故障
vagrant管理的centos虚拟机在做过 yum -y update 后更新了系统以及内核
然后下一次vagrant up的时候共享目录不能挂载到/vagrant目录( /sbin/mount.vboxsf: mounting failed with the error: No such device)
详细信息
Failed to mount folders in Linux guest. This is usually because the "vboxsf" file system is not available. Please verify that the guest additions are properly installed in the guest and can work properly. The command attempted was: mount -t vboxsf -o uid=`id -u vagrant`,gid=`getent group vagrant | cut -d: -f3` vagrant /vagrant mount -t vboxsf -o uid=`id -u vagrant`,gid=`id -g vagrant` vagrant /vagrant The error output from the last command was: /sbin/mount.vboxsf: mounting failed with the error: No such device
搜索资料知道原因是yum update更新了内核，但是没有更新VirtualBox的连接的问题。
需要执行
sudo /etc/init.d/vboxadd setup
修复即可