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{ pkgs, lib, config, options, ... }:
with lib;
let
cfg = config.services.openntpd;
package = pkgs.openntpd_nixos;
cfgFile = pkgs.writeText "openntpd.conf" ''
${concatStringsSep "\n" (map (s: "server ${s}") cfg.servers)}
${cfg.extraConfig}
'';
in
{
###### interface
options.services.openntpd = {
enable = mkEnableOption "OpenNTP time synchronization server";
servers = mkOption {
default = config.services.ntp.servers;
type = types.listOf types.str;
inherit (options.services.ntp.servers) description;
};
extraConfig = mkOption {
type = with types; lines;
default = "";
example = ''
listen on 127.0.0.1
listen on ::1
'';
description = ''
Additional text appended to <filename>openntpd.conf</filename>.
'';
};
extraOptions = mkOption {
type = with types; string;
default = "";
example = "-s";
description = ''
Extra options used when launching openntpd.
'';
};
};
###### implementation
config = mkIf cfg.enable {
services.ntp.enable = mkForce false;
# Add ntpctl to the environment for status checking
environment.systemPackages = [ package ];
users.extraUsers = singleton {
name = "ntp";
uid = config.ids.uids.ntp;
description = "OpenNTP daemon user";
home = "/var/empty";
};
systemd.services.openntpd = {
description = "OpenNTP Server";
wantedBy = [ "multi-user.target" ];
wants = [ "network-online.target" "time-sync.target" ];
before = [ "time-sync.target" ];
after = [ "dnsmasq.service" "bind.service" "network-online.target" ];
serviceConfig.ExecStart = "${package}/sbin/ntpd -d -f ${cfgFile} ${cfg.extraOptions}";
};
};
}
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