MySQLをインストール

次はMySQLをインストールしてみたいと思います。
今回は久々にyumでインストールします。
まずは、以下のコマンドでMySQL Serverをインストールします。

# yum -y install mysql-server

次に、MySQLのConfファイルの修正。[mysqld]の中に、以下を追加。

# vi /etc/my.cnf
character-set-server = utf8

MySQLが起動できるか確認する。

# service mysqld start
MySQL データベースを初期化中:  Installing MySQL system tables...
OK
Filling help tables...
OK

To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system

PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:

/usr/bin/mysqladmin -u root password 'new-password'
/usr/bin/mysqladmin -u root -h localhost.localdomain password 'new-password'

Alternatively you can run:
/usr/bin/mysql_secure_installation

which will also give you the option of removing the test
databases and anonymous user created by default.  This is
strongly recommended for production servers.

See the manual for more instructions.

You can start the MySQL daemon with:
cd /usr ; /usr/bin/mysqld_safe &

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  ]
mysqld を起動中:                                           [  OK  ]
character-set-server = utf8

起動が確認できたら、自動起動するように設定する。

# chkconfig mysqld on

MySQLの初期設定を行います。

# 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.

Set root password? [Y/n]　←空エンター
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.

Remove anonymous users? [Y/n]　←空エンター
 ... 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]　←空エンター
 ... 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.

Remove test database and access to it? [Y/n]　←空エンター
 - 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]　←空エンター
 ... 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がしっかり動くかの確認は、以下の参考ページを参考に。

http://centossrv.com/mysql.shtml

Tomcatをインストールする

ApacheもJava(JRE)もインストールできたということで、Tomcatをインストールしてみたいと思います。

まず、rootでTomcatを動かすとセキュリティ的にまずいので、Tomcat実行専用ユーザーを作ります。
ログインシェルに/sbin/nologinを指定して通常利用はできないようにしておきます。

# useradd -s /sbin/nologin tomcat

そしていつも通り、Tomcat公式ページから最新版のTomcatのダウンロードURLをゲットしてwgetでダウンロードし、解凍します。

# wget http://ftp.tsukuba.wide.ad.jp/software/apache/tomcat/tomcat-7/v7.0.47/bin/apache-tomcat-7.0.47.tar.gz
# tar zxvf apache-tomcat-7.0.47.tar.gz

解凍したTomcatを、アプリ用ディレクトリへ名前を変えて移動します。

# mv apache-tomcat-7.0.47 /usr/local/tomcat-7.0.47

次に、TomcatのWeb管理コンソールにアクセスする為のユーザーを作成する（CentOSには関係の無い、Tomcat用のユーザー）。

# vi /usr/local/tomcat-7.0.47/conf/tomcat-users.xml

※usernameとpasswordを、任意の物に変更する

最後に、Tomcat自動起動スクリプトを設置し、OS起動時にTomcatも自動起動するようにする。

# vi /etc/init.d/tomcat

#!/bin/bash
#
# Startup script for the Tomcat Servlet Container
#
# chkconfig: 2345 35 65
# description: Tomcat is the servlet container that is used in the official \
#              Reference Implementation for the Java Servlet and JavaServer \
#              Pages technologies

TOMCAT_USER=tomcat
CATALINA_HOME=/usr/local/tomcat-7.0.47

. /etc/rc.d/init.d/functions
prog=tomcat

start() {
    echo -n $"Starting $prog: "
    daemon --user $TOMCAT_USER $CATALINA_HOME/bin/startup.sh > /dev/null
    RETVAL=$?
    if [ $RETVAL -eq 0 ]; then
        echo_success
    else
        echo_failure
    fi
    echo
    [ $RETVAL = 0 ] && touch /var/lock/subsys/$prog
    return $RETVAL
}
stop() {
    echo -n $"Stopping $prog: "
    daemon --user $TOMCAT_USER $CATALINA_HOME/bin/shutdown.sh > /dev/null
    RETVAL=$?
    if [ $RETVAL -eq 0 ]; then
        echo_success
    else
        echo_failure
    fi
    echo
    [ $RETVAL = 0 ] && rm -f /var/lock/subsys/$prog
    return $RETVAL
}

# See how we were called.
case "$1" in
  start)
    start
    ;;
  stop)
    stop
    ;;
  restart)
    stop
    start
    ;;
  status)
    INSTANCES=`ps --columns 512 -aef|grep java|grep tomcat|grep org.apache.catalina.startup.Bootstrap|wc -l`
    if [ $INSTANCES -eq 0 ]; then
        echo $prog is stopped
        RETVAL=3
    else
        if [ $INSTANCES -eq 1 ]; then
            echo $prog is running 1 instance...
        else
            echo $prog is running $INSTANCES instances...
        fi
        RETVAL=0
    fi
    ;;
  *)
    echo $"Usage: $prog {start|stop|restart|status|help}"
    exit 1
esac

exit $RETVAL

設置したTomcat自動起動スクリプトに実行権限を与えます。

# chmod +x  /etc/init.d/tomcat

あとは自動起動の設定！

# /sbin/chkconfig --add tomcat

http://IPアドレス:8080にアクセスしてTomcatトップページが表示されるか確認するのみ。