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安裝nagios伺服器端
# groupadd nagios
# groupadd nagcmd
# useradd -g nagios -s /sbin/nologin -d /usr/local/nagios nagios
# usermod -G nagcmd nagios
# usermod -G nagcmd www
# chmod 755 /usr/local/nagios
# yum -y install gcc gcc-c++ flex bison autoconf automake bzip2 bzip2-devel zlib zlib-devel
# yum -y install ncurses ncurses-devel libjpeg libjpeg-devel libpng libpng-devel libtiff libtiff-devel
# yum -y install freetype freetype-devel pam pam-devel gd gd-devel libgdata libgdata-devel cairo cairo-devel
# yum -y install libxml2 libxml2-devel pango pango-devel libart_lgpl libart_lgpl-devel
注：httpd php 安裝略，httpd在configure時，加上參數--enable-cgi和--enable-cgid
# wget -c http://sourceforge.net/projects/nagios-cn/files/latest/download?source=files [中文版]
# tar -jxvf nagios-cn-3.2.3.tar.bz2
# cd nagios-cn-3.2.3
or
# wget -c http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-3.3.1.tar.gz [英文版]
# tar -xvzf nagios-3.3.1.tar.gz
# cd nagios
# ./configure --prefix=/usr/local/nagios \
--with-nagios-user=nagios \
--with-nagiso-group=nagios \
--with-httpd-conf=/usr/local/apache/conf \
--with-command-group=nagcmd
# make all
# make install
# make install-init
# make install-commandmode
# make install-config
# make install-webconf
# /usr/local/apache/bin/htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin [密碼: blzvdwl369328]
# vi /usr/local/apache/conf/extra/httpd-vhosts.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
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# wget -c http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.15.tar.gz
# tar -xvzf nagios-plugins-1.4.15.tar.gz
# cd nagios-plugins-1.4.15
--with-nagios-group=nagios \
--with-mysql=/usr/local/mysql \
--enable-perl-modules
# wget -c http://nchc.dl.sourceforge.net/project/nagios/nrpe-2.x/nrpe-2.13/nrpe-2.13.tar.gz
# tar -xvzf nrpe-2.13.tar.gz
# cd nrpe-2.13
# ./configure
# make install-plugin
# yum -y install rrdtool
# yum -y install rrdtool-perl
# wget -c http://nchc.dl.sourceforge.net/project/pnp4nagios/PNP-0.6/pnp4nagios-0.6.16.tar.gz
# tar -xvzf pnp4nagios-0.6.16.tar.gz
# cd pnp4nagios-0.6.16
# ./configure --prefix=/usr/local/pnp4nagios \
--with-httpd-conf=/usr/local/apache/conf
Alias /pnp4nagios "/usr/local/pnp4nagios/share"
<Directory "/usr/local/pnp4nagios/share">
AllowOverride None
Order allow,deny
Allow from all
AuthName "Nagios Access"
AuthType Basic
AuthUserFile /usr/local/nagios/etc/htpasswd.users
Require valid-user
<IfModule mod_rewrite.c>
RewriteEngine On
Options FollowSymLinks
RewriteBase /pnp4nagios/
RewriteRule ^(application|modules|system) - [F,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* index.php/$0 [PT,L]
</IfModule>
# cd /usr/local/pnp4nagios/etc
# mv misccommands.cfg-sample misccommands.cfg
# mv nagios.cfg-sample nagios.cfg
# mv rra.cfg-sample rra.cfg
# cd pages
# mv web_traffic.cfg-sample web_traffic.cfg
# cd ../check_commands
# mv check_all_local_disks.cfg-sample check_all_local_disks.cfg
# mv check_nrpe.cfg-sample check_nrpe.cfg
# mv check_nwstat.cfg-sample check_nwstat.cfg
# vi /usr/local/nagios/etc/nagios.cfg
process_performance_data=1
host_perfdata_command=process-host-perfdata
service_perfdata_command=process-service-perfdata
# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg [配置檢查]
