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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