
  };

  users.users.adrien = {
    isNormalUser = true;
    extraGroups = [ "wheel" "docker" ];
    openssh.authorizedKeys.keys = [
      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDBfVX+iQSHl3V0el3/y2Rtl9Q/nrmLoTE3oXnR+16yX7g8HvzU871q89jbE/UWvNRvO4hirTcKF8yojuq8ZRCoUcQO+6/YlPrY/2G8kFhPTlUGDQ+mLT+ancZsom4mkg3I9oQjKZ9qxMD1GuU8Ydz4eXjhJ8OGFZhBpEgnrLmdA53Y5d2fCbaZN5EYD4sWEFYN7xBLxTGNwv0gygiPs967Z4/ZfHngTvqVoS9wnQThSCIoXPTWFAJCkN8dC5tPZwnbOT1bGcYUF0VTrcaD6cU6Q1ZRrtyqXxnnyxpQCAoe2hgdIm+LnDsBx9trfPauqi0dXi36X8pLmudW1f1RmKWT adrien@bacigalupi"
    ];
  };

  users.users.maximilien = {
    isNormalUser = true;
    extraGroups = [ "wheel" "docker" ];
    openssh.authorizedKeys.keys = [
      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDHMMR6zNzz8NQU80wFquhUCeiXJuGphjP+zNouKbn228GyESu8sfNBwnuZq86vblR11Lz8l2rtCM73GfAKg29qmUWUHRKWvRIYWv2vaUJcCdy0bAxIzcvCvjZX0SpnIKxe9y3Rp0LGO5WLYfw0ZFaavwFZP0Z8w1Kj9/zBmL2X2avbhkaYHi/C1yXhbvESYQysmqLa48EX/TS616MBrgR9zbI9AoTQ9NOHnR14Tve/AP/khcZoBJdm4hTttMbNkEc0wonzdylTDew263SPRs/uoqnQIpUtErdPHqU10Yup8HjXjEyFJsSwcZcM5sZOw5JKckKJwmcd0yjO/x/4/Mk5"
    ];
  };

  users.users.kokakiwi = {
    isNormalUser = true;
    extraGroups = [ "wheel" "docker" ];
    openssh.authorizedKeys.keys = [
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFPTsEgcOtb2bij+Ih8eg8ZqO7d3IMiWykv6deMzlSSS kokakiwi@kira"
    ];
  };

  # Passwordless sudo
  security.sudo.wheelNeedsPassword = false;

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

  programs.vim.defaultEditor = true;

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

  # Enable the OpenSSH daemon and disable password login.
  services.openssh.enable = true;
  services.openssh.passwordAuthentication = false;

  # ---- CONFIG FOR DEUXFLEURS CLUSTER ----

  # Enable Hashicorp Consul & Nomad
  services.consul.enable = true;
  services.consul.extraConfig =
    let public_ip = (builtins.head (builtins.split "/" (builtins.head node_config.networking.wireguard.interfaces.wg0.ips)));
    in
    (if node_config.services.consul.extraConfig.server or false
    then { bootstrap_expect = 3; }
    else {}) //
  {
    datacenter = "staging";
    ui = true;
    bind_addr = public_ip;
    addresses.http = "0.0.0.0";
    retry_join = [ "10.42.0.2" "10.42.0.21" "10.42.0.22" "10.42.0.23" ];
  };

  services.nomad.enable = true;
  services.nomad.package = pkgs.nomad_1_1;
  services.nomad.settings =
    let public_ip = (builtins.head (builtins.split "/" (builtins.head node_config.networking.wireguard.interfaces.wg0.ips)));
    in
    (if node_config.services.nomad.settings.server.enabled or false
    then { server = { bootstrap_expect = 3; }; }
    else {}) //
  {
    region = "staging";
    advertise = {
      rpc = public_ip;
      http = public_ip;
      serf = public_ip;
    };
    consul.address = "127.0.0.1:8500";
    client = {
      enabled = true;
      network_interface = "wg0";
    };
    plugin = [
      {
        docker = [
          {
            config = [
              {
                volumes.enabled = true;
                allow_privileged = true;
              }
            ];
          }
        ];
      }
    ];
  };

  # Mount Garage using Rclone
  systemd.services.mountgarage = {
    enable = true;
    description = "Mount the Garage data store";
    path = [
      pkgs.fuse
      pkgs.rclone
    ];
    unitConfig = {
      Type = "simple";
    };
    serviceConfig = {
      ExecStartPre = "${pkgs.bash}/bin/sh -c \"mkdir -p /mnt/garage-staging; fusermount -u /mnt/garage-staging || exit 0\"";
      ExecStart = "${pkgs.rclone}/bin/rclone --config /root/rclone.conf mount --vfs-cache-mode full --vfs-cache-max-size 1G --cache-dir /root/mountgarage-cache staging: /mnt/garage-staging";
    };
    wantedBy = [ "multi-user.target" ];
  };

  # Open ports in the firewall.
  networking.firewall = {
    enable = true;

    # Allow anyone to connect on SSH port
    allowedTCPPorts = [
      (builtins.head ({ openssh.ports = [22]; } // node_config.services).openssh.ports)
    ];

    # Allow anyone to contact Wireguard VPN server
    allowedUDPPorts = [
      node_config.networking.wireguard.interfaces.wg0.listenPort
    ];

    # Allow specific hosts access to specific things in the cluster
    extraCommands = ''
      # Allow everything from router (usefull for UPnP/IGD)
      iptables -A INPUT -s 192.168.1.254 -j ACCEPT

      # Allow Docker containers to access a few things
      iptables -N CONTAINERS
      iptables -A INPUT -s 172.17.0.0/16 -j CONTAINERS

      # Yugabyte YSQL
      iptables -A CONTAINERS -p tcp --dport 5433 -j ACCEPT

      # Specific rules for VPN nodes
      iptables -N VPN
      iptables -A INPUT -s 10.42.0.0/16 -j VPN

      # Allow server nodes to communicate between themselves on all ports
      iptables -A VPN -s 10.42.0.2 -j ACCEPT
      iptables -A VPN -s 10.42.0.21 -j ACCEPT
      iptables -A VPN -s 10.42.0.22 -j ACCEPT
      iptables -A VPN -s 10.42.0.23 -j ACCEPT

      # Allow all VPN users to access Nomad API
      iptables -A VPN -p tcp --dport 4646 -j ACCEPT

      # Same for Consul API
      iptables -A VPN -p tcp --dport 8500 -j ACCEPT

      # Same for YugabyteDB YSQL and Admin ports
      iptables -A VPN -p tcp --dport 5433 -j ACCEPT
      iptables -A VPN -p tcp --dport 7000 -j ACCEPT

      # Same for Netdata monitoring
      iptables -A VPN -p tcp --dport 19999 -j ACCEPT
    '';

    # When stopping firewall, delete all rules that were configured manually above
    extraStopCommands = ''
      iptables -D INPUT -s 192.168.1.254 -j ACCEPT
      iptables -D INPUT -s 10.42.0.0/16 -j VPN
      iptables -F VPN
      iptables -X VPN
      iptables -D INPUT -s 172.17.0.0/16 -j CONTAINERS
      iptables -F CONTAINERS
      iptables -X CONTAINERS
    '';
  };

  # 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?
}