stockholm/krebs/3modules/rtorrent.nix
2016-08-24 23:07:05 +02:00

349 lines
11 KiB
Nix

{ config, lib, pkgs, ... }:
with config.krebs.lib;
let
cfg = config.krebs.rtorrent;
webcfg = config.krebs.rtorrent.web;
rucfg = config.krebs.rtorrent.rutorrent;
nginx-user = config.services.nginx.user;
nginx-group = config.services.nginx.group;
fpm-socket = "/var/run/php5-fpm-rutorrent.sock";
webdir = rucfg.webdir;
systemd-logfile = cfg.workDir + "/rtorrent-systemd.log";
# rutorrent requires a couple of binaries to be available to either the
# rtorrent process or to phpfpm
rutorrent-deps = with pkgs; [ curl php coreutils procps ffmpeg mediainfo ] ++
(if (config.nixpkgs.config.allowUnfree or false) then
trace "enabling unfree packages for rutorrent" [ unrar unzip ] else
trace "not enabling unfree packages for rutorrent because allowUnfree is unset" []);
configFile = pkgs.writeText "rtorrent-config" ''
# THIS FILE IS AUTOGENERATED
${optionalString (cfg.listenPort != null) ''
port_range = ${toString cfg.listenPort}-${toString cfg.listenPort}
port_random = no
''}
${optionalString (cfg.watchDir != null) ''
schedule = watch_directory,5,5,load_start=${cfg.watchDir}/*.torrent
''}
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}"
''}
system.file_allocate.set = ${if cfg.preAllocate then "yes" else "no"}
# 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"
${cfg.extraConfig}
'';
out = {
options.krebs.rtorrent = api;
# This only works because none of the attrsets returns the same key
config = with lib; mkIf cfg.enable (lib.mkMerge [
(lib.mkIf webcfg.enable rpcweb-imp)
# only build rutorrent-imp if webcfg is enabled as well
(lib.mkIf (webcfg.enable && rucfg.enable) rutorrent-imp)
imp
]);
};
api = {
enable = mkEnableOption "rtorrent";
web = {
# configure NGINX to provide /RPC2 for listen address
# authentication also applies to rtorrent.rutorrent
enable = mkEnableOption "rtorrent nginx web RPC";
listenAddress = mkOption {
type = types.str;
description =''
nginx listen address for rtorrent web
'';
default = "localhost:8006";
};
enableAuth = mkEnableOption "rutorrent authentication";
authfile = mkOption {
type = types.path;
description = ''
basic authentication file to be used.
Use `${pkgs.apacheHttpd}/bin/htpasswd -c <file> <username>` to create the file.
Only in use if authentication is enabled.
'';
};
};
rutorrent = {
enable = mkEnableOption "rutorrent"; # requires rtorrent.web.enable
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.
'';
default = pkgs.rutorrent;
};
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";
};
};
package = mkOption {
type = types.package;
default = pkgs.rtorrent;
};
# TODO: enable xmlrpc with web.enable
enableXMLRPC = mkEnableOption "rtorrent xmlrpc via socket";
xmlrpc-socket = mkOption {
type = types.str;
description = ''
enable xmlrpc at given socket. Required for web-interface.
for documentation see:
https://github.com/rakshasa/rtorrent/wiki/RPC-Setup-XMLRPC
'';
default = cfg.workDir + "/rtorrent.sock";
};
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
'';
example = literalExample ''
log.execute = ${cfg.workDir}/execute.log
log.xmlrpc = ${cfg.workDir}/xmlrpc.log
'';
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} ${cfg.workDir}/.rtorrent.rc
'';
ExecStart = "${pkgs.tmux}/bin/tmux new-session -s rt -n rtorrent -d 'PATH=/bin:/usr/bin:${makeBinPath rutorrent-deps} ${cfg.package}/bin/rtorrent'";
## you can simply sudo -u rtorrent tmux a if privateTmp is set to false
## otherwise the tmux session is stored in some private folder in /tmp
PrivateTmp = false;
WorkingDirectory = cfg.workDir;
Restart = "on-failure";
User = "${cfg.user}";
};
};
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}";
};
};
} // (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}"
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 { });
users = lib.mkIf (cfg.user == "rtorrent") {
users.rtorrent = {
uid = genid "rtorrent";
home = cfg.workDir;
group = nginx-group; # required for rutorrent to work
shell = "/bin/sh"; #required for tmux
isSystemUser = true;
createHome = true;
};
groups.rtorrent.gid = genid "rtorrent";
};
};
rpcweb-imp = {
krebs.nginx.enable = mkDefault true;
krebs.nginx.servers.rtorrent = {
listen = [ webcfg.listenAddress ];
server-names = [ "default" ];
extraConfig = ''
${optionalString webcfg.enableAuth ''
auth_basic "rtorrent";
auth_basic_user_file ${webcfg.authfile};
''}
${optionalString rucfg.enable ''
root ${webdir};
''}
'';
locations = [
(nameValuePair "/RPC2" ''
include ${pkgs.nginx}/conf/scgi_params;
scgi_param SCRIPT_NAME /RPC2;
scgi_pass unix:${cfg.xmlrpc-socket};
'')
] ++ (optional rucfg.enable
(nameValuePair "~ \.php$" ''
client_max_body_size 200M;
root ${webdir};
fastcgi_split_path_info ^(.+\.php)(/.+)$;
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;
'')
);
};
};
rutorrent-imp = {
services.phpfpm = {
# phpfpm does not have an enable option
poolConfigs = {
rutorrent = ''
user = ${nginx-user}
group = ${nginx-group}
listen = ${fpm-socket}
listen.owner = ${nginx-user}
listen.group = ${nginx-group}
pm = dynamic
pm.max_children = 5
pm.start_servers = 2
pm.min_spare_servers = 1
pm.max_spare_servers = 3
chdir = /
# errors to journal
php_admin_value[error_log] = 'stderr'
php_admin_flag[log_errors] = on
catch_workers_output = yes
env[PATH] = ${makeBinPath rutorrent-deps}
'';
};
};
};
in out