[Xymon] exclude devices from temp check?

[Adam Thorn]

On 30/08/2021 14:55, Christoph Zechner wrote:
> Hi,
> 
> I've been using the "temp" check from xymon's plugins (on Debian) and 
> wanted to ask if it was possible to excluce certain devices from the 
> check. We have "problems" with an USB stick, which is permanently 
> plugged into one of our machines and which does not have any temperature 
> sensors or readings, but sometimes xymon decides it now has somewhere 
> around 200 °C, which is of course not possible.

It looks like the 'temp' script just parses the output of hddtemp to 
produce its report, so I think the approach is to make hddtemp ignore 
the drive. I think that, by default, hddtemp assumes that a drive 
temperature is reported by smart attribute 194. Running "hddtemp 
/dev/sda"  on a drive I know is supported, I'm told:

/dev/sda: ST500NM0011: 28°C

That drive model doesn't look to match any of the regexes defined in the 
first column of my /etc/hddtemp.db so if I add a line to that file:

"ST500NM0011" 0 C "ST500NM0011"

(where I think the first column is a regex matching the drive model, the 
fourth is any human-friendly description, and the 0 means "not 
supported") then when I run the 'temp' xymon script, the line for 
/dev/sda switches to clear rather than green and it's excluded from the 
rrd data.

(Or: maybe the problem is just that your drive uses something other than 
smart attribute 194 to record the temperature? If so change the "0" to 
whichever attribute number is the right one)

Adam