Setting up virtual cluster on a single machine via vagrant: http://blog.cloudera.com/blog/2013/04/how-to-use-vagrant-to-set-up-a-virtual-hadoop-cluster/

vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

$master_script = <<SCRIPT
#!/bin/bash
cat > /etc/hosts <<EOF
127.0.0.1       localhost

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

10.211.55.100   vm-cluster-node1
10.211.55.105   vm-cluster-client
EOF

apt-get install curl -y
REPOCM=${REPOCM:-cm4}
CM_REPO_HOST=${CM_REPO_HOST:-archive.cloudera.com}
CM_MAJOR_VERSION=$(echo $REPOCM | sed -e 's/cm\\([0-9]\\).*/\\1/')
CM_VERSION=$(echo $REPOCM | sed -e 's/cm\\([0-9][0-9]*\\)/\\1/')
OS_CODENAME=$(lsb_release -sc)
OS_DISTID=$(lsb_release -si | tr '[A-Z]' '[a-z]')
if [ $CM_MAJOR_VERSION -ge 4 ]; then
  cat > /etc/apt/sources.list.d/cloudera-$REPOCM.list <<EOF
deb [arch=amd64] http://$CM_REPO_HOST/cm$CM_MAJOR_VERSION/$OS_DISTID/$OS_CODENAME/amd64/cm $OS_CODENAME-$REPOCM contrib
deb-src http://$CM_REPO_HOST/cm$CM_MAJOR_VERSION/$OS_DISTID/$OS_CODENAME/amd64/cm $OS_CODENAME-$REPOCM contrib
EOF
curl -s http://$CM_REPO_HOST/cm$CM_MAJOR_VERSION/$OS_DISTID/$OS_CODENAME/amd64/cm/archive.key > key
apt-key add key
rm key
fi
apt-get update
export DEBIAN_FRONTEND=noninteractive
apt-get -q -y --force-yes install oracle-j2sdk1.6 cloudera-manager-server-db cloudera-manager-server cloudera-manager-daemons
service cloudera-scm-server-db initdb
service cloudera-scm-server-db start
service cloudera-scm-server start
SCRIPT

$slave_script = <<SCRIPT
cat > /etc/hosts <<EOF
127.0.0.1       localhost

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

10.211.55.100   vm-cluster-node1
10.211.55.105   vm-cluster-client
EOF
SCRIPT

$client_script = <<SCRIPT
cat > /etc/hosts <<EOF
127.0.0.1       localhost

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

10.211.55.100   vm-cluster-node1
10.211.55.105   vm-cluster-client
EOF
SCRIPT

Vagrant.configure("2") do |config|

  config.vm.define :master do |master|
    master.vm.box = "precise64"
    master.vm.provider "vmware_fusion" do |v|
      v.vmx["memsize"]  = "4096"
    end
    master.vm.provider :virtualbox do |v|
      v.name = "vm-cluster-node1"
      v.customize ["modifyvm", :id, "--memory", "4096"]
    end
    master.vm.network :private_network, ip: "10.211.55.100"
    master.vm.hostname = "vm-cluster-node1"
    master.vm.provision :shell, :inline => $master_script
  end


  config.vm.define :client do |client|
    client.vm.box = "precise64"
    client.vm.provider "vmware_fusion" do |v|
      v.vmx["memsize"]  = "4096"
    end
    client.vm.provider :virtualbox do |v|
      v.name = "vm-cluster-client"
      v.customize ["modifyvm", :id, "--memory", "4096"]
    end
    client.vm.network :private_network, ip: "10.211.55.105"
    client.vm.hostname = "vm-cluster-client"
    client.vm.provision :shell, :inline => $client_script
  end

end