CentOS 7
 

MySQL 5.7 : インストール
2017/01/17
 
MySQL 5.7 をインストールし、データベースサーバーを構築します。
[1] MySQL 5.7 は CentOS SCLo Software Collections からインストール可能です。
なお、デフォルトの MariaDB がインストールされた状態でも、Software Collections パッケージは別パスにインスールされるため、共存が可能となっています。
# SCLoからインストール

[root@www ~]#
yum --enablerepo=centos-sclo-rh -y install rh-mysql57-mysql-server
[2] Software Collections パッケージは /opt 配下にインストールされます。
環境変数を読み込んで利用するには以下のように実行します。
# 環境変数を読み込む

[root@www ~]#
scl enable rh-mysql57 bash
[root@www ~]#
mysql -V

mysql Ver 14.14 Distrib 5.7.16, for Linux (x86_64) using EditLine wrapper
[root@www ~]#
which mysql

/opt/rh/rh-mysql57/root/usr/bin/mysql
[3] ログイン時に自動的に有効にするには以下のように設定します。
[root@www ~]#
vi /etc/profile.d/rh-mysql57.sh
# 以下の内容で新規作成

#!/bin/bash

source /opt/rh/rh-mysql57/enable
export X_SCLS="`scl enable rh-mysql57 'echo $X_SCLS'`"
[4] MySQL 5.7 を有効にして初期設定を実施します。
[root@www ~]#
vi /etc/opt/rh/rh-mysql57/my.cnf.d/rh-mysql57-mysql-server.cnf
# [mysqld] セクション内に追記

[mysqld]
character-set-server=utf8
[root@www ~]#
systemctl start rh-mysql57-mysqld

[root@www ~]#
systemctl enable rh-mysql57-mysqld

[root@www ~]#
mysql_secure_installation


Securing the MySQL server deployment.

Connecting to MySQL using a blank password.

VALIDATE PASSWORD PLUGIN can be used to test passwords
and improve security. It checks the strength of password
and allows the users to set only those passwords which are
secure enough. Would you like to setup VALIDATE PASSWORD plugin?

# パスワード品質チェックプラグインの有効化の選択
Press y|Y for Yes, any other key for No: y

There are three levels of password validation policy:

LOW    Length >= 8
MEDIUM Length >= 8, numeric, mixed case, and special characters
STRONG Length >= 8, numeric, mixed case, special characters and dictionary     file

# パスワード品質チェックの強度の選択
Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG: 2
Please set the password for root here.

# root パスワードを設定
New password:

Re-enter new password:
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL 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.

# 匿名ユーザー削除
Remove anonymous users? (Press y|Y for Yes, any other key for No) : 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.

# root のリモートログイン有効/無効
Disallow root login remotely? (Press y|Y for Yes, any other key for No) : y
Success.

By default, MySQL 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.

# テストデータベース削除
Remove test database and access to it? (Press y|Y for Yes, any other key for No) : 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.

# 特権情報リロード
Reload privilege tables now? (Press y|Y for Yes, any other key for No) : y
Success.

All done!

# MySQL に root ユーザーで接続

[root@www ~]#
mysql -u root -p

Enter password:    
# 設定したパスワードで認証

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.7.16 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

# ユーザー情報一覧表示

mysql>
select user,host from mysql.user;

+-----------+-----------+
| user      | host      |
+-----------+-----------+
| mysql.sys | localhost |
| root      | localhost |
+-----------+-----------+
2 rows in set (0.00 sec)

# データベース一覧表示

mysql>
show databases;

+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.00 sec)

mysql>
exit

Bye
[5] MySQL を他ホストからも利用する場合 且つ Firewalld を有効にしている場合は、MySQL サービスの許可が必要です。なお、MySQL は 3306/TCP を使用します。
[root@www ~]#
firewall-cmd --add-service=mysql --permanent

success
[root@www ~]#
firewall-cmd --reload

success
 
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