[SOLVED] /dev/centos/root does not exist after migrating CentOS7 from vmware to proxmox VE

[wong]

and imported this into proxmox VE. Upon booting I get the following errors:​

 

[ness1602]

Maybe you could reinitialize initramfs with dracut -f --regenerate-all if i'm not mistaken? You can do that with safe mode,or ISO.
Regards,

 

[wong]

This problem is solved by changing the hard disk mode of the VM through the web

 

[TheMrg]

same error. suddenly we yust reboot proxmox and than this error occurse.
what can we do?
centos7 rescue did not find any disk.
we move the disk to qcow2 format and mount it from the proxmox host (/var/liv/vz/....)...partitions are there and data are there.

btw:
many thanks
in rescue
blkid did not show the disks.

 

[TheMrg]

ok we change the type of SCSI Controler to LS and back to VirtIO, now with rescue boot we can do
vgchange -ay
but it says refusing activation of partial LV centos/root

reboot centos7 normal still hung on dracut with
/dev/centos/root not found

 

[TheMrg]

we got it:
we do
vgextend --restoremissing <volume group> <physical volume>
this works.
confusing because lvdisplay shows no missing PV

 

[StormFury]

vgextend --restoremissing <volume group> <physical volume>

@TheMrg I know this is a little old of a thread, but I am running into this same problem, and my CentOS7 machine boots and operates fine in recovery mode. I am trying to follow your solution here, but am hitting a wall. Can you provide more details on how you did this?

Here is the drive layout

sda
sda1 part /boot/efi
sda2 part /boot
sda3 part
centos-root lvm /
centos-swap lvm [SWAP]
centos-home lvm /home

Using the above, when you say <v_g> versus <p_v> are you referring to running the command like this:

vgextend --restoremissing sda1 sda

Or am i missing something?

 

[mmccarn]

This problem is solved by changing the hard disk mode of the VM through the web

In my case I did this:

* Change hard disk mode to IDE (SATA did not work)
* delete CDROM to avoid issues
* detach boot disk
* edit detached disk -> specify "IDE"
(System now boots)

* Login
* Install qemu-guest agent

yum install qemu-guest-agent

* Rebuild initramfs using this command (from https://endocs.ksyun.com/documents/5425)

mkinitrd -f --allow-missing \
--with=virtio_blk --preload=virtio_blk \
--with=virtio_pci --preload=virtio_pci \
--with=virtio_console --preload=virtio_console \
 /boot/initramfs-$(uname -r).img $(uname -r)

* Shutdown

* Edit VM Hardware
* Set SCSI controller to Virtio SCSI Single
* detach boot disk
* edit detached disk -> SCSI

The workstation now boots using the Virtio SCSI Single controller.

 

[envio99]

In my case I did this:

* Change hard disk mode to IDE (SATA did not work)
* delete CDROM to avoid issues
* detach boot disk
* edit detached disk -> specify "IDE"
(System now boots)

* Login
* Install qemu-guest agent

yum install qemu-guest-agent

* Rebuild initramfs using this command (from https://endocs.ksyun.com/documents/5425)

mkinitrd -f --allow-missing \
--with=virtio_blk --preload=virtio_blk \
--with=virtio_pci --preload=virtio_pci \
--with=virtio_console --preload=virtio_console \
 /boot/initramfs-$(uname -r).img $(uname -r)

* Shutdown

* Edit VM Hardware
* Set SCSI controller to Virtio SCSI Single
* detach boot disk
* edit detached disk -> SCSI

The workstation now boots using the Virtio SCSI Single controller.

Thank you , work on Centos 8 after moving from ESXi