1、查看目录布局
- [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/merged
复制代码 2、备份/home数据
- [root@localhost opt]# mkdir /home-backup
- [root@localhost opt]#
- [root@localhost opt]# mv /home/* /home-backup
复制代码 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]: y
- Logical volume "home" successfully removed
复制代码 4、查看可用空间大小
- [root@localhost /]# vgdisplay
- --- Volume group ---
- VG Name centos
- System ID
- Format lvm2
- Metadata Areas 1
- Metadata Sequence No 5
- VG Access read/write
- VG Status resizable
- MAX LV 0
- Cur LV 2
- Open LV 2
- Max PV 0
- Cur PV 1
- Act PV 1
- VG Size <237.28 GiB
- PE Size 4.00 MiB
- Total PE 60743
- Alloc PE / Size 14784 / 57.75 GiB
- Free PE / Size 45959 / <179.53 GiB
- VG UUID 6zqmne-yIRi-DzR0-pOc7-pwHI-O1hM-Vh7T5c
复制代码 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]: y
- Wiping xfs signature on /dev/centos/home.
- Logical volume "home" created.
复制代码 6、查看/home卷
- [root@localhost /]# lvdisplay
- --- Logical volume ---
- LV Path /dev/centos/swap
- LV Name swap
- VG Name centos
- LV UUID PkUzOD-edvq-AYZH-RZte-nOOF-h27l-UDywl5
- LV Write Access read/write
- LV Creation host, time localhost, 2024-05-07 16:07:38 +0800
- LV Status available
- # open 2
- LV Size 7.75 GiB
- Current LE 1984
- Segments 1
- Allocation inherit
- Read ahead sectors auto
- - currently set to 256
- Block device 253:1
-
- --- Logical volume ---
- LV Path /dev/centos/root
- LV Name root
- VG Name centos
- LV UUID jpAxQq-GFzU-AfaT-Hotn-k6bG-FwII-a6EzIq
- LV Write Access read/write
- LV Creation host, time localhost, 2024-05-07 16:07:43 +0800
- LV Status available
- # open 1
- LV Size 50.00 GiB
- Current LE 12800
- Segments 1
- Allocation inherit
- Read ahead sectors auto
- - currently set to 256
- Block device 253:0
-
- --- Logical volume ---
- LV Path /dev/centos/home
- LV Name home
- VG Name centos
- LV UUID jMNrQ0-VpnG-FBry-wmrb-9oue-ALSZ-fuXYrd
- LV Write Access read/write
- LV Creation host, time localhost.localdomain, 2024-05-08 09:38:46 +0800
- LV Status available
- # open 0
- LV Size 50.00 GiB
- Current LE 12800
- Segments 1
- Allocation inherit
- Read ahead sectors auto
- - currently set to 256
- Block device 253:2
复制代码 分配50G空间成功
7、查看可用空间大小
- [root@localhost /]# vgdisplay
- --- Volume group ---
- VG Name centos
- System ID
- Format lvm2
- Metadata Areas 1
- Metadata Sequence No 6
- VG Access read/write
- VG Status resizable
- MAX LV 0
- Cur LV 3
- Open LV 2
- Max PV 0
- Cur PV 1
- Act PV 1
- VG Size <237.28 GiB
- PE Size 4.00 MiB
- Total PE 60743
- Alloc PE / Size 27584 / 107.75 GiB
- Free PE / Size 33159 / <129.53 GiB
- VG UUID 6zqmne-yIRi-DzR0-pOc7-pwHI-O1hM-Vh7T5c
复制代码 根据:Free PE / Size 33159 / <129.53 GiB判断
可用空间为129.53 GiB
8、/home上创建xfs文件体系
- [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=0
复制代码 9、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
复制代码 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
复制代码 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/root
- Size 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/swap
- LV Name swap
- VG Name centos
- LV UUID PkUzOD-edvq-AYZH-RZte-nOOF-h27l-UDywl5
- LV Write Access read/write
- LV Creation host, time localhost, 2024-05-07 16:07:38 +0800
- LV Status available
- # open 2
- LV Size 7.75 GiB
- Current LE 1984
- Segments 1
- Allocation inherit
- Read ahead sectors auto
- - currently set to 256
- Block device 253:1
-
- --- Logical volume ---
- LV Path /dev/centos/root
- LV Name root
- VG Name centos
- LV UUID jpAxQq-GFzU-AfaT-Hotn-k6bG-FwII-a6EzIq
- LV Write Access read/write
- LV Creation host, time localhost, 2024-05-07 16:07:43 +0800
- LV Status available
- # open 1
- LV Size 179.00 GiB
- Current LE 45824
- Segments 2
- Allocation inherit
- Read ahead sectors auto
- - currently set to 256
- Block device 253:0
-
- --- Logical volume ---
- LV Path /dev/centos/home
- LV Name home
- VG Name centos
- LV UUID jMNrQ0-VpnG-FBry-wmrb-9oue-ALSZ-fuXYrd
- LV Write Access read/write
- LV Creation host, time localhost.localdomain, 2024-05-08 09:38:46 +0800
- LV Status available
- # open 1
- LV Size 50.00 GiB
- Current LE 12800
- Segments 1
- Allocation inherit
- Read ahead sectors auto
- - currently set to 256
- Block device 253:2
复制代码 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
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