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nixpkgs/nixos/modules/services/mail/rspamd.nix
pennae 2e751c0772 treewide: automatically md-convert option descriptions
the conversion procedure is simple:

 - find all things that look like options, ie calls to either `mkOption`
   or `lib.mkOption` that take an attrset. remember the attrset as the
   option
 - for all options, find a `description` attribute who's value is not a
   call to `mdDoc` or `lib.mdDoc`
 - textually convert the entire value of the attribute to MD with a few
   simple regexes (the set from mdize-module.sh)
 - if the change produced a change in the manual output, discard
 - if the change kept the manual unchanged, add some text to the
   description to make sure we've actually found an option. if the
   manual changes this time, keep the converted description

this procedure converts 80% of nixos options to markdown. around 2000
options remain to be inspected, but most of those fail the "does not
change the manual output check": currently the MD conversion process
does not faithfully convert docbook tags like <code> and <package>, so
any option using such tags will not be converted at all.
2022-07-30 15:16:34 +02:00

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{ config, options, pkgs, lib, ... }:
with lib;
let
cfg = config.services.rspamd;
opt = options.services.rspamd;
postfixCfg = config.services.postfix;
bindSocketOpts = {options, config, ... }: {
options = {
socket = mkOption {
type = types.str;
example = "localhost:11333";
description = ''
Socket for this worker to listen on in a format acceptable by rspamd.
'';
};
mode = mkOption {
type = types.str;
default = "0644";
description = "Mode to set on unix socket";
};
owner = mkOption {
type = types.str;
default = "${cfg.user}";
description = "Owner to set on unix socket";
};
group = mkOption {
type = types.str;
default = "${cfg.group}";
description = "Group to set on unix socket";
};
rawEntry = mkOption {
type = types.str;
internal = true;
};
};
config.rawEntry = let
maybeOption = option:
optionalString options.${option}.isDefined " ${option}=${config.${option}}";
in
if (!(hasPrefix "/" config.socket)) then "${config.socket}"
else "${config.socket}${maybeOption "mode"}${maybeOption "owner"}${maybeOption "group"}";
};
traceWarning = w: x: builtins.trace "warning: ${w}" x;
workerOpts = { name, options, ... }: {
options = {
enable = mkOption {
type = types.nullOr types.bool;
default = null;
description = lib.mdDoc "Whether to run the rspamd worker.";
};
name = mkOption {
type = types.nullOr types.str;
default = name;
description = lib.mdDoc "Name of the worker";
};
type = mkOption {
type = types.nullOr (types.enum [
"normal" "controller" "fuzzy" "rspamd_proxy" "lua" "proxy"
]);
description = lib.mdDoc ''
The type of this worker. The type `proxy` is
deprecated and only kept for backwards compatibility and should be
replaced with `rspamd_proxy`.
'';
apply = let
from = "services.rspamd.workers.\"${name}\".type";
files = options.type.files;
warning = "The option `${from}` defined in ${showFiles files} has enum value `proxy` which has been renamed to `rspamd_proxy`";
in x: if x == "proxy" then traceWarning warning "rspamd_proxy" else x;
};
bindSockets = mkOption {
type = types.listOf (types.either types.str (types.submodule bindSocketOpts));
default = [];
description = lib.mdDoc ''
List of sockets to listen, in format acceptable by rspamd
'';
example = [{
socket = "/run/rspamd.sock";
mode = "0666";
owner = "rspamd";
} "*:11333"];
apply = value: map (each: if (isString each)
then if (isUnixSocket each)
then {socket = each; owner = cfg.user; group = cfg.group; mode = "0644"; rawEntry = "${each}";}
else {socket = each; rawEntry = "${each}";}
else each) value;
};
count = mkOption {
type = types.nullOr types.int;
default = null;
description = lib.mdDoc ''
Number of worker instances to run
'';
};
includes = mkOption {
type = types.listOf types.str;
default = [];
description = lib.mdDoc ''
List of files to include in configuration
'';
};
extraConfig = mkOption {
type = types.lines;
default = "";
description = lib.mdDoc "Additional entries to put verbatim into worker section of rspamd config file.";
};
};
config = mkIf (name == "normal" || name == "controller" || name == "fuzzy" || name == "rspamd_proxy") {
type = mkDefault name;
includes = mkDefault [ "$CONFDIR/worker-${if name == "rspamd_proxy" then "proxy" else name}.inc" ];
bindSockets =
let
unixSocket = name: {
mode = "0660";
socket = "/run/rspamd/${name}.sock";
owner = cfg.user;
