79 lines
2.0 KiB
Nix
79 lines
2.0 KiB
Nix
{ config, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
let
|
|
cfg = config.sane.services.dyn-dns;
|
|
in
|
|
{
|
|
options = {
|
|
sane.services.dyn-dns = {
|
|
enable = mkOption {
|
|
default = false;
|
|
type = types.bool;
|
|
};
|
|
|
|
ipPath = mkOption {
|
|
default = "/var/lib/uninsane/wan.txt";
|
|
type = types.str;
|
|
description = "where to store the latest WAN IPv4 address";
|
|
};
|
|
|
|
ipCmd = mkOption {
|
|
default = "${pkgs.sane-scripts}/bin/sane-ip-check-router-wan";
|
|
type = types.path;
|
|
description = "command to run to query the current WAN IP";
|
|
};
|
|
|
|
interval = mkOption {
|
|
type = types.str;
|
|
default = "10min";
|
|
description = "systemd time string for how frequently to re-check the IP";
|
|
};
|
|
|
|
restartOnChange = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [];
|
|
description = "list of systemd unit files to restart when the IP changes";
|
|
};
|
|
};
|
|
};
|
|
|
|
config = mkIf cfg.enable {
|
|
systemd.services.dyn-dns = {
|
|
description = "update this host's record of its WAN IP";
|
|
after = [ "network.target" ];
|
|
restartTriggers = [(builtins.toJSON cfg)];
|
|
serviceConfig.Type = "oneshot";
|
|
script = ''
|
|
mkdir -p $(dirname "${cfg.ipPath}")
|
|
${cfg.ipCmd} > "${cfg.ipPath}"
|
|
'';
|
|
};
|
|
|
|
systemd.timers.dyn-dns = {
|
|
wantedBy = [ "multi-user.target" ];
|
|
timerConfig = {
|
|
OnStartupSec = cfg.interval;
|
|
OnUnitActiveSec = cfg.interval;
|
|
};
|
|
};
|
|
|
|
systemd.paths.dyn-dns-watcher = {
|
|
before = [ "dyn-dns.service" ];
|
|
wantedBy = [ "dyn-dns.service" ];
|
|
pathConfig = {
|
|
Unit = "dyn-dns-reactor.service";
|
|
PathChanged = [ cfg.ipPath ];
|
|
};
|
|
};
|
|
|
|
systemd.services.dyn-dns-reactor = {
|
|
description = "react to the system's WAN IP changing";
|
|
serviceConfig.Type = "oneshot";
|
|
script = if cfg.restartOnChange != [] then ''
|
|
${pkgs.systemd}/bin/systemctl restart ${toString cfg.restartOnChange}
|
|
'' else "${pkgs.coreutils}/bin/true";
|
|
};
|
|
};
|
|
}
|