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478e7184f8
And replace them with a more appropriate type Also fix up some minor module problems along the way
232 lines
5.9 KiB
Nix
232 lines
5.9 KiB
Nix
{ config, lib, pkgs, ...}:
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with lib;
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let
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cfg = config.services.mosquitto;
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listenerConf = optionalString cfg.ssl.enable ''
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listener ${toString cfg.ssl.port} ${cfg.ssl.host}
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cafile ${cfg.ssl.cafile}
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certfile ${cfg.ssl.certfile}
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keyfile ${cfg.ssl.keyfile}
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'';
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passwordConf = optionalString cfg.checkPasswords ''
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password_file ${cfg.dataDir}/passwd
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'';
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mosquittoConf = pkgs.writeText "mosquitto.conf" ''
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acl_file ${aclFile}
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persistence true
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allow_anonymous ${boolToString cfg.allowAnonymous}
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bind_address ${cfg.host}
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port ${toString cfg.port}
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${passwordConf}
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${listenerConf}
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${cfg.extraConf}
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'';
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userAcl = (concatStringsSep "\n\n" (mapAttrsToList (n: c:
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"user ${n}\n" + (concatStringsSep "\n" c.acl)) cfg.users
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));
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aclFile = pkgs.writeText "mosquitto.acl" ''
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${cfg.aclExtraConf}
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${userAcl}
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'';
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in
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{
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###### Interface
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options = {
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services.mosquitto = {
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enable = mkEnableOption "the MQTT Mosquitto broker";
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host = mkOption {
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default = "127.0.0.1";
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example = "0.0.0.0";
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type = types.str;
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description = ''
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Host to listen on without SSL.
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'';
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};
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port = mkOption {
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default = 1883;
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example = 1883;
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type = types.int;
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description = ''
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Port on which to listen without SSL.
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'';
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};
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ssl = {
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enable = mkEnableOption "SSL listener";
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cafile = mkOption {
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type = types.nullOr types.path;
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default = null;
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description = "Path to PEM encoded CA certificates.";
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};
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certfile = mkOption {
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type = types.nullOr types.path;
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default = null;
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description = "Path to PEM encoded server certificate.";
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};
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keyfile = mkOption {
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type = types.nullOr types.path;
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default = null;
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description = "Path to PEM encoded server key.";
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};
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host = mkOption {
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default = "0.0.0.0";
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example = "localhost";
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type = types.str;
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description = ''
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Host to listen on with SSL.
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'';
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};
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port = mkOption {
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default = 8883;
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example = 8883;
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type = types.int;
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description = ''
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Port on which to listen with SSL.
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'';
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};
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};
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dataDir = mkOption {
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default = "/var/lib/mosquitto";
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type = types.path;
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description = ''
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The data directory.
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'';
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};
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users = mkOption {
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type = types.attrsOf (types.submodule {
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options = {
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password = mkOption {
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type = with types; uniq (nullOr str);
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default = null;
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description = ''
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Specifies the (clear text) password for the MQTT User.
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'';
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};
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hashedPassword = mkOption {
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type = with types; uniq (nullOr str);
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default = null;
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description = ''
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Specifies the hashed password for the MQTT User.
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<option>hashedPassword</option> overrides <option>password</option>.
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To generate hashed password install <literal>mosquitto</literal>
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package and use <literal>mosquitto_passwd</literal>.
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'';
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};
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acl = mkOption {
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type = types.listOf types.str;
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example = [ "topic read A/B" "topic A/#" ];
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description = ''
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Control client access to topics on the broker.
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'';
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};
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};
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});
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example = { john = { password = "123456"; acl = [ "topic readwrite john/#" ]; }; };
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description = ''
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A set of users and their passwords and ACLs.
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'';
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};
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allowAnonymous = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Allow clients to connect without authentication.
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'';
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};
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checkPasswords = mkOption {
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default = false;
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example = true;
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type = types.bool;
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description = ''
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Refuse connection when clients provide incorrect passwords.
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'';
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};
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extraConf = mkOption {
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default = "";
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type = types.lines;
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description = ''
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Extra config to append to `mosquitto.conf` file.
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'';
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};
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aclExtraConf = mkOption {
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default = "";
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type = types.lines;
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description = ''
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Extra config to prepend to the ACL file.
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'';
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};
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};
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};
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###### Implementation
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config = mkIf cfg.enable {
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systemd.services.mosquitto = {
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description = "Mosquitto MQTT Broker Daemon";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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serviceConfig = {
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Type = "notify";
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NotifyAccess = "main";
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User = "mosquitto";
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Group = "mosquitto";
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RuntimeDirectory = "mosquitto";
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WorkingDirectory = cfg.dataDir;
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Restart = "on-failure";
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ExecStart = "${pkgs.mosquitto}/bin/mosquitto -c ${mosquittoConf}";
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ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
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};
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preStart = ''
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rm -f ${cfg.dataDir}/passwd
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touch ${cfg.dataDir}/passwd
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'' + concatStringsSep "\n" (
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mapAttrsToList (n: c:
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if c.hashedPassword != null then
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"echo '${n}:${c.hashedPassword}' >> ${cfg.dataDir}/passwd"
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else optionalString (c.password != null)
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"${pkgs.mosquitto}/bin/mosquitto_passwd -b ${cfg.dataDir}/passwd ${n} '${c.password}'"
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) cfg.users);
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};
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users.users.mosquitto = {
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description = "Mosquitto MQTT Broker Daemon owner";
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group = "mosquitto";
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uid = config.ids.uids.mosquitto;
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home = cfg.dataDir;
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createHome = true;
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};
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users.groups.mosquitto.gid = config.ids.gids.mosquitto;
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};
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}
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