Increase a disk in XCP-ng - OS UBUNTU

Only works if Ubuntu is setup to use LVM!

Steps to follow:

1. Stop the running VM from within the VM.
2. Go into Xen Orchestra and increase disk size of the running VM.
3. Start the VM again.
4. Check partitions: sudo lsblk
5. Grow the relevant partition: sudo growpart /dev/xvda 1
6. Check again: sudo lsblk
7. fdisk -l
8. pvresize /dev/xvda1
9. lvdisplay
10. lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
11. resize2fs /dev/ubuntu-vg/ubuntu-lv
12. final check df -h

Useful links:

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/recognize-expanded-volume-linux.html
https://carleton.ca/scs/2019/extend-lvm-disk-space/