# add 20GB to VM ID 555
> qm resize 555 scsi0 +20G

# very dangerous fdisk command
> echo -e "d\n2\nn\np\n2\n\n\nt\n2\n8e\nw" \
  | /usr/sbin/fdisk /dev/sda

# apply free space to LVM
> pvresize /dev/sda2

# enlarge partition size
> lvextend -L +20G /dev/almalinux/var

# apply new partition size
> xfs_growfs /dev/almalinux/var