vmbox虚拟机动态硬盘扩容

1.增加硬盘容量，虚拟机关闭情况下，通过工具扩充磁盘容量

2.fdisk /dev/sda #进入分区界面

输入n #新建一个分区
回车默认 #分区号
回车默认 #设置起始分区地址
回车默认 #设置大小
输入w #保存
sudo partx -u /dev/sda #创建完成，刷新分区

3.创建物理卷

root@ubuntu03:~# pvcreate /dev/sda4
  Physical volume "/dev/sda4" successfully created.

4.查看卷组

root@ubuntu03:~# 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
...

5.把创建的物理卷加入卷组

root@ubuntu:~# vgextend ubuntu-vg /dev/sda4 加入卷组
Volume group "ubuntu-vg" successfully extended

6.查看扩容的文件路径

root@ubuntu03:~# df -Th
Filesystem                        Type     Size  Used Avail Use% Mounted on
tmpfs                             tmpfs    197M  1.2M  196M   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv ext4      12G  8.4G  2.3G  79% /
tmpfs                             tmpfs    982M     0  982M   0% /dev/shm
tmpfs                             tmpfs    5.0M     0  5.0M   0% /run/lock
/dev/sda2                         ext4     2.0G  251M  1.6G  14% /boot
tmpfs                             tmpfs    197M  4.0K  197M   1% /run/user/0

7.把卷组剩余内存容量加到扩容的文件系统上，我这里是 /dev/mapper/ubuntu--vg-ubuntu--lv

root@ubuntu03:~# lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
  Size of logical volume ubuntu-vg/ubuntu-lv changed from <11.50 GiB (2943 extents) to 37.99 GiB (9726 extents).
  Logical volume ubuntu-vg/ubuntu-lv successfully resized.

8.刷新逻辑卷

root@ubuntu03:~# resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
resize2fs 1.46.5 (30-Dec-2021)
Filesystem at /dev/mapper/ubuntu--vg-ubuntu--lv is mounted on /; on-line resizing required
old_desc_blocks = 2, new_desc_blocks = 5
The filesystem on /dev/mapper/ubuntu--vg-ubuntu--lv is now 9959424 (4k) blocks long.

9.df -Th 查看内存情况，已成功扩容。

Filesystem                        Type     Size  Used Avail Use% Mounted on
tmpfs                             tmpfs    197M  1.2M  196M   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv ext4      38G  8.4G   28G  24% /
tmpfs                             tmpfs    982M     0  982M   0% /dev/shm
tmpfs                             tmpfs    5.0M     0  5.0M   0% /run/lock
/dev/sda2                         ext4     2.0G  251M  1.6G  14% /boot
tmpfs                             tmpfs    197M  4.0K  197M   1% /run/user/0