CentOS 6
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MySQL 5.1 インストール
2014/08/23
 
CentOS 6 デフォルトの MySQL 5.1 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 5.1 をインストールして起動します。
[root@www ~]#
yum -y install mysql-server
[root@www ~]#
vi /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# 追記

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

Initializing MySQL database:  WARNING: The host 'www.srv.world' could not be looked up with resolveip.
This probably means that your libc libraries are not 100 % compatible
with this binary MySQL version. The MySQL daemon, mysqld, should work
normally with the exception that host name resolving will not work.
This means that you should use IP addresses instead of hostnames
when specifying MySQL privileges !
Installing MySQL system tables...
OK
Filling help tables...
OK
...
...
...
You can test the MySQL daemon with mysql-test-run.pl
cd /usr/mysql-test ; perl mysql-test-run.pl

Please report any problems with the /usr/bin/mysqlbug script!

                                              [  OK  ]
Starting mysqld:                      [  OK  ]

[root@www ~]#
chkconfig mysqld on

[2] MySQL の初期設定です。
[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

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:    
# 設定するパスワードを入力

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!

# root で接続確認

[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 11
Server version: 5.1.73 Source distribution

Copyright (c) 2000, 2013, 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.

# ユーザ一覧表示

mysql>
select user,host,password from mysql.user;

+------+-----------+-------------------------------------------+
| user | host      | password                                  |
+------+-----------+-------------------------------------------+
| root | localhost | ***************************************** |
| root | 127.0.0.1 | ***************************************** |
+------+-----------+-------------------------------------------+
2 rows in set (0.00 sec)

# データベース一覧表示

mysql>
show databases;

+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
+--------------------+
2 rows in set (0.00 sec)

mysql>
exit

Bye
[3] 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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