扩容磁盘大小

cat>/root/non.txt<<EOF
n
p
3

Z
w
q
EOF
fdisk /dev/vda </root/non.txt
partprobe /dev/vda
pvcreate /dev/vda3
vgextend centos /dev/vda3
lvextend /dev/mapper/centos-root -l +100%free
xfs_growfs /dev/mapper/centos-root
df -H

1、查看分区

2、备份/home/分区

3、卸载分区

umount /home

fuser -km /home

4、删除/home所在的LV

lvremove /dev/mapper/centos-home

5、扩展/root所在的LV

lvextend -L +100G /dev/mapper/centos-root

6、扩展/root文件系统

xfs_growfs /dev/mapper/centos-root

7、重新创建/home lv

lvcreate -L 41G -n /dev/mapper/centos-home

8、创建文件系统

mkfs.xfs /dev/mapper/centos-home

9、挂载/home

mount /dev/mapper/centos-home

10、文件恢复

11、查看磁盘大小

df -H