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# 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, ... }:
{
imports =
[ # Include the results of the hardware scan.
./hardware-configuration.nix
];
nix.settings.experimental-features = [ "nix-command" "flakes" ];
nix.settings.trusted-users = [ "joe" ];
boot.loader.systemd-boot.enable = true;
# Raspberry Pi has no NVRAM.
boot.loader.efi.canTouchEfiVariables = false;
boot.kernelPackages = pkgs.linuxPackages_rpi4;
# https://github.com/NixOS/nixpkgs/issues/122130#issuecomment-1568815007
# It's unclear if these are strictly necessary with the downstream kernel,
# but let's leave them in to keep working with mainline.
boot.initrd.availableKernelModules = [ "uas" "pcie-brcmstb" "reset-raspberrypi" ];
networking.hostName = "weebnix";
networking.domain = "mou.fo";
# TODO secrets management or switch to wired
networking.wireless = {
enable = true;
networks."oldschool".psk = builtins.readFile /var/lib/secrets/oldschool.wpa-psk;
};
time.timeZone = "America/New_York";
# Select internationalisation properties.
# i18n.defaultLocale = "en_US.UTF-8";
# console = {
# font = "Lat2-Terminus16";
# keyMap = "us";
# useXkbConfig = true; # use xkbOptions in tty.
# };
security.sudo.wheelNeedsPassword = false;
users.users.joe = {
isNormalUser = true;
extraGroups = [ "wheel" ];
openssh.authorizedKeys.keys = [
"ssh-rsa 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 joe@sparky"
];
# packages = with pkgs; [
# firefox
# tree
# ];
};
environment.systemPackages = with pkgs; [
libraspberrypi
tmux
vim
];
# 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;
# };
# Needs to be started manually, and the key added to nameservers.
# Based on https://nixos.org/manual/nixos/stable/index.html#module-security-acme-config-dns
systemd.services.sig0-keygen = {
unitConfig = {
ConditionPathExists = "!/var/lib/secrets/${config.networking.fqdn}.id";
};
serviceConfig = {
Type = "oneshot";
};
path = [ pkgs.bind ];
scriptArgs = config.networking.fqdn;
script = ''
mkdir -p /var/lib/secrets
chmod 755 /var/lib/secrets
cd /var/lib/secrets
dnssec-keygen -a RSASHA512 -b 2048 -n HOST -T KEY $1. > $1.id
'';
};
systemd.services.dyndns = {
requires = [ "network-online.target" ];
after = [ "network-online.target" ];
unitConfig = {
AssertPathExists = "/var/lib/secrets/${config.networking.fqdn}.id";
# Defer errors for ~45min, throttle e-mails to ~hourly.
StartLimitIntervalSec = "1hr";
StartLimitBurst = "45";
};
serviceConfig = {
Type = "oneshot";
Restart = "on-failure";
RestartSec = "1min";
};
path = [ pkgs.dnsutils ];
scriptArgs = config.networking.fqdn;
script = ''
RR=''${1%%.*}.dynamic.''${1#*.}
IP=`dig +short @1.1.1.1 ch txt whoami.cloudflare | tr -d \"`
if [ -z "$IP" ]; then
echo "Missing IP: $IP" >&2
exit 100
fi
OLDIP=`dig +short @popfresh.mou.fo $RR A 2> /dev/null`
[ "x$IP" = "x$OLDIP" ] && exit 0 # no update
nsupdate -v -k /var/lib/secrets/`< /var/lib/secrets/$1.id`.private <<.
update delete $RR. A
update add $RR. 300 A $IP
update delete $RR. TXT
update add $RR. 300 TXT "v=spf1 include:_spf.mou.fo ~all"
send
.
'';
};
systemd.timers.dyndns = {
wantedBy = [ "multi-user.target" ];
timerConfig = {
OnStartupSec = "10";
OnUnitActiveSec = "1min";
};
};
services.avahi = {
enable = true;
nssmdns = true;
};
services.openssh.enable = true;
# Open ports in the firewall.
# networking.firewall.allowedTCPPorts = [ ... ];
# networking.firewall.allowedUDPPorts = [ ... ];
# Or disable the firewall altogether.
# networking.firewall.enable = false;
# Copy the NixOS configuration file and link it from the resulting system
# (/run/current-system/configuration.nix). This is useful in case you
# accidentally delete configuration.nix.
# system.copySystemConfiguration = true;
# 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 = "23.05"; # Did you read the comment?
}
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