[Xymon] External scripts thresholds via hobbit-clients.cfg

[Ralph Mitchell]

On Wed, Oct 19, 2011 at 10:56 AM, Scot Kreienkamp <SKreien at la-z-boy.com>wrote:

>  OK, I'm completely stumped on this one, and very Frustrated.
>
>
>
> Here's my line:
>
> DS Users cmrtgusers.rrd:ds0 >3 COLOR=red "TEXT=Exceeding 30 logged in
> users"
>
>
>
> The last value from the rrd was 35, so the line should be hit, but I get
> nothing.  I added debug to all the modules, I've tried several names for the
> column, I even linked the rrd to another name because it had a dash in the
> middle thinking the parser might not like that.  Still nothing.  I also then
> removed the rrd completely, hoping that I would at least get a line in one
> of the logfiles indicating a missing rrd.  I get NOTHING no matter what I
> do.  What am I doing wrong???  HELP!
>

I've just proved to my own satisfaction that a space between the symbol and
the number prevents the number from being read correctly.  i,.e.  ">15.0"
works, but "> 15.0" does not.  You can verify the number is being read by
inserting &L or &U in the TEXT string:

      DS Users cmrtgusers.rrd:ds0 >3 COLOR=red "TEXT=Exceeding &L logged in
users"

You should see "Exceeding 3.00 logged in users".  It seems to be OK without
or without the decimal, but with a space the number is read as 0.00.

If I found the correct piece, the code is in
xymon-4.3.3/xymond/client_config.c starting at line 1383 (line 1404 in
xymon-4.3.5).  The number is converted by atof() at line 1438 (line 1439 in
4.3.5), which is supposed to be able to deal with optional leading
whitespace, but apparently that's not happening here.

It takes a while for xymon to re-read the analysis.cfg file, so you might
want to alter the TEXT string a bit each time you try something, so you know
when the update takes effect.

Ralph Mitchell
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