300 lines
9.1 KiB
Nix
300 lines
9.1 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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inherit (lib) mkDefault mkEnableOption mkForce mkIf mkMerge mkOption types;
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inherit (lib) concatStringsSep literalExample mapAttrsToList optional optionalString;
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cfg = config.services.moodle;
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fpm = config.services.phpfpm.pools.moodle;
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user = "moodle";
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group = config.services.httpd.group;
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stateDir = "/var/lib/moodle";
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moodleConfig = pkgs.writeText "config.php" ''
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<?php // Moodle configuration file
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unset($CFG);
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global $CFG;
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$CFG = new stdClass();
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$CFG->dbtype = '${ { "mysql" = "mariadb"; "pgsql" = "pgsql"; }.${cfg.database.type} }';
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$CFG->dblibrary = 'native';
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$CFG->dbhost = '${cfg.database.host}';
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$CFG->dbname = '${cfg.database.name}';
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$CFG->dbuser = '${cfg.database.user}';
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${optionalString (cfg.database.passwordFile != null) "$CFG->dbpass = file_get_contents('${cfg.database.passwordFile}');"}
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$CFG->prefix = 'mdl_';
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$CFG->dboptions = array (
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'dbpersist' => 0,
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'dbport' => '${toString cfg.database.port}',
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${optionalString (cfg.database.socket != null) "'dbsocket' => '${cfg.database.socket}',"}
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'dbcollation' => 'utf8mb4_unicode_ci',
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);
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$CFG->wwwroot = '${if cfg.virtualHost.enableSSL then "https" else "http"}://${cfg.virtualHost.hostName}';
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$CFG->dataroot = '${stateDir}';
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$CFG->admin = 'admin';
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$CFG->directorypermissions = 02777;
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$CFG->disableupdateautodeploy = true;
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$CFG->pathtogs = '${pkgs.ghostscript}/bin/gs';
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$CFG->pathtophp = '${pkgs.php}/bin/php';
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$CFG->pathtodu = '${pkgs.coreutils}/bin/du';
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$CFG->aspellpath = '${pkgs.aspell}/bin/aspell';
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$CFG->pathtodot = '${pkgs.graphviz}/bin/dot';
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require_once('${cfg.package}/share/moodle/lib/setup.php');
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// There is no php closing tag in this file,
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// it is intentional because it prevents trailing whitespace problems!
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'';
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mysqlLocal = cfg.database.createLocally && cfg.database.type == "mysql";
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pgsqlLocal = cfg.database.createLocally && cfg.database.type == "pgsql";
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in
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{
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# interface
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options.services.moodle = {
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enable = mkEnableOption "Moodle web application";
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package = mkOption {
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type = types.package;
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default = pkgs.moodle;
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defaultText = "pkgs.moodle";
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description = "The Moodle package to use.";
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};
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initialPassword = mkOption {
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type = types.str;
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example = "correcthorsebatterystaple";
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description = ''
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Specifies the initial password for the admin, i.e. the password assigned if the user does not already exist.
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The password specified here is world-readable in the Nix store, so it should be changed promptly.
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'';
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};
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database = {
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type = mkOption {
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type = types.enum [ "mysql" "pgsql" ];
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default = "mysql";
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description = ''Database engine to use.'';
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};
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host = mkOption {
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type = types.str;
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default = "localhost";
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description = "Database host address.";
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};
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port = mkOption {
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type = types.int;
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description = "Database host port.";
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default = {
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"mysql" = 3306;
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"pgsql" = 5432;
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}.${cfg.database.type};
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defaultText = "3306";
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};
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name = mkOption {
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type = types.str;
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default = "moodle";
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description = "Database name.";
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};
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user = mkOption {
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type = types.str;
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default = "moodle";
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description = "Database user.";
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};
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passwordFile = mkOption {
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type = types.nullOr types.path;
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default = null;
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example = "/run/keys/moodle-dbpassword";
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description = ''
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A file containing the password corresponding to
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<option>database.user</option>.
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'';
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};
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socket = mkOption {
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type = types.nullOr types.path;
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default =
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if mysqlLocal then "/run/mysqld/mysqld.sock"
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else if pgsqlLocal then "/run/postgresql"
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else null;
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defaultText = "/run/mysqld/mysqld.sock";
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description = "Path to the unix socket file to use for authentication.";
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};
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createLocally = mkOption {
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type = types.bool;
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default = true;
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description = "Create the database and database user locally.";
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};
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};
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virtualHost = mkOption {
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type = types.submodule ({
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options = import ../web-servers/apache-httpd/per-server-options.nix {
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inherit lib;
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forMainServer = false;
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};
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});
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example = {
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hostName = "moodle.example.org";
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enableSSL = true;
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adminAddr = "webmaster@example.org";
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sslServerCert = "/var/lib/acme/moodle.example.org/full.pem";
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sslServerKey = "/var/lib/acme/moodle.example.org/key.pem";
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};
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description = ''
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Apache configuration can be done by adapting <option>services.httpd.virtualHosts</option>.
