ubuntu 22.04 台式机安装后根分区小自动扩容方法 /dev/ubuntu-vg/ubuntu-lv 扩容-摩杜云开发者社区

/dev/ubuntu-vg/ubuntu-lv 扩容

故障显示为：

/dev/sda3 是我的1T

Disk /dev/mapper/ubuntu--vg-ubuntu--lv: 100 GiB,只给了100G

root@server-8-3:~# sudo fdisk -l
Disk /dev/loop0: 61.89 MiB, 64901120 bytes, 126760 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop1: 79.95 MiB, 83832832 bytes, 163736 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop2: 44.68 MiB, 46845952 bytes, 91496 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sda: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: ST1000DM003-1SB1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 34730401-B09F-451A-8C52-2F7646AAE5EB

Device       Start        End    Sectors   Size Type
/dev/sda1     2048       4095       2048     1M BIOS boot
/dev/sda2     4096    4198399    4194304     2G Linux filesystem
/dev/sda3  4198400 1953521663 1949323264 929.5G Linux filesystem


Disk /dev/mapper/ubuntu--vg-ubuntu--lv: 100 GiB, 107374182400 bytes, 209715200 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
root@server-8-3:~# df -h
Filesystem                         Size  Used Avail Use% Mounted on
tmpfs                              789M  1.4M  788M   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv   98G  7.0G   86G   8% /
tmpfs                              3.9G     0  3.9G   0% /dev/shm
tmpfs                              5.0M     0  5.0M   0% /run/lock
/dev/sda2                          2.0G  129M  1.7G   8% /boot
tmpfs                              789M  4.0K  789M   1% /run/user/0

如下

Disk /dev/loop0: 61.89 MiB, 64901120 bytes, 126760 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop1: 79.95 MiB, 83832832 bytes, 163736 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop2: 44.68 MiB, 46845952 bytes, 91496 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sda: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: ST1000DM003-1SB1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 34730401-B09F-451A-8C52-2F7646AAE5EB

Device       Start        End    Sectors   Size Type
/dev/sda1     2048       4095       2048     1M BIOS boot
/dev/sda2     4096    4198399    4194304     2G Linux filesystem
/dev/sda3  4198400 1953521663 1949323264 929.5G Linux filesystem


Disk /dev/mapper/ubuntu--vg-ubuntu--lv: 100 GiB, 107374182400 bytes, 209715200 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
root@server-8-3:~# df -h
Filesystem                         Size  Used Avail Use% Mounted on
tmpfs                              789M  1.4M  788M   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv   98G  7.0G   86G   8% /
tmpfs                              3.9G     0  3.9G   0% /dev/shm
tmpfs                              5.0M     0  5.0M   0% /run/lock
/dev/sda2                          2.0G  129M  1.7G   8% /boot
tmpfs                              789M  4.0K  789M   1% /run/user/0

ubuntu 22.04 台式机安装后根分区小自动扩容方法 /dev/ubuntu-vg/ubuntu-lv 扩容_逻辑卷

上图说明：实际是1T硬盘但是 UBUNTU 22.04 自动默认安装后根分区只有98G

故障解决：

LVM是Logical Volume Manager(逻辑卷管理)的缩写，是Linux环境下对磁盘分区进行管理的一种机制。 LVM逻辑卷三种状态：

PV: Physical Volume 物理卷
VG: Volume Group 卷组
LV: Logical Volume 逻辑卷

要将包含 sda3 分区的逻辑卷（logical volume） ubuntu--vg-ubuntu--lv 扩展到整个分区的大小，可以按照以下步骤进行操作：

1.使用 fdisk 命令检查硬盘的分区布局并找到需要扩展的分区号码。在这种情况下，您需要记下sda3的起始扇区和结束扇区。

使用 pvresize 命令调整物理卷（physical volume）的大小，使其包括扩展的分区。例如，如果 sda3 已经被扩展到 50GB，则运行以下命令：

root@server-8-3:~# pvresize /dev/sda3

  Physical volume "/dev/sda3" changed
  1 physical volume(s) resized or updated / 0 physical volume(s) not resized
  翻译
  物理卷已调整大小或已更新/0个物理卷未调整大小

然后使用 lvextend 命令将逻辑卷扩展到物理卷的大小。例如，运行以下命令将 ubuntu--vg-ubuntu--lv 扩展到整个 sda3 分区的大小：

lvextend -r -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv

这里 -r 标志将自动调整文件系统大小以填充新的逻辑卷空间。

检查文件系统是否已成功调整大小：

df -h
    
  实例：  
root@server-8-3:~# df -h
Filesystem                         Size  Used Avail Use% Mounted on
tmpfs                              789M  1.4M  788M   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv  915G  7.0G  870G   1% /
tmpfs                              3.9G     0  3.9G   0% /dev/shm
tmpfs                              5.0M     0  5.0M   0% /run/lock
/dev/sda2                          2.0G  129M  1.7G   8% /boot
tmpfs                              789M  4.0K  789M   1% /run/user/0

这应该会显示更大的可用空间。

root@server-8-3:~# pvresize /dev/sda3