HOW To Extend Linux Disks With LVM ?

1- see partion in linux with lsblk
for example : 
sda               8:0    0   70G  0 disk
├─sda1            8:1    0  200M  0 part /boot/efi
├─sda2            8:2    0  500M  0 part /boot
├─sda3            8:3    0 49.3G  0 part
│ ├─SddRh8-root 253:0    0 20.3G  0 lvm  /
│ ├─SddRh8-swap 253:1    0    4G  0 lvm  [SWAP]
│ ├─SddRh8-home 253:2    0   10G  0 lvm  /home
│ ├─SddRh8-tmp  253:3    0    5G  0 lvm  /tmp
│ └─SddRh8-var  253:4    0   30G  0 lvm  /var
└─sda4            8:4    0   20G  0 part
  └─SddRh8-var  253:4    0   30G  0 lvm  /var
sdb               8:16   0   60G  0 disk
sdc               8:32   0   20G  0 disk
sr0              11:0    1 1024M  0 rom

2- increase hard partion in vcenter (sda1)

echo 1 > /sys/class/block/sda/device/rescan

3- now should use fdisk to create pv 
#sudo fdisk /dev/sda
n
p
number 4 (for being sda4)
t
31
w

4-create pv:
sudo pvcreate /dev/sda4

5-extend vg
sudo vgextend SddRh8 /dev/sda4

6-extend lv
lvextend -l +100%FREE /dev/SddRh8/var

7- see status
df -h
sudo lvdisplay

8-resize formatted lv
sudo xfs_growfs /dev/mapper/SddRh8-var