mariadb版本升级

将Mariadb 5.*升级到10.2.9，官方源下载慢，改为国内镜像源

1、停止原服务 

systemctl stop mariadb

 2、增加mariadb安装源 

touch /etc/yum.repos.d/MariaDB.repo
vim /etc/yum.repos.d/MariaDB.repo
添加内容
[mariadb]  
name = MariaDB 
baseurl = http://mirrors.tuna.tsinghua.edu.cn/mariadb/mariadb-10.2.9/yum/centos7-amd64/
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB 
gpgcheck=1

 3、卸载旧版本 

yum remove mariadb-server mariadb mariadb-lib
yum clean all

 4、安装Mariadb 

yum install MariaDB-server MariaDB-client

 5、启动服务

systemctl start mysql.service

 6、验证

mysql -uroot -p

 Welcome to the MariaDB monitor.  Commands end with ; or \g.

Your MariaDB connection id is 21

Server version: 10.2.9-MariaDB MariaDB Server

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