Centos5.4にNagios3.2をインストール

Nagiosインストール

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yum -y install gd-devel

useradd -d /usr/local/nagios/ -M nagios

cd /usr/local/src
wget http://jaist.dl.sourceforge.net/sourceforge/nagios/nagios-3.2.0.tar.gz
tar zxvf nagios-3.2.0.tar.gz
cd nagios-3.2.0
wget http://ftp.momo-i.org/pub/other/nagios-jp-3.2.0.patch.gz

gzip -d nagios-jp-3.2.0.patch.gz

patch -p1 < nagios-jp-3.2.0.patch

./configure

make all

make install
make install-init
make install-commandmode
make install-config

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さざなみフォントインストール

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wget http://osdn.dl.sourceforge.jp/efont/10087/sazanami-20040629.tar.bz2

tar jxvf sazanami-20040629.tar.bz2
mkdir /usr/local/nagios/etc/font

cp sazanami-20040629/sazanami-gothic.ttf /usr/local/nagios/etc/font/font.ttf

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Nagiosプラグインインストール

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yum –enablerepo=remi,epel,rpmforge install mysql-devel

wget http://jaist.dl.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.14.tar.gz

tar zxvf nagios-plugins-1.4.14.tar.gz

cd nagios-plugins-1.4.14

./configure && make && make install
cp contrib/check_mem.pl /usr/local/nagios/libexec/

設定の編集
vi /usr/local/nagios/libexec/check_mem.pl

$command_line = `vmstat | tail -1 | awk ‘{print \$4,\$5}’`;
↓
$command_line = `free | head -3 | tail -1 | awk ‘{print \$3,\$4}’`;

chmod +x /usr/local/nagios/libexec/check_mem.pl

 

Nagios設定

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vi /usr/local/nagios/etc/nagios.cfg
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cfg_dir=/usr/local/nagios/etc/servers　←　行頭の#を削除してコメント解除(サーバー監視設定有効化)

date_format=iso8601　←　日付書式をYYYY-MM-DD HH:MM:SSにする

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vi /usr/local/nagios/etc/cgi.cfg

ttf_file=/usr/local/nagios/etc/font/font.ttf

mkdir /usr/local/nagios/etc/servers

vi /usr/local/nagios/etc/objects/contacts.cfg
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define contact{
contact_name nagiosadmin ; Short name of user
use generic-contact ; Inherit default values from generic-contact template (defined above)
alias Nagios Admin ; Full name of user

email 管理者メールアドレス　←　管理者メールアドレスを指定
}

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vi /usr/local/nagios/etc/objects/localhost.cfg
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define service{
use local-service ; Name of service template to use
host_name localhost
service_description SSH
check_command check_ssh
notifications_enabled 1　←　1を指定(SSH状態変化時に通知する)
}

define service{
use local-service ; Name of service template to use
host_name localhost
service_description HTTP
check_command check_http
notifications_enabled 1　←　1を指定(HTTP状態変化時に通知する)
}

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vi /usr/local/nagios/etc/objects/commands.cfg　←　commands.cfg編集
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# ‘notify-host-by-email’ command definition
define command{
command_name    notify-host-by-email
# nkfコマンド追加(メール本文文字化け対処)
command_line    /usr/bin/printf “%b” “***** Nagios *****nnNotification Type: $NOTIFICATIONTYPE$nHost: $HOSTNAME$nState: $HOSTSTATE$nAddress: $HOSTADDRESS$nInfo: $HOSTOUTPUT$nnDate/Time: $LONGDATETIME$n” | /usr/bin/nkf -j | /bin/mail -s “** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **” $CONTACTEMAIL$
}

# ‘notify-service-by-email’ command definition
define command{
command_name    notify-service-by-email
# nkfコマンド追加(メール本文文字化け対処)
command_line    /usr/bin/printf “%b” “***** Nagios *****nnNotification Type: $NOTIFICATIONTYPE$nnService: $SERVICEDESC$nHost: $HOSTALIAS$nAddress: $HOSTADDRESS$nState: $SERVICESTATE$nnDate/Time: $LONGDATETIME$nnAdditional Info:nn$SERVICEOUTPUT$” | /usr/bin/nkf -j | /bin/mail -s “** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **” $CONTACTEMAIL$
}

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Apache設定

usermod -G nagios apache

vi /etc/httpd/conf.d/nagios.conf
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ScriptAlias /nagios/cgi-bin “/usr/local/nagios/sbin”

<Directory “/usr/local/nagios/sbin”>
#  SSLRequireSSL
Options ExecCGI
AllowOverride None
Order allow,deny
#  Allow from all
#  Order deny,allow
#  Deny from all
Allow from 127.0.0.1
Allow from 192.168.24.0/24
AuthName “Nagios Access”
AuthType Basic
AuthUserFile /usr/local/nagios/etc/htpasswd.users
Require valid-user
</Directory>

Alias /nagios “/usr/local/nagios/share”

<Directory “/usr/local/nagios/share”>
#  SSLRequireSSL
Options None
AllowOverride None
Order allow,deny
#  Allow from all
#  Order deny,allow
#  Deny from all
Allow from 127.0.0.1
Allow from 192.168.24.0/24
AuthName “Nagios Access”
AuthType Basic
AuthUserFile /usr/local/nagios/etc/htpasswd.users
Require valid-user
</Directory>

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/etc/rc.d/init.d/httpd reload

htpasswd -c /usr/local/nagios/etc/htpasswd.users admin

Nagios起動

/etc/rc.d/init.d/nagios start

/sbin/chkconfig –add nagios
/sbin/chkconfig nagios on

Nagios確認