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Merge pull request #108578 from ctem/feature/chrony

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nixos/chrony: add support for Network Time Security (NTS) authentication
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Anderson Torres 2021-01-22 09:36:08 -03:00 committed by GitHub
commit 0f31f03f22
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1 changed files with 45 additions and 5 deletions
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50
nixos/modules/services/networking/ntp/chrony.nix
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@ -4,13 +4,14 @@ with lib;
let
cfg = config.services.chrony;
chronyPkg = cfg.package;
stateDir = "/var/lib/chrony";
stateDir = cfg.directory;
driftFile = "${stateDir}/chrony.drift";
keyFile = "${stateDir}/chrony.keys";
configFile = pkgs.writeText "chrony.conf" ''
${concatMapStringsSep "\n" (server: "server " + server + " iburst") cfg.servers}
${concatMapStringsSep "\n" (server: "server " + server + " " + cfg.serverOption + optionalString (cfg.enableNTS) " nts") cfg.servers}
${optionalString
(cfg.initstepslew.enabled && (cfg.servers != []))
@ -19,6 +20,7 @@ let
driftfile ${driftFile}
keyfile ${keyFile}
${optionalString (cfg.enableNTS) "ntsdumpdir ${stateDir}"}
${optionalString (!config.time.hardwareClockInLocalTime) "rtconutc"}
@ -39,6 +41,15 @@ in
'';
};
package = mkOption {
type = types.package;
default = pkgs.chrony;
defaultText = "pkgs.chrony";
description = ''
Which chrony package to use.
'';
};
servers = mkOption {
default = config.networking.timeServers;
type = types.listOf types.str;
@ -47,6 +58,29 @@ in
'';
};
serverOption = mkOption {
default = "iburst";
type = types.enum [ "iburst" "offline" ];
description = ''
Set option for server directives.
Use "iburst" to rapidly poll on startup. Recommended if your machine
is consistently online.
Use "offline" to prevent polling on startup. Recommended if your
machine boots offline or is otherwise frequently offline.
'';
};
enableNTS = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable Network Time Security authentication.
Make sure it is supported by your selected NTP server(s).
'';
};
initstepslew = mkOption {
default = {
enabled = true;
@ -59,6 +93,12 @@ in
'';
};
directory = mkOption {
type = types.str;
default = "/var/lib/chrony";
description = "Directory where chrony state is stored.";
};
extraConfig = mkOption {
type = types.lines;
default = "";
@ -80,7 +120,7 @@ in
config = mkIf cfg.enable {
meta.maintainers = with lib.maintainers; [ thoughtpolice ];
environment.systemPackages = [ pkgs.chrony ];
environment.systemPackages = [ chronyPkg ];
users.groups.chrony.gid = config.ids.gids.chrony;
@ -110,12 +150,12 @@ in
after = [ "network.target" ];
conflicts = [ "ntpd.service" "systemd-timesyncd.service" ];
path = [ pkgs.chrony ];
path = [ chronyPkg ];
unitConfig.ConditionCapability = "CAP_SYS_TIME";
serviceConfig =
{ Type = "simple";
ExecStart = "${pkgs.chrony}/bin/chronyd ${chronyFlags}";
ExecStart = "${chronyPkg}/bin/chronyd ${chronyFlags}";
ProtectHome = "yes";
ProtectSystem = "full";