step1
#fdisk /dev/sda
p
step2
d
2
step3
n
p
(default)
(default)
step4
t
2
8e
step5
#fdisk /dev/sda
p
step6
w
q
#reboot
step7
#pvresize /dev/sda2
step8
#vgdisplay
Mark the "Free PE / Size"
#lvdisplay
mark the "LV Name"
#pvdisplay
step9
#lvextend -l +{Free PE /Size} /dev/ol/root
step10
#lvdisplay
step11
#resize2fs /dev/ol/root
or
#xfs_growfs /dev/ol/root