Vagrant multiple machine

Vagrantfile

$script = <<SCRIPT
  echo "Installing python..."
  apt-get update
  apt-get install -y python-minimal
SCRIPT

SPECIALS = {
  "master" => { :ip => "192.168.99.100", :ram => 1024 },
  "hiddensecondary" => { :ip => "192.168.99.101", :ram => 512 }
}

NODES_COUNT = 2

Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/xenial64"

  # Common provission, applied to all machines
  config.vm.provision "shell", inline: $script

  SPECIALS.each_with_index do |(hostname, attributes), index|
    config.vm.define hostname do |nodeconfig|
      nodeconfig.vm.hostname = hostname
      nodeconfig.vm.network :private_network, ip: attributes[:ip]
      nodeconfig.vm.provider "virtualbox" do |vb|
        vb.memory = attributes[:ram]
      end
    end
  end

  (1..NODES_COUNT).each do |i|
    config.vm.define "node-#{i}" do |node|
      node.vm.network "private_network", ip: "192.168.99.1#{i}"
      node.vm.hostname = "node#{i}"
      node.vm.provider "virtualbox" do |vb|
        vb.memory = "512"
      end
    end
  end
end

❯ vagrant status
Current machine states:

master                    running (virtualbox)
hiddensecondary           running (virtualbox)
node-1                    running (virtualbox)
node-2                    running (virtualbox)

This environment represents multiple VMs. The VMs are all listed
above with their current state. For more information about a specific
VM, run `vagrant status NAME`.