# vi /usr/local/nagios/etc/objects/commands.cfg
define command{
command_name process-host-perfdata
command_line /usr/bin/perl /usr/local/pnp4nagios/libexec/process_perfdata.pl -d HOSTPERFDATA
}
command_name process-service-perfdata
command_line /usr/bin/perl /usr/local/pnp4nagios/libexec/process_perfdata.pl
# vi /usr/local/nagios/etc/objects/templates.cfg
define host{
name host-pnp
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=_HOST_
register 0
define service{
name srv-pnp
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=$SERVICEDESC$
# vi /usr/local/nagios/etc/objects/localhost.cfg
use linux-server,host-pnp
host_name HomeSwitch
alias HomeSwitch
address 127.0.0.1
icon_p_w_picpath switch.gif
statusmap_p_w_picpath switch.gd2
2d_coords 100,200
3d_coords 100,200,100
}
use local-service,srv-pnp
host_name localhost
service_description PING
check_command check_ping!100.0,20%!500.0,60%
# cd /usr/local/pnp4nagios/share
# mv install.php install.php.bak
# wget -c http://sourceforge.net/projects/nagiosql/files/nagiosql/NagiosQL%203.1.1/nagiosql_311.tar.gz
被監控端安裝
# useradd -g nagios -s /sbin/nologin nagios
# wget -c http://sourceforge.net/projects/nagiosplug/files/nagiosplug/1.4.9/nagios-plugins-1.4.9.tar.gz
# tar -xvzf nagios-plugins-1.4.9.tar.gz
# cd nagios-plugins-1.4.9
# ./configure --prefix=/usr/local/nagios
# make
# chown nagios.nagios /usr/local/nagios
# chown -R nagios.nagios /usr/local/nagios/libexec
# make install-daemon
# make install-daemon-config
# /usr/local/nagios/libexec/check_nrpe -H localhost
# vi /usr/local/nagios/etc/nrpe.cfg
allowed_hosts=127.0.0.1 [注：為Nagios監控平台的位址或域名]
# /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
# echo "/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d" >> /etc/rc.local
# iptables -A INPUT -m state --state NEW -p tcp --dport 5666 -j ACCEPT
此指令生成的日志會在系統的日志（/var/log/message）中
# /usr/local/nagios/libexec/check_nrpe -H 127.0.0.1 [注：在本機]
# /usr/local/nagios/libexec/check_nrpe -H 目标主機位址 [注：在nagios監控平台伺服器]
通過NRPE，可以監控到被監控伺服器上有的插件(/usr/local/nagios/libexec中的所有插件)。也就是說，
你想監控什麼，隻要有對應的插件，就可以實作。例如，我希望監控一台遠端伺服器上的cpu負載。
在遠端主機的插件中有“check_load”，那麼，在nrpe.conf中定義一個cpu負載的監控：
command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
被監控機：[以監控記憶體使用為例]
http://exchange.nagios.org/components/com_mtree/p_w_upload.php?link_id=1154&cf_id=24
command[check_mem]=/usr/local/nagios/libexec/check_mem -w 110,50 -c 150,80
# chmod 755 /usr/local/nagios/libexec/check_mem
# chown nagios.nagios /usr/local/nagios/libexec/check_mem
監控機：
command_name check_mem
command_line $USER1$/check_mem -w $ARG1$ -c $ARG2$
cfg_file=/usr/local/nagios/etc/objects/linuxserver.cfg
# vi /usr/local/nagios/etc/objects/linuxserver.cfg
use linux-server,host-pnp
host_name weiliao_server78
alias weiliao_server78
contact_groups admins
max_check_attempts 5
address 192.168.1.238
icon_p_w_picpath server.gif
statusmap_p_w_picpath server.gd2
2d_coords 100,200
3d_coords 100,200,100
define hostgroup{
hostgroup_name linux-server
alias Linux Servers
members weiliao_server78
host_name weiliao_server78
service_description memory_monitor
is_volatile 0
check_period 24x7
normal_check_interval 1
retry_check_interval 1
notification_options w,u,c,r
notification_interval 1
notification_period 24x7
check_command check_nrpe!check_mem!110,50!150,80
notifications_enabled 0