29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
82 lines
1.8 KiB
Nix
82 lines
1.8 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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inherit (pkgs) mysql gzip;
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cfg = config.services.mysqlBackup ;
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location = cfg.location ;
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mysqlBackupCron = db : ''
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${cfg.period} ${cfg.user} ${mysql}/bin/mysqldump ${if cfg.singleTransaction then "--single-transaction" else ""} ${db} | ${gzip}/bin/gzip -c > ${location}/${db}.gz
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'';
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in
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{
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options = {
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services.mysqlBackup = {
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enable = mkOption {
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default = false;
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description = ''
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Whether to enable MySQL backups.
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'';
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};
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period = mkOption {
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default = "15 01 * * *";
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description = ''
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This option defines (in the format used by cron) when the
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databases should be dumped.
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The default is to update at 01:15 (at night) every day.
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'';
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};
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user = mkOption {
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default = "mysql";
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description = ''
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User to be used to perform backup.
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'';
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};
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databases = mkOption {
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default = [];
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description = ''
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List of database names to dump.
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'';
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};
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location = mkOption {
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default = "/var/backup/mysql";
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description = ''
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Location to put the gzipped MySQL database dumps.
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'';
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};
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singleTransaction = mkOption {
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default = false;
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description = ''
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Whether to create database dump in a single transaction
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'';
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};
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};
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};
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config = mkIf config.services.mysqlBackup.enable {
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services.cron.systemCronJobs = map mysqlBackupCron config.services.mysqlBackup.databases;
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system.activationScripts.mysqlBackup = stringAfter [ "stdio" "users" ]
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''
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mkdir -m 0700 -p ${config.services.mysqlBackup.location}
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chown ${config.services.mysqlBackup.user} ${config.services.mysqlBackup.location}
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'';
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};
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}
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