nixos-config/config/hardware/nutboy3.nix

{ config, lib, pkgs, ... }:

with lib; {
  boot = {
    initrd = {
      availableKernelModules =
        [ "ehci_pci" "ahci" "isci" "usbhid" "usb_storage" "sd_mod" ];
      kernelModules = [ "dm-snapshot" ];
    };
    kernelModules = [ "kvm-intel" ];
    extraModulePackages = [ ];
    loader.grub = {
      enable = true;
      device = "/dev/sda";
    };

    supportedFilesystems = [ "btrfs" ];
  };

  system.stateVersion = "21.11";

  fileSystems = {
    "/" = {
      device = "root-tmpfs";
      fsType = "tmpfs";
      options = [ "mode=755" "noexec" ];
    };

    "/boot" = {
      device = "/dev/disk/by-label/boot";
      fsType = "ext4";
      options = [ "noexec" "noatime" "nodiratime" ];
    };

    "/nix" = {
      device = "/dev/disk/by-label/data";
      fsType = "btrfs";
      options = [ "subvol=@nix" "compress=zstd" "noatime" "nodiratime" ];
    };

    "/var/log" = {
      device = "/dev/disk/by-label/data";
      fsType = "btrfs";
      options =
        [ "subvol=@logs" "compress=zstd" "noatime" "nodiratime" "noexec" ];
      neededForBoot = true;
    };

    "/state" = {
      device = "/dev/disk/by-label/data";
      fsType = "btrfs";
      options =
        [ "subvol=@state" "compress=zstd" "noatime" "nodiratime" "noexec" ];
    };

    "/var/lib/acme" = {
      device = "/dev/disk/by-label/data";
      fsType = "btrfs";
      options =
        [ "subvol=@acme" "compress=zstd" "noatime" "nodiratime" "noexec" ];
    };

    "/var/lib/prometheus" = {
      device = "/dev/disk/by-label/data";
      fsType = "btrfs";
      options = [
        "subvol=@prometheus"
        "compress=zstd"
        "noatime"
        "nodiratime"
        "noexec"
      ];
    };
  };

  swapDevices = [{ device = "/dev/disk/by-label/swap"; }];

  networking = {
    macvlans = {
      extif0 = {
        interface = "eno1";
        mode = "bridge";
      };
    };

    useDHCP = false;

    interfaces = {
      extif0 = {
        macAddress =
          pkgs.lib.network.generate-mac-address config.instance.hostname
          "extif0";
      };
    };
  };
}