Expand Ubuntu partition inside VM

Feb 11, 2025

Increasing the size of disk from VM will create unpartitioned space. We need to manually allocate the space within the OS to fully utilize the storage.

Show disk device:

lsblk

Note the device name. Example is nvme0n1 given below.

NAME                      MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
sr0                        11:0    1 1024M  0 rom
nvme0n1                   259:0    0   60G  0 disk
├─nvme0n1p1               259:1    0  953M  0 part /boot/efi
├─nvme0n1p2               259:2    0  1.8G  0 part /boot
└─nvme0n1p3               259:3    0 XX.XG  0 part
  └─ubuntu--vg-ubuntu--lv 252:0    0 XX.XG  0 lvm  /

Show partition number:

sudo parted /dev/nvme0n1 print free

Note the partition number at the end.

Number  Start   End     Size    File system  Name  Flags
        17.4kB  1049kB  1031kB  Free Space
 1      1049kB  1000MB  999MB   fat32              boot, esp
 2      1000MB  2879MB  1879MB  ext4
 3      2879MB  XX.XGB  XX.XGB

Use the growpart to expand the logical space:

sudo growpart /dev/nvme0n1 3

Finally use the lvextend and resize2fs utility on ubuntu--vg-ubuntu--lv disk:

sudo lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
sudo resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv