MariaDB 是一个开源数据库服务器，由 Michael ‘Monty’ Widenius（MySQL 的创建者）创建和开发。
我们也可以说 MariaDB 是 MySQL Server 的替代品，并且与 MySQL 数据库兼容。

在这篇文章中，我们将讨论如何在 CentOS 7 中安装和连接 MariaDB

默认情况下，MariaDB 软件包未列在 CentOS 存储库中，因此要先安装它，我们必须启用 MariaDB 存储库。

安装 MariaDB

打开终端并输入以下 yum 命令。

# yum install MariaDB-server MariaDB-client

在安装时，我们可以得到以下冲突错误：

Transaction check error:
 file /etc/my.cnf from install of MariaDB-common-10.0.14-1.el7.centos.x86_64 conflicts with file from package mariadb-libs-1:5.5.35-3.el7.x86_64
file /usr/share/mysql/charsets/Index.xml from install of MariaDB-common-10.0.14-1.el7.centos.x86_64 conflicts with file from package mariadb-libs-1:5.5.35-3.el7.x86_64

因此，要解决此问题，请删除 postfix 和 mariadb-libs：

# yum remove postfix mariadb-libs-5.5.35-3.el7.x86_64

现在再次重新运行上面的 yum 命令来安装 MariaDB 服务器。

启动 MariaDB 服务

# systemctl start mysql.service

现在设置 MariaDB 根密码：

# mysql_secure_installation 
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.
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 authorization.
Set root password? [Y/n] Y
New password: 
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.
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.
Disallow root login remotely? [Y/n] Y
 ... Success!
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.
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.
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!

连接到 MariaDB 数据库服务器：

# mysql -u root -p
Enter password: 
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 11
Server version: 10.0.14-MariaDB MariaDB Server
Copyright (c) 2000, 2014, Oracle, SkySQL Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]>

设置 MariaDB 存储库

使用以下内容创建文件 /etc/yum.repos.d/MariaDB.repo：

# MariaDB 10.0 CentOS repository list - created 2014-10-23 13:06 UTC
# http://mariadb.org/mariadb/repositories/
[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.0/centos7-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1