127 lines
3.1 KiB
Nix
127 lines
3.1 KiB
Nix
{ config, lib, pkgs, ... }:
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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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${lib.optionalString (cfg.tty != "") "kern.warning;*.err;authpriv.none /dev/${cfg.tty}"}
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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 = lib.mkOption {
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type = lib.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 = lib.mkOption {
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type = lib.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 = lib.mkOption {
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type = lib.types.lines;
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default = defaultConf;
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description = ''
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The default {file}`syslog.conf` file configures a
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fairly standard setup of log files, which can be extended by
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means of {var}`extraConfig`.
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'';
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};
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enableNetworkInput = lib.mkOption {
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type = lib.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 = lib.mkOption {
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type = lib.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 {file}`syslog.conf`,
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i.e. the contents of {var}`defaultConfig`.
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'';
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};
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extraParams = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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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`.
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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 = lib.mkIf cfg.enable {
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assertions =
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[ { assertion = !config.services.rsyslogd.enable;
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message = "rsyslogd conflicts with syslogd";
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}
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];
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environment.systemPackages = [ pkgs.sysklogd ];
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services.syslogd.extraParams = lib.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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