Proxmox – Increase LV disk size

First increase your disk size in the GUI of proxmox

Then open the terminal of your virtual machine and use following commands to extend your disk as super user (sudo)

lvdisplay

note your LV Path: /dev/{volume group name}

parted /dev/sda
   print and fix
   quit

pvresize /dev/sda3

lvextend -l +100%FREE /dev/{volume group name}

resize2fs /dev/{volume group name}

Now use the next command to see if your LV path has increased with the free space available

df -h