LVM: Rename root VG/LV

LVM: Rename root VG/LV


# Tested on RHEL 6 & 7


# Carry out planned modifications: renaming the existing Volume Group and/or renaming
# the Logical Volume(s). I just wanted to change the name of all LVs belonging to rootvg:

lvs
  LV   VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  home rootvg -wi-ao---- 512.00m
  opt  rootvg -wi-ao----   1.00g
  root rootvg -wi-ao----   1.00g
  swap rootvg -wi-ao----   1.00g
  tmp  rootvg -wi-ao----   1.00g
  usr  rootvg -wi-ao----   1.00g
  var  rootvg -wi-ao----   1.00g


lvrename /dev/rootvg/home  lv_home
lvrename /dev/rootvg/opt lv_opt
[...]
lvrename /dev/rootvg/usr  lv_usr
lvrename /dev/rootvg/var  lv_var


# Update /etc/fstab with the new names

vi /etc/fstab

   /dev/mapper/rootvg-lv_root                  /       ext4   defaults   1 1
   /dev/mapper/rootvg-lv_swap                  swap    swap   defaults   0 0
   [...]

# and then...



# RHEL 6 -----------------------------------------------------------------------------------

# Update VG/LV names in /boot/grub/grub.conf

vi /boot/grub/grub.conf
   [...]
   kernel /vmlinuz-2.6.32-358.el6.i686 ro root=/dev/mapper/rootvg-lv_root rd_NO_LUKS [...]

shutdown -r now



# RHEL 7 -----------------------------------------------------------------------------------

# Update VG/LV names in /etc/default/grub

vi /etc/default/grub
   [...]
   GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=rootvg/lv_root rd.lvm.lv=rootvg/lv_swap rd.lvm.lv=rootvg/lv_usr rhgb quiet"
   [...]

# Then reboot the system to rescue mode (I used a RHEL 7 rescue cd, option "find Linux
# installation and mount under /mnt/sysimage") and rebuild grub2 using following procedure:

# vgchange -ay rootvg
# mount /dev/sda1 /mnt/sysimage/boot
# mount /dev/rootvg/lv_usr /mnt/sysimage/usr

chroot /mnt/sysimage
grub2-mkconfig -o /boot/grub2/grub2.cfg


exit
shutdown -r now
0 (0)
Article Rating (No Votes)
Rate this article
Attachments
There are no attachments for this article.
Comments
There are no comments for this article. Be the first to post a comment.
Full Name
Email Address
Security Code Security Code
Related Articles RSS Feed
10 Linux rsync Examples to Exclude Files/Directories
Viewed 740 times since Wed, Oct 31, 2018
Linux - Cannot login from remote console but can access via ssh
Viewed 2143 times since Fri, Jun 8, 2018
RHEL: Extending the maximum inode count on a ext2/ext3/ext4 filesystem
Viewed 1320 times since Sun, May 27, 2018
Automatic YUM Updates with Yum-cron
Viewed 650 times since Fri, Oct 26, 2018
Secure Remote Logging to Central Log Server Using RSYSLOG on CentOS 6 / CentOS 7 and stunnel
Viewed 451 times since Sun, Dec 6, 2020
How log rotation works with logrotate
Viewed 1939 times since Fri, Nov 30, 2018
OEL 7 – How to disable IPv6 on Oracle Linux 7
Viewed 7561 times since Fri, Aug 3, 2018
Linux Health Check Commands
Viewed 712 times since Fri, Jun 8, 2018
Linux Cluster Tutorial
Viewed 646 times since Sat, Sep 29, 2018
Moving SSL Certificate from IIS to Apache
Viewed 632 times since Mon, Feb 18, 2019