diff options
Diffstat (limited to 'nixos/modules/system/boot/timesyncd.nix')
-rw-r--r-- | nixos/modules/system/boot/timesyncd.nix | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/nixos/modules/system/boot/timesyncd.nix b/nixos/modules/system/boot/timesyncd.nix new file mode 100644 index 00000000000..5f35a154769 --- /dev/null +++ b/nixos/modules/system/boot/timesyncd.nix @@ -0,0 +1,74 @@ +{ config, lib, ... }: + +with lib; + +{ + + options = { + + services.timesyncd = { + enable = mkOption { + default = !config.boot.isContainer; + defaultText = literalExpression "!config.boot.isContainer"; + type = types.bool; + description = '' + Enables the systemd NTP client daemon. + ''; + }; + servers = mkOption { + default = config.networking.timeServers; + defaultText = literalExpression "config.networking.timeServers"; + type = types.listOf types.str; + description = '' + The set of NTP servers from which to synchronise. + ''; + }; + extraConfig = mkOption { + default = ""; + type = types.lines; + example = '' + PollIntervalMaxSec=180 + ''; + description = '' + Extra config options for systemd-timesyncd. See + <link xlink:href="https://www.freedesktop.org/software/systemd/man/timesyncd.conf.html"> + timesyncd.conf(5)</link> for available options. + ''; + }; + }; + }; + + config = mkIf config.services.timesyncd.enable { + + systemd.additionalUpstreamSystemUnits = [ "systemd-timesyncd.service" ]; + + systemd.services.systemd-timesyncd = { + wantedBy = [ "sysinit.target" ]; + aliases = [ "dbus-org.freedesktop.timesync1.service" ]; + restartTriggers = [ config.environment.etc."systemd/timesyncd.conf".source ]; + }; + + environment.etc."systemd/timesyncd.conf".text = '' + [Time] + NTP=${concatStringsSep " " config.services.timesyncd.servers} + ${config.services.timesyncd.extraConfig} + ''; + + users.users.systemd-timesync = { + uid = config.ids.uids.systemd-timesync; + group = "systemd-timesync"; + }; + users.groups.systemd-timesync.gid = config.ids.gids.systemd-timesync; + + system.activationScripts.systemd-timesyncd-migration = mkIf (versionOlder config.system.stateVersion "19.09") '' + # workaround an issue of systemd-timesyncd not starting due to upstream systemd reverting their dynamic users changes + # - https://github.com/NixOS/nixpkgs/pull/61321#issuecomment-492423742 + # - https://github.com/systemd/systemd/issues/12131 + if [ -L /var/lib/systemd/timesync ]; then + rm /var/lib/systemd/timesync + mv /var/lib/private/systemd/timesync /var/lib/systemd/timesync + fi + ''; + }; + +} |