本文主要是介绍Centos7 将home空间分配给根目录（/dev/centos/root），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
1、查看目录结构
[root@localhost opt]# df -hl
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 7.7G 0 7.7G 0% /dev
tmpfs 7.7G 0 7.7G 0% /dev/shm
tmpfs 7.7G 18M 7.7G 1% /run
tmpfs 7.7G 0 7.7G 0% /sys/fs/cgroup
/dev/mapper/centos-root 50G 39G 12G 78% /
/dev/sda2 1014M 176M 839M 18% /boot
/dev/sda1 200M 12M 189M 6% /boot/efi
/dev/mapper/centos-home 180G 33M 180G 1% /home
tmpfs 1.6G 0 1.6G 0% /run/user/0
overlay 50G 39G 12G 78% /var/lib/docker/overlay2/b13ed87897fe1cabe547341e9a855c43bf04fcf7f3ef44e41138b08e62fb6191/merged
overlay 50G 39G 12G 78% /var/lib/docker/overlay2/502140d31ceae249f65f90e2fc096af6d8cece5f086ab9ce7e01ff80ec82576d/merged
overlay 50G 39G 12G 78% /var/lib/docker/overlay2/b8bfb2a4f4360f9b3915452fb4303d5ebf02299bee754de9d7245b5efc0d8149/merged
overlay 50G 39G 12G 78% /var/lib/docker/overlay2/59d0f795fa7c6d89467ada62d8e9e1cd8b9ad5628ca251bb5c9011fbed513af1/merged
overlay 50G 39G 12G 78% /var/lib/docker/overlay2/b7ed9b03a812579f993ac7dbe086afb15401ec5109af9467a5efbbc524f74b79/merged2、备份/home数据
[root@localhost opt]# mkdir /home-backup
[root@localhost opt]#
[root@localhost opt]# mv /home/* /home-backup
3、删除/home逻辑卷
[root@localhost /]# umount /home
[root@localhost /]#
[root@localhost /]# lvremove /dev/centos/home
Do you really want to remove active logical volume centos/home? [y/n]: yLogical volume "home" successfully removed
4、查看可用空间大小
[root@localhost /]# vgdisplay--- Volume group ---VG Name centosSystem ID Format lvm2Metadata Areas 1Metadata Sequence No 5VG Access read/writeVG Status resizableMAX LV 0Cur LV 2Open LV 2Max PV 0Cur PV 1Act PV 1VG Size <237.28 GiBPE Size 4.00 MiBTotal PE 60743Alloc PE / Size 14784 / 57.75 GiBFree PE / Size 45959 / <179.53 GiBVG UUID 6zqmne-yIRi-DzR0-pOc7-pwHI-O1hM-Vh7T5c根据：Free PE / Size 45959 / <179.53 GiB判断
可用空间为：179.53 GiB
5、新建/home卷
[root@localhost /]# lvcreate -L 50G -n home centos
WARNING: xfs signature detected on /dev/centos/home at offset 0. Wipe it? [y/n]: yWiping xfs signature on /dev/centos/home.Logical volume "home" created.
6、查看/home卷
[root@localhost /]# lvdisplay--- Logical volume ---LV Path /dev/centos/swapLV Name swapVG Name centosLV UUID PkUzOD-edvq-AYZH-RZte-nOOF-h27l-UDywl5LV Write Access read/writeLV Creation host, time localhost, 2024-05-07 16:07:38 +0800LV Status available# open 2LV Size 7.75 GiBCurrent LE 1984Segments 1Allocation inheritRead ahead sectors auto- currently set to 256Block device 253:1--- Logical volume ---LV Path /dev/centos/rootLV Name rootVG Name centosLV UUID jpAxQq-GFzU-AfaT-Hotn-k6bG-FwII-a6EzIqLV Write Access read/writeLV Creation host, time localhost, 2024-05-07 16:07:43 +0800LV Status available# open 1LV Size 50.00 GiBCurrent LE 12800Segments 1Allocation inheritRead ahead sectors auto- currently set to 256Block device 253:0--- Logical volume ---LV Path /dev/centos/homeLV Name homeVG Name centosLV UUID jMNrQ0-VpnG-FBry-wmrb-9oue-ALSZ-fuXYrdLV Write Access read/writeLV Creation host, time localhost.localdomain, 2024-05-08 09:38:46 +0800LV Status available# open 0LV Size 50.00 GiBCurrent LE 12800Segments 1Allocation inheritRead ahead sectors auto- currently set to 256Block device 253:2
分配50G空间成功
7、查看可用空间大小
[root@localhost /]# vgdisplay--- Volume group ---VG Name centosSystem ID Format lvm2Metadata Areas 1Metadata Sequence No 6VG Access read/writeVG Status resizableMAX LV 0Cur LV 3Open LV 2Max PV 0Cur PV 1Act PV 1VG Size <237.28 GiBPE Size 4.00 MiBTotal PE 60743Alloc PE / Size 27584 / 107.75 GiBFree PE / Size 33159 / <129.53 GiBVG UUID 6zqmne-yIRi-DzR0-pOc7-pwHI-O1hM-Vh7T5c根据：Free PE / Size 33159 / <129.53 GiB判断
可用空间为129.53 GiB
8、/home上建立xfs文件系统
[root@localhost /]# mkfs -t xfs /dev/centos/home
Discarding blocks...Done.
