== Nagios + Nrpe

tar xzf nagios-version.tar.gz 
adduser nagios 
mkdir /usr/local/nagios 
chown nagios.nagios /usr/local/nagios 
/usr/sbin/groupadd nagcmd
/usr/sbin/usermod -G nagcmd apache
/usr/sbin/usermod -G nagcmd nagios

./configure --prefix=/usr/local/nagios --with-cgiurl=/nagios/cgi-bin --with-htmurl=/nagios/ --with-nagios-user=nagios --with-nagios-group=nagios --with-command-group=nagcmd

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

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

<Directory "/usr/local/nagios/sbin">
    Options ExecCGI
    AllowOverride None
    Order allow,deny
    Allow from all
    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">
    Options None
    AllowOverride None
    Order allow,deny
    Allow from all
    AuthName "Nagios Access"
    AuthType Basic
    AuthUserFile /usr/local/nagios/etc/htpasswd.users
    Require valid-user
</Directory>

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

cd nagios-plugins-1.4.13
./configure
make
make check
make install

tar zxvf nrpe-2.12.tar.gz
cd nrpe-2.12
./configure && make check_nrpe && make install-plugin

tar zxvf nagios-plugins-1.4.11.tar.gz
cd nagios-plugins-1.4.11
./configure && make && make install

vi /usr/local/nagios/etc/objects/commands.cfg
# 'check_nrpe' command definition
define command{
        command_name    check_nrpe
        command_line    $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
        }


監視対象

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

tar zxvf nrpe-2.12.tar.gz
cd nrpe-2.12
./configure && make nrpe && make install-daemon && make install-daemon-config && make install-xinetd

echo "nrpe 5666/tcp # NRPE" >> /etc/services

vi /etc/xinetd.d/nrpe
　　　　　only_from	     = 192.168.2.240 #<--Nagios's IP
     only_from       = 127.0.0.1


vi /usr/local/nagios/etc/nrpe.cfg
command[check_http]=/usr/local/nagios/libexec/check_http -H 127.0.0.1

/etc/rc.d/init.d/xinetd restart


Ｎａｇｉｏｓサーバー

/usr/local/nagios/etc/servers/lvsc2.cfg

define host{
        use                     linux-server
        host_name               lvsc3
        alias                   lvsc3
        address                 192.168.2.238
        }

define service{
        use                             generic-service
        host_name                       lvsc3
        service_description             PING
        check_command                   check_ping!100.0,20%!500.0,60%
        }

define service{
        use                             generic-service
        host_name                       lvsc3
        service_description             HTTP
        check_command                   check_nrpe!check_http
        }



イベントハンドラの設定

vi /usr/local/nagios/etc/objects/localhost.cfg

define service{
        use                             generic-service
        host_name                       lvsc2
        service_description             HTTP
        max_check_attempts              4
        normal_check_interval           1
        check_command                   check_nrpe!check_http
        event_handler                   restart-httpd
        }

vi /usr/local/nagios/etc/objects/commands.cfg

define command{
        command_name    restart-httpd
        command_line    /usr/local/nagios/libexec/eventhandlers/restart-httpd $SERVICESTATE$ $STAT
ETYPE$ $SERVICEATTEMPT$
        }

vi /usr/local/nagios/libexec/eventhandlers/restart-httpd

case "$1" in
OK)
        ;;
WARNING)
        ;;
UNKNOWN)
        ;;
CRITICAL)
        case "$2" in
        SOFT)
                case "$3" in
                3)
                        /usr/bin/sudo /etc/rc.d/init.d/httpd restart
                        ;;
                        esac
                ;;

        HARD)
                /usr/bin/sudo /etc/rc.d/init.d/httpd restart
                ;;
        esac
        ;;
esac
exit 0


Event Handlerを使ってsudoのエラーが出る場合は以下をコメントアウト

vi /etc/sudoers
#Defaults    requiretty