Vagrant 1.4 发布了，包含很多新特性、bug 修复和改进，下载地址：http://www.vagrantup.com/downloads.html
Vagrant是一个基于Ruby的工具，用于创建和部署虚拟化开发环境。它 使用Oracle的开源VirtualBox虚拟化系统，使用 Chef 创建自动化虚拟环境。
该版本包含如下新特性：
New provisioner: Docker. Install Docker, pull containers, and run containers easier than ever.
Machine readable output. Vagrant now has machine-friendly output by using the --machine-readable flag.
New plugin type: synced folder implementation. This allows new ways of syncing folders to be added as plugins to Vagrant.
The Vagrant.require_version function can be used at the top of a Vagrantfile to enforce a minimum/maximum Vagrant version.
Adding boxes via vagrant box add and the Vagrantfile both support providing checksums of the box files.
The --debug flag can be specified on any command now to get debug-level log output to ease reporting bugs.
You can now specify a memory using vb.memory setting with VirtualBox.
Plugin developers can now hook into environment_plugins_loaded, which is executed after plugins are loaded but before Vagrantfiles are parsed.
VirtualBox internal networks are now supported. [GH-2020]
其他方面的改进和 bug 修复列表请看https://github.com/mitchellh/vagrant/blob/v1.4.0/CHANGELOG.md。此外，官方还发布了 Vagrant 1.5 的开发计划。
Vagrant 使用非常简单：
$ vagrant box add base http://files.vagrantup.com/precise32.box
$ vagrant init
$ vagrant up
来自:开源中国社区
