256. Briefly: Setting up ganglia on a debian beowulf cluster

On all your nodes (e.g. using clusterssh):
sudo apt-get install ganglia-monitor

On your front node only:
sudo apt-get install ganglia-webfrontend
sudo cp /etc/ganglia-webfrontend/apache.conf /etc/apache2/sites-enabled/ganglia.conf
sudo service apache2 restart

Edit /etc/ganglia/gmetad.conf and at a minimum add

data_source "debiwolf" 10 beryllium tantalum boron neon

or

data_source "debiwolf" 10 192.168.1.1 192.168.1.131 192.168.1.150 192.168.1.120

You can also specify additional information

gridname "rupert"
authority "http://192.168.1.1/ganglia/"

Go to http://localhost/ganglia in your browser. If you get

There was an error collecting ganglia data (127.0.0.1:8652): fsockopen error: Connection refused

Then do
sudo service gmetad start

Otherwise you should see something like this:

On all your nodes:
You may want to do
sudo service ganglia-monitor restart

if some of your nodes aren't showing.

Customize:
Edit your /etc/ganglia/gmond.conf:

cluster {
        name = "Debiwolf"
        owner = "Me"
        latlong = "unspecified"
        url = "None"
}