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Nagios/Icinga Traffic-Light

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Nagios and Icinga have a lot of notification opportunities, receive status via Mail, SMS, Twitter or maybe XMPP? Sometimes is it not easy to decide what you really need and what is better for your quick reaction.

If you have more than one monitor it is easy to overlook an important mail, or your mobile phone is in silent mode and you don’t know that you get a critical notification.

If you are a webmaster and you are working a lot with your browser – there is a solution for Mozilla Firefox with terrible wake up sounds – called Nagios Checker for Mozilla Firefox:
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HDD temperature

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Important hardware monitoring – check HDD temperature:

Install (Debian /Ubuntu way):

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aptitude install hddtemp

Check it:

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hddtemp /dev/sda1
# Output:
# /dev/sda1: ST31500341AS: 42°C
# /dev/sdb1: ST31500341AS: 38°C
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hddtemp -n /dev/sda1
Output:
# 42

Create Nagios Icons

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Nagios

If you ever tried to make Nagios Status-Map a little nicer by adding some dependencies and some pretty icons, you have probably came across some little collections/packs of icons at NagiosExchange.
But if you need a special one, you must do it by yourself.
And you probably noticed that you need images with .gd2 extension
Here is how to convert a PNG image into .gd2 (GD Graphics Library format)

Solution one:

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aptitude install netpbm
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pngtopnm example.png | pnmtopng -transparent =rgb:00/00/00 2>/dev/null | pngtogd2 /proc/self/fd/0 example.gd2 0 1

Solution two:

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aptitude install libgd-tools
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pngtogd2 phone.png phone.gd2 0