119 lines
3.3 KiB
Nix
119 lines
3.3 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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inherit (lib) concatMapStringsSep concatStringsSep isInt isList literalExpression;
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inherit (lib) mapAttrs mapAttrsToList mkDefault mkEnableOption mkIf mkOption optional types;
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cfg = config.services.automysqlbackup;
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pkg = pkgs.automysqlbackup;
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user = "automysqlbackup";
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group = "automysqlbackup";
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toStr = val:
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if isList val then "( ${concatMapStringsSep " " (val: "'${val}'") val} )"
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else if isInt val then toString val
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else if true == val then "'yes'"
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else if false == val then "'no'"
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else "'${toString val}'";
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configFile = pkgs.writeText "automysqlbackup.conf" ''
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#version=${pkg.version}
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# DONT'T REMOVE THE PREVIOUS VERSION LINE!
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#
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${concatStringsSep "\n" (mapAttrsToList (name: value: "CONFIG_${name}=${toStr value}") cfg.config)}
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'';
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in
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{
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# interface
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options = {
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services.automysqlbackup = {
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enable = mkEnableOption "AutoMySQLBackup";
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calendar = mkOption {
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type = types.str;
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default = "01:15:00";
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description = lib.mdDoc ''
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Configured when to run the backup service systemd unit (DayOfWeek Year-Month-Day Hour:Minute:Second).
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'';
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};
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config = mkOption {
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type = with types; attrsOf (oneOf [ str int bool (listOf str) ]);
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default = {};
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description = lib.mdDoc ''
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automysqlbackup configuration. Refer to
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{file}`''${pkgs.automysqlbackup}/etc/automysqlbackup.conf`
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for details on supported values.
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'';
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example = literalExpression ''
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{
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db_names = [ "nextcloud" "matomo" ];
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table_exclude = [ "nextcloud.oc_users" "nextcloud.oc_whats_new" ];
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mailcontent = "log";
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mail_address = "admin@example.org";
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}
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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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assertions = [
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{ assertion = !config.services.mysqlBackup.enable;
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message = "Please choose one of services.mysqlBackup or services.automysqlbackup.";
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}
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];
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services.automysqlbackup.config = mapAttrs (name: mkDefault) {
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mysql_dump_username = user;
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mysql_dump_host = "localhost";
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mysql_dump_socket = "/run/mysqld/mysqld.sock";
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backup_dir = "/var/backup/mysql";
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db_exclude = [ "information_schema" "performance_schema" ];
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mailcontent = "stdout";
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mysql_dump_single_transaction = true;
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};
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systemd.timers.automysqlbackup = {
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description = "automysqlbackup timer";
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnCalendar = cfg.calendar;
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AccuracySec = "5m";
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};
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};
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systemd.services.automysqlbackup = {
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description = "automysqlbackup service";
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serviceConfig = {
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User = user;
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Group = group;
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ExecStart = "${pkg}/bin/automysqlbackup ${configFile}";
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};
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};
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environment.systemPackages = [ pkg ];
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users.users.${user} = {
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group = group;
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isSystemUser = true;
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};
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users.groups.${group} = { };
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systemd.tmpfiles.rules = [
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"d '${cfg.config.backup_dir}' 0750 ${user} ${group} - -"
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];
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services.mysql.ensureUsers = optional (config.services.mysql.enable && cfg.config.mysql_dump_host == "localhost") {
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name = user;
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ensurePermissions = { "*.*" = "SELECT, SHOW VIEW, TRIGGER, LOCK TABLES, EVENT"; };
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};
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};
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}
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