Ubuntu 系统 LVM 逻辑卷扩容教程
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To escape to local shell, press 'Ctrl+Alt+]'.Welcome to Ubuntu 24.04.1 LTS (GNU/Linux 6.8.0-47-generic x86_64)* Documentation: https://help.ubuntu.com* Management: https://landscape.canonical.com* Support: https://ubuntu.com/proSystem information as of Wed Sep 3 04:26:55 AM UTC 2025System load: 0.25 Processes: 263Usage of /: 16.2% of 47.93GB Users logged in: 1Memory usage: 14% IPv4 address for ens33: 192.168.182.130Swap usage: 0%* Strictly confined Kubernetes makes edge and IoT secure. Learn how MicroK8sjust raised the bar for easy, resilient and secure K8s cluster deployment.https://ubuntu.com/engage/secure-kubernetes-at-the-edgeExpanded Security Maintenance for Applications is not enabled.266 updates can be applied immediately.
139 of these updates are standard security updates.
To see these additional updates run: apt list --upgradableEnable ESM Apps to receive additional future security updates.
See https://ubuntu.com/esm or run: sudo pro statusLast login: Fri Oct 18 06:14:00 2024 from 192.168.182.1
/usr/bin/xauth: file /home/wqbboy/.Xauthority does not exist
查看磁盘空间，查看逻辑卷和挂载点
wqbboy@mail:~$ df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 480M 1.6M 478M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 48G 7.8G 38G 18% /
tmpfs 2.4G 0 2.4G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda2 2.0G 95M 1.7G 6% /boot
tmpfs 480M 12K 480M 1% /run/user/1000查看卷组（VG）可用空间
wqbboy@mail:~$ sudo vgs
[sudo] password for wqbboy: VG #PV #LV #SN Attr VSize VFree ubuntu-vg 1 1 0 wz--n- <98.00g 49.00g查看卷组（VG）可用空间，输出关键信息：
wqbboy@mail:~$ sudo vgdisplay--- Volume group ---VG Name ubuntu-vgSystem ID Format lvm2Metadata Areas 1Metadata Sequence No 2VG Access read/writeVG Status resizableMAX LV 0Cur LV 1Open LV 1Max PV 0Cur PV 1Act PV 1VG Size <98.00 GiBPE Size 4.00 MiBTotal PE 25087Alloc PE / Size 12543 / <49.00 GiBFree PE / Size 12544 / 49.00 GiBVG UUID YSc7Yq-MQFn-T7xE-s04o-4aS0-1CPt-27h0ff查看卷
wqbboy@mail:~$ df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 480M 1.6M 478M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 48G 7.8G 38G 18% /
tmpfs 2.4G 0 2.4G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda2 2.0G 95M 1.7G 6% /boot
tmpfs 480M 12K 480M 1% /run/user/1000查看验证卷组空间
wqbboy@mail:~$ sudo vgsVG #PV #LV #SN Attr VSize VFree ubuntu-vg 1 1 0 wz--n- <98.00g 49.00g
扩展逻辑卷（LV）
使用卷组的空闲空间扩展逻辑卷 /dev/mapper/ubuntu–vg-ubuntu–lv。
扩展逻辑卷容量
扩展至固定大小（如新增 10G）：
sudo lvextend -L +10G /dev/mapper/ubuntu--vg-ubuntu--lv占用全部剩余空间：
sudo lvextend -l +100%FREE /dev/mapper/ubuntu–vg-ubuntu–lv
wqbboy@mail:~$ sudo lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntn--lvLogical volume ubuntn-lv not found in volume group ubuntu-vg.
wqbboy@mail:~$ sudo lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lvSize of logical volume ubuntu-vg/ubuntu-lv changed from <49.00 GiB (12543 extents) to <98.00 GiB (25087 extents).Logical volume ubuntu-vg/ubuntu-lv successfully resized.
wqbboy@mail:~$ df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 480M 1.6M 478M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 48G 7.8G 38G 18% /
tmpfs 2.4G 0 2.4G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda2 2.0G 95M 1.7G 6% /boot
tmpfs 480M 12K 480M 1% /run/user/1000
验证逻辑卷大小
wqbboy@mail:~$ sudo lvsLV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convertubuntu-lv ubuntu-vg -wi-ao---- <98.00g 确认文件系统类型
wqbboy@mail:~$ lsblk -f
NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINTS
loop0 0 100% /snap/core18/2846
loop1 0 100% /snap/nextcloud/44391
loop2 0 100% /snap/snapd/21759
loop3 0 100% /snap/core18/2940
loop4 0 100% /snap/nextcloud/49897
sda
├─sda1
├─sda2 ext4 1.0 adc4c153-3965-473e-bf24-0dde9527424b 1.7G 5% /boot
└─sda3 LVM2_m LVM2 TMS1dP-e8gx-zPi0-peXo-6JZR-Lfvx-YV1HOM └─ubuntu--vg-ubuntu--lvext4 1.0 f47d9e69-239f-4a7f-8573-bfd669ce397d 37.7G 16% /
sr0
wqbboy@mail:~$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 55.4M 1 loop /snap/core18/2846
loop1 7:1 0 323.9M 1 loop /snap/nextcloud/44391
loop2 7:2 0 38.8M 1 loop /snap/snapd/21759
loop3 7:3 0 55.5M 1 loop /snap/core18/2940
loop4 7:4 0 335.8M 1 loop /snap/nextcloud/49897
sda 8:0 0 100G 0 disk
├─sda1 8:1 0 1M 0 part
├─sda2 8:2 0 2G 0 part /boot
└─sda3 8:3 0 98G 0 part └─ubuntu--vg-ubuntu--lv 252:0 0 98G 0 lvm /
sr0 11:0 1 1024M 0 rom
wqbboy@mail:~$ lsblk -f
NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINTS
loop0 0 100% /snap/core18/2846
loop1 0 100% /snap/nextcloud/44391
loop2 0 100% /snap/snapd/21759
loop3 0 100% /snap/core18/2940
loop4 0 100% /snap/nextcloud/49897
sda
├─sda1
├─sda2 ext4 1.0 adc4c153-3965-473e-bf24-0dde9527424b 1.7G 5% /boot
└─sda3 LVM2_m LVM2 TMS1dP-e8gx-zPi0-peXo-6JZR-Lfvx-YV1HOM └─ubuntu--vg-ubuntu--lvext4 1.0 f47d9e69-239f-4a7f-8573-bfd669ce397d 37.7G 16% /
sr0 调整文件系统大小
ext4 文件系统：
sudo resize2fs /dev/mapper/ubuntu–vg-ubuntu–lv
xfs 文件系统：
sudo xfs_growfs /dev/mapper/ubuntu–vg-ubuntu–lv
wqbboy@mail:~$ sudo resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
resize2fs 1.47.0 (5-Feb-2023)
Filesystem at /dev/mapper/ubuntu--vg-ubuntu--lv is mounted on /; on-line resizing required
old_desc_blocks = 7, new_desc_blocks = 13
The filesystem on /dev/mapper/ubuntu--vg-ubuntu--lv is now 25689088 (4k) blocks long.
wqbboy@mail:~$ df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 480M 1.6M 478M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 97G 7.8G 84G 9% /
tmpfs 2.4G 0 2.4G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda2 2.0G 95M 1.7G 6% /boot
tmpfs 480M 12K 480M 1% /run/user/1000
wqbboy@mail:~$