proxmox extend disk

Hi, I am new to Proxmox and LVS, and I hope someone will be able to help. I run out of space, see below. NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 111.8G 0 disk ├─sda1 8:1 0 1007K 0 part ├─sda2...

I am unable to Enlarge the file system which is not configured as LVM. I am getting the below message while trying to do "resize2fs" resize2fs /dev/vda1 resize2fs 1.42.5 (29-Jul-2012) The filesystem is already 12563712 blocks long. Nothing to do! I am attaching detailed screen shot of disk...