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nixpkgs/nixos/modules/services/logging/syslog-ng.nix

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{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.services.syslog-ng;
syslogngConfig = pkgs.writeText "syslog-ng.conf" ''
${cfg.configHeader}
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${cfg.extraConfig}
'';
ctrlSocket = "/run/syslog-ng/syslog-ng.ctl";
pidFile = "/run/syslog-ng/syslog-ng.pid";
persistFile = "/var/syslog-ng/syslog-ng.persist";
syslogngOptions = [
"--foreground"
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"--module-path=${concatStringsSep ":" (["${cfg.package}/lib/syslog-ng"] ++ cfg.extraModulePaths)}"
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"--cfgfile=${syslogngConfig}"
"--control=${ctrlSocket}"
"--persist-file=${persistFile}"
"--pidfile=${pidFile}"
];
in {
imports = [
(mkRemovedOptionModule [ "services" "syslog-ng" "serviceName" ] "")
(mkRemovedOptionModule [ "services" "syslog-ng" "listenToJournal" ] "")
];
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options = {
services.syslog-ng = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable the syslog-ng daemon.
'';
};
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package = mkOption {
type = types.package;
default = pkgs.syslogng;
defaultText = "pkgs.syslogng";
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description = ''
The package providing syslog-ng binaries.
'';
};
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extraModulePaths = mkOption {
type = types.listOf types.str;
default = [];
example = literalExample ''
[ "''${pkgs.syslogng_incubator}/lib/syslog-ng" ]
'';
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description = ''
A list of paths that should be included in syslog-ng's
<literal>--module-path</literal> option. They should usually
end in <literal>/lib/syslog-ng</literal>
'';
};
extraConfig = mkOption {
type = types.lines;
default = "";
description = ''
Configuration added to the end of <literal>syslog-ng.conf</literal>.
'';
};
configHeader = mkOption {
type = types.lines;
default = ''
@version: 3.6
@include "scl.conf"
'';
description = ''
The very first lines of the configuration file. Should usually contain
the syslog-ng version header.
'';
};
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};
};
config = mkIf cfg.enable {
systemd.services.syslog-ng = {
description = "syslog-ng daemon";
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preStart = "mkdir -p /{var,run}/syslog-ng";
wantedBy = [ "multi-user.target" ];
after = [ "multi-user.target" ]; # makes sure hostname etc is set
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serviceConfig = {
Type = "notify";
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PIDFile = pidFile;
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StandardOutput = "null";
Restart = "on-failure";
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ExecStart = "${cfg.package}/sbin/syslog-ng ${concatStringsSep " " syslogngOptions}";
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ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
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};
};
};
}