Debian – Munin : aggregate network traffic

debianmonitoringmunin

I have a default configuration of munin-node on 3 of my servers, and I would like to create a summary chart that displays total output bandwidth.

Here is what I have done minin.conf :

[example.com;aggregation]
   update no
   total_bandwidth.graph_title Aggregated bandwidth
   total_bandwidth.upload.label upload
   total_bandwidth.upload.sum \
   serv1.example.com:if_eth0:up \
   serv2.example.com:if_eth0:up \
   serv3.example.com:if_eth0:up

But it's not working, I only get broken images instead of graphs. In munin-graph.log :

[RRD ERROR] Unable to graph /var/www/munin/example.com/aggregation/total_bandwidth-month.png : opening '': No such file or directory

EDIT :

Following http://waste.mandragor.org/munin_tutorial/munin.html, I have tried that wich does not work better :

[example.com;aggregation]
   update no

   total_bandwidth.graph_title Our total bandwidth

   total_bandwidth.out.sum example.com;serv1.example.com:if_eth0:up example.com;serv2.example.com:if_eth0:up
   total_bandwidth.out.draw STACK
   total_bandwidth.out.label Out bandwidth

   total_bandwidth.in.sum example.com;serv1.example.com:if_eth0:down example.com;serv2.example.com:if_eth0:down
   total_bandwidth.in.draw STACK
   total_bandwidth.in.label In bandwidth

Best Answer

Just replace if_eth0:down by if_eth0.down.

Related Solutions

How to get a total bandwidth graph in munin

Yes, it is done on the server side by creating a combined graph.

Basically it is done by describing a new graph in munin server configuration (munin.conf) where the data graphed is the sum of two data sources :

[some.machine.boo]
    total_http_bw.graph_order total_received
    total_http_bw.graph_title HTTP traffic recived by machine1 and machine2
    total_http_bw.graph_vlabel Kb/s
    total_http_bw.total_received.label HTTP received traffic
    total_http_bw.total_received.sum \
            machine1.machine.boo:http_bw:received \
            machine2.machine.boo:http_bw:received

You can find an example of stacking (graphing two data sources one on the top of the other) on munin web site. If you want to graph the sum of two data sources you can use the total_received.sum function instead of total_received.stack.

[edit] ive added the stanzas required to have the net interface bandwidth to this answer, as it makes for a more complete answer to the original question (and I can't select 2 correct answers etc)

I had a lot of trouble getting the net interfaces to give up their values as a SUM, so here is the end result of lots of random trial and error changes to get a SUM line chart of multiple munin nodes

    [mydomain.com;aggregates]
    total_bandwidth.graph_args --base 1000 -l 0
    total_bandwidth.cdef 0
    total_bandwidth.graph_category Network
    total_bandwidth.graph_title Aggregated bandwidth
    total_bandwidth.graph_vlabel Bits/sec
    total_bandwidth.upload.label upload
    total_bandwidth.total.graph yes
    total_bandwidth.upload.sum \
    mybox1.mydomain.com:if_eth0.up \
    mybox2.mydomain.com:if_eth0.up
    total_bandwidth.upload.type COUNTER
    total_bandwidth.download.type COUNTER
    total_bandwidth.download.label download
    total_bandwidth.graph_order upload download
    total_bandwidth.total.graph no
    total_bandwidth.download.sum \
    mybox1.mydomain.com:if_eth0.down \
    mybox2.mydomain.com:if_eth0.down

I suspect a few of those directives are either unnecessary or plain wrong, but I hope it is a working starting point for anyone trying to achieve the same.

I also suspect that it works better if you explicitly make sure that all the hosts are in the aggregates group, eg mydomain.com even if your hosts are incorrectly named locally eg hostname -f is wrong

Ubuntu – Munin Aggregate Graphs from several servers

There is a way look:

[ppke.hu;All_Totals]
  update no
  uptime.graph_title Uptimes
  uptime.graph_vlabel uptime in days
  uptime.draw LINE2
  uptime.graph_order \
    host1=host1.ppke.hu:uptime.uptime \
    host2=host2.ppke.hu:uptime.uptime \
    host3=host3.ppke.hu:uptime.uptime \
  uptime.graph_category system

I think you get the idea.

Later I replaced my munin monitoring with a more complete solution....

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