创建 PV : pvcreate /dev/sda1
创建VG: vgcreate centos /dev/sda1
扩展VG: vgextend centos /dev/sda2
创建LV: lvcreate -n home -L 5G centos
扩展LV: lvextend -l +100%FREE /dev/mapper/centos-home
XFS分区格式化：mkfs.xfs /dev/mapper/centos-home
EXT4分区格式化：mkfs.ext4 /dev/mapper/centos-home
扩展分区：
EXT4: resize2fs -p /dev/mapper/centos-home
XFS: xfs_growfs /dev/mapper/centos-home
