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nixpkgs/nixos/modules/system/boot/timesyncd.nix
Jörg Thalheim 1590461887 ntp: make timesyncd the new default
- most nixos user only require time synchronisation,
  while ntpd implements a battery-included ntp server (1,215 LOCs of C-Code vs 64,302)
- timesyncd support ntp server per interface (if configured through dhcp for instance)
- timesyncd is already included in the systemd package, switching to it would
  save a little disk space (1,5M)
2016-12-17 00:00:45 +01:00

46 lines
1.1 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
{
options = {
services.timesyncd = {
enable = mkOption {
default = !config.boot.isContainer;
type = types.bool;
description = ''
Enables the systemd NTP client daemon.
'';
};
servers = mkOption {
default = config.networking.timeServers;
description = ''
The set of NTP servers from which to synchronise.
'';
};
};
};
config = mkIf config.services.timesyncd.enable {
systemd.additionalUpstreamSystemUnits = [ "systemd-timesyncd.service" ];
systemd.services.systemd-timesyncd = {
wantedBy = [ "sysinit.target" ];
restartTriggers = [ config.environment.etc."systemd/timesyncd.conf".source ];
};
environment.etc."systemd/timesyncd.conf".text = ''
[Time]
NTP=${concatStringsSep " " config.services.ntp.servers}
'';
users.extraUsers.systemd-timesync.uid = config.ids.uids.systemd-timesync;
users.extraGroups.systemd-timesync.gid = config.ids.gids.systemd-timesync;
};
}