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使用快照备份迁移lvm

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2022/06/20 Share

前言

云计算时代，很少使用LVM了, 大部分的云商的磁盘也支持热扩容。

基本上没有使用过lvm, 所以记录一下。

操作步骤

使用快照, 备份磁盘

使用云商功能创建即可

创建虚拟机,并将快照挂载到虚拟机实例

如题

恢复LVM

  1. 进入机器以后, 可以看到。

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    root@lvm-restore-test:~# df -h
    Filesystem      Size  Used Avail Use% Mounted on
    udev            2.0G     0  2.0G   0% /dev
    tmpfs           394M  376K  393M   1% /run
    /dev/sda1        30G  1.7G   27G   6% /
    tmpfs           2.0G     0  2.0G   0% /dev/shm
    tmpfs           5.0M     0  5.0M   0% /run/lock
    /dev/sda15      124M  5.9M  118M   5% /boot/efi
    tmpfs           394M     0  394M   0% /run/user/0

  2. 查看硬盘

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root@lvm-restore-test:~# fdisk -l
Disk /dev/sdb: 2 TiB, 2199023255552 bytes, 4294967296 sectors
Disk model: PersistentDisk
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: C453DB50-FA6A-4A68-8714-A36F54DEE02E

Device     Start        End    Sectors Size Type
/dev/sdb1   2048 4294965247 4294963200   2T Linux LVM


Disk /dev/sda: 30 GiB, 32212254720 bytes, 62914560 sectors
Disk model: PersistentDisk
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: 4D4AC699-86B2-C145-B35C-3BF615766DE4

Device      Start      End  Sectors  Size Type
/dev/sda1  262144 62912512 62650369 29.9G Linux filesystem
/dev/sda14   2048     8191     6144    3M BIOS boot
/dev/sda15   8192   262143   253952  124M EFI System

Partition table entries are not in disk order.
  1. 查看lvm
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    root@lvm-restore-test:~# pvdisplay
      --- Physical volume ---
      PV Name               /dev/sdb1
      VG Name               vg0
      PV Size               <2.00 TiB / not usable 2.00 MiB
      Allocatable           yes (but full)
      PE Size               4.00 MiB
      Total PE              524287
      Free PE               0
      Allocated PE          524287
      PV UUID               1utwKu-hhdD-38fo-dwpQ-vsP4-iFGC-bYP2UD

    root@lvm-restore-test:~# vgdisplay
      --- Volume group ---
      VG Name               vg0
      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               0
      Max PV                0
      Cur PV                1
      Act PV                1
      VG Size               <2.00 TiB
      PE Size               4.00 MiB
      Total PE              524287
      Alloc PE / Size       524287 / <2.00 TiB
      Free  PE / Size       0 / 0
      VG UUID               sJdUeZ-KIfz-YLLg-0p0Y-f23A-rmK0-zZpb8t

    root@lvm-restore-test:~# lvdisplay
      --- Logical volume ---
      LV Path                /dev/vg0/data
      LV Name                data
      VG Name                vg0
      LV UUID                nkzPK7-bcG7-Lud0-IUts-l9ER-Gdx6-L9FjGl
      LV Write Access        read/write
      LV Creation host, time smash-os-gcpsg-openstreetmap-001, 2022-06-08 12:39:47 +0000
      LV Status              NOT available
      LV Size                <2.00 TiB
      Current LE             524287
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto

可以看到未激活的状态

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root@lvm-restore-test:~# lvscan
  inactive          '/dev/vg0/data' [<2.00 TiB] inherit

激活vg

使用 vgchange -ay 参数激活vg

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root@lvm-restore-test:~# vgchange -ay vg0
  1 logical volume(s) in volume group "vg0" now active
root@lvm-restore-test:~# lvdisplay
  --- Logical volume ---
  LV Path                /dev/vg0/data
  LV Name                data
  VG Name                vg0
  LV UUID                nkzPK7-bcG7-Lud0-IUts-l9ER-Gdx6-L9FjGl
  LV Write Access        read/write
  LV Creation host, time smash-os-gcpsg-openstreetmap-001, 2022-06-08 12:39:47 +0000
  LV Status              available
  # open                 0
  LV Size                <2.00 TiB
  Current LE             524287
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:0

参考

  1. migrate-lvm-or-volume-group-to-new-linux
  2. cluster_logical_volume_manager

原文作者：Momo

原文链接：https://mo.xmomo521.top/2022/06/20/使用快照备份迁移lvm/

发表日期：June 20th 2022, 2:36:41 pm

更新日期：June 20th 2022, 4:00:54 pm

版权声明：本文采用知识共享署名-非商业性使用 4.0 国际许可协议进行许可

CATALOG
  1. 1. 前言
  2. 2. 操作步骤
    1. 2.1. 使用快照, 备份磁盘
    2. 2.2. 创建虚拟机,并将快照挂载到虚拟机实例
    3. 2.3. 恢复LVM
      1. 2.3.1. 激活vg
  3. 3. 参考
Total : 133
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