Add new disk on LVM for Ubuntu 22.04 LTS

这些说明将帮助您在Ubuntu 22.04上向现有的逻辑卷管理（LVM）中添加额外的磁盘。LVM可以帮助您轻松地扩展存储空间跨多个物理磁盘设备。

用于向当前磁盘扩展空间

找出要分配给LVM的磁盘

sudo pvs
PV         VG        Fmt  Attr PSize    PFree
/dev/vda3  ubuntu-vg lvm2 a--    <8.25g    0 
/dev/vdb   ubuntu-vg lvm2 a--   <50.00g    0

查看详细信息

$ sudo pvdisplay
  --- Physical volume ---
  PV Name               /dev/vda3
  VG Name               ubuntu-vg
  PV Size               <8.25 GiB / not usable 0   
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              2111
  Free PE               0
  Allocated PE          2111
  PV UUID               96Cnvs-1rYe-xWk8-lB2V-cLSd-ALqk-4ujiPc
   
  --- Physical volume ---
  PV Name               /dev/vdb
  VG Name               ubuntu-vg
  PV Size               50.00 GiB / not usable 4.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              12799
  Free PE               0
  Allocated PE          12799
  PV UUID               Hle3gv-3FNW-jkoe-dRFf-CwWd-pdJx-MWy3Ad

获取LVM的路径

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$ sudo lvdisplay
  --- Logical volume ---
  LV Path                /dev/ubuntu-vg/ubuntu-lv

省略了其他信息

找到要添加的新磁盘

$ sudo fdisk -l | grep '^Disk /dev/'
Disk /dev/loop0: 63.24 MiB, 66314240 bytes, 129520 sectors
Disk /dev/loop1: 63.23 MiB, 66301952 bytes, 129496 sectors
Disk /dev/loop2: 79.95 MiB, 83832832 bytes, 163736 sectors
Disk /dev/loop3: 102.98 MiB, 107986944 bytes, 210912 sectors
Disk /dev/loop4: 49.62 MiB, 52031488 bytes, 101624 sectors
Disk /dev/vda: 10 GiB, 10737418240 bytes, 20971520 sectors
Disk /dev/vdb: 50 GiB, 53687091200 bytes, 104857600 sectors
Disk /dev/vdc: 500 GiB, 536870912000 bytes, 1048576000 sectors
Disk /dev/mapper/ubuntu--vg-ubuntu--lv: 558.24 GiB, 599403790336 bytes, 1170710528 sectors

在本例中，它将是/dev/vdc，因为我向这个实例添加了一个500GB的磁盘驱动器。

在新的磁盘驱动器上创建物理卷

1 2	$ sudo pvcreate /dev/vdc Physical volume "/dev/vdc" successfully created.

扩展现有卷组以包含这个新的磁盘驱动器

1 2	$ sudo vgextend ubuntu-vg /dev/vdc Volume group "ubuntu-vg" successfully extended

扩展LV大小以包含100%的新磁盘

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$ sudo lvm lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
  Size of logical volume ubuntu-vg/ubuntu-lv changed from 58.24 GiB (14910 extents) to <558.24 GiB (142909 extents).
  Logical volume ubuntu-vg/ubuntu-lv successfully resized.

现在需要调整文件系统的大小以匹配新的大小

$ sudo resize2fs -p /dev/ubuntu-vg/ubuntu-lv
resize2fs 1.46.5 (30-Dec-2021)
Filesystem at /dev/ubuntu-vg/ubuntu-lv is mounted on /; on-line resizing required
old_desc_blocks = 8, new_desc_blocks = 70
The filesystem on /dev/ubuntu-vg/ubuntu-lv is now 146338816 (4k) blocks long.

现在可以用df -kh来验证

$ df -kh
Filesystem                         Size  Used Avail Use% Mounted on
tmpfs                              9.9G  1.6M  9.9G   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv  550G  8.9G  519G   2% /
tmpfs                               50G     0   50G   0% /dev/shm
tmpfs                              5.0M     0  5.0M   0% /run/lock
tmpfs                               50G     0   50G   0% /run/qemu
/dev/vda2                          1.7G  247M  1.4G  16% /boot
tmpfs                              9.9G  4.0K  9.9G   1% /run/user/1000

参考：

Add new disk on LVM for Ubuntu 22.04 LTS | by BoNeZ | Level Up Coding