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
