Windows7下Vagrant 啓動失敗的問題：lib/vagrant/util/io.rb

最近vagrant不知道什麼緣由沒法啓動，日誌以下：

Bringing machine 'default' up with 'virtualbox' provider...
/Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/io.rb:32:in `encode': "x8B" followed by "x02" on GBK (Encoding::InvalidByteSequenceError)

from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/io.rb:32:in `read_until_block'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/subprocess.rb:194:in `block in execute'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/subprocess.rb:192:in `each'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/subprocess.rb:192:in `execute'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/subprocess.rb:22:in `execute'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/powershell.rb:174:in `version'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/powershell.rb:195:in `validate_install!'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/powershell.rb:96:in `execute_cmd'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/platform.rb:145:in `block (2 levels) in windows_hyperv_enabled?'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/platform.rb:142:in `each'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/platform.rb:142:in `block in windows_hyperv_enabled?'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/platform.rb:153:in `windows_hyperv_enabled?'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/plugins/providers/virtualbox/action/check_virtualbox.rb:19:in `call'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/action/warden.rb:34:in `call'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/action/builder.rb:116:in `call'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/action/runner.rb:66:in `block in run'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/util/busy.rb:19:in `busy'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/action/runner.rb:66:in `run'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/machine.rb:239:in `action_raw'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/machine.rb:208:in `block in action'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/environment.rb:614:in `lock'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/machine.rb:194:in `call'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/machine.rb:194:in `action'
    from /Vagrant/embedded/gems/2.2.1/gems/vagrant-2.2.1/lib/vagrant/batch_action.rb:82:in `block (2 levels) in run'

參考了兩篇網上找到文章，沒法解決問題

1 日文網站的解決方案（**認爲是編碼問題**）：https://github.com/NetCommons3/NetCommons3/issues/50
        対策
        「C:\opscode\chefdk\bin\berks」 を開き、3行目に
        Encoding.default_external = 'utf-8'
 2 laravel-china上的一篇文章（**認爲是中文問題**），很類似，但是問題緣由不一樣。但也給瞭解決思路
        https://laravel-china.org/articles/4082/a-wonderful-problem-encountered-in-the-use-of-vagrant

隨後本身仔細看了下ruby的日誌及相關源碼，發現裏面描述了powershell的問題，因而嘗試啓動windows的powershell果真是啓動失敗。
這樣的話問題就好說了，解決了powershell的問題就好了。（是.netFramework的問題，原來是本身以前因爲visio安裝不上，升級了.netFramework）。降級.netFramework便可

以後Vagrant啓動正常

總結：遇到問題注意看日誌，儘管是本身不熟悉的語言。

文章結尾奶一下ruby：

借用《Programming Ruby》推薦序中的一段話：

事實上，執行性能與開發效率是軟件開發中的一對矛盾，全部的程序設計語言都必須面對這個矛盾，做出本身的選擇。 
　　
在當時，大多數新語言的選擇是上下通吃。它們一方面提供了豐富多彩的高級抽象，另外一方面又提供了強有力的底層操做能力，但願由此實現高性能與高效率的統一。
C++、Java、C#和Delphi都是走的這條路線，甚至VB從5.0開始也強化了底層操做機制，並提供了編譯模型，不落人後。 
　　
Ruby實現了最純粹意義上的面向對象，讓Smalltalk、Perl和Lisp的靈魂在新的軀殼裏高歌。
相比於Python，Ruby的思想更加清晰一致，形式更加靈活；
相比於Perl，Ruby更簡單質樸，絕少光怪陸離之舉；
相比於Smalltalk和Lisp，Ruby更富有現代感和實幹氣質；
相比於廟堂之上的「工業語言」，Ruby自由揮灑、輕快銳利；
而相比於JavaScript和PHP，Ruby從Smalltalk繼承而來的深厚底蘊又大佔優點。

面對執行性能與開發效率的謎題，Ruby堅決果斷地選擇了開發效率，選擇了對人腦的友好。

Created by suyaqiang (sueeing@126.com) on 2019/1/20.