centos7-mariadb安装

原文：https://www.bbsmax.com/A/6pdDE6rLzw/

1. 下载mariadb ：https://downloads.mariadb.org/  我选择mariadb-10.0.20-linux-x86_64.tar.gz这个版本
2. 复制安装文件 /opt 目录下 并解压到当前目录 tar -zxf mariadb-10.0.20-linux-x86_64.tar.gz
3. 把解压的文件名改为mariadb
4. groupadd mysql
5. useradd -g mysql mysql
6. cd /opt/mariadb
7. chown -R mysql:mysql /opt/mariadb/data
8. 把mariadb/support-files下的my-medium.cnf复制到mariadb目录下，并改为my.cnf
9. ./scripts/mysql_install_db --defaults-file=./my.cnf                 //初始化数据库 ,此步骤会报错，执行yum install libaio
10. cp support-files/mysql.server /etc/rc.d/init.d/mysqld
11. chmod +x /etc/rc.d/init.d/mysqld
12. cp support-files/my-large.cnf /etc/my.cnf
13. 修改 /etc/rc.d/init.d/mysqld  basedir=/opt/mariadb     datadir=/opt/mariadb/data
14. service mysqld start
15. 修改环境变量 添加mariadb的bin目录 编辑/etc/profile，添加export PATH=$PATH:/opt/mariadb/bin/
16. 修改root用户密码 ./bin/mysqladmin -u root password '123456'
17. 登录mysql ./bin/mysql -u root -p
18. 设置数据库权限:

1. MySQL [(none)]> use mysql;
2. MySQL [mysql]> update user set host='%' where user='root' and host='127.0.0.1';
3. MySQL [mysql]> grant all privileges on *.* to 'root'@'%' identified by '123456' with grant option;
4. MySQL [mysql]> flush privileges;

9步骤的日志如下

Installing MariaDB/MySQL system tables in './data' ...
2017-11-27 16:43:13 139861016680192 [Warning] Failed to load slave replication state from table mysql.gtid_slave_pos: 1146: Table 'mysql.gtid_slave_pos' doesn't exist
OK

To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system

PLEASE REMEMBER TO SET A PASSWORD FOR THE MariaDB root USER !
To do so, start the server, then issue the following commands:

'./bin/mysqladmin' -u root password 'new-password'
'./bin/mysqladmin' -u root -h xxxxxx(阿里云实例id) password 'new-password'

Alternatively you can run:
'./bin/mysql_secure_installation'

which will also give you the option of removing the test
databases and anonymous user created by default. This is
strongly recommended for production servers.

See the MariaDB Knowledgebase at http://mariadb.com/kb or the
MySQL manual for more instructions.

You can start the MariaDB daemon with:
cd '.' ; ./bin/mysqld_safe --datadir='./data'

You can test the MariaDB daemon with mysql-test-run.pl
cd './mysql-test' ; perl mysql-test-run.pl

Please report any problems at http://mariadb.org/jira

The latest information about MariaDB is available at http://mariadb.org/.
You can find additional information about the MySQL part at:
http://dev.mysql.com
Consider joining MariaDB's strong and vibrant community:
https://mariadb.org/get-involved/

 14步骤报错日志：

[root@iz2ze9hcysthc28l5tgqrpz init.d]# service mysqld start
Starting MySQL.171127 16:59:01 mysqld_safe Logging to '/opt/mariadb/data/（实例id）.err'.
171127 16:59:01 mysqld_safe Starting mysqld daemon with databases from /opt/mariadb/data
[FAILED]
[root@iz2ze9hcysthc28l5tgqrpz init.d]# tail -300f /opt/（实例id）.err
171127 16:59:01 mysqld_safe Starting mysqld daemon with databases from /opt/mariadb/data
2017-11-27 16:59:02 140540362131264 [Note] /opt/mariadb/bin/mysqld (mysqld 10.2.7-MariaDB-log) starting as process 2611 ...
2017-11-27 16:59:02 140540362131264 [ERROR] mysqld: File './mysql-bin.index' not found (Errcode: 13 "Permission denied")
2017-11-27 16:59:02 140540362131264 [ERROR] Aborting

14步解决方案 

chgrp -R mysql /opt/mariadb/data && chown -R mysql /opt/mariadb/data

18：无法远程连接，原因是因为防火墙，开启指定服务：

# firewall-cmd --permanent --add-service=mysql

# firewall-cmd --reload