Re: [Devmon] APC PDU graph

[W.J.M. N. <Wim...@nl...>]

>>> I'm trying to make a template for a PDU to graph power consumption, i have no problems to extract metrics from snmp but graphs doesn't show up and i'm a bit disappointed.
>>> rrd files aren't generated ...
>>>
>>> bin/xymon localhost 'hobbitdlog pdu-b07-02.power'
>>> pdu-b07-02|power|green||1428417135|1428484091|1428485891|0|0|127.0.0.1||||N|
>>> green Wed Apr  8 11:08:08 2015
>>>
>>> PDU status:
>>>
>>> Load A      : 2.70
>>> Load B      : 3.20
>>> Power       : 5.90
>>>
>>> Devmon version 0.3.1-beta1 running on xymon
>>>
>>> TEST2RRD is set with "power=devmon"
>>>
>>
>> If the devmon-format is selected, Xymon expects a header like the following:
>> <!--DEVMON RRD: PduStatus 0 0
>> DS:LoadA:GAUGE:600:0:U DS:LoadB:GAUGE:600:0:UDS:Power:GAUGE:600:0:U
>>
>> You probably mean "power=ncv" in variable TEST2RRD.
>>
>>
> If i follow this : http://sourceforge.net/p/devmon/code/HEAD/tree/trunk/docs/GRAPHING
>
> It talks about devmon-format, why should i use ncv instead is there a difference ?
>
As stated in the article referenced above, the devmon-format is used to 
create graphs of repeater-type OIDs, such as the throughput on all 
interfaces of a switch. The data to extract from the xymon status message 
is encapsulated in a specially formatted HTML comment section. This section 
is generated by Devmon if the "TABLE:rrd" directive is used in the message 
file.

The NCV format is meant to graph a few (non-repeater) values. It expects a 
number of lines in the xymon status message, using the format '<Variable> : 
<Value>' or '<Variable> = <Value>'. Those variables are extracted from the 
message and send to an RRD, assuming that the '<Test>=ncv' is specified in 
TEST2RRD and that a variable named NCV_<Test> is defined in config file 
xymonserver.cfg. As a precaution all the ":" and "=" signs in the status 
message, not belonging to the NCV lines, can be replaced by their HTML 
equivalent.

In your case, I see two options:
  A- you generate the Demon header explicitly in the message file of the 
template
  B- you instruct Xymon to use the NCV format

Case A:

Include in the message file the following 5 lines:

<!-- linecount=1 -->
<!--DEVMON RRD: power 0 0
DS:LoadA:GAUGE:600:0:U DS:LoadB:GAUGE:600:0:U DS:Power:GAUGE:600:0:U
X {LoadA}:{LoadB}:{Power}
-->

The {...} refer to the variables as defined in the transforms file.
This should generate an RRD named "power.X.rrd".

Case B:

Include in file xymonserver.cfg:

TEST2RRD=....,power=ncv
NCV_power="LoadA:GAUGE,LoadB:GAUGE,Power:GAUGE,*:NONE"

This should result in an RRD named "power.rrd".


HTH,
   Wim Nelis.