Resizing Proxmox Ubuntu Instance

Select the VM to resize

Click on the Hardware tab

Click on the Hard Disk

Click on the Resize Disk button

Select how much (GB) you want to increase the disk space by.

Click on the Resize Disk button

reboot the VM

ssh onto the VM

List the current disks sudo fdisk -l /dev/sda

Identify the root partition, for example

In this case the root partition was /dev/sda3, now to resize run sudo growpart /dev/sda 3

Now reboot the VM

Once restarted, check the size of the disk with df -h

ssh onto the VM

Identify the root partition, and the partition number. superman@homeassistant:~$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS loop0 7:0 0 74M 1 loop /snap/core22/2339 loop2 7:2 0 63.8M 1 loop /snap/core20/2686 loop3 7:3 0 74M 1 loop /snap/core22/2292 loop4 7:4 0 71M 1 loop /snap/prometheus/86 loop5 7:5 0 50.9M 1 loop /snap/snapd/25577 loop6 7:6 0 48.1M 1 loop /snap/snapd/25935 loop7 7:7 0 63.8M 1 loop /snap/core20/2717 sda 8:0 0 45G 0 disk ├─sda1 8:1 0 1M 0 part ├─sda2 8:2 0 2G 0 part /boot └─sda3 8:3 0 28G 0 part └─ubuntu--vg-ubuntu--lv 252:0 0 28G 0 lvm /

sudo apt update sudo apt install cloud-guest-utils

Use growpart to resize the partition, in this case it's partition 3 on /dev/sda

sudo growpart /dev/sda 3

now resize the physical volume with pvresize.

sudo pvresize /dev/sda3

Now resize the logical volume, in this case it's called ubuntu-lv sudo lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv

Now resize the filesystem, in this case it's ext4 sudo resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv