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{ config, pkgs, lib, ... }:
let
inherit (lib) mkOption mkIf singleton;
inherit (pkgs) ddclient;
stateDir = "/var/spool/ddclient";
ddclientUser = "ddclient";
ddclientFlags = "-foreground -verbose -noquiet -file ${config.services.ddclient.configFile}";
ddclientPIDFile = "${stateDir}/ddclient.pid";
in
{
###### interface
options = {
services.ddclient = with lib.types; {
enable = mkOption {
default = false;
type = bool;
description = ''
Whether to synchronise your machine's IP address with a dynamic DNS provider (e.g. dyndns.org).
'';
};
domain = mkOption {
default = "";
type = str;
description = ''
Domain name to synchronize.
'';
};
username = mkOption {
default = "";
type = str;
description = ''
Username.
'';
};
password = mkOption {
default = "";
type = str;
description = ''
Password. WARNING: The password becomes world readable in the Nix store.
'';
};
configFile = mkOption {
default = "/etc/ddclient.conf";
type = path;
description = ''
Path to configuration file.
When set to the default '/etc/ddclient.conf' it will be populated with the various other options in this module. When it is changed (for example: '/root/nixos/secrets/ddclient.conf') the file read directly to configure ddclient. This is a source of impurity.
The purpose of this is to avoid placing secrets into the store.
'';
example = "/root/nixos/secrets/ddclient.conf";
};
protocol = mkOption {
default = "dyndns2";
type = str;
description = ''
Protocol to use with dynamic DNS provider (see http://sourceforge.net/apps/trac/ddclient/wiki/Protocols).
'';
};
server = mkOption {
default = "";
type = str;
description = ''
Server address.
'';
};
ssl = mkOption {
default = true;
type = bool;
description = ''
Whether to use to use SSL/TLS to connect to dynamic DNS provider.
'';
};
extraConfig = mkOption {
default = "";
type = str;
description = ''
Extra configuration. Contents will be added verbatim to the configuration file.
'';
};
use = mkOption {
default = "web, web=checkip.dyndns.com/, web-skip='Current IP Address: '";
type = str;
description = ''
Method to determine the IP address to send to the dynamic DNS provider.
'';
};
};
};
###### implementation
config = mkIf config.services.ddclient.enable {
environment.systemPackages = [ ddclient ];
users.extraUsers = singleton {
name = ddclientUser;
uid = config.ids.uids.ddclient;
description = "ddclient daemon user";
home = stateDir;
};
environment.etc."ddclient.conf" = {
enable = config.services.ddclient.configFile == /etc/ddclient.conf;
uid = config.ids.uids.ddclient;
mode = "0600";
text = ''
# This file can be used as a template for configFile or is automatically generated by Nix options.
daemon=600
cache=${stateDir}/ddclient.cache
pid=${ddclientPIDFile}
use=${config.services.ddclient.use}
login=${config.services.ddclient.username}
password=${config.services.ddclient.password}
protocol=${config.services.ddclient.protocol}
server=${config.services.ddclient.server}
ssl=${if config.services.ddclient.ssl then "yes" else "no"}
wildcard=YES
${config.services.ddclient.domain}
${config.services.ddclient.extraConfig}
'';
};
systemd.services.ddclient = {
description = "Dynamic DNS Client";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
restartTriggers = [ config.environment.etc."ddclient.conf".source ];
serviceConfig = {
# Uncomment this if too many problems occur:
# Type = "forking";
User = ddclientUser;
Group = "nogroup"; #TODO get this to work
PermissionsStartOnly = "true";
PIDFile = ddclientPIDFile;
ExecStartPre = ''
${pkgs.stdenv.shell} -c "${pkgs.coreutils}/bin/mkdir -m 0755 -p ${stateDir} && ${pkgs.coreutils}/bin/chown ${ddclientUser} ${stateDir}"
'';
ExecStart = "${ddclient}/bin/ddclient ${ddclientFlags}";
#ExecStartPost = "${pkgs.coreutils}/bin/rm -r ${stateDir}"; # Should we have this?
};
};
};
}
|