Today, Meik Hellmund wrote forth saying...

> Then I came up with a solution where multicasting outside the private network
> ist not necessary: 
> 
> - install the web client on the web server, change "localhost" in
>   ganglia-rrd.pl and ganglia.php to the master node's name.
> - start gmond on the cluster nodes
> - start gmond on the master node with:
>     gmond -s 133.18.7.35 -i eth1

Perfect solution.  I should add something to the documentation so others 
don't have to work so hard to find it.  If you have any problems in the 
future, feel free to email me directly with questions (although I know the 
fun of figuring things out yourself too).

> It is fine, it works (see
> http://www.physik.uni-leipzig.de/Computer/ganglia/index.php), but some
> problems remain:
> 
>  -  gmetric does not work on the  master node since it has no -i option.  

It does now.  If you download and install the ganglia monitoring core 
version 2.1.1, you find gmetric supports multiple interfaces correctly 
now.  Download it from the ganglia web site at 
http://ganglia.sourceforge.net/ .  If you want to be emailed when a new 
version of ganglia is available, join the ganglia-announce mailing list at
http://lists.sourceforge.net/lists/listinfo/ganglia-announce .

>  -  How can I add clients from the  133.18.7.* network? 

Yes and No.  It's not pretty now.  In the future, I will add support for 
multiple simultaneous interface message processing.  For now...  you'll 
have to start a separate gmond process with the following options.

   ./gmond --xml_port 8650 --mcast_if eth1

You have to change the xml_port as to not conflict with the other gmond 
process listening to the private address space.

Connecting to port 8649 will show you data on eth0 and connecting to port 
8650 will show you data for the public address space.

Also, I know you are using the -s --safe_host option.. in version 2.1.1 
you need to change it to -t or --trusted_host (it does exactly the same 
thing but users found "safe_host" less descriptive than "trusted_host".

> Many thanks for a fine piece of software!

You're welcome.  It's always good to hear from ganglia users out there.

Good luck and congratulations to your country for doing such an 
outstanding job in the olympics!

-matt


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