WeAir

动态调整LVM分区大小

查看当前各分区大小

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df -h
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Filesystem                  Size  Used Avail Use% Mounted on
/dev/mapper/openeuler-root   69G   56G  9.9G  85% /
devtmpfs                    4.0M     0  4.0M   0% /dev
tmpfs                        12G     0   12G   0% /dev/shm
tmpfs                       4.0M     0  4.0M   0% /sys/fs/cgroup
tmpfs                       4.7G  488M  4.2G  11% /run
tmpfs                        12G  8.0K   12G   1% /tmp
/dev/vda2                   974M  344M  563M  38% /boot
/dev/mapper/openeuler-home   41G   24K   39G   1% /home

卸载home分区

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umount /home

检查分区

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e2fsck -f /dev/mapper/openeuler-home
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e2fsck 1.47.0 (5-Feb-2023)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/mapper/openeuler-home: 11/2698080 files (0.0% non-contiguous), 247204/10782720 blocks

调整home分区大小

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resize2fs -p /dev/mapper/openeuler-home 10G
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resize2fs 1.47.0 (5-Feb-2023)
Resizing the filesystem on /dev/mapper/openeuler-home to 2621440 (4k) blocks.
Begin pass 2 (max = 65536)
Relocating blocks             XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Begin pass 3 (max = 330)
Scanning inode table          XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
The filesystem on /dev/mapper/openeuler-home is now 2621440 (4k) blocks long.

压缩逻辑卷所占空间大小

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lvreduce -L 10G /dev/mapper/openeuler-home

查看卷组信息

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vgdisplay
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--- Volume group ---
VG Name               openeuler
System ID
Format                lvm2
Metadata Areas        1
Metadata Sequence No  5
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               <119.00 GiB
PE Size               4.00 MiB
Total PE              30463
Alloc PE / Size       22493 / 87.86 GiB
Free  PE / Size       7970 / 31.13 GiB
VG UUID               1GU3bo-9ztM-DzPZ-VFnZ-VaTF-Am3S-zoCoTO

扩展逻辑卷容量

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lvextend -l+100%FREE /dev/mapper/openeuler-root

调整根分区大小

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resize2fs -p /dev/mapper/openeuler-root
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resize2fs 1.47.0 (5-Feb-2023)
Filesystem at /dev/mapper/openeuler-root is mounted on /; on-line resizing required
old_desc_blocks = 9, new_desc_blocks = 13
The filesystem on /dev/mapper/openeuler-root is now 26511360 (4k) blocks long.

重新挂载home分区

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mount /dev/mapper/openeuler-home /home

查看调整后各分区大小

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df -h
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Filesystem                  Size  Used Avail Use% Mounted on
/dev/mapper/openeuler-root   99G   56G   40G  59% /
devtmpfs                    4.0M     0  4.0M   0% /dev
tmpfs                        12G     0   12G   0% /dev/shm
tmpfs                       4.0M     0  4.0M   0% /sys/fs/cgroup
tmpfs                       4.7G  488M  4.2G  11% /run
tmpfs                        12G  8.0K   12G   1% /tmp
/dev/vda2                   974M  344M  563M  38% /boot
/dev/mapper/openeuler-home  9.6G   28K  9.1G   1% /home