vgextend localhost-vg /dev/sda3
lvextend -L+11776M /dev/localhost-vg/swap_1
lvextend -l +100%FREE /dev/localhost-vg/root
resize2fs -p /dev/mapper/localhost--vg-root
swapoff /dev/mapper/localhost--vg-swap_1
mkswap /dev/mapper/localhost--vg-swap_1
swapon /dev/mapper/localhost--vg-swap_1