nagios conference 2012 - dave williams - embedding nagios using raspberypi

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26th September 2012 Dave Williams

Lead Technical Architect

Embedding Nagios in the Raspberry Pi

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Agenda

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Agenda

BackgroundThe Raspberry PiThe Raspberry Pi Nagios RecipeUsing DNX on the Raspberry PiDemonstrationFutures & ‘Blue Sky thinking’Conclusion

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Background

UK basedMainframe (IBM & Honeywell)Unix (HP-UX, AIX, Solaris)Network (CASE, 3COM, CISCO)

Working for BullFrench Computer ManufacturerMainframes, Unix, HPC, Security, Managed Services

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Background

System MonitoringOpenViewNetviewOpen Master

Open Source MonitoringNetSaint on AIXNagios

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The Raspberry Pi

Eben Upton and his colleagues at the University of Cambridge’s Computer Laboratory, became concerned about the year-on-year decline in the numbers and skills levels of the A Level students applying to read Computer Science in each academic yearThe Raspberry Pi is a credit-card sized computer that plugs into your TV and a keyboard. It’s a capable little PC which can be used for many of the things that your desktop PC does, like spreadsheets, word-processing and games. It also plays high-definition video.

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The Raspberry Pi

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The Raspberry Pi

Raspberry Pi’s are nearly everywhere

http://rastrack.co.uk

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The Raspberry Pi

The demo / sample system is running Debian – Squeeze

Soon to be updated to Wheezy

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The Raspberry Pi Nagios Recipe

See http://exchange.nagios.org/directory/Documentation/Nagios-Core-Documentation/Nagios-and-Raspberry-PI/details

Yes it’s already in the Nagios Core documentation set !

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The Raspberry Pi Nagios Recipe

#apt-get update #apt-get install php5 apache2 libgd2-xpm libgd2-xpm-dev

libgd2-dev libpng12-dev libjpeg62-dev libgd-tools libpng12-dev libgd2-xpm libgd2-xpm-dev libssl-dev gnutls-bin iputils

#groupadd www-data#groupadd nagios #adduser nagios#usermod -G nagios nagios#usermod -G www-data,nagios www-data #mkdir /usr/local/nagios#chown -R nagios:nagios /usr/local/Nagios

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The Raspberry Pi Nagios Recipe

Whoops ! We also need GD-Utils….

root@raspberrypi:/tmp# wget http://www.boutell.com/gd/http/gd-2.0.33.tar.gz

root@raspberrypi:/tmp# tar -zxvf gd-2.0.33.tar.gzroot@raspberrypi:/tmp/gd-2.0.33# ./configureroot@raspberrypi:/tmp/gd-2.0.33# make && make install

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The Raspberry Pi Nagios Recipe

Now we need to get on and install:root@raspberrypi:/tmp# wget

http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-3.4.1.tar.gz

root@raspberrypi:/tmp# tar xzf nagios-3.4.1.tar.gzroot@raspberrypi:/tmp/nagios# ./configure

–prefix=/usr/local/nagios –with-cgiurl=/nagios/cgi-bin –with-htmurl=/nagios/ –with-nagios-user=nagios –with-nagios-group=nagios –with-command-group=nagios

And then make:root@raspberrypi:/tmp/nagios# make all

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The Raspberry Pi Nagios Recipe

root@raspberrypi:/tmp/nagios# make install-initInstall and configure the directory for that holds the external

command file:root@raspberrypi:/tmp/nagios# make install-commandmodeInstall the apache configuration:root@raspberrypi:/tmp/nagios# make install-webconfAnd at the end install the sample config files:root@raspberrypi:/tmp/nagios# make install-config Restart the apache daemon:root@raspberrypi:/tmp/nagios# /etc/init.d/apache2 reload

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The Raspberry Pi Nagios Recipe

Now for the plugins :

apt-get install nagios-plugins nagios-snmp-pluginsOr by compiling them:root@raspberrypi:/tmp# wget

http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.15.tar.gz

root@raspberrypi:/tmp# tar xzf nagios-plugins-1.4.15.tar.gzroot@raspberrypi:/tmp/nagios-plugins-1.4.15# ./configureroot@raspberrypi:/tmp/nagios-plugins-1.4.15# make && make

install

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Using DNX

1.Download the automated installation script to the /tmp directory:

# cd /tmp2. # wget

http://assets.nagios.com/downloads/nagiosxi/scripts/NagiosXI3. Make the script executable:# chmod +x NagiosXI-DNX.sh4. Run the script in client mode# ./NagiosXI-DNX.sh -c5. Repeat steps 1-4 for each slave system.6. Repeat steps 1-3 on the master Nagios server.7. Run the script in server mode, optionally enabling automatic

synchronization

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Using DNX

Of course it’s not that easy :Modify the script to run under Debian,206c206< # iptables -I INPUT -p udp --dport 12480:12482 -j ACCEPT---> iptables -I INPUT -p udp --dport 12480:12482 -j ACCEPT246c246< wget -c $DOWNLOAD_URL -o dnx-$DNX_VERSION.tar.gz---> wget -c $DOWNLOAD_URL

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Using DNX

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Demonstration

First the Raspberry Pi running Nagios & DNX

Oh – just one more thing…..

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Futures & ‘Blue Sky thinking’

No limits to the possible uses for the RaspberryPI:

Remember it has a GPIO output capability so….

• For example true ‘traffic light displays’

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Raspberry Pi , Nagios & Traffic Lights

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RaspberryPi, Nagios & Traffic Lights

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Futures & ‘Blue Sky thinking’

No limits to the possible uses for the RaspberryPI:

• Rolling text displays• Digital Signage – Screenly-ose (on github.com)

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Futures & ‘Blue Sky thinking’

3D image of Tera 100You could build a supercomputer like this

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Futures & ‘Blue Sky thinking’

Iridis-piBut with Raspberry PI it might look like this –

64 nodes using Message Passing Interface

Futures & ‘Blue Sky thinking

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Futures & ‘Blue Sky thinking’

Iridis-piPair of Raspberry PI compute nodes in their Lego racking enclosure

Futures & ‘Blue Sky thinking

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Futures & ‘Blue Sky thinking’

How about adding a simple PBX to your current Nagios set-up?

Or just two lines that tell you something ?

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Futures & ‘Blue Sky thinking’

Take data from a weather station and post Twitter feeds & web site info

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Conclusions

For $35 this is a ‘fire & forget’ solution

Quite capable of monitoring SME’s and with DNX support even larger environments

Possibly the easiest way to drive / monitor exotic devicesOnly limited by your imagination

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Questions

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Colour palette

R41 V41 B41R41 V41 B41R95 V95 B95R95 V95 B95R178 V178 B178R178 V178 B178

R255 V204 B102R255 V204 B102

R0 V128 B0R0 V128 B0R119 V185 B0R119 V185 B0R151 V191 B13R151 V191 B13 R182 V0 B34R182 V0 B34R238 V134 B0R238 V134 B0

R96 V52 B129R96 V52 B129R0 V117 B182R0 V117 B182

BOOST coloursCore colours

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Le cloud by Bull logo

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3D image of Tera 100