added Environment variables

README.md

@@ -21,6 +21,23 @@ Go to the repository folder and launch the box
     $ cd [repo]
     $ vagrant up
 
+Environment variables
+-------------------------
+
+### Default values
+
+```bash
+VM_MEMORY=512
+VM_CORES=1
+VM_ARCH=32
+```
+
+### Examples uses
+
+```bash
+VM_MEMORY=1024 VM_CORES=2 VM_ARCH=64 vagrant up
+```
+
 What's inside:
 --------------
 

Vagrantfile

@@ -1,17 +1,21 @@
 # -*- mode: ruby -*-
 # vi: set ft=ruby :
 
+MEMORY = ENV['VM_MEMORY'] || '512'
+CORES = ENV['VM_CORES'] || '1'
+ARCH = ENV['VM_ARCH'] || '32'
+
 Vagrant.configure("2") do |config|
   # All Vagrant configuration is done here. The most common configuration
   # options are documented and commented below. For a complete reference,
   # please see the online documentation at vagrantup.com.
 
   # Every Vagrant virtual environment requires a box to build off of.
-  config.vm.box = "precise32"
+  config.vm.box = "precise#{ARCH}"
 
   # The url from where the 'config.vm.box' box will be fetched if it
   # doesn't already exist on the user's system.
-  config.vm.box_url = "http://files.vagrantup.com/precise32.box"
+  config.vm.box_url = "http://files.vagrantup.com/precise#{ARCH}.box"
 
   # Create a forwarded port mapping which allows access to a specific port
   # within the machine from a port on the host machine.
@@ -31,7 +35,12 @@ Vagrant.configure("2") do |config|
   # These expose provider-specific options.
   config.vm.provider :virtualbox do |vb|
     # Use VBoxManage to customize the VM. For example to change memory:
-    vb.customize ["modifyvm", :id, "--memory", "512"]
+    vb.customize ["modifyvm", :id, "--memory", MEMORY.to_i]
+    vb.customize ["modifyvm", :id, "--cpus", CORES.to_i]
+
+    if CORES.to_i > 1
+      vb.customize ["modifyvm", :id, "--ioapic", "on"]
+    end
   end
 
   # Enable provisioning with chef solo, specifying a cookbooks path, roles