群晖没有提供Mysql的安装，但是提供了MariaDB，所以直接安装MariaDB即可。
1.安装官方套件MariaDB
设置好端口和root密码
2.ssh进入服务器,创建测试数据库
默认情况下无法远程连接
ssh进入群晖nas服务器，直接运行mysql命令
如果运行报错，可以进入 /usr/local/mariadb10/bin这个目录下再运行，或者进入
/volume1/@appstore/MariaDB10/usr/local/mariadb10/bin 这个目录。
创建好测试用的数据库。
zhonglaonianoldjava@DS918plus:~$ mysql -uroot -p数据库root密码
Welcome to the MariaDB monitor. Commands end with ; or g.
Your MariaDB connection id is 19
Server version: 10.3.32-MariaDB Source distribution
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
+--------------------+
3 rows in set (0.001 sec)
MariaDB [(none)]> create database test;
Query OK, 1 row affected (0.001 sec)
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.001 sec)
MariaDB [(none)]> use test;
Database changed
MariaDB [test]>
3.设置数据库权限，新建用户，并设置成可以远程访问
创建数据库中的新用户，注意密码复杂度必须要求有数字，特殊字符和大小写字母
MariaDB [test]> CREATE USER dbtestuser@'%' IDENTIFIED BY 'qqjavaold';
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements: [Minimal password length 10, Include mixed case, Include numeric characters, Include special characters]
MariaDB [test]> CREATE USER dbtestuser@'%' IDENTIFIED BY 'qqjavaold&zhihu';
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements: [Include mixed case, Include numeric characters]
MariaDB [test]> CREATE USER dbtestuser@'%' IDENTIFIED BY 'qqjavaold&ZH123';
Query OK, 0 rows affected (0.031 sec)
MariaDB [test]> show grants for dbtestuser;
+-----------------------------------------------------------------------------------------------------------+
| Grants for dbtestuser@% |
+-----------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO `dbtestuser`@`%` IDENTIFIED BY PASSWORD '*xxxxx' |
+-----------------------------------------------------------------------------------------------------------+
1 row in set (0.000 sec)
然后验证数据库可以远程连接了，但是还没有数据库的操作权限
于是给dbtestuser这个用户加上test这个数据库实例的所有权限
MariaDB [test]> grant all privileges on test.* to dbtestuser;
Query OK, 0 rows affected (0.001 sec)
MariaDB [test]> flush privileges;
Query OK, 0 rows affected (0.001 sec)
MariaDB [test]> show grants for dbtestuser;
+-----------------------------------------------------------------------------------------------------------+
| Grants for dbtestuser@% |
+-----------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO `dbtestuser`@`%` IDENTIFIED BY PASSWORD '*EAFA6F84C1B06C49EAF78DEF26C4077952FD7944' |
| GRANT ALL PRIVILEGES ON `test`.* TO `dbtestuser`@`%` |
+-----------------------------------------------------------------------------------------------------------+
2 rows in set (0.000 sec)
4.可以通过Spring+JPA自动建表进行测试了