group = cfg.group;
};
in mkDefault (if name == "normal" then [(unixSocket "rspamd")]
else if name == "controller" then [ "localhost:11334" ]
else if name == "rspamd_proxy" then [ (unixSocket "proxy") ]
else [] );
};
};
isUnixSocket = socket: hasPrefix "/" (if (isString socket) then socket else socket.socket);
mkBindSockets = enabled: socks: concatStringsSep "\n "
(flatten (map (each: "bind_socket = \"${each.rawEntry}\";") socks));
rspamdConfFile = pkgs.writeText "rspamd.conf"
''
.include "$CONFDIR/common.conf"
options {
pidfile = "$RUNDIR/rspamd.pid";
.include "$CONFDIR/options.inc"
.include(try=true; priority=1,duplicate=merge) "$LOCAL_CONFDIR/local.d/options.inc"
.include(try=true; priority=10) "$LOCAL_CONFDIR/override.d/options.inc"
}
logging {
type = "syslog";
.include "$CONFDIR/logging.inc"
.include(try=true; priority=1,duplicate=merge) "$LOCAL_CONFDIR/local.d/logging.inc"
.include(try=true; priority=10) "$LOCAL_CONFDIR/override.d/logging.inc"
}
${concatStringsSep "\n" (mapAttrsToList (name: value: let
includeName = if name == "rspamd_proxy" then "proxy" else name;
tryOverride = boolToString (value.extraConfig == "");
in ''
worker "${value.type}" {
type = "${value.type}";
${optionalString (value.enable != null)
"enabled = ${if value.enable != false then "yes" else "no"};"}
${mkBindSockets value.enable value.bindSockets}
${optionalString (value.count != null) "count = ${toString value.count};"}
${concatStringsSep "\n " (map (each: ".include \"${each}\"") value.includes)}
.include(try=true; priority=1,duplicate=merge) "$LOCAL_CONFDIR/local.d/worker-${includeName}.inc"
.include(try=${tryOverride}; priority=10) "$LOCAL_CONFDIR/override.d/worker-${includeName}.inc"
}
'') cfg.workers)}
${optionalString (cfg.extraConfig != "") ''
.include(priority=10) "$LOCAL_CONFDIR/override.d/extra-config.inc"
''}
'';
filterFiles = files: filterAttrs (n: v: v.enable) files;
rspamdDir = pkgs.linkFarm "etc-rspamd-dir" (
(mapAttrsToList (name: file: { name = "local.d/${name}"; path = file.source; }) (filterFiles cfg.locals)) ++
(mapAttrsToList (name: file: { name = "override.d/${name}"; path = file.source; }) (filterFiles cfg.overrides)) ++
(optional (cfg.localLuaRules != null) { name = "rspamd.local.lua"; path = cfg.localLuaRules; }) ++
[ { name = "rspamd.conf"; path = rspamdConfFile; } ]
);
configFileModule = prefix: { name, config, ... }: {
options = {
enable = mkOption {
type = types.bool;
default = true;
description = lib.mdDoc ''
Whether this file ${prefix} should be generated. This
option allows specific ${prefix} files to be disabled.
'';
};
text = mkOption {
default = null;
type = types.nullOr types.lines;
description = lib.mdDoc "Text of the file.";
};
source = mkOption {
type = types.path;
description = lib.mdDoc "Path of the source file.";
};
};
config = {
source = mkIf (config.text != null) (
let name' = "rspamd-${prefix}-" + baseNameOf name;
in mkDefault (pkgs.writeText name' config.text));
};
};
configOverrides =
(mapAttrs' (n: v: nameValuePair "worker-${if n == "rspamd_proxy" then "proxy" else n}.inc" {
text = v.extraConfig;
})
(filterAttrs (n: v: v.extraConfig != "") cfg.workers))
// (if cfg.extraConfig == "" then {} else {
"extra-config.inc".text = cfg.extraConfig;
});
in
{
###### interface
options = {
services.rspamd = {
enable = mkEnableOption "rspamd, the Rapid spam filtering system";
debug = mkOption {
type = types.bool;
default = false;
description = lib.mdDoc "Whether to run the rspamd daemon in debug mode.";
};
locals = mkOption {
type = with types; attrsOf (submodule (configFileModule "locals"));
default = {};
description = lib.mdDoc ''
Local configuration files, written into {file}`/etc/rspamd/local.d/{name}`.
'';
example = literalExpression ''
{ "redis.conf".source = "/nix/store/.../etc/dir/redis.conf";
"arc.conf".text = "allow_envfrom_empty = true;";
}
'';
};
overrides = mkOption {
type = with types; attrsOf (submodule (configFileModule "overrides"));
default = {};
description = lib.mdDoc ''
Overridden configuration files, written into {file}`/etc/rspamd/override.d/{name}`.
'';
example = literalExpression ''
{ "redis.conf".source = "/nix/store/.../etc/dir/redis.conf";
"arc.conf".text = "allow_envfrom_empty = true;";
}
'';
};
localLuaRules = mkOption {
default = null;
type = types.nullOr types.path;
description = lib.mdDoc ''
Path of file to link to {file}`/etc/rspamd/rspamd.local.lua` for local
rules written in Lua
'';
};
workers = mkOption {
type = with types; attrsOf (submodule workerOpts);
description = lib.mdDoc ''
Attribute set of workers to start.
