146 lines
4.6 KiB
Nix
146 lines
4.6 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.stalwart-mail;
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configFormat = pkgs.formats.toml { };
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configFile = configFormat.generate "stalwart-mail.toml" cfg.settings;
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dataDir = "/var/lib/stalwart-mail";
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useLegacyStorage = versionOlder config.system.stateVersion "24.11";
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in {
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options.services.stalwart-mail = {
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enable = mkEnableOption "the Stalwart all-in-one email server";
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package = mkPackageOption pkgs "stalwart-mail" { };
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settings = mkOption {
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inherit (configFormat) type;
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default = { };
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description = ''
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Configuration options for the Stalwart email server.
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See <https://stalw.art/docs/category/configuration> for available options.
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By default, the module is configured to store everything locally.
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'';
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};
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};
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config = mkIf cfg.enable {
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# Default config: all local
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services.stalwart-mail.settings = {
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tracer.stdout = {
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type = mkDefault "stdout";
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level = mkDefault "info";
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ansi = mkDefault false; # no colour markers to journald
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enable = mkDefault true;
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};
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store = if useLegacyStorage then {
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# structured data in SQLite, blobs on filesystem
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db.type = mkDefault "sqlite";
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db.path = mkDefault "${dataDir}/data/index.sqlite3";
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fs.type = mkDefault "fs";
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fs.path = mkDefault "${dataDir}/data/blobs";
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} else {
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# everything in RocksDB
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db.type = mkDefault "rocksdb";
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db.path = mkDefault "${dataDir}/db";
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db.compression = mkDefault "lz4";
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};
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storage.data = mkDefault "db";
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storage.fts = mkDefault "db";
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storage.lookup = mkDefault "db";
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storage.blob = mkDefault (if useLegacyStorage then "fs" else "db");
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directory.internal.type = mkDefault "internal";
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directory.internal.store = mkDefault "db";
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storage.directory = mkDefault "internal";
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resolver.type = mkDefault "system";
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resolver.public-suffix = lib.mkDefault [
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"file://${pkgs.publicsuffix-list}/share/publicsuffix/public_suffix_list.dat"
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];
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config.resource = {
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spam-filter = lib.mkDefault "file://${cfg.package}/etc/stalwart/spamfilter.toml";
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};
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};
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# This service stores a potentially large amount of data.
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# Running it as a dynamic user would force chown to be run everytime the
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# service is restarted on a potentially large number of files.
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# That would cause unnecessary and unwanted delays.
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users = {
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groups.stalwart-mail = { };
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users.stalwart-mail = {
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isSystemUser = true;
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group = "stalwart-mail";
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};
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};
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systemd = {
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packages = [ cfg.package ];
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services.stalwart-mail = {
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wantedBy = [ "multi-user.target" ];
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after = [ "local-fs.target" "network.target" ];
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preStart = if useLegacyStorage then ''
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mkdir -p ${dataDir}/data/blobs
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'' else ''
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mkdir -p ${dataDir}/db
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'';
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serviceConfig = {
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ExecStart = [
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""
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"${cfg.package}/bin/stalwart-mail --config=${configFile}"
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];
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StandardOutput = "journal";
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StandardError = "journal";
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StateDirectory = "stalwart-mail";
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# Bind standard privileged ports
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AmbientCapabilities = [ "CAP_NET_BIND_SERVICE" ];
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CapabilityBoundingSet = [ "CAP_NET_BIND_SERVICE" ];
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# Hardening
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DeviceAllow = [ "" ];
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LockPersonality = true;
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MemoryDenyWriteExecute = true;
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PrivateDevices = true;
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PrivateUsers = false; # incompatible with CAP_NET_BIND_SERVICE
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ProcSubset = "pid";
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PrivateTmp = true;
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ProtectClock = true;
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ProtectControlGroups = true;
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ProtectHome = true;
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ProtectHostname = true;
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ProtectKernelLogs = true;
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ProtectKernelModules = true;
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ProtectKernelTunables = true;
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ProtectProc = "invisible";
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ProtectSystem = "strict";
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RestrictAddressFamilies = [ "AF_INET" "AF_INET6" ];
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RestrictNamespaces = true;
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RestrictRealtime = true;
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RestrictSUIDSGID = true;
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SystemCallArchitectures = "native";
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SystemCallFilter = [ "@system-service" "~@privileged" ];
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UMask = "0077";
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};
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unitConfig.ConditionPathExists = [
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""
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"${configFile}"
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];
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};
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};
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# Make admin commands available in the shell
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environment.systemPackages = [ cfg.package ];
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};
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meta = {
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maintainers = with maintainers; [ happysalada pacien onny ];
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};
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}
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