Dave Williams's presentation on The All-in-One Nagios Solution. The presentation was given during the Nagios World Conference North America held Sept 20-Oct 2nd, 2013 in Saint Paul, MN. For more information on the conference (including photos and videos), visit: http://go.nagios.com/nwcna

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2nd October 2013 Dave Williams
Technical Architect
The All-in-One Nagios Solution -

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Agenda
Background
The Raspberry Pi
The Raspberry Pi Nagios Recipe
All-in-One
Demonstration
Futures & ‘Blue Sky thinking’
Questions

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Background
UK based
Mainframe (IBM & Honeywell)
Unix (HP-UX, AIX, Solaris)
Linux (RedHat, SLES, Debian)
Network (CASE, 3COM, CISCO)
Working for Bull
French Computer Manufacturer
Mainframes, Unix, HPC,
Security, Managed Services,
Advisory Services

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Background
System Monitoring
OpenView
Netview
Open Master
Open Source Monitoring
NetSaint on AIX
Nagios

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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
year
The 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
Raspberry Pi’s are nearly everywhere
http://rastrack.co.uk

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How big is yours ?

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The All-in-One

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This is probably big enough

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The Raspberry Pi

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Raspberry Pi
Because it is a 5V DC device it can be run from a small battery
pack – giving the ability to smooth incoming power and also
prevent power interruptions.
The SME monitor can survive power outages even when UPS’
are not deployed or are confined to essential equipment.
Open up possibilities of using Out of Band alerts for
environmental outages – using a real mobile phone for SMS
text alerting would mean that both the Raspberry Pi and the
mobile phone could continue to work during a total power
loss.

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Raspberry Pi
An inexpensive way of powering your Raspberry Pi

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Raspberry Pi
Something more elegant to act as a real UPS

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The Raspberry Pi Nagios Recipe
Nagios Instance
3.5.2
4.0.0
Apache2
Asterix
Motion

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All-in-One Alerting

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Asterix Configuration
define command{
command_name notify-service-by-phone
command_line /usr/local/bin/notify-by-phone.sh $CONTACTADDRESS2$
"'This is a Nagios Service alert type $NOTIFICATIONTYPE$. Nagios Service Alarm.
$HOSTNAME$ has a problem with $SERVICEOUTPUT$. The problem is
$SERVICESTATE$.'"
"'$NOTIFICATIONTYPE$:$SERVICEDESC$:$HOSTNAME$:$SERVICESTATE$:$SERVICEO
UTPUT$'" $SERVICEEVENTID$
}

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Asterix Configuration
/usr/local/bin/notify-by-phone.sh
#!/bin/bash
channel=$1
alarmtext=$2
alarmsub=$3
alarmid=$4
cd /tmp
echo $alarmtext > alarm_$alarmid.txt
echo $alarmsub > sub_$alarmid.txt
echo $alarmsub >> alarm_$alarmid.txt

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Asterix Configuration
echo 'Press 1 to repeat this message, or press 2 to acknowledge the alert.' >>
alarm_$alarmid.txt
/usr/bin/text2wave -o alarm_$alarmid.wav alarm_$alarmid.txt
/usr/bin/sox alarm_$alarmid.wav -r 8000 alarm_$alarmid.ul
/bin/mv -f alarm_$alarmid.ul alarm_$alarmid.ulaw
/bin/rm alarm_$alarmid.wav

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Asterix Configuration
echo "Channel: $channel
MaxRetries: 2
RetryTime: 60
WaitTime: 30
Context: alarm
Extension: 9999
Priority: 1
Set: alarmid=$alarmid" > alarm_$alarmid.call
/bin/chmod 777 alarm_$alarmid.call
/usr/bin/sudo /bin/mv alarm_$alarmid.call /var/spool/asterisk/outgoing

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Asterix Configuration – extension.conf
[alarm]
exten => 9999,1,Answer
exten => 9999,2,NoOp(alarmid: ${alarmid})
exten => 9999,3,BackGround(/tmp/alarm_${alarmid})
exten => 9999,4,WaitExten(15)
exten => 9999,5,Hangup()
exten => _1,1,Goto(alarm,9999,3)
exten => _2,1,System(/usr/bin/sudo /bin/cp /tmp/sub_${alarmid}.txt
/home/nagios/tmp/)
exten => _2,2,System(/usr/bin/sudo /home/nagios/start.pl ${alarmid})
exten => _2,3,Background(/usr/local/share/sounds/HAL_goodbye)
exten => _2,4,Hangup()

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Asterix Configuratio sip.conf
[voipfone]
type=peer
secret=?????
username=NNNNNNNN
fromuser=NNNNNNNN
fromdomain=sip.voipfone.net
host=sip.voipfone.net
insecure=very
dtmfmode= rfc2833
context=fromvoipfone # inbound calls falls in this context of
dialplan

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Asterix results
'This is a Nagios Service alert type CUSTOM. Nagios Service
Alarm. localhost has a problem with DISK OK - free space: /
1337 MB (38% inode=67%):. The problem is OK.‘
Press 1 to repeat this message, or press 2 to acknowledge the
alert.

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Asterix driven acknowledgement

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Motion – motion.conf
; on_event_start value
on_event_start cd /etc/motion/scripts && send_nsca -H localhost -c send_nsca.cfg
< passive_camera_warning
Uses send_nsca to send standard alert:
File: passive_camera_warning contains :
localhost Camera Motion Detection 1 WARNING: Motion detected

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All-in-One
Demonstration
Viewed using Midori browser
Memory before X & Browser
total used free shared buffers cached
Mem: 383972 146680 237292 0 16300 79924
-/+ buffers/cache: 50456 333516
Swap: 102396 0 102396
Memory after X & Browser
total used free shared buffers cached
Mem: 383972 246860 137112 0 23120 129804
-/+ buffers/cache: 93936 290036
Swap: 102396 0 102396

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Futures & ‘Blue Sky thinking’
The All-in-One commercially could cost less than $1999
Including all equipment, a days installation / configuration and a limited
number (3-5) calls to a helpdesk.
Small & Medium enterprises could have their own system monitors with
alerting and visual displays for less than a cost of a small rack server.
Easily extend to Environment Monitoring
Possible European offer by Bull as ‘Vision-Pi’ as part of their Vision
Services offer.

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Futures & ‘Blue Sky thinking’
Still more possibilities
Can Nagvis or NagiosTV be implemented on the All-in-One
Can Nagios XI be built and be practical on the All-in-One.
– Will the sizing & performance be practical ?
– Can a suitable licencing scheme be worked out with Ethan for ARM ?
What other monitoring scenarios can be added ?

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Environment Monitoring
Using a 1-wire sensor DS18B20
Raspberry Pi already has kernel modules for this
t=23062, that is 23 degrees Centigrade

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Fancy something bigger ?

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Raspberry Pi Development System
Motorola Atrix LapDock & a couple of adapters

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Closing Thoughts
Disruption – price / availability / capability
Hoover – the brand for Vacuum Cleaners
Phillips – name for Cross Head screwdrivers
Nagios – the name for system monitors

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Questions ?

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