SebA,

On the latest version of Xymon trunk, I cannot get the GRAPHS= feature in xymonserver.cfg to work as I would hope, following the instructions listed here: http://www.xymon.com/xymon/help/howtograph.html If I add disk1 so it becomes: GRAPHS="la,disk,disk1,<... lots more ...>,xymonproxy,xymond the disk1 graph does not show up on the trends page. However, I know the disk1 graph works, because I can view it by manipulating the URL generated when I click on the disk graph. And I know the xymonserver.cfg file is being read OK, because if I change disk to disk1 in the original line, the disk graph disappears altogether. What's wrong?

A problem I found a while ago with graphs in trends is that you need to have directory entries of the form 'disk1.*.rrd' (wildcard matching) - note they do not need to be the actual RRD files, since the graph drawing uses the FNPATTERN line in the graph definition to find the correct ones. Try doing a 'touch disk1.foo.rrd' in the rrd directory for the host you are trying to get the disk1 graphs into the trends column for.

Below is a summary I compiled of the issues in May 2009 (apologies for old-style pathnames).

I am building a range of graphs with devmon collecting RRD data. Some RRD files contain multiple datasets with different units - e.g. temperature and humidity.

I want all the graphs to appear in the trends column. Finally, after a lot of stuffing around with different combinations, it appears that the following conditions are required:

** RRD file name must exist starting with the graph/"service" name

• graph name must be listed in GRAPHS variable in hobbitserver.cfg
• doesn't matter if graph name is listed in TEST2RRD or not

So for the following graphs to work I created symlinks to env.*.rrd from humidity.*.rrd - e.g.

ls -l

total 120 -rw-rw-r-- 1 hobbit hobbit 38536 May 20 15:49 env.Rack2-Front.rrd -rw-rw-r-- 1 hobbit hobbit 38536 May 20 15:49 env.Rack5(XRAID)-Rear.rrd lrwxrwxrwx 1 root root 19 May 20 14:29 humidity.Rack2-Front.rrd -> env.Rack2-Front.rrd lrwxrwxrwx 1 root root 25 May 20 14:29 humidity.Rack5(XRAID)-Rear.rrd -> env.Rack5(XRAID)-Rear.rrd -rw-rw-r-- 1 hobbit hobbit 19552 May 20 15:48 tcp.conn.rrd

In fact, I found it was sufficient just to 'touch' the RRD filename to create an empty file - the graph CGI script uses the correct definition and finds the specified RRD file.

Section of hobbitgraphs.cfg [env] FNPATTERN env\.(.+).rrd TITLE Temperature YAXIS Celsius DEF:p at RRDIDX@=@RRDFN@:temp:AVERAGE LINE2:p at RRDIDX@#@COLOR@:@RRDPARAM@ GPRINT:p at RRDIDX@:LAST: \: %5.1lf (cur) GPRINT:p at RRDIDX@:MAX: \: %5.1lf (max) GPRINT:p at RRDIDX@:MIN: \: %5.1lf (min) GPRINT:p at RRDIDX@:AVERAGE: \: %5.1lf (avg)\n

[humidity] FNPATTERN env\.(.+).rrd TITLE Humidity YAXIS Percent DEF:p at RRDIDX@=@RRDFN@:humidity:AVERAGE LINE2:p at RRDIDX@#@COLOR@:@RRDPARAM@ GPRINT:p at RRDIDX@:LAST: \: %5.1lf (cur) GPRINT:p at RRDIDX@:MAX: \: %5.1lf (max) GPRINT:p at RRDIDX@:MIN: \: %5.1lf (min) GPRINT:p at RRDIDX@:AVERAGE: \: %5.1lf (avg)\n

It took me a while to work out a testing harness for debugging the CGI script, but I came up with the following shell script:

. /usr/lib/hobbit/server/etc/hobbitcgi.cfg HOST=$1 SERVICE=trends env REQUEST_URI=/hobbit-cgi/bb-hostsvc.sh?HOST=${HOST}\&SERVICE=$SERVICE SCRIPT_NAME=/hobbit-cgi/bb-hostsvc.sh QUERY_STRING=HOST=${HOST}\&SERVICE=$SERVICE REQUEST_METHOD=GET /usr/lib/hobbit/server/bin/hobbitsvc.cgi $CGI_SVC_OPTS --debug

The debug output would show me the rrd files as they were found, and allowed me to pin down that the graph name had to match the start of the RRD filename.

There's probably a few bugs in all of this. It would be nice not to have to create the RRD filenames by hand.

Thanks, David.

David.

-- David Baldwin - Senior Systems Administrator (Datacentres + Networks) Information and Communication Technology Services Australian Sports Commission http://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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