'';
default = {
normal = {};
controller = {};
};
example = literalExpression ''
{
normal = {
includes = [ "$CONFDIR/worker-normal.inc" ];
bindSockets = [{
socket = "/run/rspamd/rspamd.sock";
mode = "0660";
owner = "''${config.${opt.user}}";
group = "''${config.${opt.group}}";
}];
};
controller = {
includes = [ "$CONFDIR/worker-controller.inc" ];
bindSockets = [ "[::1]:11334" ];
};
}
'';
};
extraConfig = mkOption {
type = types.lines;
default = "";
description = lib.mdDoc ''
Extra configuration to add at the end of the rspamd configuration
file.
'';
};
user = mkOption {
type = types.str;
default = "rspamd";
description = lib.mdDoc ''
User to use when no root privileges are required.
'';
};
group = mkOption {
type = types.str;
default = "rspamd";
description = lib.mdDoc ''
Group to use when no root privileges are required.
'';
};
postfix = {
enable = mkOption {
type = types.bool;
default = false;
description = lib.mdDoc "Add rspamd milter to postfix main.conf";
};
config = mkOption {
type = with types; attrsOf (oneOf [ bool str (listOf str) ]);
description = lib.mdDoc ''
Addon to postfix configuration
'';
default = {
smtpd_milters = ["unix:/run/rspamd/rspamd-milter.sock"];
non_smtpd_milters = ["unix:/run/rspamd/rspamd-milter.sock"];
};
};
};
};
};
###### implementation
config = mkIf cfg.enable {
services.rspamd.overrides = configOverrides;
services.rspamd.workers = mkIf cfg.postfix.enable {
controller = {};
rspamd_proxy = {
bindSockets = [ {
mode = "0660";
socket = "/run/rspamd/rspamd-milter.sock";
owner = cfg.user;
group = postfixCfg.group;
} ];
extraConfig = ''
upstream "local" {
default = yes; # Self-scan upstreams are always default
self_scan = yes; # Enable self-scan
}
'';
};
};
services.postfix.config = mkIf cfg.postfix.enable cfg.postfix.config;
systemd.services.postfix = mkIf cfg.postfix.enable {
serviceConfig.SupplementaryGroups = [ postfixCfg.group ];
};
# Allow users to run 'rspamc' and 'rspamadm'.
environment.systemPackages = [ pkgs.rspamd ];
users.users.${cfg.user} = {
description = "rspamd daemon";
uid = config.ids.uids.rspamd;
group = cfg.group;
};
users.groups.${cfg.group} = {
gid = config.ids.gids.rspamd;
};
environment.etc.rspamd.source = rspamdDir;
systemd.services.rspamd = {
description = "Rspamd Service";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
restartTriggers = [ rspamdDir ];
serviceConfig = {
ExecStart = "${pkgs.rspamd}/bin/rspamd ${optionalString cfg.debug "-d"} -c /etc/rspamd/rspamd.conf -f";
Restart = "always";
User = "${cfg.user}";
Group = "${cfg.group}";
SupplementaryGroups = mkIf cfg.postfix.enable [ postfixCfg.group ];
RuntimeDirectory = "rspamd";
RuntimeDirectoryMode = "0755";
StateDirectory = "rspamd";
StateDirectoryMode = "0700";
AmbientCapabilities = [];
CapabilityBoundingSet = "";
DevicePolicy = "closed";
LockPersonality = true;
NoNewPrivileges = true;
PrivateDevices = true;
PrivateMounts = true;
PrivateTmp = true;
# we need to chown socket to rspamd-milter
PrivateUsers = !cfg.postfix.enable;
ProtectClock = true;
ProtectControlGroups = true;
ProtectHome = true;
ProtectHostname = true;
ProtectKernelLogs = true;
ProtectKernelModules = true;
ProtectKernelTunables = true;
ProtectSystem = "strict";
RemoveIPC = true;
RestrictAddressFamilies = [ "AF_INET" "AF_INET6" "AF_UNIX" ];
RestrictNamespaces = true;
RestrictRealtime = true;
RestrictSUIDSGID = true;
SystemCallArchitectures = "native";
SystemCallFilter = "@system-service";
UMask = "0077";
};
};
};
imports = [
(mkRemovedOptionModule [ "services" "rspamd" "socketActivation" ]
"Socket activation never worked correctly and could at this time not be fixed and so was removed")
(mkRenamedOptionModule [ "services" "rspamd" "bindSocket" ] [ "services" "rspamd" "workers" "normal" "bindSockets" ])
(mkRenamedOptionModule [ "services" "rspamd" "bindUISocket" ] [ "services" "rspamd" "workers" "controller" "bindSockets" ])
(mkRemovedOptionModule [ "services" "rmilter" ] "Use services.rspamd.* instead to set up milter service")
];
}