vagrant 多个box的操作|共享目录失败

本来机器上已经有一个Ubuntu的box了，今天想在安装一个centos的box，结果还折腾了很长时间。

多个机器的命令

添加box的时候需要使用名称，一个的时候可以忽略名称

vagrant box add Ubuntu.box
多个的时候必须指定名称
vagrant box add centos CentOS-7-x86_64-Vagrant-1910_01.VirtualBox.box

init也一样，需要指定刚刚创建的名字

vagrant init centos

然后执行 up，竟然报错了

vagrant up centos
The machine with the name 'centos' was not found configured for
this Vagrant environment.

竟然没有发现 centos vagrant 环境。奇怪的事，明明是有的。后来查了下资料，需要做个名称定义

config.vm.define "centos"

看下我的 Vagrantfile 的完整内容

Vagrant.configure("2") do |config|
  config.vm.define "centos"
  config.vm.box = "centos"
  config.vm.box_url = "CentOS-7-x86_64-Vagrant-1910_01.VirtualBox.box"
end

然后按需执行

vagrant up centos
vagrant ssh centos

终于起来登录了。

无法共享目录

起来之后又有新新的问题了，无法共享目录。

Vagrant was unable to mount VirtualBox shared folders. This is usually
because the filesystem "vboxsf" is not available. This filesystem is
made available via the VirtualBox Guest Additions and kernel module.
Please verify that these guest additions are properly installed in the
guest. This is not a bug in Vagrant and is usually caused by a faulty
Vagrant box. For context, the command attempted was:

mount -t vboxsf -o uid=1000,gid=1000 home_vagrant /home/vagrant/

The error output from the command was:

/sbin/mount.vboxsf: mounting failed with the error: No such device

查了下资料，说是扩展的问题。执行下以下命令更新扩展就可以了, https://github.com/scotch-io/scotch-box/issues/296

vagrant plugin install vagrant-vbguest
vagrant vbguest

更新比较忙，还可能被墙。
更新完之后直接 reload就能看到共享目录了。