The backup GPT table is not on the end of the device. This problem will be corrected by write.
扩展ubuntu--vg-ubuntu--lv
废话不多说，直接上命令
Linux磁盘LVM根目录扩容
# fdisk /dev/sda
n
p
w
扩展pv并查看
# pvcreate /dev/sda4
# pvdisplay
扩展vg并查看
# vgextend ubuntu-vg /dev/sda4
# vgdisplay
扩展lv并查看
# lvextend /dev/ubuntu-vg/ubuntu-lv /dev/sda4
# lvdisplay
扩展根文件系统
# resize2fs /dev/ubuntu-vg/ubuntu-lv
# lblk