CentOS7使用LVM缩减/home空间,扩大/空间【完美版】恢复/home的原内容
本帖最后由 bingyu 于 2024-11-4 15:53 编辑Linux下调整根目录和home目录的空间大小
https://blog.csdn.net/tingting0119/article/details/141161910
https://www.jianshu.com/p/2d7bc34a93c0
CentOS7使用LVM缩减/home空间,扩大/空间【完美版】
方法：
把/home里的内容备份，然后将/home文件系统所在的逻辑卷删除，扩大/文件系统。
新建/home，恢复/home的原内容
1、查看默认分区
# df -h
文件系统 容量已用可用 已用% 挂载点
devtmpfs 470M 0470M 0% /dev
tmpfs 487M 0487M 0% /dev/shm
tmpfs 487M8.3M478M 2% /run
tmpfs 487M 0487M 0% /sys/fs/cgroup
/dev/mapper/centos_server-root 50G4.2G 46G 9% /
/dev/sda1 1014M172M843M 17% /boot
/dev/mapper/centos_server-home 47G 33M 47G 1% /home
tmpfs 98M8.0K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/0
#
可以看到两个lvs
/dev/mapper/centos_server-root 对应/
/dev/mapper/centos_server-home 对应/home
2、查看卷组信息
# pvs
PV VG FmtAttr PSize PFree
/dev/sda2centos_server lvm2 a--<99.00g 4.00m
# vgs
VG #PV #LV #SN Attr VSize VFree
centos_server 1 3 0 wz--n- <99.00g 4.00m
# lvs
LV VG Attr LSizePool Origin Data%Meta%Move Log Cpy%Sync Convert
home centos_server -wi-ao---- 46.99g
root centos_server -wi-ao---- 50.00g
swap centos_server -wi-ao----2.00g
#
3、把/home内容备份，#备份/home
# tar cvf /tmp/home.tar /home
tar: 从成员名中删除开头的“/”
/home/
/home/admin/
/home/admin/.mozilla/
/home/admin/.mozilla/extensions/
/home/admin/.mozilla/plugins/
/home/admin/.bash_logout
/home/admin/.bash_profile
/home/admin/.bashrc
#
4、然后将/home文件系统所在的逻辑卷删除
#卸载/home，如果无法卸载，先终止使用/home文件系统的进程
# umount /home
umount: /home：目标忙。
(有些情况下通过 lsof(8) 或 fuser(1) 可以
找到有关使用该设备的进程的有用信息)
#
# fuser -km /home
/home: 1527
#
然后继续卸载
# umount /home
#
5、#删除/home所在的lv逻辑卷
# lvremove /dev/mapper/centos_server-home
Do you really want to remove active logical volume centos_server/home? : y
Logical volume "home" successfully removed
#
6、扩大/文件系统
#扩展/所在的lv，增长10G
# lvextend -L +10G /dev/mapper/centos_server-root
Size of logical volume centos_server/root changed from 50.00 GiB (12800 extents) to 60.00 GiB (15360 extents).
Logical volume centos_server/root successfully resized.
#
7、#扩展/文件系统
# xfs_growfs /dev/mapper/centos_server-root
meta-data=/dev/mapper/centos_server-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 15728640
#
8、重新创建/home，使用剩余空间创建新的home
#从新建立home逻辑卷
# lvcreate -L 30G -n /dev/mapper/centos_server-home
Logical volume "home" created.
#
9、#建立文件系统
# mkfs.xfs /dev/mapper/centos_server-home
meta-data=/dev/mapper/centos_server-home isize=512 agcount=4, agsize=1966080 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=7864320, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=3840, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
#
#挂载
# mount /dev/mapper/centos_server-home /home
#
10、查看
# df -h
文件系统 容量已用可用 已用% 挂载点
devtmpfs 470M 0470M 0% /dev
tmpfs 487M 0487M 0% /dev/shm
tmpfs 487M8.3M478M 2% /run
tmpfs 487M 0487M 0% /sys/fs/cgroup
/dev/mapper/centos_server-root 60G4.2G 56G 7% /
/dev/sda1 1014M172M843M 17% /boot
tmpfs 98M 12K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/0
/dev/mapper/centos_server-home 30G 33M 30G 1% /home
#
11、文件恢复
# tar xvf /tmp/home.tar -C /
home/
home/admin/
home/admin/.mozilla/
home/admin/.mozilla/extensions/
home/admin/.mozilla/plugins/
home/admin/.bash_logout
home/admin/.bash_profile
home/admin/.bashrc
# ls
admin
#
12、查看卷组信息
# pvs
PV VG FmtAttr PSize PFree
/dev/sda2centos_server lvm2 a--<99.00g <7.00g
# vgs
VG #PV #LV #SN Attr VSize VFree
centos_server 1 3 0 wz--n- <99.00g <7.00g
# lvs
LV VG Attr LSizePool Origin Data%Meta%Move Log Cpy%Sync Convert
home centos_server-wi-ao---- 30.00g -->已缩减的分区大小
root centos_server -wi-ao---- 60.00g -->已扩展的分区大小
swap centos_server-wi-ao----2.00g
#
本文来自博客园，作者：花之旭，转载请注明原文链接：https://www.cnblogs.com/huazhixu/p/15777974.html
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