Issues with graphing single value

[satcom2k]

I am having issues with Cacti not graphing a specific OID on a metered PDU; Cacti is graphing and operating normally on all other devices I have configured. As far as I can tell the data template and graph templates are configured properly and I do see the SNMP information in the cacti log; it is just not placing anything in the graph (the same device is returning interface traffic stats no problem so I know its not the end device. Any help or ideas would be greatly appreciated.

Cacti Version = 0.8.6f
SNMP Version = 1
Device Type = APC Metered PDU

[rony]

What is the devices status in the device list?

[satcom2k]

The devices status is active; I am graphing the network interface already without any issues; it is only the one custom OID that I am having a problem with.

[rony]

What do you get if you attempt to snmpget the OID manually?

[satcom2k]

I recieve the proper response; esstential this is an APC metered PDU and I am trying to retrun the amp load on the PDU. Below is the snmpget/walk output. This number is then divided by 10 (via CDEF) to get the amp load; but the original value is not being inserted into the RRD; but it does show up in the cacti.log as retriving the proper value.

# snmpget -c 'xxxx' -v 1 192.168.1.200 PowerNet-MIB::rPDULoadStatusLoad.1
PowerNet-MIB::rPDULoadStatusLoad.1 = Gauge32: 50

# snmpget -c 'xxxx' -v 1 -O n 192.168.1.200 PowerNet-MIB::rPDULoadStatusLoad.1
.1.3.6.1.4.1.318.1.1.12.2.3.1.1.2.1 = Gauge32: 50

[BSOD2600]

1) Look in your poller cache for this entry, do you see it? If so paste the command.

2) With the logging level turned to debug, paste the command cacti executed for this snmp oid.

[satcom2k]

Here is the informaiton that I found in the poller cache.

Data Source: apc7381pudAmpLoad
RRD: /var/www/html/cacti/rra/pduap780201_red_na_invmc_com_apc7381pudampload_103.rrd
Action: 0, OID: 1.3.6.1.4.1.318.1.1.12.2.3.1.1.2.1 (Host: pduAP7802-01, Community: xxxx)

[gandalf]

You mentioned, that fetching the value via snmp works as seen in your cacti.log. So, what about the rrdtool update? Do you see that statement for the rrd file in question? What about cutting this from the log to command line and executing this manually? This is to verify, that this rrd was created correctly.
Another oprion would be to run the poller manually and have a look at the STDERR output (which normally goes to /dev/null). Even here you might see errors from rrdtool statements, but it produces lots of messages.
Reinhard

[satcom2k]

If I adjust the time for the update to the current time then the commands listed below run just fine "RRDTool Update"; if I just run the commands then they do no work because of the time offset.


/usr/local/rrdtool/bin/rrdtool update /var/www/html/cacti/rra/pduap780201_red_na_invmc_com_apc7381pudampload_102.rrd --template apc7381pudAmpLoad 1130536321:55

/usr/local/rrdtool/bin/rrdtool update /var/www/html/cacti/rra/pduap780201_red_na_invmc_com_apc7381pudampload_103.rrd --template apc7381pduAmpLoad 1130866442:54

[gandalf]

Fine, so updating is not the problem (we already talked about the permissions, right?). There will be no need to verify this using "rrdtool fetch <dsname> AVERAGE". Let's turn to the graph. Please select the failing one and click on the wrench. You will see the rrdtool graph statements used for this graph; post them, please.
Reinhard

[satcom2k]

Here is the RRDTool command genrating the graph image; a portion of the tital and DS name were substituted.


/usr/local/rrdtool/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="pduAP7802-01 domain_name - Amp Load" \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="" \
--slope-mode \
DEF:a="/var/www/html/cacti/rra/pduap780201_domain_name_apc7381ampload_430.rrd":apc7381AmpLoad:AVERAGE \
CDEF:cdefa=a,10,/ \
AREA:cdefa#FF0000:"" \
GPRINTLAST:"Current\:%8.2lf %s" \
GPRINTAVERAGE:"Average\:%8.2lf %s" \
GPRINTMAX:"Maximum\:%8.2lf %s\n"

[gandalf]

Here is the RRDTool command genrating the graph image; a portion of the tital and DS name were substituted.


/usr/local/rrdtool/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="pduAP7802-01 domain_name - Amp Load" \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="" \
--slope-mode \
DEF:a="/var/www/html/cacti/rra/pduap780201_domain_name_apc7381ampload_430.rrd":apc7381AmpLoad:AVERAGE \
CDEF:cdefa=a,10,/ \
AREA:cdefa#FF0000:"" \
GPRINTLAST:"Current\:%8.2lf %s" \
GPRINTAVERAGE:"Average\:%8.2lf %s" \
GPRINTMAX:"Maximum\:%8.2lf %s\n"

Well, this looks good. You may run it from cli. There should be lots of hieroglyphs.
May be there something wrong with the maximum value in your data source. Look at your data template, select the appropriate data source (e.g. apc7381AmpLoad) and verify the settings of the maximum value: Is there a "100"? Do your values exceed this one? In that case, rrdtool will supress them so they won't show up on your graph.
Or do a "rrdtool fetch <dataset> AVERAGE" and look at the results. If they read "NaN" there would be no update (up this should not occur, as updates are ok). Please post (last 10 lines may be enough).
Reinhard