Linux, programming and more
After I wrote the posts about your own digital temperature sensor and Nagios/Icinga Traffic-Light its time to combine the two ideas and bring some lights to switch.
We have two working independent components, with a plugin is it possible to get the sensor status. If your temperature is higher then normal you should get a signal (Warning or Critical).
Define the new check command, with name and a plugin with some arguments:
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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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Monitoring is great! I try to monitor everything I can – each service and important cron-jobs.
Since I’m running on nginx I searched a lot around the web for munin plugins, maybe yo know this problem you found one but you get empty graph.
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Important hardware monitoring – check HDD temperature:
Install (Debian /Ubuntu way):
1 | aptitude install hddtemp |
Check it:
1 2 3 4 | hddtemp /dev/sda1 # Output: # /dev/sda1: ST31500341AS: 42°C # /dev/sdb1: ST31500341AS: 38°C |
1 2 3 | hddtemp -n /dev/sda1 Output: # 42 |
Some days ago I wrote a similar post about nagios and lighty, now I decided to test Icinga on Debian Squeeze.
The installation was pretty easy:
1 2 | aptitude install lighttpd aptitude install icinga |
To use Icinga we need following modules: