Vagrant “流浪者”；等待机器启动时超时。”；

我以前有一个vagrant 1.8.1和virtualbox 5.0.22的工作设置，但升级到vagrant 1.8.5和5.1.0后，我现在遇到了可怕的“等待机器启动时超时”

除了降级还有其他选择吗

全输出：

Bringing machine 'centos7' up with 'virtualbox' provider...
==> centos7: Importing base box 'centos/7'...
==> centos7: Matching MAC address for NAT networking...
==> centos7: Checking if box 'centos/7' is up to date...
==> centos7: Setting the name of the VM: centos7-openvpn
==> centos7: Clearing any previously set network interfaces...
==> centos7: Preparing network interfaces based on configuration...
    centos7: Adapter 1: nat
    centos7: Adapter 2: bridged
==> centos7: Forwarding ports...
    centos7: 22 (guest) => 2222 (host) (adapter 1)
==> centos7: Running 'pre-boot' VM customizations...
==> centos7: Booting VM...
==> centos7: Waiting for machine to boot. This may take a few minutes...
    centos7: SSH address: 127.0.0.1:2222
    centos7: SSH username: vagrant
    centos7: SSH auth method: private key
    centos7: Warning: Remote connection disconnect. Retrying...
    centos7:
    centos7: Vagrant insecure key detected. Vagrant will automatically replace
    centos7: this with a newly generated keypair for better security.
    centos7:
    centos7: Inserting generated public key within guest...
    centos7: Removing insecure key from the guest if it's present...
    centos7: Key inserted! Disconnecting and reconnecting using new SSH key...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
    centos7: Warning: Authentication failure. Retrying...
Timed out while waiting for the machine to boot. This means that
Vagrant was unable to communicate with the guest machine within
the configured ("config.vm.boot_timeout" value) time period.

If you look above, you should be able to see the error(s) that
Vagrant had when attempting to connect to the machine. These errors
are usually good hints as to what may be wrong.

If you're using a custom box, make sure that networking is properly
working and you're able to connect to the machine. It is a common
problem that networking isn't setup properly in these boxes.
Verify that authentication configurations are also setup properly,
as well.

If the box appears to be booting properly, you may want to increase
the timeout ("config.vm.boot_timeout") value.

这是由git中已经修复的bug引起的

您可以在等待新版本时自行应用修复程序，方法是编辑文件

vagrant/plugins/guests/linux/cap/public_key.rb

，并应用bug报告中描述的以下更改：

diff -uNr vagrant-original/plugins/guests/linux/cap/public_key.rb vagrant/plugins/guests/linux/cap/public_key.rb
--- vagrant-original/plugins/guests/linux/cap/public_key.rb     2016-07-19 12:06:56.575045974 -0500
+++ vagrant/plugins/guests/linux/cap/public_key.rb      2016-07-19 12:07:34.303376009 -0500
@@ -54,6 +54,7 @@
             if test -f ~/.ssh/authorized_keys; then
               grep -v -x -f '#{remote_path}' ~/.ssh/authorized_keys > ~/.ssh/authorized_keys.tmp
               mv ~/.ssh/authorized_keys.tmp ~/.ssh/authorized_keys
+              chmod 0600 ~/.ssh/authorized_keys
             fi

             rm -f '#{remote_path}'