graphs.cfg - Configuration of the showgraph CGI
uses the configuration file $XYMONHOME/etc/graphs.cfg to
build graphs from the RRD files collected by Xymon.
Each definition of a graph type begins with a "[SERVICE]" indicator,
this is the name passed as the "service" parameter to
If the service name passed to showgraph.cgi is not
found, it will attempt to match the service name to a graph via the TEST2RRD
environment variable. So calling showgraph.cgi with "service=cpu" or
"service=la" will end up producing the same graph.
A graph definition needs to have a TITLE and a YAXIS setting. These are texts
shown as the title of the graph, and the YAXIS heading respectively. (The
X-axis is always time-based).
If a fixed set of RRD files are used for the graph, you just write those in the
RRDtool definitions. Note that Xymon keeps all RRD files for a host in a
separate directory per host, so you need not worry about the hostname being
part of the RRD filename.
For graphs that use multiple RRD files as input, you specify a filename pattern
in the FNPATTERN statement, and optionally a pattern of files to exclude from
the graph with EXFNPATTERN (see "[tcp]" for an example). When
FNPATTERN is used, you can use "@RRDFN@" in the RRDtool definitions
to pick up each filename. "@RRDIDX@" is an index (starting at 0) for
each file in the set. "@RRDPARAM@" contains the first word extracted
from the pattern of files (see e.g. "[memory]" how this is used).
"@COLOR@" picks a new color for each graph automatically.
The remainder of the lines in each definition are passed directly to the RRDtool
The following is an example of how the "la" (cpu) graph is defined.
This is a simple definition that uses a single RRD-file, la.rrd:
TITLE CPU Load
AREA:la#00CC00:CPU Load Average
GPRINT:la:LAST: %5.1lf (cur)
GPRINT:la:MAX: %5.1lf (max)
GPRINT:la:MIN: %5.1lf (min)
GPRINT:la:AVERAGE: %5.1lf (avg)\n
Here is an example of a graph that uses multiple RRD-files, determined
automatically at run-time via the FNPATTERN setting. Note how it uses the
@RRDIDX@ to define a unique RRD parameter per input-file, and the @COLOR@ and
@RRDPARAM@ items to pick unique colors and a matching text for the graph
TITLE Disk Utilization
YAXIS % Full
GPRINT:p@RRDIDX@:LAST: %5.1lf (cur)
GPRINT:p@RRDIDX@:MAX: %5.1lf (max)
GPRINT:p@RRDIDX@:MIN: %5.1lf (min)
GPRINT:p@RRDIDX@:AVERAGE: %5.1lf (avg)\n
Normally the title of a graph is a static text defined in the graphs.cfg file.
However, there may be situations where you want to use different titles for
the same type of graph, e.g. if you are incorporating RRD files from MRTG into
Xymon. In that case you can setup the TITLE definition so that it runs a
custom script to determine the graph title. Like this:
command is then called with the hostname,
the graphtype, the period string, and all of the RRD files used as parameters.
The script must generate one line of output, which is then used as the title
of the graph.
Maps service names to graph definitions.
Most of the RRD graph definitions shipped with Xymon have been ported from the
definitions in the larrd-grapher.cgi
CGI from LARRD 0.43c.
xymonserver.cfg(5), rrdtool(1), rrdgraph(1)