Improve the configuration of the used base box

Change-Id: Ia89908fd8b0a003f2176bebdb1a04f682da723f6

Vagrantfile

@@ -20,19 +20,23 @@ unless defined? CONFIG
   CONFIG = YAML.load(File.open(configuration_file, File::RDONLY).read)
 end
 
+CONFIG['box'] = {} unless CONFIG.key?('box')
+CONFIG['box']['name'] = 'b1-systems/centos-packstack' unless CONFIG['box'].key?('name')
+CONFIG['box']['storage_controller'] = 'SATA Controller' unless CONFIG['box'].key?('storage_controller')
+
 def add_block_device(node, port, size)
   node.vm.provider 'virtualbox' do |vb|
     vb.customize ['createhd', '--filename', "#{node.vm.hostname}_#{port}.vdi",
                   '--size', size]
     vb.customize ['storageattach', :id, '--storagectl',
-                  CONFIG['box_storage_controller'], '--port', port,
+                  CONFIG['box']['storage_controller'], '--port', port,
                   '--device', 0, '--type', 'hdd', '--medium',
                   "#{node.vm.hostname}_#{port}.vdi"]
   end
 end
 
 Vagrant.configure(2) do |config|
-  config.vm.box = CONFIG['box']
+  config.vm.box = CONFIG['box']['name']
   config.vm.synced_folder '.', '/vagrant', disabled: true
   config.vm.provider 'virtualbox' do |vb|
     vb.customize ['modifyvm', :id, '--memory', CONFIG['resources']['memory']]

config.yaml.sample

@@ -1,6 +1,7 @@
 ---
-box: b1-systems/centos-packstack
-box_storage_controller: 'SATA Controller'
+box:
+  name: b1-systems/centos-packstack
+  storage_controller: 'SATA Controller'
 development: false
 bridge_internal: tap0
 bridge_external: tap1

doc/source/configuration.rst

@@ -12,7 +12,8 @@ CentOS. By default the box ``centos-packstack`` will be used.
 
 ::
 
-    box: b1-systems/centos-packstack
+    box:
+      name: b1-systems/centos-packstack
 
 ``centos-packstack`` is a customized version of
 `boxcutter/centos70 <https://github.com/box-cutter/centos-vm>`__. The
@@ -21,14 +22,20 @@ CentOS. By default the box ``centos-packstack`` will be used.
 repository and the box iself on
 `Atlas <https://atlas.hashicorp.com/b1-systems/centos-packstack>`__.
 
-To change the used base box modify the value of ``box``. A list
+To change the used base box modify the value of ``name``. A list
 of public available boxes is available on
 `Atlas <https://atlas.hashicorp.com/>`__.
 
 Depending on the used base box you have to set the used storage
-controller (normally ``IDE Controller`` or ``SATA Controller``). The
+controller (``SATA Controller`` by default). The
 storage controller of the used base box must support at least three ports.
 
+::
+
+    box:
+      name: b1-systems/centos-packstack
+      storage_controller: 'SATA Controller'
+
 
 Networking
 ----------