Vagrant + Ansible using a single config file

main.yml

---

 - hosts: all
   become: yes
   become_method: sudo
   vars:
      # first load the yml file used by Vagrant
      cfg: "{{ lookup('file','vagrant_config.yml')|from_yaml }}"
      # extra_var passed by Vagrant and specified by the user in his environment
      mode: "{{ mode }}"
      server: "{{ server }}"
      # type of server read from the hash just loaded from the yml file
      server_type: "{{ cfg[mode][server]['roles'] }}"
      standalone: "{{ cfg[mode][server]['standalone']| bool }}"
   roles:
   - { role: common, tags: common }
   - { role: "{{server_type}}" }

vagrant_ansible.yml

---
single_sensu:
  server0:
    cpus: 1
    ip: "192.168.1.10"
    memory: 512
    name: sensu
    roles: monitoring
    standalone: true

single_vm_pod:
  server0:
    cpus: 1
    ip: "192.168.2.11"
    memory: 512
    name: broker
    roles: monitoring
  server1:
    cpus: 1
    ip: "192.168.2.12"
    memory: 512
    name: elk
    roles: monitoring

test_cluster:
  master:
    cpus: 1
    ip: "192.168.2.21"
    memory: 512
    name: the_boss
    roles: clustered
  slave1:
    cpus: 1
    ip: "192.168.2.22"
    memory: 512
    name: poor_slave
    roles: clustered

Vagrantfile

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

# the envionment variable 'mode' will select the type of deployment from the yml file

require 'yaml'
mode = ENV['mode']
puts ("mode selected: #{mode}")

box_details = YAML.load_file("vagrant_ansible.yml")
configs = box_details["#{mode}"]
#p configs

Vagrant.configure(2) do | config |

      configs.each do |node_id, box_config|
        config.vm.define node_id do |node|
          #puts "creating node: %s" % node_id
          node.vm.hostname = "#{node_id}.local"
          node.vm.box = 'bento/centos-6.7'
          node.vm.network 'private_network', ip: box_config['ip']
          node.vm.provider "virtualbox" do |v|
            v.name = box_config['name']
            v.customize ["modifyvm", :id, "--memory", box_config['memory']]
            v.customize ["modifyvm", :id, "--cpus", box_config['cpus']]
            v.customize ["modifyvm", :id, "--usb", 'off']
            v.customize ["modifyvm", :id, "--audio", 'none']
            v.customize ["modifyvm", :id, "--pagefusion", 'on']
            end
          end
          config.vm.provision :shell, :path => "bootstrap.sh"
                config.vm.provision "ansible_local" do |ansible|
                  ansible.playbook = "main.yml"
                  ansible.verbose = true
                  ansible.version = '2.2.0.0'
                  ansible.extra_vars = { server: node_id, mode: mode }
                end
         end
    end