Centos7 虚拟机环境下断电后进入dracut模式_/dev/mapper/centos-root does not exist

Vmware虚拟机环境下的Centos7，系统掉电后，无法重启，直接进入的dracut。因匆忙之中，没有来得及抓图。但记得系统提示：
Warning: /dev/centos/root does not exist
Warning: /dev/centos/swap does not exist
Warning: /dev/mapper/centos-root does not exist
然后就是提示输入journalctl查看日志。日志中主要内容也是提示以上三问题。
尝试安装盘启动恢复，提示无法找到任何linux分区。
按照https://blog.csdn.net/weixin_43905458/article/details/104059550的方法修复，在/dev目录中，找不到centos。
无奈用英文搜索，终于找到一篇文章：https://unix.stackexchange.com/questions/425045/warning-dev-centos-root-swap-centos-root-does-not-exist-after-configuring-dr
按照他的做法：

$ lvm vgscan
$ lvm vgchange -ay 
$ exit
1
2

系统引导成功！但文章说，重启后依然会失败。本人菜鸟，不明缘由。
幸好后面提供了解决方法，但我想先凑活着用，就没有敢尝试。希望高手验证。
恐网站无法访问，把解决办法转贴，共大家参考。
The reason why you’re seeing this is due of initramfs kernel image being build for the specific system it’s running on, so migrating to a new hardware will cause it to fail to boot.
Rebuilding initramfs in emergency mode(or go to the Rescue Mode ):
Then

1. List the initramfs images you have:

 ls -ltrh /boot/initramfs-*

2. Locate the kernel version you’re using and create a backup of it:

  cp -iv /boot/initramfs-3.10.0-1062.el7.x86_64.img /boot/initramfs-3.10.0-1062.el7.x86_64.img.back

3. Rebuild the kernel image for that specific kernel

  dracut -f

4. Select the new kernel image

  ls -ltrh /boot/initramfs-*

5. Specify the new kernel version (For Example):

  dracut -f  /boot/initramfs-3.10.0-1062.el7.x86_64.img 3.10.0-1062.el7.x86_64

6. Go to the Grub config

  vim /boot/grub2/grub

7. Delete the old menuentry and make sure that the new menuentry is top of all
8. Generate a GRUB configuration file

grub-mkconfig

9. Reboot
10. Done.