This is probably much less a virtualization question that an LVM question. However, I'm not sure where to ask LVM questions, and it's hypervisors that are giving me problems.

I frequently have to move virtual appliances made in VirtualBox over to KVM or Xen. When I move the disk image over and boot the box, hard drive entries like /dev/sda or /dev/hda become /dev/vda or /dev/xda. Most often the system simply detects the changes and boots. Starting with the more recent Fedoras this has become a little painful, as I always end up neededing to regenerate an initramfs with dracut.

Yesterday I got a VM from one of the more junior sys admins. It was his first time using CentOS 7, and left LVM turned on. After fiddiling with migrating the VM for a while I can get it to book just fine in dracut resuce mode, but not in standard mode with a standard kernel.

It would certianly be more efficient to redo the VM without LVM, but I really want to know how to fix it. I assume I just need to update the mapping in LVM, but haven't found a reasonable tutorial just searching the net.

Here's my error message:

[ OK ] Reached target Paths.
[ OK ] Reached target Basic System.
Starting File System Check on /dev/mapper/centos-root...
systemd-fsck[288]: fsck: error 2 (No such file or directory) while executing fsck.ext2 for /dev/mapper/centos-root
[ OK ] Started File System Check on /dev/mapper/centos-root
dracut-initqueue[250]: Warning: Could not boot
dracut-initqueue[250]: Warning: /dev/centos/root does not exist
dracut-initqueue[250]: Warning: /dev/centos/swap does not exist
dracut-initqueue[250]: Warning: /dev/mapper/centos-root does not exist
Starting Dracut Emergency Shell...
Warning: /dev/centos/root does not exist
Warning: /dev/centos/swap does not exist
Warning: /dev/mapper/centos-root does not exist

Generating "/run/initramfs/rdsosreport.txt"

Can you share the contents of the sosreport? I don't see this error anywhere.