Install NagiosGraph

First of all, this is running on Ubuntu 10.04.1 LTS x32. I installed Nagios 3.2.0 from the source packages (see another post on this site), and will be installing NagiosGraph 1.4.3. I’ve also installed Nagios-Plugins-1.4.15.

This will probably be a lot of writing, but in the end it was definitely worth my time.

Update System and Install SNMPD:

su root
apt-get install update
apt-get install upgrade
apt-get install snmpd
mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.org
nano /etc/snmp/snmpd.conf
rocommunity public
syslocation “MyLocation”
syscontact email@domain.tld
Save and close
nano /etc/default/snmpd
Change From:
# snmpd options (use syslog, close stdin/out/err).
SNMPDOPTS=’-Lsd -Lf /dev/null -u snmp -I -smux -p /var/run/snmpd.pid 127.0.0.1′
To:
# snmpd options (use syslog, close stdin/out/err).
#SNMPDOPTS=’-Lsd -Lf /dev/null -u snmp -I -smux -p /var/run/snmpd.pid 127.0.0.1′
SNMPDOPTS=’-Lsd -Lf /dev/null -u snmp -I -smux -p /var/run/snmpd.pid -c /etc/snmp/snmpd.conf’
Save and close
/etc/init.d/snmpd restart

Test SNMPD:

snmpwalk -v 1 -c public -O e IP_OF_YOUR_MACHINE
You can use Localhost (127.0.0.1) in lieu of another IP address

Download Required Files:

cd /home/nagios
wget http://voxel.dl.sourceforge.net/project/nagiosgraph/nagiosgraph/1.4.3/nagiosgraph-1.4.3.tar.gz
apt-get install rrdtool perl libcgi-pm-perl librrds-perl libgd-gd2-perl

Extract Required Files:

tar xzvf nagiosgraph-1.4.3.tar.gz
cd nagiosgraph-1.4.3

Copy Files:

mkdir /etc/nagiosgraph
cp etc/* /etc/nagiosgraph

Edit Perl Scripts With FilePath:

nano cgi/*.cgi lib/insert.pl
Find “use lib” line (definitely on the first page of text) and edit it to be /etc/nagiosgraph
Save all files

Continue Copying Files:

cp lib/insert.pl /usr/local/nagios/libexec
cp cgi/*.cgi /usr/local/nagios/sbin
cp share/nagiosgraph.css /usr/local/nagios/share
cp share/nagiosgraph.js /usr/local/nagios/share

Edit The Nagiosgraph.conf File:

nano /etc/nagiosgraph/nagiosgraph.conf
Set the following:
perflog = /var/nagios/perfdata.log
rrddir = /var/nagios/rrd
mapfile = /etc/nagiosgraph/map
nagiosgraphcgiurl = /nagios/cgi-bin
javascript = /nagios/nagiosgraph.js
stylesheet = /nagios/nagiosgraph.css
logfile = /var/log/nagiosgraph.log
cgilogfile = /var/log/nagiosgraph-cgi.log

Set Permissions For RRD Directory, Log Files, CGI Files:

mkdir /var/nagios/rrd
chown 777 /var/nagios
chown nagios /var/nagios/rrd
chmod 755 /var/nagios/rrd
touch /var/log/nagiosgraph.log
chown nagios /var/log/nagiosgraph.log
chmod 664 /var/log/nagiosgraph.log
touch /var/log/nagiosgraph-cgi.log
chown www-data /var/log/nagiosgraph-cgi.log
chmod 664 /var/log/nagiosgraph-cgi.log

Edit Nagios.cfg:

nano /usr/local/nagios/etc/nagios.cfg
process_performance_data=1
service_perfdata_file=/var/nagios/perfdata.log
service_perfdata_file_template=$LASTSERVICECHECK$||$HOSTNAME$||$SERVICEDESC$||$SERVICEOUTPUT$||$SERVICEPERFDATA$
service_perfdata_file_mode=a
service_perfdata_file_processing_interval=30
service_perfdata_file_processing_command=process-service-perfdata

Edit Commands.cfg (make sure this is enabled/correct):

nano /usr/local/nagios/etc/objects/commands.cfg
define command {
command_name process-service-perfdata
command_line /usr/local/nagios/libexec/insert.pl
}

Restart Nagios:

/etc/init.d/nagios restart

Edit Apache Configuration:

This was already done for me from the Nagios install, but just verify it’s correct.
nano /etc/apache2/conf.d/nagios.conf
ScriptAlias /nagios/cgi-bin /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
AuthName “Nagios Access”
AuthType Basic
AuthUserFile /usr/local/nagios/etc/htpasswd.users
Require valid-user

There should be more below this, so just leave that alone.

