{{parent page="Monitoring"}}

===Installing nagios NMS===
%%
$ ./configure --with-command-group=nagcmd --prefix=/opt/nagios \
--with-cgiurl=/nagios/cgi-bin --with-htmurl=/nagios \
--with-nagios-user=nagios --with-nagios-group=nagios 

*** Configuration summary for nagios 3.2.1 03-09-2010 ***:

 General Options:
 -------------------------
		Nagios executable:  nagios
		Nagios user/group:  nagios,nagios
	   Command user/group:  nagios,nagcmd
			Embedded Perl:  no
			 Event Broker:  yes
		Install ${prefix}:  /opt/nagios
				Lock file:  ${prefix}/var/nagios.lock
   Check result directory:  ${prefix}/var/spool/checkresults
		   Init directory:  /etc/rc.d/init.d
  Apache conf.d directory:  /etc/httpd/conf.d
			 Mail program:  /bin/mail
				  Host OS:  linux-gnu

 Web Interface Options:
 ------------------------
				 HTML URL:  http://localhost/nagios/
				  CGI URL:  http://localhost/nagios/cgi-bin/
 Traceroute (used by WAP):  /bin/traceroute

$ make all
$ make install
$ make install-config
$ make install-commandmode
$ make install-webconf
$ htpasswd -c /usr/local/nagios/etc/htpasswd.users admin
%%

===Compile and install nagios plugins===
%%
$ tar xvf nagios-plugins-1.4.11.tar.gz
$ cd nagios-plugins-1.4.11
$ ./configure --with-nagios-user=nagios --with-nagios-group=nagios --enable-redhat-pthread-workaround
$ make
$ make install
$ chkconfig --add nagios
$ chkconfig nagios on
$ /opt/nagios/bin/nagios -v /opt/nagios/etc/nagios.cfg 
	  Total Warnings: 0
	  Total Errors:   0
	  Things look okay - No serious problems were detected during the pre-flight check
$ /opt/nagios/bin/nagios -d /opt/nagios/etc/nagios.cfg 

curl http://localhost/nagios
%%


===Monitoring node (NRPE)===
Install nagios plugin first, then install nrpe

%%
$ chown nagios.nagios /usr/local/nagios
$ chown -R nagios.nagios /usr/local/nagios/libexec/

[remotehost]# ./configure
*** Configuration summary for nrpe 2.12 03-10-2008 ***:

 General Options:
 -------------------------
 NRPE port:    5666
 NRPE user:    nagios
 NRPE group:   nagios
 Nagios user:  nagios
 Nagios group: nagios

[remotehost]# make all
[remotehost]# make install-plugin
[remotehost]# make install-daemon
[remotehost]# make install-daemon-config
[remotehost]# make install-xinetd


edit /etc/xinetd.d/nrpe and add NMS to the list, then 
echo "nrpe 5666/tcp # NRPE" >> /etc/services
$ /usr/local/nagios/libexec/check_nrpe -H localhost
NRPE v2.12

service xinetd restart ; netstat -atunp | grep 5666
%%

===Back to the NMS===
%%
[nagios-server]# tar xvfz nrpe-2.12.tar.gz
[nagios-server]# cd nrpe-2.1.2
[nagios-server]# ./configure
[nagios-server]# make all
[nagios-server]# make install-plugin

./configure will give a configuration summary as shown below:

*** Configuration summary for nrpe 2.12 05-31-2008 ***:

General Options:
————————-
NRPE port: 5666
NRPE user: nagios
NRPE group: nagios
Nagios user: nagios
Nagios group: nagios

$ /usr/local/nagios/libexec/check_nrpe -H <remotehost>
NRPE v2.12
%%


Now create a remotehost.cfg under /opt/nagios/etc/objects
%%
define host {
use linux-server
host_name vlinux02.hkg
alias vlinux02.hkg
address 202.168.210.21
contact_groups admins
}

define service {
use generic-service
service_description Root Partition
contact_groups admins
check_command check_nrpe!check_disk
}
%%

restart nagiosd (kill -9 and start up again) and go to the web interface

--> At this point I'm getting plugin not exist errors in /opt/nagios/var/nagios.log....