How to extend LVM Logical Volume

Posted on Jul 4, 2024

Overview

Physical Volume (PV) - This is the same as physical disks.
Physical Extent (PE) - This is a small chunk of equal size. When we combine it, it makes physical volumes, which are called Physical Extents.
Volume Group (VG) - A volume group simply combines all the physical extents of all the physical volumes to form one large logical volume group.
Logical Volume (LV) - The volume group, which is a pool of disk space, by combining all physical extents of all the physical volumes. You can make partitions according to need from volume group by creating logical volumes.

pv -> gv -> lv -> fs

Demo

df -h
lsblk -f

sudo fdisk /dev/sdb

# add a new partition
n
# primary partition type
p
<Enter>
<Enter>
<Enter>
#change a partition type
t
# LVM type
8e
# print the partition table
p
# write table to disk and exit
w

Check:

sudo fdisk -l

PV (Physical Volume) Part

sudo pvdisplay
sudo pvcreate /dev/sdb1
sudo pvdisplay

VG (Volume Group) Part

Check VG Name:

sudo vgdisplay | grep -i "vg name"
  VG Name               ubuntu-vg

sudo vgextend <VG Name> /dev/sdb1
sudo vgdisplay

LV (Logical Volume) Part

Check LV Path:

sudo lvdisplay | grep -i "lv path"
  LV Path                /dev/ubuntu-vg/ubuntu-lv

sudo lvextend -l +100%FREE <LV Path>
sudo lvdisplay
sudo resize2fs <LV Path>
sudo lvdisplay

Check:

df -h