Restart Apache:

apache2ctl restart

Test Your Site:

http://server/nagios/cgi-bin/show.cgi

You shouldn’t get any errors. If you get a 500 internal error, the issue is with Apache. If you get a “no rrd data found” error, then the configuration of nagiosgraph is incorrect OR you haven’t waited long enough.

You can try to run the script directly:

cd /usr/local/nagios/libexec
./insert.pl

Then verify that there is some data in the RRD directory:
ls /var/nagios/rrd/

To get it to work with Windows Clients:

Edit the map file:
nano /etc/nagiosgraph/map
Add the following to the END of the file:
# Service type: memory
# check command: check_nt -H Address -v MEMUSE -w 50 -c 90
#output: Memory usage: tootal:2467.75 Mb – used: 510.38 Mb (21%) – free: 1957.37 Mb (79%)
/perfdata:Memory usage=([.0-9])+Mb;([.0-9+);([.0-9+);([.0-9+);([.0-9]+)/
and push @s, [ntmem,
[memused, GAUGE, $1*1024**2 ]
];
# Service type: ntload
# Check command: check_nt -H Address -v CPULOAD -l1,70,90,5,70,90,30,70,90
# output: CPU Load 9% (5 min average) 11% (30 min average)
#perfdata: ‘5 min avg Load’=9%;70;80;0;100 ’30 min avg Load’=11%;70;90;0;100
/output:.*?(\d+)% .*?(\d+)% /
and push @s, [ ntload,
[ avg05min, GAUGE, $1 ],
[avg30min, GAUGE, $2 ] ];
# Service type: ntdisk
# check command: check_nt -H Address -v USEDDISKSPACE -lc -w 75 -c 90
# output: c:\ – total: 25.87 Gb – used: 4.10 Gb (16%) – free 21.77 Gb (84%)
# perfdata: c:\ Used Space=4.10Gb;19.40;23.28;0.00;25.87
/perfdata:.*Space=([.0-9]+)Gb;([.0-9]+);([.0-9]+);([.0-9]+);([.0-9]+)/
and push @s, [ ntdisk,
[ diskused, GAUGE, $1*1024**3 ],
[ diskwarn, GAUGE, $2*1024**3 ],
[ diskcrit, GAUGE, $3*1024**3 ],
[ diskmaxi, GAUGE, $5*1024**3 ] ];

Save and close the file, then restart nagios (/etc/init.d/nagios restart)

***EDIT***
Updated – had “.conf” instead of “.cfg” under “edit nagios.cfg”
Added chmod 777 for /var/nagios to allow perfdata.log to be written

I was trying to add an HP printer to the mix and the printer is trying to utilize the service “check_hpjd”. Unfortunately, on my Ubuntu installation, the plugin was not installed in /usr/local/nagios/libexec.

A short amount of research showed that I had failed to install the required SNMP tools to utilize this plugin. And, because I actually installed Nagios and the plugins from the source rather than binaries, the configuration and make checked to see if the required tools would be available before actually installing them.

Long story short, here’s what I ended up doing (apt-get install net-snmp does not work):
apt-get install libsnmp-base libsnmp-python libsnmp15-dbg libsnmp-dev libsnmp-perl libsnmp15 snmp snmpd tkmib

Edit the SNMPD configuration:
mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.org
nano /etc/snmp/snmpd.conf

rocommunity public
syslocation “USA”
syscontact myemail@domain.tld
Save and Close

Edit the SNMPD Daemon:
nano /etc/default/snmpd

Change “SNMPDOPTS=’-Lsd -Lf /dev/null -u snmp -I -smux -p /var/run/snmpd.pid 127.0.0.1′”
To “SNMPDOPTS=’-Lsd -Lf /dev/null -u snmp -I -smux -p /var/run/snmpd.pid -c /etc/snmp/snmpd.conf'”

Restart the SNMPD service:
/etc/init.d/snmpd restart

Test the SNMP:
snmpwalk -v 1 -c public -O e host/IPaddress
You should get some sort of feedback