[hobbit] Problem with hobbitd_rrd custom graph

[Davíð Steinn Geirsson]

Hi Graham,

Good find, thanks! I haven't tried the fix yet, but given your 
description of it and that our snapshot does include the RRD cache 
mechanism I think it's safe to say this is it. I'll try your patch tomorrow.

Kind regards,

Davíð

Graham Nayler wrote:
> Davíð
> 
> That sounds exactly the same problem I was having. What version is your 
> hobbit installation? If recent source (ours is 4.3.0, and I don't know 
> when the caching went in), it could be that this is your answer. 
> http://www.hswn.dk/hobbiton/2008/09/msg00283.html
> 
> Check back through that log and see if you have occasional lines like
> Flushing '/<hostname>/temp.rrd' with 1 updates pending, template 
> '11:12:13:21:31:41:42'
> just before the "Unlinking temp file" entries, corresponding to when you 
> saw points on the graph.
> 
> Graham Nayler
> 
> ----- Original Message ----- From: "Davíð Steinn Geirsson" <david at basis.is>
> To: <hobbit at hswn.dk>
> Sent: Monday, September 29, 2008 4:17 PM
> Subject: [hobbit] Problem with hobbitd_rrd custom graph
> 
> 
>> Hi all,
>>
>> I'm trying to create a custom graph for hobbit but am having some 
>> problems.
>>
>> I have a script doing SNMP probing and returning status messages to 
>> hobbit. I have another script that generates RRD definitions for 
>> hobbitd_rrd.
>>
>> I've added the script to hobbit_rrd extra_scripts:
>> [rrdstatus]
>>         ENVFILE /usr/lib/hobbit/server/etc/hobbitserver.cfg
>>         NEEDS hobbitd
>>         CMD hobbitd_channel --channel=status 
>> --log=$BBSERVERLOGS/rrd-status.log hobbitd_rrd --rrddir=$BBVAR/rr
>> d --extra-script=/usr/lib/hobbit/server/ext/sensatronics-grapher.py 
>> --extra-tests=temp  --debug
>>
>>
>> I've also made a graph definition in hobbitgraph.cgi (not really the 
>> finished definition, but I think it should work for testing):
>> [temp]
>>         TITLE Sensatronics environment monitor
>>         YAXIS Measurement
>>         DEF:11=sensatronics.rrd:11:AVERAGE
>>         DEF:12=sensatronics.rrd:11:AVERAGE
>>         DEF:13=sensatronics.rrd:11:AVERAGE
>>         DEF:21=sensatronics.rrd:11:AVERAGE
>>         DEF:31=sensatronics.rrd:11:AVERAGE
>>         DEF:41=sensatronics.rrd:11:AVERAGE
>>         DEF:42=sensatronics.rrd:11:AVERAGE
>>         LINE2:11#00CCCC:value
>>         COMMENT:\n
>>         GPRINT:11:LAST: \: %5.1lf (cur)
>>         GPRINT:11:MAX: \: %5.1lf (max)
>>         GPRINT:11:MIN: \: %5.1lf (min)
>>         GPRINT:11:AVERAGE: \: %5.1lf (avg)\n
>>
>>
>> Now, the rrd file is created but only occasionally do I see values 
>> entered into it (I haven't seen a pattern - looking over the rrd 
>> generated over the weekend I see some values, sometimes 30 minutes 
>> apart, sometimes hours, but almost all the measurement points show NaN)
>>
>> My script is being executed every 5 minutes.
>>
>> Here is the output from rrd-status.log (with hobbitd_rrd run with 
>> --debug flag):
>> 2008-09-29 14:03:37 Want msg 698, startpos 1151746, fillpos 1151746, 
>> endpos -1, usedbytes=0
>> , bufleft=425213
>> 2008-09-29 14:03:38 hobbitd_rrd: Got message 698 
>> @@status#698/tankar_hiti|1222697018.325994
>> |10.200.10.3||tankar_hiti|temp|1222698818|green||green|1222263717|0||0||0|0 
>>
>> 2008-09-29 14:03:38 startpos 1152334, fillpos 1152334, endpos -1
>> 2008-09-29 14:03:38 -> do_external(tankar_hiti, temp)
>> 2008-09-29 14:03:38 000021108 : Saving msg to file 
>> /usr/lib/hobbit/server/tmp/rrd_msg_21108
>> 2008-09-29 14:03:38 <- do_external(tankar_hiti, temp)
>> 2008-09-29 14:03:38 Want msg 699, startpos 1152334, fillpos 1152334, 
>> endpos -1, usedbytes=0
>> , bufleft=424625
>> 2008-09-29 14:03:38 000021108 : Calling helper script 
>> /usr/lib/hobbit/server/ext/sensatroni
>> cs-grapher.py tankar_hiti temp /usr/lib/hobbit/server/tmp/rrd_msg_21108
>> 2008-09-29 14:03:38 000021108 : Helper input 'DS:11:GAUGE:600:0:U'
>> 2008-09-29 14:03:38 000021108 : Helper input 'DS:12:GAUGE:600:0:U'
>> 2008-09-29 14:03:38 000021108 : Helper input 'DS:13:GAUGE:600:0:U'
>> 2008-09-29 14:03:38 000021108 : Helper input 'DS:21:GAUGE:600:0:U'
>> 2008-09-29 14:03:38 000021108 : Helper input 'DS:31:GAUGE:600:0:U'
>> 2008-09-29 14:03:38 000021108 : Helper input 'DS:41:GAUGE:600:0:U'
>> 2008-09-29 14:03:38 000021108 : Helper input 'DS:42:GAUGE:600:0:U'
>> 2008-09-29 14:03:38 000021108 : Helper input 'sensatronics.rrd'
>> 2008-09-29 14:03:38 000021108 : Helper input '7:62:4:21:27:24:16'
>> 2008-09-29 14:03:38 000021108 : Unlinking temp file
>> 2008-09-29 14:03:38 get_hobbitd_message: Interrupted
>>
>> The 'get_hobbitd_message: Interrupted' message always appears after 
>> accepting input from my script.
>>
>> Any ideas?
>>
>> Kind regards,
>>
>> -- 
>> Davíð Steinn Geirsson
>> Basis ehf.
>> david at basis.is / (+354) 575-0419
>>
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>>
>>
>>
> 
> 
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-- 
Davíð Steinn Geirsson
Basis ehf.
david at basis.is / (+354) 575-0419