how-to https://gist.github.com/gjrdiesel/4e93d8743b71babb58dcba4ee049247c
how-to-when-your-disk-has-already-full https://community.spiceworks.com/topic/2249940-lvm-expanding-gives-me-filesystem-in-use-error
https://forum.proxmox.com/threads/ubuntu-vm-wont-resize-lvm.87984/
sudo lvresize --extents +100%FREE --resizefs /dev/mapper/ubuntu--vg-ubuntu--lv