On Tue, 21 Apr 2020 at 02:34, Stephan Schwarz <[email protected]>
wrote:
> Hi,
>
> I'm having an issue which I don't quite understand.
>
> I have successfully used the SNMP exporter now for a couple of devices,
> and so far the actual value that is returned always ended up as the metric
> value.
> Now I tried to add different device (CheckPoint firewall) and the value is
> now added as a label instead.
>
> For example, lets take the counter for conncurrent connections "
> asgCountersConcurrConnNum"
> The SNMP exporter displays the information like this
>
> # HELP asgCountersConcurrConnNum Number of concurrent connections -
> 1.3.6.1.4.1.2620.1.48.20.25.1.6
> # TYPE asgCountersConcurrConnNum gauge
> asgCountersConcurrConnNum{asgCountersConcurrConnNum="58852",asgCountersIndex="1"}
> 1
> asgCountersConcurrConnNum{asgCountersConcurrConnNum="68239",asgCountersIndex="2"}
> 1
> asgCountersConcurrConnNum{asgCountersConcurrConnNum="N/A",asgCountersIndex="3"}
> 1
> asgCountersConcurrConnNum{asgCountersConcurrConnNum="N/A",asgCountersIndex="4"}
> 1
>
>
> I'm pretty new to Prometheus, but I can't find an easy way to extract the
> asgCountersConcurrConnNum value in the label in order to graph this.
>
> Is there an easy way to force the SNMP exporter to present the data like this
> instead?
>
>
> asgCountersConcurrConnNum{asgCountersIndex="1"} 58852
> asgCountersConcurrConnNum{asgCountersIndex="2"} 68239
>
>
> Alternatively, can I create a query that will select the metric I want and
> return the value inside the label instead of the "actual" (but wrong) value?
> If so, an example would be welcome.
>
>
No, label values are opaque strings to PromQL that you can't do any math on.
>
> I used a different tool in order to check how the data is presented.
>
> Paessler SNMP Tester 5.2.3
> 4/21/2020 2:59:00 AM (11 ms) : Device: <ip>
> 4/21/2020 2:59:00 AM (16 ms) : SNMP V2c
> 4/21/2020 2:59:00 AM (23 ms) : Walk 1.3.6.1.4.1.2620.1.48.20.25.1.6
> 4/21/2020 2:59:00 AM (29 ms) : 1.3.6.1.4.1.2620.1.48.20.25.1.6.1.0 = "59714"
> [ASN_OCTET_STR]
> 4/21/2020 2:59:00 AM (38 ms) : 1.3.6.1.4.1.2620.1.48.20.25.1.6.2.0 = "68496"
> [ASN_OCTET_STR]
> 4/21/2020 2:59:00 AM (45 ms) : 1.3.6.1.4.1.2620.1.48.20.25.1.6.3.0 = "N/A"
> [ASN_OCTET_STR]
> 4/21/2020 2:59:00 AM (50 ms) : 1.3.6.1.4.1.2620.1.48.20.25.1.6.4.0 = "N/A"
> [ASN_OCTET_STR]
>
>
As you can see here the vendor decided to present the integer value as a
human readable string, which the snmp exporter then faithfully converts to
a label as that's the only way a string can be represented.
You can use regexp_extracts to pull out the number, for example
https://github.com/prometheus/snmp_exporter/blob/master/generator/generator.yml#L430
Brian
>
> Kind regards,
>
> Stephan Schwarz
>
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>
--
Brian Brazil
www.robustperception.io
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