29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
125 lines
3.0 KiB
Nix
125 lines
3.0 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.syslogd;
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syslogConf = pkgs.writeText "syslog.conf" ''
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${if (cfg.tty != "") then "kern.warning;*.err;authpriv.none /dev/${cfg.tty}" else ""}
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${cfg.defaultConfig}
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${cfg.extraConfig}
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'';
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defaultConf = ''
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# Send emergency messages to all users.
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*.emerg *
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# "local1" is used for dhcpd messages.
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local1.* -/var/log/dhcpd
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mail.* -/var/log/mail
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*.=warning;*.=err -/var/log/warn
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*.crit /var/log/warn
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*.*;mail.none;local1.none -/var/log/messages
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'';
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in
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{
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###### interface
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options = {
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services.syslogd = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to enable syslogd. Note that systemd also logs
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syslog messages, so you normally don't need to run syslogd.
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'';
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};
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tty = mkOption {
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type = types.str;
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default = "tty10";
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description = ''
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The tty device on which syslogd will print important log
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messages. Leave this option blank to disable tty logging.
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'';
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};
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defaultConfig = mkOption {
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type = types.lines;
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default = defaultConf;
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description = ''
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The default <filename>syslog.conf</filename> file configures a
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fairly standard setup of log files, which can be extended by
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means of <varname>extraConfig</varname>.
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'';
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};
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enableNetworkInput = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Accept logging through UDP. Option -r of syslogd(8).
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'';
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};
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extraConfig = mkOption {
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type = types.lines;
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default = "";
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example = "news.* -/var/log/news";
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description = ''
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Additional text appended to <filename>syslog.conf</filename>,
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i.e. the contents of <varname>defaultConfig</varname>.
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'';
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};
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extraParams = mkOption {
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type = types.listOf types.string;
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default = [ ];
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example = [ "-m 0" ];
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description = ''
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Additional parameters passed to <command>syslogd</command>.
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'';
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};
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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environment.systemPackages = [ pkgs.sysklogd ];
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services.syslogd.extraParams = optional cfg.enableNetworkInput "-r";
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# FIXME: restarting syslog seems to break journal logging.
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systemd.services.syslog =
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{ description = "Syslog Daemon";
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requires = [ "syslog.socket" ];
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wantedBy = [ "multi-user.target" ];
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serviceConfig =
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{ ExecStart = "${pkgs.sysklogd}/sbin/syslogd ${toString cfg.extraParams} -f ${syslogConf} -n";
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# Prevent syslogd output looping back through journald.
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StandardOutput = "null";
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};
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};
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};
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}
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