check_digitemp

                                

        
        

            
            

                

    

    
check_digitemp


Nagios-plugin to read the the temperature of a one wire sensor (like DSL 1820) and compare it with the supplied thresholds.


Installation


    

  1. First start digitemp with these parameters digitemp_DS9097 -i -s /dev/ttyS0
    2. 

  2. Then copy the file .digitemprc to /usr/local/nagios/ and the script check_digitemp.sh to the check-plugins-directory e.g. /usr/local/nagios/libexec 
    3. 

  3. Install sudo and edit the file /etc/sudoers. Insert nagios ALL=(ALL) NOPASSWD: /usr/bin/digitemp_DS9097
    4. 

  4. Copy the file .digitemprc also to the /(root)-directory. This is needed, because the nrpe-daemon starts the programms with the PWD=/
    5. 



Todo


    

  • errorhandling
    • 

  • check range and value of parameters
    • 



Needed hard- and software


software


    

  • digitemp (e.g. apt-get install digitemp)
    • 



hardware



Usage


`./check_digitemp -ts  -w  -c  -f`


Output


The plugin prints the temperature in centigrade or in fahrenheit followed by "ok" or either "warning" or "critical" if the corresponding threshold is reached.


Exit Codes


0 OK       Temperature checked and everything is ok
1 Warning  Temperature  above "warning" threshold
2 Critical Temperature  above "critical" threshold
3 Unknown  Invalid command line arguments or could not read the sensor


Example


check_digitemp -ts C -w 22 -c 25 -f

21.81 C - ok          (exit code 0)
23.00 C - warning     (exit code 1)
26.23 C - critical    (exit code 2)


Paths to commands used in this script. These may have to be modified to match your system setup.


Links


http://www.linuxnetmag.com/de/issue8/m8temperature1.html (german)


http://www.linuxnetmag.com/en/issue8/m8temperature1.html (english)