CentOS7 安装 MariaDB

在CentOS7以上版本上，不再使用MySQL数据库,而是使用MariaDB数据库,其中MariaDB是MySQL的一个分支.现在写上个人在CentOS7里安装配置MariaDB的步骤:

1. 下载安装MariaDB

yum -y install mariadb-server mariadb


2. 启动MariaDB,并设置root用户的密码:

#启动MariaDB服务

[root@localhost /]# systemctl start mariadb

#设置MariaDB开机默认启动
[root@localhost /]# systemctl enable mariadb

ln -s '/usr/lib/systemd/system/mariadb.service' '/etc/systemd/system/multi-user.target.wants/mariadb.service'

#测试是否成功启动
[root@localhost /]# mysql
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 3
Server version: 5.5.47-MariaDB MariaDB Server

Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others.

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


#查看默认安装了哪些数据库
MariaDB [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
+--------------------+
4 rows in set (0.00 sec)


#退出
MariaDB [(none)]> exit
Bye


#在生产环境里安装完后,建议一定要运行一次mysql_secure_installation安全配置向导
[root@localhost /]# mysql_secure_installation
/usr/bin/mysql_secure_installation: line 379: find_mysql_client: command not found


NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
      SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!


In order to log into MariaDB to secure it, we'll need the current
password for the root user.  If you've just installed MariaDB, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.


#由于一开始安装MariaDB数据库后, root用户默认密码为空, 所以只需要按Enter键
Enter current password for root (enter for none):
OK, successfully used password, moving on...


Setting the root password ensures that nobody can log into the MariaDB
root user without the proper authorisation.


#是否设置root用户的新密码

Set root password? [Y/n] y

#录入新密码

New password:

#确认新密码

Re-enter new password:

Password updated successfully!
Reloading privilege tables..
 ... Success!




By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them.  This is intended only for testing, and to make the installation
go a bit smoother.  You should remove them before moving into a
production environment.


#是否删除匿名用户,生产环境建议删除
Remove anonymous users? [Y/n] y
 ... Success!


Normally, root should only be allowed to connect from 'localhost'.  This
ensures that someone cannot guess at the root password from the network.


#是否禁止root远程登录,根据自己的需求选择
Disallow root login remotely? [Y/n] n
 ... skipping.


By default, MariaDB comes with a database named 'test' that anyone can
access.  This is also intended only for testing, and should be removed
before moving into a production environment.


#是否删除test数据库
Remove test database and access to it? [Y/n] y
 - Dropping test database...
 ... Success!
 - Removing privileges on test database...
 ... Success!


Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.


#是否重新加载权限表
Reload privilege tables now? [Y/n] y
 ... Success!


Cleaning up...


All done!  If you've completed all of the above steps, your MariaDB
installation should now be secure.


Thanks for using MariaDB!


#安全设置完成后,测试使用root用户登录操作
[root@localhost /]# mysql -uroot -p
Enter password:
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 13
Server version: 5.5.47-MariaDB MariaDB Server


Copyright (c) 2000, 2015, 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 (0.00 sec)