Vagrant1.5系にアップデートしたらNFSが使えなくなったよってお話

vagrantを1.5系に入れ直してvagrant upしたら変なエラーが・・・

$ vagrant up
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Clearing any previously set forwarded ports...
==> default: Fixed port collision for 22 => 2222. Now on port 2200.
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
    default: Adapter 1: nat
    default: Adapter 2: hostonly
==> default: Forwarding ports...
    default: 22 => 2200 (adapter 1)
==> default: Booting VM...
==> default: Waiting for machine to boot. This may take a few minutes...
    default: SSH address: 127.0.0.1:2200
    default: SSH username: vagrant
    default: SSH auth method: private key
    default: Error: Connection timeout. Retrying...
    default: Error: Remote connection disconnect. Retrying...
    default: Error: Remote connection disconnect. Retrying...
    default: Error: Remote connection disconnect. Retrying...
    default: Error: Remote connection disconnect. Retrying...
    default: Error: Remote connection disconnect. Retrying...
    default: Error: Remote connection disconnect. Retrying...
    default: Error: Remote connection disconnect. Retrying...
    default: Error: Remote connection disconnect. Retrying...
    default: Error: Remote connection disconnect. Retrying...
    default: Error: Remote connection disconnect. Retrying...
    default: Error: Remote connection disconnect. Retrying...
    default: Error: Remote connection disconnect. Retrying...
    default: Error: Remote connection disconnect. Retrying...
    default: Error: Remote connection disconnect. Retrying...
==> default: Machine booted and ready!
==> default: Checking for guest additions in VM...
    default: The guest additions on this VM do not match the installed version of
    default: VirtualBox! In most cases this is fine, but in rare cases it can
    default: prevent things such as shared folders from working properly. If you see
    default: shared folder errors, please make sure the guest additions within the
    default: virtual machine match the version of VirtualBox you have installed on
    default: your host and reload your VM.
    default:
    default: Guest Additions Version: 4.2.16
    default: VirtualBox Version: 4.3
==> default: Configuring and enabling network interfaces...
==> default: Exporting NFS shared folders...
NFS is reporting that your exports file is invalid. Vagrant does
this check before making any changes to the file. Please correct
the issues below and execute "vagrant reload":
...

どうやら/etc/exportsを削除しなきゃいけないらしい。

$ vagrant halt 
$ rm -rf /etc/exports #Remove the exports file. 
$ vagrant up

これで無事NFSが使えるようになりました。