All hosts network traffic graph page

On Sat, Mar 08, 2008 at 09:35:49PM -0600, Taylor Lewick wrote:

Is there a simple way to setup a view via a report or link in hobbit so
that I can display all of the hosts network traffic graphs?

Kind of like an mrtg style view.  That way if we see bandwidth spike on
our switch we can pull up this page and get a quick view of which hosts
are talking a lot?

Tricky, because network interface names vary from one host to another.

What you can do is to create a multi-graph definition in 
hobbitgraph.cfg that picks out the exact NIC graph you want. 
Copy the existing "ifstat" definition, and make a new "eth0-multi"
graph where the FNPATTERN refers only to the interface graph 
you want - i.e. instead of the "ifstat.(.+).rrd" pattern you 
refer to the exact "ifstat.INTERFACE.rrd" file matching the name
of your NIC. E.g. for "eth0":

[eth0-multi]
        FNPATTERN ifstat.eth0.rrd
        TITLE Network Traffic
        YAXIS Bits/second
        DEF:inbytes at RRDIDX@=@RRDFN@:bytesReceived:AVERAGE
        CDEF:in at RRDIDX@=inbytes at RRDIDX@,8,*
        DEF:outbytes at RRDIDX@=@RRDFN@:bytesSent:AVERAGE
        CDEF:out at RRDIDX@=outbytes at RRDIDX@,8,*
        LINE2:in at RRDIDX@#@COLOR@:@RRDPARAM@  inbound
        GPRINT:in at RRDIDX@:LAST: \: %10.1lf (cur)
        GPRINT:in at RRDIDX@:MAX: \: %10.1lf (max)
        GPRINT:in at RRDIDX@:MIN: \: %10.1lf (min)
        GPRINT:in at RRDIDX@:AVERAGE: \: %10.1lf (avg)\n
        LINE2:out at RRDIDX@#@COLOR@:@RRDPARAM@ outbound
        GPRINT:out at RRDIDX@:LAST: \: %10.1lf (cur)
        GPRINT:out at RRDIDX@:MAX: \: %10.1lf (max)
        GPRINT:out at RRDIDX@:MIN: \: %10.1lf (min)
        GPRINT:out at RRDIDX@:AVERAGE: \: %10.1lf (avg)\n

Then you can create a new metric on the "Metrics Report" page by adding
a new "<option>" ... in the ~hobbit/server/web/hostgraphs_form : Find 
the "<SELECT" tag and add an option for the "eth0" graph:

	<SELECT NAME=testname MULTIPLE SIZE=15>
	<option value="ALL" SELECTED>ALL</option>
	... other current options ...
	<option value="eth0">Network I/O eth0</option>

Note that in hobbitgraph.cfg the name is "eth0-multi", but in the
hostgraphs_form it is just "eth0". The "-multi" is added automatically.

You should then be able to view the eth0 I/O from the Metrics report
page.


Regards,
Henrik