Service threshold parameters for custom SNMP-Based agent

LilPeek0 · December 3, 2025, 10:31am

Hello,

i was able to develop a working SNMP based agent for fortigates that queries different SNMP branches and returns the OID values.

For some of these I have thresholds that I have set in the script as default, but I would also like for my users to change those thresholds as needed for each device via the GUI.

So via GUI I would be to click on change parameters on a specific device and edit warning or critical thresholds for this particular device…

Is this possible?

From what I have seen on the Exchange it seems like it was:

github.com/martinmartossimon/check_mk_fortinet_sla

local/share/check_mk/web/plugins/wato/sla_fortinet.py

main

# -*- coding: utf-8 -*-
#
# License: GNU General Public License v2
#
# Author: martinmartossimon@gmail.com
# URL   : 
# Date  : 2022-01-19
#
# Monitor status of Fortinet SLAs

from cmk.gui.valuespec import (
    Dictionary,
    Integer,
    TextAscii,
)

from cmk.gui.plugins.wato import (
    CheckParameterRulespecWithItem,
    rulespec_registry,
    RulespecGroupCheckParametersOperatingSystem,

This file has been truncated. show original

This guy implemented it under ~local/share/check_mk/web/plugins/wato.

Which is deprecated now…

Thanks in advance

mschlenker · December 3, 2025, 12:07pm

For general advice on SNMP check plug-ins:

Regarding thresholds and so on, read the article on agent based check plug-ins:

LilPeek0 · December 3, 2025, 1:34pm

Thanks for the tips, I reviewed the SNMP based check plugin various times, but overlooked the agent based one since it was not what i was looking for.

In this case, as you stated, the thresholds and therefor the rulesets are actually explained in that KB…

BR