Refactoring of the machines

machines/lambda/default.nix

@@ -0,0 +1,83 @@
+{ config, pkgs, lib, ... }:
+{
+
+
+  imports = [ ../../users/status.nix ];
+  # NixOS wants to enable GRUB by default
+  boot.loader.grub.enable = false;
+
+  # if you have a Raspberry Pi 2 or 3, pick this:
+  boot.kernelPackages = pkgs.linuxPackages_latest;
+  networking.hostName = "lambda";
+  # A bunch of boot parameters needed for optimal runtime on RPi 3b+
+  boot.kernelParams = [ "cma=256M" ];
+  boot.loader.raspberryPi.enable = true;
+  boot.loader.raspberryPi.version = 3;
+  boot.loader.raspberryPi.uboot.enable = true;
+  boot.loader.raspberryPi.firmwareConfig = ''
+    gpu_mem=256
+  '';
+  environment.systemPackages = with pkgs; [
+    libraspberrypi
+    tinystatus
+    git
+  ];
+
+  # File systems configuration for using the installer's partition layout
+  fileSystems = {
+    "/" = {
+      device = "/dev/disk/by-label/NIXOS_SD";
+      fsType = "ext4";
+    };
+  };
+
+
+  networking.interfaces.eth0.useDHCP = false;
+  networking.interfaces.eth0.ipv4.addresses = [
+    {
+      address = "129.199.134.202";
+      prefixLength = 24;
+    }
+  ];
+  networking.defaultGateway = "129.199.134.254";
+  networking.nameservers = [ "8.8.8.8" ];
+  
+  services.timesyncd.enable = true;
+  systemd.services.htpdate = {
+      description = "htpdate daemon";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+      serviceConfig = {
+        Type = "forking";
+        PIDFile = "/run/htpdate.pid";
+        ExecStart = lib.concatStringsSep " " [
+          "${pkgs.htpdate}/bin/htpdate"
+          "-D -u nobody"
+          "-a -s"
+          "-l"
+          "www.linux.org"
+        ];
+      };
+    };
+
+  documentation.nixos.enable = false;
+  nix.gc.automatic = true;
+  nix.gc.options = "--delete-older-than 30d";
+  boot.cleanTmpDir = true;
+  luj.status = {
+    enable = true;
+    nginx = {
+      enable = true;
+      subdomain = "status";
+    };
+  };
+  # Configure basic SSH access
+  services.openssh.enable = true;
+  #  services.openssh.permitRootLogin = "yes";
+
+  # Use 1GB of additional swap memory in order to not run out of memory
+  # when installing lots of things while running other things at the same time.
+  swapDevices = [{ device = "/swapfile"; size = 1024; }];
+
+  luj.hmgr.status = { };
+}