So expanding disks in Linux seems to be somewhat of a headache sometimes. The easiest method I have found is once you have increased the space via your hypervisor, you will need to expand the disk by booting into a live ISO and using the partition manager there. Once that is done, apply the changes, reboot and expand the drive from inside the OS.

You will want to use the below commands to find the name of the volume – 

fdisk -l
df -h

Afterwards, you can use the below command to add the newly added free space to your volume – 

lvextend -r -l +100%FREE  /dev/mapper/***VOLUMEGOESHERE***