一、dnf安装

CentOS 8 支持dnf，dnf安装MySQL

sudo dnf install @mysql

二、开机自启动

[root@iZ2ze30dygwd6yh7gu6lskZ ~]# sudo systemctl enable --now mysqld
Created symlink /etc/systemd/system/multi-user.target.wants/mysqld.service → /usr/lib/systemd/system/mysqld.service.

三、查看状态

[root@iZ2ze30dygwd6yh7gu6lskZ ~]# sudo systemctl status mysqld
● mysqld.service - MySQL 8.0 database server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: active (running) since Wed 2021-02-17 10:30:16 CST; 38s ago
  Process: 27178 ExecStartPost=/usr/libexec/mysql-check-upgrade (code=exited, status=0/SUCCESS)
  Process: 27052 ExecStartPre=/usr/libexec/mysql-prepare-db-dir mysqld.service (code=exited, status=0/SUCCESS)
  Process: 27027 ExecStartPre=/usr/libexec/mysql-check-socket (code=exited, status=0/SUCCESS)
 Main PID: 27134 (mysqld)
   Status: "Server is operational"
    Tasks: 39 (limit: 26213)
   Memory: 429.8M
   CGroup: /system.slice/mysqld.service
           └─27134 /usr/libexec/mysqld --basedir=/usr

Feb 17 10:30:11 iZ2ze30dygwd6yh7gu6lskZ systemd[1]: Starting MySQL 8.0 database server...
Feb 17 10:30:11 iZ2ze30dygwd6yh7gu6lskZ mysql-prepare-db-dir[27052]: Initializing MySQL database
Feb 17 10:30:16 iZ2ze30dygwd6yh7gu6lskZ systemd[1]: Started MySQL 8.0 database server.

四、安全设置

是否进入设置：y

选择密码验证策略等级：2（强）
若依RuoYi框架浅析部署篇②——CentOS 8 配置MySQL 8.0
输入密码，确认密码

是否移除匿名用户：y

是否禁止远程登录：n

是否移除test数据库：y

是否重新载入权限表：y

五、开放远程连接

[root@iZ2ze30dygwd6yh7gu6lskZ ~]# mysql -u root -p
Enter password: 
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
[root@iZ2ze30dygwd6yh7gu6lskZ ~]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 12
Server version: 8.0.21 Source distribution

Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> update user set host='%' where user='root';
Query OK, 1 row affected (0.01 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> exit
Bye