Service check_nut_plus

Icinga 2
1

Hi all. I’d like to strip something out of the check_nut_plus plugin output.
Running this plugin it generates always this extra line:

Init SSL without certificate database

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I know I can enable the extra SSL layer on my NUT client/server setup … but that’s a lot of overhead for my home lab.

Some more details:

Running the plugin directly from cli:
perl check_nut_plus -d ups1@192.168.1.32:3492 -v "ups.load=w>60:c>=70" -D

DEBUG
Init SSL without certificate database
KV3: (w,>,60)
KV3: (c,>=,70)
$VAR1 = {
          'c' => [
                   {
                     'op' => '>=',
                     'value' => '70'
                   }
                 ],
          'w' => [
                   {
                     'value' => '60',
                     'op' => '>'
                   }
                 ]
        };
Cc
ups.load 25 >= 70
Cw
O: ups.load=25
OK: ups.load=25

Running directly the upsc command:
upsc ups1@192.168.1.32:3492

Init SSL without certificate database
battery.charge: 100
battery.runtime: 600
battery.voltage: 13.60
battery.voltage.high: 12
battery.voltage.low: 8
battery.voltage.nominal: 12.0
device.type: ups
driver.name: blazer_usb
driver.parameter.pollinterval: 2
driver.parameter.port: auto
driver.parameter.productid: 5161
driver.parameter.runtimecal: 60,100,360,50
driver.parameter.subdriver: cypress
driver.parameter.synchronous: no
driver.parameter.vendorid: 0665
driver.version: 2.7.4
driver.version.internal: 0.12
input.current.nominal: 3.0
input.frequency: 50.3
input.frequency.nominal: 50
input.voltage: 242.0
input.voltage.fault: 242.0
input.voltage.nominal: 230
output.voltage: 241.4
ups.beeper.status: enabled
ups.delay.shutdown: 30
ups.delay.start: 180
ups.load: 29
ups.productid: 5161
ups.status: OL
ups.temperature: 25.0
ups.type: offline / line interactive
ups.vendorid: 0665

I can remove that line with this command:
/bin/upsc > /dev/stdout 2> /dev/null ups1@192.168.1.32:3492
But I don’t know how to implement this into the perl script …

Resources:
https://exchange.nagios.org/directory/Plugins/Hardware/UPS/check_nut_plus/details
https://webnote.satin-pl.com/public/nut/check_nut_plus.txt

Any help or guidance highly appreciated :eyeglasses:

2

Does it output that line without the -D flag? I’m reading the manpage for the Nagios check and seeing it doesn’t have an option to ignore certificate warnings. I haven’t written a line of perl in probably 10 years so that code is a mess to me too, but if it’s calling upsc, stderr can likely be redirected to nowhere if you feel like hacking it yourself.

Looks like it really just expects you to have a self signed one in there and not like going to the effort to set up letencrypt or anything like that. I’d just go off the NUT security doc if it were me.

3

Yes. Without the -D I still have that line.

Exactly, I found out how but I don’t know how to implement this in the Perl code.
This command removes it:
/bin/upsc > /dev/stdout 2> /dev/null ups1@192.168.1.32:3492