之前在 VMware 安装 Ubuntu Server 的时候 磁盘分区 选择了 LVM,所以系统根目录默认占用磁盘大小只有默认大小(10G),在安装软件时发现磁盘空间已经无法满足,所以需要利用 LVM 对磁盘进行扩容。
- 查看文件系统磁盘空间的使用情况
root@ubuntu:~# df -h Filesystem Size Used Avail Use% Mounted on udev 451M 0 451M 0% /dev tmpfs 97M 1.3M 96M 2% /run /dev/mapper/ubuntu--vg-ubuntu--lv 3.9G 3.4G 287M 93% / tmpfs 482M 0 482M 0% /dev/shm tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 482M 0 482M 0% /sys/fs/cgroup /dev/loop0 92M 92M 0 100% /snap/core/8689 /dev/loop1 90M 90M 0 100% /snap/core/8268 /dev/sda2 976M 77M 832M 9% /boot tmpfs 97M 0 97M 0% /run/user/0
可以发现 /dev/mapper/ubuntu--vg-ubuntu--lv
虚拟机根目录空间只有3.9G,使用了93%
- 查看LVM卷组的信息
root@ubuntu:~# vgdisplay --- Volume group --- VG Name ubuntu-vg System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 2 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 1 Act PV 1 VG Size <19.00 GiB PE Size 4.00 MiB Total PE 4863 Alloc PE / Size 1024 / 4.00 GiB Free PE / Size 3839 / <15.00 GiB VG UUID hZPoxm-kSBU-fmKs-2yXD-hHoe-3T7e-PCIFSe
Free PE / Size 3839 / <15.00 GiB,这是还可以扩充的大小
- 使用命令进行磁盘扩容
lvextend -L 10G /dev/mapper/ubuntu--vg-ubuntu--lv //增大或减小至19G lvextend -L +10G /dev/mapper/ubuntu--vg-ubuntu--lv //增加10G lvreduce -L -10G /dev/mapper/ubuntu--vg-ubuntu--lv //减小10G lvresize -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv //按百分比扩容 resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv //执行调整
- 具体操作如下
// 按百分比进行磁盘扩容 root@ubuntu:~# lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv Size of logical volume ubuntu-vg/ubuntu-lv changed from 4.00 GiB (1024 extents) to <19.00 GiB (4863 extents). Logical volume ubuntu-vg/ubuntu-lv successfully resized. // 刷新分区 root@ubuntu:~# resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv resize2fs 1.44.1 (24-Mar-2018) Filesystem at /dev/mapper/ubuntu--vg-ubuntu--lv is mounted on /; on-line resizing required old_desc_blocks = 3, new_desc_blocks = 3 The filesystem on /dev/mapper/ubuntu--vg-ubuntu--lv is now 4979712 (4k) blocks long. // 查看文件系统磁盘空间的使用情况(发现此时已经扩容到19G) root@ubuntu:~# df -h Filesystem Size Used Avail Use% Mounted on udev 451M 0 451M 0% /dev tmpfs 97M 1.3M 96M 2% /run /dev/mapper/ubuntu--vg-ubuntu--lv 19G 3.9G 14G 22% / tmpfs 482M 0 482M 0% /dev/shm tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 482M 0 482M 0% /sys/fs/cgroup /dev/loop0 92M 92M 0 100% /snap/core/8689 /dev/loop1 90M 90M 0 100% /snap/core/8268 /dev/sda2 976M 77M 832M 9% /boot tmpfs 97M 0 97M 0% /run/user/0 // 再次查看LVM卷组的信息(可扩容的空间已经成为0) root@ubuntu:~# vgdisplay --- Volume group --- VG Name ubuntu-vg System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 1 Act PV 1 VG Size <19.00 GiB PE Size 4.00 MiB Total PE 4863 Alloc PE / Size 4863 / <19.00 GiB Free PE / Size 0 / 0 VG UUID hZPoxm-kSBU-fmKs-2yXD-hHoe-3T7e-PCIFSec
copy了原文的内容,抄也要认真抄
全文引用自:https://blog.csdn.net/Fly_1213/article/details/105142427
标签:mapper,vg,--,dev,lv,ubuntu From: https://www.cnblogs.com/gcc2020/p/16601857.html