Ruby`s stdlib provides an YAML module for data serialization. By using this module, we can create only one Vagrantfile which reads the configuration from YAML files. If you are thinking of build servers – so only YAML files are needed for generating complete environments.

Preconditions

• Vagrant installed

Preparation

# create new directory
$ mkdir ~/Projects/Tutorial && cd ~/Projects/Tutorial

# create new files
$ touch Vagrantfile && touch server-config.yml

# list available BaseBoxes (optional)
$ vagrant box list

# edit Vagrantfile
$ vim Vagrantfile

# edit server-config.yml
$ vim server-config.yml

# -*- mode: ruby -*-

require 'yaml'
servers = YAML.load_file('server-config.yml')
API_VERSION = "2"

Vagrant.configure(API_VERSION) do |config|

  servers.each do |servers|

    config.vm.define servers["name"] do |machine|

      machine.vm.box = servers["box"]
      machine.vm.network :forwarded_port, guest: 22, host: servers["ssh"], id: 'ssh'
      
      machine.vm.provider :virtualbox do |vb|
        vb.name = servers["name"]
        vb.memory = servers["memory"]
        vb.cpus = servers["cpus"]
      end

    end

  end

end

---
- name: box_centos7_a
  box: lupin/centos7
  ssh: 2221
  memory: 1024
  cpus: 2
- name: box_centos7_b
  box: lupin/centos7
  ssh: 2222
  memory: 1024
  cpus: 2

Usage

# start run
$ vagrant up

# check status
$ vagrant status

# SSH example
$ vagrant ssh [name]