[SOLVED] Unable to change Volume Group name

ddenial · 06-09-2020, 10:50 AM

Hello All

I want to change the name of the volume group from deb-vg to vgd. The OS is Debian 10 in the KVM Lab environment.

Settings before:

Code:

root@deb:~# vgs
  VG     #PV #LV #SN Attr   VSize  VFree
  deb-vg   1   2   0 wz--n- <9.76g    0 

root@deb:~# lvs
  LV     VG     Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root   deb-vg -wi-ao---- <8.76g                                                    
  swap_1 deb-vg -wi-ao----  1.00g                                                    

root@deb:~# cat /etc/fstab
/dev/mapper/deb--vg-root /               ext4    errors=remount-ro 0       1
UUID=3ddccc19-e6ab-40ba-8302-08e25e40227e /boot           ext2    defaults        0       2
/dev/mapper/deb--vg-swap_1 none            swap    sw              0       0

root@deb:~# cat /etc/initramfs-tools/conf.d/resume 
RESUME=/dev/mapper/deb--vg-swap_1

Following are the steps I did

Code:

root@deb:~# vgrename deb-vg vgd
  Volume group "deb-vg" successfully renamed to "vgd"

root@deb:~# vgs
  VG  #PV #LV #SN Attr   VSize  VFree
  vgd   1   2   0 wz--n- <9.76g    0 

root@deb:~# lvs
  LV     VG  Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root   vgd -wi-ao---- <8.76g                                                    
  swap_1 vgd -wi-ao----  1.00g                                        

root@deb:~# vim /etc/fstab
/dev/mapper/vgd-root /               ext4    errors=remount-ro 0       1
UUID=3ddccc19-e6ab-40ba-8302-08e25e40227e /boot           ext2    defaults        0       2
/dev/mapper/vgd-swap_1 none            swap    sw              0       0


root@deb:~# vim /etc/initramfs-tools/conf.d/resume 
RESUME=/dev/mapper/vgd-swap_1

root@deb:~# update-initramfs -u -k all
update-initramfs: Generating /boot/initrd.img-4.19.0-9-amd64

root@deb:~# update-grub2
/usr/sbin/grub-probe: error: failed to get canonical path of `/dev/mapper/deb--vg-root'.

I don't know from where the above error is coming. Then, when I reboot, I get stuck (screenshot attached).

What I'm doing wrong? How to properly rename VG?

Thanks

ddenial · 06-09-2020, 12:54 PM

Figured it out.

The following are the new steps I followed. Bold ones are the ones that I had missed earlier.

Run the command
# vgrename actualName NewName
Edit /boot/grub/grub.cfg and change all the entries with the new name.
Edit /etc/fstab and change all the entries with the new name.
Edit /etc/initramfs-tools/conf.d/resume and replace the old name with the new one.
Rebuild an initramfs:
# update-initramfs -u -k all
Reboot
Rebuild grub2
# update-grub2

Working fine now. Thanks.