On 11/6/07, Ward, Martin <user-2d33a6eb6a05@xymon.invalid> wrote:
Hi all,
I am a newbie to Hobbit and have inherited a working system. I have a good
idea of how it all hangs together but now I want to produce certain graphs
and cannot figure out how.
I have a cluster of mail servers that run Postfix; each of these clients
is monitored within Hobbit. In the Trends link for each client I have graphs
showing the various mail queues (incoming, deferred etc) and this data is
stored in RRD files on the Hobbit server.
Is there a way within Hobbit of creating a false or meta- client that can
have a graph with data from all of these RRD files? Particularly I would
like a graph that has all the incoming mail queue sizes on it with one line
per server. I already have this information in lots of different RRD files
but would like to have them all in one graph. I can create a graph outside
of Hobbit to do this, but within the monitoring system it restricts the RRD
files it will display data from to those in the data directory of the
selected client (in the Trends link).
Hmm. You could probably create a host and set up a noconn test to some
random IP like 10.0.0.1 (i.e. in bb-hosts: 10.0.0.1 fake-host #
noconn). Regardless of what host (or fake host, if you do that), you will
need to create a new RRD trend to that host.
You can create an RRD graph (by modifying hobbit-graph.cfg) that gets its
data from multiple RRD files. These files are usually created in a
directory for each host, and I don't know if you can just create a symlink
to those or not. But assuming that works, you should be all set in creating
a single graph that plots all the other data using a single scale.
I think you would want to add the following to hobbitserver.cfg:
GRAPHS="<whatever is already there>,custom-postfix"
And then hobbit-graph.cfg would look something like this:
[custom-postfix]
. . .
DEF:hosta:HostA.rrd:AVERAGE
DEF:hostb:HostB.rrd:AVERAGE
. . .
I have tried creating a new client in the data files ans symbolically
linking the other RRD files into its data directory, but cannot persude the
graphs to appear in the trends web page.
Thanks for your time,
|\/|artin