클라우드 컴퓨팅에서 MySQL 서버를 구축하고 응용 프로그램에서 사용

[root@localhost ~]# yum install -y mysql-server
(略)
Complete!

[root@localhost ~]# service mysqld start
mysqld を起動中:                                           [  OK  ]

[root@localhost ~]# mysql -u root
(略)
mysql>

mysql> create database mydb;
Query OK, 1 row affected (0.00 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| bbs_development    |
| mydb               |
| mysql              |
| test               |
+--------------------+
5 rows in set (0.00 sec)

mysql> use mydb;

mysql> create table blog (id INTEGER PRIMARY KEY AUTO_INCREMENT, name VARCHAR(128), body TEXT);
Query OK, 0 rows affected (0.00 sec)

mysql> INSERT INTO blog (name, body) VALUES('takeuchi', 'hello, world');
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO blog (name, body) VALUES('kato', 'hello, world 2');
Query OK, 1 row affected (0.00 sec)

mysql> select * from blog;
+----+----------+----------------+
| id | name     | body           |
+----+----------+----------------+
|  1 | takeuchi | hello, world   |
|  2 | kato     | hello, world 2 |
+----+----------+----------------+
2 rows in set (0.00 sec)

mysql> UPDATE blog SET name='yamada' where id = 1;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select * from blog;
+----+--------+----------------+
| id | name   | body           |
+----+--------+----------------+
|  1 | yamada | hello, world   |
|  2 | kato   | hello, world 2 |
+----+--------+----------------+
2 rows in set (0.00 sec)

mysql> delete from blog where id = 1;
Query OK, 1 row affected (0.00 sec)

[root@localhost bbs]# mysql -u root

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'ここにアプリサーバーのプライベートIPアドレスを書く' WITH GRANT OPTION;
Query OK, 0 rows affected (0.00 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.01 sec)

[root@localhost ~]# yum install -y mysql-devel
[root@localhost ~]# curl -sSL https://get.rvm.io | bash -s stable
[root@localhost ~]# source /etc/profile.d/rvm.sh
[root@localhost ~]# rvm install 2.0.0
[root@localhost ~]# gem install rails --no-ri --no-rdoc
[root@localhost ~]# rails new bbs -d mysql
[root@localhost ~]# cd bbs/
[root@localhost bbs]# echo "gem 'therubyracer'" >> Gemfile
[root@localhost bbs]# bundle
[root@localhost bbs]# rails g scaffold bbs name:string 
comment:text

[root@localhost bbs]# sed -i s/localhost/ここにDBサーバーのプライベートIPアドレスを書く/g config/database.yml

[root@localhost bbs]# rake db:create
[root@localhost bbs]# rake db:migrate
[root@localhost bbs]# rails server -p 80