125 lines
		
	
	
		
			2.9 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
			
		
		
	
	
			125 lines
		
	
	
		
			2.9 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.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</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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