Add schleifenbauer PDU

[Wqrld]

This patch adds support for Power Distribution Units from https://www.schleifenbauer.eu

I was able to successfully read out my PDU's into grafana. I hope this may be useful for others too.

Note:
This query takes about one minute to run on my device, running into timeouts. Adding

    scrape_interval: 3m
    scrape_timeout: 2m

fixes this. I think this is an issue with many SNMP devices, so it might be an idea to add statements like these (with lower limits) to the readme example.

[bastischubert]

Hi @Wqrld,

could you please provide the updated generator/generator.yml and add the needed mib files for this to work to the Makefile?

[Wqrld]

The generator was also failing locally before adding my patch because of 404's, i had to rip those out of the makefile to generate this configuration.

[Wqrld]

Hi @Wqrld,

could you please provide the updated generator/generator.yml and add the needed mib files for this to work to the Makefile?

I do not have the rights to those original mib files so i'm not sure if i'm allowed to add them. They were taken from https://docs.schleifenbauer.eu/?dir=Interfaces/SNMP
If this is a hard requirement i'll send them an email for explicit permission

[bastischubert]

Shouldn't be an issue to curl their public available mib files in the generator/Makefile

[bastischubert]

The SCHLEIFENBAUER-PRODUCTS-MIB.txt seems not to be included in this zipfile, only in the older https://docs.schleifenbauer.eu/Interfaces/SNMP/PDU_mib_244.zip. If the file is necessary we'd need to get it from the 2nd zipfile.

[SuperQ]

This OID is overly broad. I think we want to be more targeted here with which walks to include. Some of the metrics included by this are read-write settings OIDs that have no meaning as metrics.

Let's start with the most useful part, the device table.

Suggested change

	- 1.3.6.1.4.1.31034.12
	- sdbMgmtCtrlDevicesTable

[Wqrld]

I think almost everything in 1.3.6.1.4.1.31034.12.1.1.2 would be of use, which is basically the whole generated list. There are a few you could leave out, but for my usecase more is better.