[hobbit] Graph Network Usage

[Charles Jones]

Have you tried any recent snapshots of Hobbit? It already creates an 
inbound,outbound Bits/second graph for all of your interfaces, as well 
as another graph which shows Packets/second (In,Out,& Retrans). I also 
like the Clock offset graph, which comes in handy for pointing out how 
poorly vmware instances keep their clocks synced :)

-Charles

Jeff Stuart wrote:

>As we all know, you can use MRTG + SNMP to graph network usage.  BUT instead 
>of having to install 2 new programs + an external hobbit script that runs 
>either on each box or on a centralized location, you can use this external 
>script that runs on the client.
>
>Basically it just grabs the data from the /proc/net/dev file.  Note: this 
>probably only works on Linux.
>
>Then you add the following lines to your hobbitserver.cfg:
>
>TEST2RRD="cpu=la,disk,inode,...,hobbitd,bandwidth=ncv"
>NCV_bandwidth="bytesin:COUNTER,bytesout:COUNTER"
>GRAPHS="la,disk,inode,...,hobbitd,ncv,bandwidth"
>
>Then in your hobbitgraph.cfg, add this entry:
>
>[bandwidth]
>        TITLE Network Traffic
>        YAXIS Bits/Second
>        DEF:inbytes=bandwidth.rrd:bytesin:AVERAGE
>        CDEF:in=inbytes,8,*
>        DEF:outbytes=bandwidth.rrd:bytesout:AVERAGE
>        CDEF:out=outbytes,8,*
>        CDEF:total=in,out,+
>        VDEF:pct95=total,95,PERCENT
>        LINE2:in#00FF00:Inbound
>        GPRINT:in:LAST: \: %9.1lf (cur)
>        GPRINT:in:MAX: \: %9.1lf (max)
>        GPRINT:in:MIN: \: %9.1lf (min)
>        GPRINT:in:AVERAGE: \: %9.1lf (avg)\n
>        LINE2:out#FF0000:Outbound
>        GPRINT:out:LAST: \: %9.1lf (cur)
>        GPRINT:out:MAX: \: %9.1lf (max)
>        GPRINT:out:MIN: \: %9.1lf (min)
>        GPRINT:out:AVERAGE: \: %9.1lf (avg)\n
>        LINE2:total#00CCCC:Total Usage
>        GPRINT:total:LAST: \: %8.1lf (cur)
>        GPRINT:total:MAX: \: %8.1lf (max)
>        GPRINT:total:MIN: \: %8.1lf (min)
>        GPRINT:total:AVERAGE: \: %9.1lf (avg)\n
>        LINE1:pct95#0000FF:Outbound 95th percentile
>        GPRINT:pct95:\: %6.2lf %Sbps \n
>
>And then finally setup this script as an external script for each client:
>
>#!/bin/sh
>
>/bin/grep eth0 /proc/net/dev | /bin/awk '{print "bytes_in : " 
>$2 "\nbytes_out : " $10}' > $BBTMP/bandwidth.txt
>
>$BB $BBDISP "status $MACHINE.bandwidth green `date`
>
>`cat $BBTMP/bandwidth.txt`
>"
>
>/bin/rm $BBTMP/bandwidth.txt
>exit 0
>
>Hope this helps someone!  
>
>P.S.
>	Thx Henrik for your EXCELLENT tutorial on the NCV graph stuff.  Made my job a 
>1000x easier! :)  Also, in the next week, I'm gonna be blowing my boss's mind 
>with some of the stuff I'll be able to track and graph.  Hehe.. there's just 
>SOO MUCH you can do when you can do it on the command line vs a windows 
>program that can only access stuff via SNMP/TCP/UDP probes.
>
>  
>