4. MariaDBのインストール(root)
4.1. MariaDBのインストール
# yum install -y mariadb mariadb-server mariadb-devel
4.2. DBの起動
# systemctl start mariadb
4.3. DBの自動起動
# systemctl enable mariadb
【表示結果】
Created symlink from /etc/systemd/system/multi-user.target.wants/mariadb.service to
/usr/lib/systemd/system/mariadb.service.
4.4. DB version確認
# mysql --version
【表示結果】
mysql Ver 15.1 Distrib 5.5.56-MariaDB, for Linux (x86_64) using readline 5.1
4.5. MariaDB初期設定
dbuser (ユーザ名：root , パスワード：moracle）
【編集内容】赤文字の箇所対応する (rootユーザのパスワード設定とその他の設定）
# mysql_secure_installation
【表示結果】
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 authorisation.
Set root password? [Y/n] 【Enter】
New password: 【DBのrootのパスワード入力】
Re-enter new password: 【DBのrootのパスワード入力確認】
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] 【Enter】
... 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] 【Enter】
... 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] 【Enter】
- 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] 【Enter】
... 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!
4.6. server.cnfの編集
# vi /etc/my.cnf.d/server.cnf
【編集内容】赤文字の箇所を追加
[mariadb]
character-set-server = utf8
[mariadb-5.5]
4.7. client.cnfの編集
# vi /etc/my.cnf.d/client.cnf
【編集内容】赤文字の箇所を追加
[client-mariadb]
default-character-set = utf8
4.8. DB再起動
# systemctl restart mariadb
4.9. DBrootユーザの接続確認
# mysql --user=root --password=moracle
MariaDB [(none)]> show variables like "chara%";
【結果内容】 赤文字の箇所がutf8になっているか確認
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
4.10. DBユーザ作成
MariaDB [(none)]> GRANT ALL ON *.* TO pkun@"localhost"IDENTIFIED BY
"mpkun";
MariaDB [(none)]> quit;
4.11. DBユーザの接続確認
dbuser (ユーザ名：pkun , パスワード：mpkun）
4.10で作成したpkunユーザでmysqlに接続できるかの確認
# mysql --user=pkun --password=mpkun
MariaDB [(none)]> quit;
4.12. DB(production環境)のパスワード設定
production環境での設定をする必要がある
# touch /etc/environment
# echo 'PKUN_DATABASE_PASSWORD="mpkun"' >> /etc/environment
# chown pkun:pkun /etc/environment
