Using snmp string values for graphs

[HunterSeeker]

Hi everyone,
I have a BladeCenter which I am monitoring with Zabbix using snmp. The BladeCenter returns temperatures in string form, for example "36 Centigrade". Is there a way to use these values to graph temperatures?

EDIT:
I've looked more into the issue and it seems someone had a similar problem back in 1.6.x and the feature to work with strings was promised. The thread I looked at is here:

http://www.zabbix.com/forum/showthread.php?t=6118

EDIT2:
Would it be possible to use say a script to parse the string and have zabbix take the value from there? Is it possible to create an item in this way?

[HunterSeeker]

A colleague told me that he wrote a script for one of Zabbix's competitors to enable this function. Is it possible to do something similar with Zabbix?

EDIT: Script
I found out the way to do this is using "external checks." For that purpose I made the following simple script:

#!/bin/bash
Norm=37
Crit=41

TempValue=$(/usr/bin/snmpget -c X -v 1 x.x.x.x 1.3.6.1.4.1.2.3.51.2.2.10.5.5.30.1.3.6)

TempValue2=${TempValue:62:2}

echo $TempValue2

if [ $TempValue2 -lt $Norm ]; then
        exit 0
else
        if [ $TempValue2 -ge $Crit ]; then
                exit 2
        else
                if [ $TempValue2 -ge $Norm ]; then
                        exit 1
                fi
        fi
fi
exit 3

Is there a way to get Zabbix to use TempValue2 for a graph?

[HunterSeeker]

Can anyone help? Is something wrong with my script perhaps? Is echoing the value not enough. Zabbix shows no errors.

[alixen]

Hi,

I've seen 2 problems in your script:
1. You don't specify actual host in snmpget command.
Zabbix will pass DNS name or IP address (depending on host configuration) as first parameter to your script. You should replace x.x.x.x in your script by $1.

2. All other checks look like Nagios specific, they are useless (you will define your warning and critical thresholds in Zabbix triggers).

This script should be OK:

#!/bin/bash
TempValue=$(/usr/bin/snmpget -c X -v 1 $1 1.3.6.1.4.1.2.3.51.2.2.10.5.5.30.1.3.6)
TempValue2=${TempValue:62:2}
echo $TempValue2

Regards,
Alixen

[HunterSeeker]

Should the IP be in the script or passed as a parameter? x.x.x.x was supposed to represent my IP. The script outputs the correct value when I run it but Zabbix claims there is no data.
If it helps here is the item configuration:


EDIT: The item is set to active, not "not supported."

EDIT2: Interesting side note, my script does not work when I run it with SH, but it does with BASH.

[alixen]

Hi,

Should the IP be in the script or passed as a parameter?

It depends.
No if you use it only for one host.
Yes you if want to use it one several hosts or in a template.

EDIT: The item is set to active, not "not supported."

In your screenshot, your item is "Not supported"
When Zabbix sets an item as "Not supported", it logs an error message in zabbix-server.log.
Have you checked it ?
You can set it to "Active" and check zabbix-server.log.

EDIT2: Interesting side note, my script does not work when I run it with SH, but it does with BASH.

Your script uses $(cmd) and ${..} that are pure bash.

Regards,
Alixen