Multiple Machine configuration in Vagrant

Vagrantfile

Vagrant.configure("2") do |config|
    (0..10).each do |idx|
      config.vm.define ("node-#{idx}")  do |web|
        web.vm.box = "ubuntu/trusty64"
        web.vm.hostname = "node-#{idx}"
        web.vm.box_url = "ubuntu/precise64"

        web.vm.provider :virtualbox do |v|
          v.customize ["modifyvm", :id, "--memory", 1024]
        end
      end
    end
end