stockholm/krebs/3modules/rtorrent.nix

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{ config, lib, pkgs, options, ... }:
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with import <stockholm/lib>;
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let
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cfg = config.krebs.rtorrent;
webcfg = config.krebs.rtorrent.web;
rucfg = config.krebs.rtorrent.rutorrent;
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nginx-user = config.services.nginx.user;
nginx-group = config.services.nginx.group;
fpm-socket = "/var/run/php5-fpm-rutorrent.sock";
webdir = rucfg.webdir;
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systemd-logfile = cfg.workDir + "/rtorrent-systemd.log";
# rutorrent requires a couple of binaries to be available to either the
# rtorrent process or to phpfpm
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rutorrent-deps = with pkgs; [ curl php coreutils procps ffmpeg mediainfo ] ++
(if (config.nixpkgs.config.allowUnfree or false) then
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trace "enabling unfree packages for rutorrent" [ unrar unzip ] else
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trace "not enabling unfree packages for rutorrent because allowUnfree is unset" []);
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configFile = pkgs.writeText "rtorrent-config" ''
# THIS FILE IS AUTOGENERATED
${optionalString (cfg.listenPort != null) ''
port_range = ${toString cfg.listenPort}-${toString cfg.listenPort}
port_random = no
''}
${optionalString (cfg.watchDir != null) ''
directory.watch.added = "${cfg.watchDir}", load.start_verbose
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''}
directory = ${cfg.downloadDir}
session = ${cfg.sessionDir}
${optionalString (cfg.enableXMLRPC ) ''
# prepare socket and set permissions. rtorrent user is part of group nginx
# TODO: configure a shared torrent group
execute.nothrow = rm,${cfg.xmlrpc-socket}
scgi_local = ${cfg.xmlrpc-socket}
schedule = scgi_permission,0,0,"execute.nothrow=chmod,\"ug+w,o=\",${cfg.xmlrpc-socket}"
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''}
system.file.allocate.set = ${if cfg.preAllocate then "yes" else "no"}
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# Prepare systemd logging
log.open_file = "rtorrent-systemd", ${systemd-logfile}
log.add_output = "warn", "rtorrent-systemd"
log.add_output = "notice", "rtorrent-systemd"
log.add_output = "info", "rtorrent-systemd"
# log.add_output = "debug", "rtorrent-systemd"
${cfg.extraConfig}
'';
out = {
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options.krebs.rtorrent = api;
# This only works because none of the attrsets returns the same key
config = with lib; mkIf cfg.enable (lib.mkMerge [
(lib.mkIf webcfg.enable rpcweb-imp)
# only build rutorrent-imp if webcfg is enabled as well
(lib.mkIf (webcfg.enable && rucfg.enable) rutorrent-imp)
imp
]);
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};
api = {
enable = mkEnableOption "rtorrent";
web = {
# configure NGINX to provide /RPC2 for listen address
# authentication also applies to rtorrent.rutorrent
enable = mkEnableOption "rtorrent nginx web RPC";
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addr = mkOption {
type = types.addr4;
default = "0.0.0.0";
description = ''
the address to listen on
default is 0.0.0.0
'';
};
port = mkOption {
type = types.nullOr types.int;
description =''
nginx listen port for rtorrent
'';
default = 8006;
};
basicAuth = mkOption {
type = types.attrsOf types.str ;
description = ''
basic authentication to be used. If unset, no authentication will be
enabled.
Refer to `services.nginx.virtualHosts.<name>.basicAuth`
'';
default = {};
};
};
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rutorrent = {
enable = mkEnableOption "rutorrent"; # requires rtorrent.web.enable
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package = mkOption {
type = types.package;
description = ''
path to rutorrent package. When using your own ruTorrent package,
scgi_port and scgi_host will be patched on startup.
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'';
default = pkgs.rutorrent;
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};
webdir = mkOption {
type = types.path;
description = ''
rutorrent php files will be written to this folder.
when using nginx, be aware that the the folder should be readable by nginx.
because rutorrent does not hold mutable data in a separate folder
these files must be writable.
'';
default = "/var/lib/rutorrent";
};
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};
package = mkOption {
type = types.package;
default = pkgs.rtorrent;
};
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# TODO: enable xmlrpc with web.enable
enableXMLRPC = mkEnableOption "rtorrent xmlrpc via socket";
xmlrpc-socket = mkOption {
type = types.str;
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description = ''
enable xmlrpc at given socket. Required for web-interface.
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for documentation see:
https://github.com/rakshasa/rtorrent/wiki/RPC-Setup-XMLRPC
'';
default = cfg.workDir + "/rtorrent.sock";
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};
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preAllocate = mkOption {
type = types.bool;
description = ''
Pre-Allocate torrent files
'';
default = true;
};
downloadDir = mkOption {
type = types.path;
description = ''
directory where torrents are stored
'';
default = cfg.workDir + "/downloads";
};
sessionDir = mkOption {
type = types.path;
description = ''
directory where torrent progress is stored
'';
default = cfg.workDir + "/rtorrent-session";
};
watchDir = mkOption {
type = with types; nullOr str;
description = ''
directory to watch for torrent files.
