Modification of the vagrantfile to automatically deploy instances fast

Vagrantfile

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

require 'ipaddr'

# Vagrantfile API/syntax version. Don't touch unless you know what you're doing!
VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|

  # Box configuration
  config.vm.box = "ubuntu/trusty64"

  # Puppet Agent configuration - setting master server
  #config.vm.provision "puppet_server" do |puppet|
  #  puppet.puppet_server = "puppet.example.com" 
  #  puppet.options = "--verbose --debug"
  #end 

  node_groups = [ 
    # Node group definitions
    # A ':machine' number is added to each machine's ':name'
    { 
      :name => "node",         # hostname for the machines
      :machines => 2,          # number of machines to be created
      :ssh_port_start => 2000, # a start port to forward ssh to the host machine
      :ip_network => "10.0.2.0/24" # network range for the group
    },
  ]

  # DO NOT MODIFY BELOW

  node_groups.each do |node_group| 

    ip_range = IPAddr.new(node_group[:ip_network]).to_range.to_a[2..-1] # available ip address range,
                                                                        # excluding the first and last usable
    node_group[:machines].times do |machine_number|
      machine_number+=1   # so it starts from 1, instead of 0
      node_name = "#{node_group[:name]}#{machine_number}"
      config.vm.define "#{node_name}" do |node|
        node.vm.hostname=node_name
        # disabling default port forwarding for ssh
        node.vm.network :forwarded_port, guest: 22, host: 2200, id: "ssh", disabled: "true"
        # assigning new port to forward for ssh
        node.vm.network :forwarded_port, guest: 22, host: node_group[:ssh_port_start] + machine_number
        node.vm.network "private_network", ip: ip_range.shift.to_s # return ip from pool and delete it from array
        node.vm.provision :hosts do |hosts|
          hosts.autoconfigure = true
          #hosts.add_host "10.0.2.2", ["puppet"]
        end
        node.vm.provider "virtualbox" do |v|
          v.name = node_name
          v.memory = 256  # allocate RAM in MB
          v.cpus = 2      # number of CPU cores to use
        end
      end
    end
  end

end