[hobbit] Larrd graphs not working

[Michael Frey]

After running the commands as you outlined below, the output in file.png 
is:
Content-type: image/png
Expires: Thu, 29 Dec 2005 19:26:06 GMT

If I view the file.png file with a png viewer, it is only a black screen.

Michael Frey
Intel Senior Systems Engineer
The Guardian Life Insurance Company of America
3900 Burgess Place, 2-West
Bethlehem, PA 18017
E-Mail: Michael_frey at glic.com
Phone: 610-807-7889
Fax: 610-807-6003



henrik at hswn.dk (Henrik Stoerner) 
12/28/2005 06:06 PM
Please respond to
hobbit at hswn.dk



To
hobbit at hswn.dk
cc

Subject
Re: [hobbit] Larrd graphs not working






On Wed, Dec 28, 2005 at 05:06:16PM -0500, James B Horwath wrote:
> I'm trying to help a coworker debug/fix Hobbit running on Linux 7.2. I 
> know BB pretty well, but I'm just learning Hobbit.  Everything on the 
> Hobbit install works fine, except the larrd historical graphs.  For 
> example at the bottom of machine X's disk page the icon for the larrd is 

> grayed out.  I can click on it and see the next three grayed out icons 
> which should be larrd graphs.

Since the graph links show up, it sounds like the RRD files are being
created (meaning that the data is being picked up and archived); you
can check if there are any rrd-files in the data/rrd/HOSTNAME/
directories.

So I think it's a problem with the CGI that generates the actual graph
images. Debugging CGI's are a bit tricky, but:

- setup the environment variable QUERY_STRING, this is the part of the
  URL for the graph image that follows the '?'. It's done with
  export 
QUERY_STRING="host=voodoo.hswn.dk&service=conn&graph=hourly&action=view"
  (replace the hostname with what your host is called).
- also setup
    export REQUEST_METHOD=GET
    export REQUEST_URI=""
- run "~hobbit/cgi-bin/hobbitgraph.sh >/tmp/file.png"

Look at the output in /tmp/file.png. Any errors there ?

A common problem is that the rrdtool run-time library or some of
the graph libraries are not included in the default library search
path. You probably need to put the directory where these libraries
are installed into /etc/ld.so.conf and run "ldconfig" after that.


Regards,
Henrik


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