Centos7 Vagrantfile with disk creation

Vagrantfile

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

boxes = [
    {
        :name => "node01.local",
        :eth  => "192.168.10.10",
        :mem  => "2048",
        :cpu  => "2"
    },
    {
        :name => "node02.local",
        :eth  => "192.168.10.11",
        :mem  => "2048",
        :cpu  => "2"
    },
    {
        :name => "node03.local",
        :eth  => "192.168.10.12",
        :mem  => "2048",
        :cpu  => "2"
    }
]

Vagrant.configure("2") do |config|
  config.vm.box = "centos/7"
  boxes.each_with_index do |opts,index|
    config.vm.define opts[:name] do |config|
      config.vm.hostname = opts[:name]
      config.ssh.private_key_path = ["default_key", "~/.vagrant.d/insecure_private_key"]
      config.vm.provision "file", source: "default_key.pub", destination: "~/.ssh/authorized_keys"
      config.ssh.insert_key = false
      config.vm.network "private_network", ip: opts[:eth]
      config.vm.provider "virtualbox" do |vb|
        vb.name   = opts[:name]
        vb.memory = opts[:mem]
        vb.cpus   = opts[:cpu]
        # Create a secondary disk
        disk_file = ".vagrant/machines/#{vb.name}/disk.vdi"
        vb.customize ['createhd', '--filename', disk_file, '--size', 10 * 1024] unless File.exist?(disk_file)
        vb.customize ['storageattach', :id, '--storagectl', 'IDE', '--port', 1, '--device', 0, '--type', 'hdd', '--medium', disk_file]
      end
      # Disable SELINUX
      config.vm.provision "shell", inline: <<-SHELL
       sudo setenforce 0
       sudo sed -i 's/SELINUX=\(enforcing\|permissive\)/SELINUX=disabled/g' /etc/selinux/config
      SHELL
    end
  end
end