vagrant-hadoop-cluster
Deploying hadoop in a virtualized cluster in simple steps
These are the files that support the blogpost http://cscarioni.blogspot.co.uk/2012/09/setting-up-hadoop-virtual-cluster-with.html
For using them.
Simply clone the repository, then
gem install vagrant
vagrant box add base-hadoop http://files.vagrantup.com/lucid64.box
Maybe generate your own ssh-keygen pair of keys.. and replace them in the files id_rsa and id_rsa.pub in the modules/hadoop/files directory. Or for testing copy the provided id_rsa and id_rsa.pub into your .ssh directory.
vagrant up
then
vagrant ssh master
cd /opt/hadoop-xxx/bin
./hadoop namenode -format
./start-all