Expand an existing Ubuntu LVM without creating additional partitions, or adding to LVM VGs:

1. Expand the physical device (VMware, HyperV, DD to a new physical device,  etc)
2. Use offline GParted cd to re size the extended partition on which LVM lives
3. In live OS, use parted “resizepart” to extend the logical partition inside of the previously re sized extended partition

   (parted) resizepart
   Partition number? 5
   End? [268GB]? 1099GB
   

4. reboot
5. use LVM to resize the PV:

   pvresize /dev/sda5

6. resize the filesystem in the LV:

   resize2fs

References:

• https://rbgeek.wordpress.com/2013/01/27/how-to-extend-the-root-partition-in-lvm/
• http://www.joomlaworks.net/blog/item/168-resizing-the-disk-space-on-ubuntu-server-vms-running-on-vmware-esxi-5