扩容带有LVM的Linux分区

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lvm-extend

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Linux

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如何扩容LVM下的Linux分区

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拓展物理卷大小：

这里使用的是 Pve，仅需在 Pve 中编辑磁盘大小即可

使用 parted 工具修改对应卷大小

$ sudo parted # 进入 parted 工具

GNU Parted 3.4
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.

$ print /dev/sda # 查看分区情况

Model: QEMU QEMU HARDDISK (scsi)
Disk /dev/sda: 137GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:

Number  Start   End     Size    File system  Name  Flags
 1      1049kB  2097kB  1049kB                     bios_grub
 2      2097kB  2150MB  2147MB  ext4
 3      2150MB  68.7GB  66.6GB

我们要扩容的是 3 号分区，所以我们键入

$ resizepart 3
End?  [68.7GB]? 137G # 我这里选择扩容剩下所有空间，输入 137G
$ quit # 退出 parted

此时在 fdisk 中即可看到分区容量已经变为 125.6G

$ sudo fdisk -l

Disk /dev/sda: 128 GiB, 137438953472 bytes, 268435456 sectors
Disk model: QEMU HARDDISK
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: E399CBE4-C05A-4065-AF2A-2B043574B43D

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 267578125 263379726 125.6G Linux filesystem

在 lvm 中拓展 Logical volume

$ sudo lvdisplay
  --- Logical volume ---
  LV Path                /dev/ubuntu-vg/ubuntu-lv
  LV Name                ubuntu-lv
  VG Name                ubuntu-vg
  LV UUID                VJLtpc-Y2BH-2R9P-uxoC-f0Gg-yn7d-E4jKeC
  LV Write Access        read/write
  LV Creation host, time ubuntu-server, 2023-06-05 08:15:51 +0000
  LV Status              available
  # open                 1
  LV Size                <31.00 GiB
  Current LE             7935
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

查看 lv 信息，可以看到 lv path

$ sudo lvresize -l +100%FREE ubuntu-vg/ubuntu-lv # 将 ubuntu-vg/ubuntu-lv 扩容到剩下的所有空间
	Size of logical volume ubuntu-vg/ubuntu-lv changed from <31.00 GiB (7935 extents) to <125.59 GiB (32150 extents).
  Logical volume ubuntu-vg/ubuntu-lv successfully resized.

使用 resize2fs 调整分区大小

sudo 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 = 4, new_desc_blocks = 16
The filesystem on /dev/mapper/ubuntu--vg-ubuntu--lv is now 32921600 (4k) blocks long.

此时 df -h 可以看到分区大小已增大

$ df -h
Filesystem                         Size  Used Avail Use% Mounted on
tmpfs                              1.2G  1.2M  1.2G   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv  124G   27G   92G  23% /
tmpfs                              5.9G     0  5.9G   0% /dev/shm
tmpfs                              5.0M     0  5.0M   0% /run/lock
/dev/sda2                          2.0G  252M  1.6G  14% /boot
tmpfs                              1.2G   16K  1.2G   1% /run/user/1000