[hobbit] Graphs not working on individual views, but working on trends view

[David Baldwin]

doctor at makelofine.org wrote:
> On Wed, 10 Mar 2010 11:31:31 -0800, "Mark Stoltzfus"
> <mark.stoltzfus at pmigroup.com> wrote:
>   
>> Hi, we just did a forklift upgrade from our old Hobbit servers to two
>> brand new boxes running Xymon 4.2.3, and for the most part, it's been a
>> seemless transition.  We noticed some strange behavior, though, with the
>> graphs.  The graphs under disk, cpu, and memory don't show up, but under
>> trends, they show up just fine.  I took a look at the different
>> shortcuts, and they look very similar to me, with the differences
>> highlighted in red:
>>
>> Link copied from "disk" section:
>> https://monitor.us.corp.pmigroup.com/xymon-cgi/hobbitgraph.sh?host=wal-d
>> dbs-01.us.corp.pmigroup.com&service=disk&graph_width=576&graph_heigh
>> t=120&first=1&count=3&disp=wal%2dddbs%2d01%2eus%2ecorp%2epmigroup%2ecom&
>> graph=hourly&action=selzoom
>>
>> Link copied from "trends" section:
>> https://monitor.us.corp.pmigroup.com/xymon-cgi/hobbitgraph.sh?host=wal-d
>> dbs-01.us.corp.pmigroup.com&service=disk&graph_width=576&graph_heigh
>> t=120&first=1&count=3&disp=wal%2dddbs%2d01%2eus%2ecorp%2epmigroup%2ecom&
>> nostale&color=green&graph=hourly&action=selzoom
>>
>> Any ideas as to what's going on?  I did find some old posts from Henrik
>> about troubleshooting graph generation, but the case he was dealing with
>> there was where the graphs wouldn't generate at all.  In this case, the
>> rrds are all there and the graphs are being generated, just not in all
>> views.
>>
>> Thoughts?
>>
>> Mark
>>     
>
> Hi,
>
> I got different issue with graphs, but I think my problem should be
> related to your comment :
> " I did find some old posts from Henrik about troubleshooting graph
> generation, but the case he was dealing with there was where the graphs
> wouldn't generate at all."
>   
It's worth checking hobbitgraph.cfg if you have added a number of your
own custom graphs.
The FNPATTERN operator is doing a regexp match, but in some cases the
default pattern definition is very loose.

For example, I'd added a bunch of devmon based system health check
reporting stuff which generated file names like
/var/lib/hobbit/rrd/HOSTNAME/temp.memory11.rrd
These were causing the memory graph to die because it was attempting to
query non-conformant RRDs for the particular graph. Solved by tightening
the regexp definition as below (adding ^ in front, which means the
filename has to start with memory, not just have it as a substring).

[memory]
        FNPATTERN ^memory.(.+).rrd
        TITLE Memory Utilization

Note that the FNPATTERN is not used when deciding if there are any RRD
files to use to display a graph at all on the test status page. It just
seems to glob TEST*.rrd to count the number of files to decide how many
lines to display on the graph for TEST. This is with 4.2.3.

David.

-- 
David Baldwin - IT Unit
Australian Sports Commission          www.ausport.gov.au
Tel 02 62147830 Fax 02 62141830       PO Box 176 Belconnen ACT 2616
david.baldwin at ausport.gov.au          Leverrier Street Bruce ACT 2617


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