Nagios: howto become a happy network and system monitoring engineer

Nagios: howto become a happy network and system monitoring engineer

Nagios: howto become a happy network and system monitoring engineer 150 150 Roderick Derks


Installing Nagios on FC6

I decided to go for the 3.0a1 beta version which I had to compile first. I used the Nagios install manual on the web. I created my own install manual ’cause I had to get some packages I’d never heard of. So that I will not forget.

The OS I used is a minimun install Fedora Core 6 (FC6). After doing the install of FC6 I added yum and some other packages like dclient.

Packages I had installed before I started and are needed by Nagios or their plugins: perl, gcc, make, sendmail, mailx, curl, ntp.

Install the webserver
# yum -y install httpd

Download nagios files
# wget
# wget

Install needed packages fot snmp
# yum -y install net-snmp net-snmp-perl net-snmp-utils perl-Net-SNMP net-snmp-libs

Install needed packeges to create a status map in Nagios
# yum install gd gd-devel libpng libpng-devel libjpg libjpg-devel

Prepeare for installing Nagios
# useradd nagios
# passwd nagios
# groupadd nagcmd
# usermod -G nagcmd nagios
# usermod -G nagcmd apache

Install Nagios
# tar xvzf nagios-3.0a1.tar.gz
# cd nagios-3.0a1

If you did a prevoius install of the same version and the source files are still there
# make devclean

# ./configure –with-gd-lib=/usr/lib –with-gd-inc=/usr/include –with-command-group=nagcmd
# make all
# make install
# make install-init
# make install-config
# make install-commandmode

Change the email address of the nagios user to your own in the example file
# vi /usr/local/nagios/etc/localhost.cfg

Set the rights
# cp sample-config/httpd.conf /etc/httpd/conf.d/nagios.conf
# htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

Add an extra user: loose the -c option, because this creates a new config file
# htpasswd /usr/local/nagios/etc/htpasswd.users roderick

If you added an extra user, adjust the rights in the cgi.cfg file
# vi /usr/local/nagios/etc/cgi.cfg

Install the Nagios plugins

# tar xzf nagios-plugins-1.4.6.tar.gz
# cd nagios-plugins-1.4.6
# ./configure
# make
# make install
# chown nagios /usr/local/nagios/libexec/*
# chown root.nagios /usr/local/nagios/libexec/check_dhcp
# chown root.nagios /usr/local/nagios/libexec/check_icmp
# chmod 4550 /usr/local/nagios/libexec/check_dhcp
# chmod 4550 /usr/local/nagios/libexec/check_icmp
# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
# service nagios start
# service httpd start
# chkconfig –level 3 httpd on
# chkconfig –level 3 nagios on

Let’s role!


Roderick Derks

Liefhebber van fietsen, van het oplossen van IT puzzels, en van het delen van informatie om anderen te helpen.

All stories by:Roderick Derks

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