author：headsen chen
date： 2019-03-18 15:24:22
自动化修改分区的脚本
umount /home
# 交互式执行shell命令
echo 'y' |lvremove /dev/mapper/centos-home
lvextend -L +140G /dev/mapper/centos-root
xfs_growfs /dev/mapper/centos-root
lvcreate -L 1G -n home centos
mkfs.xfs /dev/mapper/centos-home
mount /dev/mapper/centos-home /home
df -h # 必须是lvs的硬盘分区模式，centos-home 是lv的名称，centos是vg的名称，
1，查看
[root@localhost mnt]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/cl-root 50G 12G 39G 23% /
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 8.6M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/sda1 1014M 139M 876M 14% /boot
/dev/mapper/cl-home 66G 33M 66G 1% /home
tmpfs 378M 0 378M 0% /run/user/0 [root@localhost mnt]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
home cl -wi-a----- 65.12g
root cl -wi-ao---- 50.00g
swap cl -wi-ao---- 3.88g
卸载/home 分区
[root@localhost mnt]# umount /home
删除home的lv分区
[root@localhost mnt]# lvremove /dev/mapper/cl-home
Do you really want to remove active logical volume cl/home? [y/n]: y
Logical volume "home" successfully removed
增加root所在的 / 分区并更新文件系统
[root@localhost mnt]# lvextend -L +60G /dev/mapper/cl-root
Size of logical volume cl/root changed from 50.00 GiB (12800 extents) to 110.00 GiB (28160 extents).
Logical volume cl/root successfully resized. [root@localhost ~]# xfs_growfs /dev/mapper/cl-root
meta-data=/dev/mapper/cl-root isize=512 agcount=4, agsize=3276800 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=13107200, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=6400, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 13107200 to 28835840
创建/home分区，并设置大小为5G
[root@localhost mnt]# lvcreate -L 5G -n home cl
Logical volume "home" created. [root@localhost mnt]# mkfs.xfs /dev/mapper/cl-home
meta-data=/dev/mapper/cl-home isize=512 agcount=4, agsize=327680 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=1310720, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
挂载并查看
[root@localhost mnt]# mount /dev/mapper/cl-home /home
[root@localhost mnt]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/cl-root 110G 12G 99G 11% /
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 8.6M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/sda1 1014M 139M 876M 14% /boot
tmpfs 378M 0 378M 0% /run/user/0
/dev/mapper/cl-home 5.0G 33M 5.0G 1% /home