nixos-config/modules/default.nix

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# SPDX-FileCopyrightText: 2020-2024 Simon Bruder <simon@sbruder.de>
#
# SPDX-License-Identifier: AGPL-3.0-or-later
{ config, lib, options, pkgs, ... }:
{
# Options that affect multiple modules
options.sbruder = {
full = lib.mkOption {
type = lib.types.bool;
description = ''
Whether to build the full system. If disabled, the system closure will
be smaller, but some features will not be available.
'';
default = true;
};
trusted = (lib.mkEnableOption "the trusted status of this machine (i.e. encrypted root)") // { default = true; };
gui.enable = lib.mkEnableOption "gui";
machine = {
isVm = lib.mkOption {
type = lib.types.bool;
description = "Whether this machine is a virtual machine.";
default = false;
};
};
};
# All modules are imported but non-essential modules are activated by
# configuration options
imports = [
../pkgs/modules.nix
./ausweisapp.nix
./authoritative-dns.nix
./cups.nix
./docker.nix
./fancontrol.nix
./flatpak.nix
./fonts.nix
./games.nix
./grub.nix
./gui.nix
./infovhost.nix
./initrd-ssh.nix
./locales.nix
./logitech.nix
./mailserver
./media-mount.nix
./media-proxy.nix
./mullvad
./network-manager.nix
./nginx-interactive-index
./nginx.nix
./nitrokey.nix
./nix.nix
./office.nix
./pipewire.nix
./prometheus/node_exporter.nix
./pubkeys.nix
./qbittorrent
./restic
./secrets.nix
./ssh.nix
./static-webserver.nix
./syncthing.nix
./tmux.nix
./tools.nix
./udev.nix
./unfree.nix
./wireguard
./wkd
];
config = lib.mkMerge [
{
# Essential system tools
environment.systemPackages = with pkgs; [
git
git-crypt # used to store secrets in configuration
git-lfs # not so essential, but required to clone config
htop
tmux
vim
];
# Clean temporary files on boot
boot.tmp.cleanOnBoot = true;
# Set zsh as default shell with reasonable default config for all users
programs.zsh = {
enable = true;
loginShellInit = ''
# do not glob # (conflicts with nix flakes)
disable -p '#'
'';
histSize = 100000;
};
users.defaultUserShell = pkgs.zsh;
environment.etc."zshrc.local".source = "${pkgs.grml-zsh-config}/etc/zsh/zshrc";
# command-not-found does not work without channels
programs.command-not-found.enable = false;
# Network monitoring
services.vnstat.enable = true;
environment.etc."vnstat.conf".text = ''
UseUTC=1
'';
# Support for exotic file systems
boot.supportedFilesystems = lib.optional config.sbruder.full "ntfs";
programs.ssh.startAgent = lib.mkDefault (!config.sbruder.gui.enable);
# When this is set to true (default), routing everything through a
# wireguard tunnel does not work.
networking.firewall.checkReversePath = false;
# Open ports for quick tests
networking.firewall = {
allowedTCPPortRanges = lib.singleton { from = 9990; to = 9999; };
allowedUDPPortRanges = lib.singleton { from = 9990; to = 9999; };
};
# Use nftables by default,
# but allow it to be easily disabled on by-machine basis.
networking.nftables.enable = lib.mkDefault true;
# Globally set Lets Encrypt requirements
security.acme = {
acceptTerms = true;
defaults = {
email = "security@sbruder.de";
};
};
system.activationScripts.diff = ''
[ -L /run/current-system ] && ${config.nix.package}/bin/nix \
--experimental-features 'nix-command' \
store \
diff-closures /run/current-system "$systemConfig"
'';
# Allow users to set allow_other for fuse mounts
programs.fuse.userAllowOther = true;
i18n.supportedLocales = (options.i18n.supportedLocales.default) ++ (lib.optionals config.sbruder.full [
"de_DE.UTF-8/UTF-8"
]);
services.resolved = {
# Set systemd-resolveds fallback to Quad9 (instead of cloudflare/google)
fallbackDns = [ "9.9.9.9" "149.112.112.112" "2620:fe::fe" "2620:fe::9" ];
# Allow resolving single lable hostnames (e.g., hostnames on the local network)
llmnr = "false";
# resolved does not automatically append the search domain (for whatever reason)
extraConfig = ''
ResolveUnicastSingleLabel=yes
Cache=no-negative
'';
};
}
(lib.mkIf (!config.sbruder.machine.isVm) {
# Hard drive monitoring
services.smartd.enable = lib.mkDefault true;
# Firmware updates
services.fwupd.enable = lib.mkDefault true;
})
(lib.mkIf (!config.sbruder.full) {
documentation.enable = lib.mkDefault false;
})
(lib.mkIf (config.services.resolved.enable) {
# With NixOSs default database order for hosts,
# resolving the FQDN with hostname -f always returns “localhost”
# when resolved is enabled.
# This changes the priority of the files database,
# which fixes this.
# This workaround was taken from
# https://github.com/NixOS/nixpkgs/issues/132646#issuecomment-1782684381
system.nssDatabases.hosts = lib.mkOrder 500 [ "files" ];
})
];
}