https://www.2daygeek.com/reduce-shrink-decrease-resize-lvm-logical-volume-in-linux/
https://www.2daygeek.com/linux-remove-delete-physical-volume-pv-from-volume-group-vg-in-lvm/
Add new disk lvm linux :
sudo pvcreate /dev/xvda4
sudo vgextend ubuntu-vg /dev/xvda4
sudo lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
sudo resize2fs /dev/ubuntu-vg/ubuntu-lv
Increase existing vm disk size lvm :
sudo fdisk -l
sudo parted /dev/xvda resizepart 4 100%
sudo pvresize /dev/xvda4
sudo lvresize -r -l +100%FREE /dev/ubuntu-vg/ubuntu-lv