Cloning Compute Nodes

Assuming:

master is in sda

target is in sdb

dd if=/dev/sda of=/dev/sdb bs=32M

comment out entries in /etc/udev/rules.d/70-persistent-net.rules

Change hostname and IP of the master into the desired one.

Comment out HWADDR and UUID. 

Move sda to the new compute node.

Move sdb to sda of the original compute node.