meta-data=/dev/centos/home isize=512 agcount=4, agsize=3276800 blks= sectsz=512 attr=2, projid32bit=1= crc=1 finobt=0, sparse=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 log bsize=4096 blocks=6400, version=2= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=09、挂载/home
[root@localhost /]# mount /dev/centos/home /home
[root@localhost /]#
[root@localhost /]#
[root@localhost /]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 7.7G 0 7.7G 0% /dev
tmpfs 7.7G 0 7.7G 0% /dev/shm
tmpfs 7.7G 18M 7.7G 1% /run
tmpfs 7.7G 0 7.7G 0% /sys/fs/cgroup
/dev/mapper/centos-root 50G 39G 12G 78% /
/dev/sda2 1014M 176M 839M 18% /boot
/dev/sda1 200M 12M 189M 6% /boot/efi
tmpfs 1.6G 0 1.6G 0% /run/user/0
overlay 50G 39G 12G 78% /var/lib/docker/overlay2/b13ed87897fe1cabe547341e9a855c43bf04fcf7f3ef44e41138b08e62fb6191/merged
overlay 50G 39G 12G 78% /var/lib/docker/overlay2/502140d31ceae249f65f90e2fc096af6d8cece5f086ab9ce7e01ff80ec82576d/merged
overlay 50G 39G 12G 78% /var/lib/docker/overlay2/b8bfb2a4f4360f9b3915452fb4303d5ebf02299bee754de9d7245b5efc0d8149/merged
overlay 50G 39G 12G 78% /var/lib/docker/overlay2/59d0f795fa7c6d89467ada62d8e9e1cd8b9ad5628ca251bb5c9011fbed513af1/merged
overlay 50G 39G 12G 78% /var/lib/docker/overlay2/b7ed9b03a812579f993ac7dbe086afb15401ec5109af9467a5efbbc524f74b79/merged
/dev/mapper/centos-home 50G 33M 50G 1% /home
10、迁移home目录的备份数据
[root@localhost /]# mv /home-backup/* /home
[root@localhost /]#
[root@localhost /]#
[root@localhost /]# rm -rf /home-backup
11、将剩余的空间129.53 GiB分配给根目录（/dev/centos/root）
[root@localhost /]# lvextend -L +129G /dev/centos/rootSize of logical volume centos/root changed from 50.00 GiB (12800 extents) to 179.00 GiB (45824 extents).Logical volume centos/root successfully resized.
[root@localhost /]#
[root@localhost /]#
[root@localhost /]#
[root@localhost /]#
[root@localhost /]# lvdisplay--- Logical volume ---LV Path /dev/centos/swapLV Name swapVG Name centosLV UUID PkUzOD-edvq-AYZH-RZte-nOOF-h27l-UDywl5LV Write Access read/writeLV Creation host, time localhost, 2024-05-07 16:07:38 +0800LV Status available# open 2LV Size 7.75 GiBCurrent LE 1984Segments 1Allocation inheritRead ahead sectors auto- currently set to 256Block device 253:1--- Logical volume ---LV Path /dev/centos/rootLV Name rootVG Name centosLV UUID jpAxQq-GFzU-AfaT-Hotn-k6bG-FwII-a6EzIqLV Write Access read/writeLV Creation host, time localhost, 2024-05-07 16:07:43 +0800LV Status available# open 1LV Size 179.00 GiBCurrent LE 45824Segments 2Allocation inheritRead ahead sectors auto- currently set to 256Block device 253:0--- Logical volume ---LV Path /dev/centos/homeLV Name homeVG Name centosLV UUID jMNrQ0-VpnG-FBry-wmrb-9oue-ALSZ-fuXYrdLV Write Access read/writeLV Creation host, time localhost.localdomain, 2024-05-08 09:38:46 +0800LV Status available# open 1LV Size 50.00 GiBCurrent LE 12800Segments 1Allocation inheritRead ahead sectors auto- currently set to 256Block device 253:2
12、扩展根目录（/dev/centos/root）
[root@localhost /]# xfs_growfs /dev/centos/root
meta-data=/dev/mapper/centos-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 46923776
[root@localhost /]#
[root@localhost /]#
[root@localhost /]#
[root@localhost /]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 7.7G 0 7.7G 0% /dev
tmpfs 7.7G 0 7.7G 0% /dev/shm
tmpfs 7.7G 18M 7.7G 1% /run
tmpfs 7.7G 0 7.7G 0% /sys/fs/cgroup
/dev/mapper/centos-root 179G 39G 141G 22% /
/dev/sda2 1014M 176M 839M 18% /boot
/dev/sda1 200M 12M 189M 6% /boot/efi
tmpfs 1.6G 0 1.6G 0% /run/user/0
overlay 179G 39G 141G 22% /var/lib/docker/overlay2/b13ed87897fe1cabe547341e9a855c43bf04fcf7f3ef44e41138b08e62fb6191/merged
overlay 179G 39G 141G 22% /var/lib/docker/overlay2/502140d31ceae249f65f90e2fc096af6d8cece5f086ab9ce7e01ff80ec82576d/merged
overlay 179G 39G 141G 22% /var/lib/docker/overlay2/b8bfb2a4f4360f9b3915452fb4303d5ebf02299bee754de9d7245b5efc0d8149/merged
overlay 179G 39G 141G 22% /var/lib/docker/overlay2/59d0f795fa7c6d89467ada62d8e9e1cd8b9ad5628ca251bb5c9011fbed513af1/merged
overlay 179G 39G 141G 22% /var/lib/docker/overlay2/b7ed9b03a812579f993ac7dbe086afb15401ec5109af9467a5efbbc524f74b79/merged
/dev/mapper/centos-home 50G 33M 50G 1% /home这篇关于Centos7 将home空间分配给根目录（/dev/centos/root）的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
