O Vagrant não guarda nenhum registro. A saída de, por exemplo, vagrant up --debug , pode ser redirecionada para um arquivo como
vagrant up --provision --debug &> debug_log
Fragmento de uma sessão de IRC em #vagrant na Freenode:
[18:29]
<NikosA>ada: really, where is the debug "file" stored, by default? Isn't there any?[18:29]
<ada>vagrant does not write to log files
..
[18:29]
<ada>virtualbox does[18:29]
<NikosA>I am even trying to >> debug_log in the command line, and it simply does not keep any of these valuable details.[18:29]
<NikosA>ok, so I'd check for the VBox logs?[18:30]
<ada>if you're using the vbox provider, yes
..
[18:31]
<dtrainor>NikosA, redirect the output with &>