CentOS 6
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MySQL 5.6 インストール
2016/08/08
 
CentOS 6 標準の MySQL のバージョンは 5.1系ですが、5.6系を RPM パッケージでインストールします。
[1] MySQL 5.6 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 MySQL 5.1 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-mysql56-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-mysql56 bash
[root@www ~]#
mysql -V

mysql Ver 14.14 Distrib 5.6.26, for Linux (x86_64) using EditLine wrapper
[root@www ~]#
which mysql

/opt/rh/rh-mysql56/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-mysql56.sh
# 以下の内容で新規作成

#!/bin/bash

source /opt/rh/rh-mysql56/enable
export X_SCLS="`scl enable rh-mysql56 'echo $X_SCLS'`"
[4] MySQL 5.6 を有効にして初期設定を実施します。
[root@www ~]#
vi /etc/opt/rh/rh-mysql56/my.cnf.d/mysql-server.cnf
# [mysqld] セクション内に追記

[mysqld]
character-set-server=utf8
[root@www ~]#
/etc/rc.d/init.d/rh-mysql56-mysqld start

[root@www ~]#
chkconfig rh-mysql56-mysqld on

[root@www ~]#
mysql_secure_installation


NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
      SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!

In order to log into MySQL to secure it, we'll need the current
password for the root user.  If you've just installed MySQL, 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 MySQL
root user without the proper authorisation.

# root パスワードを設定

Set root password? [Y/n]
y

New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
 ... Success!

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.
# 匿名ユーザーは削除

Remove anonymous users? [Y/n]
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は無効

Disallow root login remotely? [Y/n]
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は削除

Remove test database and access to it? [Y/n]
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? [Y/n]
y

 ... Success!

Cleaning up...

All done!  If you've completed all of the above steps, your MySQL
installation should now be secure.

Thanks for using MySQL!

# 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 13
Server version: 5.6.26 MySQL Community Server (GPL)

Copyright (c) 2000, 2015, 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,password from mysql.user;

+------+-----------+-------------------------------------------+
| user | host      | password                                  |
+------+-----------+-------------------------------------------+
| root | localhost | *xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx |
| root | 127.0.0.1 | *xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx |
| root | ::1       | *xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx |
+------+-----------+-------------------------------------------+
3 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 |
+--------------------+
3 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 IPTables を有効にしている場合は、MySQL ポートの許可が必要です。MySQL は 3306/TCP を使用します。なお、「-I INPUT 5」の箇所は自身の環境を確認して、適切な値に置き換えてください。
[root@www ~]#
iptables -I INPUT 5 -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT
 
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