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See <xref linkend="opt-services.httpd.virtualHosts"/> for further information.
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'';
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};
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poolConfig = mkOption {
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type = with types; attrsOf (oneOf [ str int bool ]);
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default = {
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"pm" = "dynamic";
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"pm.max_children" = 32;
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"pm.start_servers" = 2;
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"pm.min_spare_servers" = 2;
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"pm.max_spare_servers" = 4;
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"pm.max_requests" = 500;
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};
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description = ''
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Options for the Moodle PHP pool. See the documentation on <literal>php-fpm.conf</literal>
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for details on configuration directives.
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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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assertions = [
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{ assertion = cfg.database.createLocally -> cfg.database.user == user;
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message = "services.moodle.database.user must be set to ${user} if services.moodle.database.createLocally is set true";
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}
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{ assertion = cfg.database.createLocally -> cfg.database.passwordFile == null;
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message = "a password cannot be specified if services.moodle.database.createLocally is set to true";
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}
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];
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services.mysql = mkIf mysqlLocal {
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enable = true;
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package = mkDefault pkgs.mariadb;
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ensureDatabases = [ cfg.database.name ];
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ensureUsers = [
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{ name = cfg.database.user;
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ensurePermissions = {
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"${cfg.database.name}.*" = "SELECT, INSERT, UPDATE, DELETE, CREATE, CREATE TEMPORARY TABLES, DROP, INDEX, ALTER";
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};
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}
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];
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};
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services.postgresql = mkIf pgsqlLocal {
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enable = true;
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ensureDatabases = [ cfg.database.name ];
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ensureUsers = [
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{ name = cfg.database.user;
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ensurePermissions = { "DATABASE ${cfg.database.name}" = "ALL PRIVILEGES"; };
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}
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];
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};
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services.phpfpm.pools.moodle = {
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inherit user group;
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phpEnv.MOODLE_CONFIG = "${moodleConfig}";
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phpOptions = ''
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zend_extension = opcache.so
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opcache.enable = 1
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'';
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settings = {
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"listen.owner" = config.services.httpd.user;
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"listen.group" = config.services.httpd.group;
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} // cfg.poolConfig;
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};
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services.httpd = {
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enable = true;
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adminAddr = mkDefault cfg.virtualHost.adminAddr;
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extraModules = [ "proxy_fcgi" ];
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virtualHosts = [ (mkMerge [
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cfg.virtualHost {
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documentRoot = mkForce "${cfg.package}/share/moodle";
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extraConfig = ''
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<Directory "${cfg.package}/share/moodle">
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<FilesMatch "\.php$">
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<If "-f %{REQUEST_FILENAME}">
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SetHandler "proxy:unix:${fpm.socket}|fcgi://localhost/"
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</If>
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</FilesMatch>
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Options -Indexes
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DirectoryIndex index.php
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</Directory>
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'';
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}
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]) ];
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};
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systemd.tmpfiles.rules = [
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"d '${stateDir}' 0750 ${user} ${group} - -"
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];
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systemd.services.moodle-init = {
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wantedBy = [ "multi-user.target" ];
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before = [ "phpfpm-moodle.service" ];
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after = optional mysqlLocal "mysql.service" ++ optional pgsqlLocal "postgresql.service";
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environment.MOODLE_CONFIG = moodleConfig;
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script = ''
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${pkgs.php}/bin/php ${cfg.package}/share/moodle/admin/cli/check_database_schema.php && rc=$? || rc=$?
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[ "$rc" == 1 ] && ${pkgs.php}/bin/php ${cfg.package}/share/moodle/admin/cli/upgrade.php \
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--non-interactive \
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--allow-unstable
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[ "$rc" == 2 ] && ${pkgs.php}/bin/php ${cfg.package}/share/moodle/admin/cli/install_database.php \
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--agree-license \
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--adminpass=${cfg.initialPassword}
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true
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'';
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serviceConfig = {
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User = user;
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Group = group;
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Type = "oneshot";
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};
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};
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systemd.services.moodle-cron = {
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description = "Moodle cron service";
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after = [ "moodle-init.service" ];
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environment.MOODLE_CONFIG = moodleConfig;
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serviceConfig = {
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User = user;
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Group = group;
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ExecStart = "${pkgs.php}/bin/php ${cfg.package}/share/moodle/admin/cli/cron.php";
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};
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};
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systemd.timers.moodle-cron = {
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description = "Moodle cron timer";
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnCalendar = "minutely";
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};
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};
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systemd.services.httpd.after = optional mysqlLocal "mysql.service" ++ optional pgsqlLocal "postgresql.service";
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users.users."${user}".group = group;
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};
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}
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