Install MariaDB10.3 on CentOS 7

Install MariaDB on CentOS 7

https://linuxize.com/post/install-mariadb-on-centos-7/

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sudo gedit /etc/yum.repos.d/MariaDB.repo

# MariaDB 10.3 CentOS repository list - created 2018-05-25 19:02 UTC
# http://downloads.mariadb.org/mariadb/repositories/
[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.3/centos7-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1

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sudo yum -y install MariaDB-server MariaDB-client

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sudo systemctl enable mariadbsudo systemctl start mariadb

mysql -V

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sudo mysql_secure_installation

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mysql -u root -p

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*インストール直後、文字コード確認
Show variables like 'character_set%';

*インストール直後、テーブル名の　大文字 小文字の区別をしているか確認
show variables where variable_name='lower_case_table_names';

lower_case_table_names  0 大文字と小文字を区別する Default

lower_case_table_names  1 小文字で格納

lower_case_table_names  2 全て大文字で格納

WindowsやMacOSは大文字小文字の区別しないみたいなので、注意が必要

Windowsにインストールした場合は、デフォルト　1

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sudo gedit /etc/my.cnf

[mysqld]
#skip-name-resolve
lower_case_table_names = 1
character-set-server = utf8
innodb_buffer_pool_size = 32M

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再起動
systemctl restart mariadb.service

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設定を再度確認

Show variables like 'character_set%';

show variables where variable_name='lower_case_table_names';

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 Firewall 3306 port をopen

firewall-cmd --add-port=3306/tcp --zone=public --permanent

firewall-cmd --reload             

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*データベースの作成と、接続権限

Create Database testdb　CHRACTER SET utf8;

grant all privileges on *.* to mausr1 identified by 'Passwd6';

FLUSH PRIVILEGES;

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---------------------------Err---------------------------
[FireDAC][Phys][MySQL] Can't connect to MySQL server on 'localhost' (10061)
---------------------------

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find / -name my*.cnf

/etc/my.cnf
/etc/my.cnf.d/mysql-clients.cnf
/etc/my.cnf.d/server.cnf