2.2. On an Existing Server

The Ganglia Roll can be installed on running frontend.

The following procedure will install the roll on the frontend. After the frontend reboots, the roll will be fully configured.

First download the Ganglia Roll ISO from the Rocks web site. Then, as root, execute:

# rocks add roll ganglia*iso
# rocks enable roll ganglia
# cd /export/rocks/install
# rocks create distro
# rocks run roll ganglia | bash

Then reboot:

# init 6

To apply ganglia to the compute nodes, you will need to reinstall the compute nodes, e.g.:

# rocks set host boot compute action=install
# rocks run host compute command="reboot"