If unset, no watch directory will be configured
'';
default = null;
};
listenPort = mkOption {
type = with types; nullOr int;
description =''
listening port. if you want multiple ports, use extraConfig port_range
'';
};
extraConfig = mkOption {
type = types.string;
description = ''
config to be placed into ${cfg.workDir}/.rtorrent.rc
see ${cfg.package}/share/doc/rtorrent/rtorrent.rc
'';
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example = literalExample ''
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log.execute = ${cfg.workDir}/execute.log
log.xmlrpc = ${cfg.workDir}/xmlrpc.log
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'';
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default = "";
};
user = mkOption {
description = ''
user which will run rtorrent. if kept default a new user will be created
'';
type = types.str;
default = "rtorrent";
};
workDir = mkOption {
description = ''
working directory. rtorrent will search in HOME for `.rtorrent.rc`
'';
type = types.str;
default = "/var/lib/rtorrent";
};
};
imp = {
systemd.services = {
rtorrent-daemon = {
description = "rtorrent headless";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
restartIfChanged = true;
serviceConfig = {
Type = "forking";
ExecStartPre = pkgs.writeDash "prepare-folder" ''
mkdir -p ${cfg.workDir} ${cfg.sessionDir}
chmod 770 ${cfg.workDir} ${cfg.sessionDir}
touch ${systemd-logfile}
cp -f ${configFile} ${cfg.workDir}/.rtorrent.rc
'';
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ExecStart = "${pkgs.tmux}/bin/tmux new-session -s rt -n rtorrent -d 'PATH=/bin:/usr/bin:${makeBinPath rutorrent-deps} ${cfg.package}/bin/rtorrent'";
Restart = "always";
RestartSec = "10";
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## you can simply sudo -u rtorrent tmux a if privateTmp is set to false
## otherwise the tmux session is stored in some private folder in /tmp
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PrivateTmp = false;
WorkingDirectory = cfg.workDir;
User = "${cfg.user}";
};
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};
rtorrent-log = {
after = [ "rtorrent-daemon.service" ];
bindsTo = [ "rtorrent-daemon.service" ];
wantedBy = [ "rtorrent-daemon.service" ];
serviceConfig = {
ExecStart = "${pkgs.coreutils}/bin/tail -f ${systemd-logfile}";
User = "${cfg.user}";
};
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};
} // (optionalAttrs webcfg.enable {
rutorrent-prepare = {
after = [ "rtorrent-daemon.service" ];
wantedBy = [ "rtorrent-daemon.service" ];
serviceConfig = {
Type = "oneshot";
# we create the folder and set the permissions to allow nginx
# TODO: update files if the version of rutorrent changed
ExecStart = pkgs.writeDash "create-webconfig-dir" ''
if [ ! -e ${webdir} ];then
echo "creating webconfiguration directory for rutorrent: ${webdir}"
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cp -vr ${rucfg.package} ${webdir}
echo "setting permissions for webdir to ${cfg.user}:${nginx-group}"
chown -R ${cfg.user}:${nginx-group} ${webdir}
chmod -R 770 ${webdir}
else
echo "not overwriting ${webdir}"
fi
echo "updating xmlrpc-socket with unix://${cfg.xmlrpc-socket}"
sed -i -e 's#^\s*$scgi_port.*#$scgi_port = 0;#' \
-e 's#^\s*$scgi_host.*#$scgi_host = "unix://${cfg.xmlrpc-socket}";#' \
"${webdir}/conf/config.php"
'';
};
};
})
// (optionalAttrs rucfg.enable { });
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users = lib.mkIf (cfg.user == "rtorrent") {
users.rtorrent = {
uid = genid "rtorrent";
home = cfg.workDir;
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group = nginx-group; # required for rutorrent to work
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shell = "/bin/sh"; #required for tmux
isSystemUser = true;
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createHome = true;
};
groups.rtorrent.gid = genid "rtorrent";
};
};
rpcweb-imp = {
services.nginx.enable = mkDefault true;
services.nginx.virtualHosts.rtorrent = {
default = mkDefault true;
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inherit (webcfg) basicAuth;
root = optionalString rucfg.enable webdir;
locations = {
"/RPC2".extraConfig = ''
include ${pkgs.nginx}/conf/scgi_params;
scgi_param SCRIPT_NAME /RPC2;
scgi_pass unix:${cfg.xmlrpc-socket};
'';
} // (optionalAttrs rucfg.enable {
"~ \.php$".extraConfig = ''
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client_max_body_size 200M;
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass unix:${fpm-socket};
try_files $uri =404;
fastcgi_index index.php;
include ${pkgs.nginx}/conf/fastcgi_params;
include ${pkgs.nginx}/conf/fastcgi.conf;
''; }
);
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# workaround because upstream nginx api changed
# TODO remove when nobody uses 17.03 anymore
} // (if hasAttr "port" (head options.services.nginx.virtualHosts.type.getSubModules).submodule.options then {
port = webcfg.port;
} else {
listen = [
{ inherit (webcfg) addr port; }
];
});
};
rutorrent-imp = {
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services.phpfpm = {
# phpfpm does not have an enable option
poolConfigs = {
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rutorrent = ''
user = ${nginx-user}
group = ${nginx-group}
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listen = ${fpm-socket}
listen.owner = ${nginx-user}
listen.group = ${nginx-group}
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pm = dynamic
pm.max_children = 5
pm.start_servers = 2
pm.min_spare_servers = 1
pm.max_spare_servers = 3
chdir = /
php_admin_value[error_log] = 'stderr'
php_admin_flag[log_errors] = on
catch_workers_output = yes
env[PATH] = ${makeBinPath rutorrent-deps}
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'';
};
};
};
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in out