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如何將VPS（LVM）上的儲存空間從9GB擴展到40GB

tag-icon • tag-icon 14.04 partitioning lvm vps
如何將VPS（LVM）上的儲存空間從9GB擴展到40GB

我的虛擬機配備了 9GB 設置，但驅動器為 60GB。我正在嘗試將其擴展到完整尺寸。我必須在多台伺服器上執行此操作。我嘗試按照其他地方的指南進行操作，但是在建立新分割區時我收到了此訊息。

如果要建立四個以上分割區，必須先將主分割區替換為擴充分割區。

以下是一些您可能會覺得有用的信息。

root@ubuntu:~# df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            2.0G  4.0K  2.0G   1% /dev
tmpfs           396M  584K  395M   1% /run
/dev/dm-0        57G  3.0G   52G   6% /
none            4.0K     0  4.0K   0% /sys/fs/cgroup
none            5.0M     0  5.0M   0% /run/lock
none            2.0G     0  2.0G   0% /run/shm
none            100M     0  100M   0% /run/user
/dev/sda1       134M   68M   57M  55% /boot

root@ubuntu:~# fdisk -l

Disk /dev/sda: 62.9 GB, 62914560000 bytes
64 heads, 32 sectors/track, 60000 cylinders, total 122880000 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 identifier: 0x00096132

Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      292863      145408   83  Linux
/dev/sda2          292864     2246655      976896   82  Linux swap / Solaris
/dev/sda3         2246656    20969471     9361408   8e  Linux LVM
/dev/sda4        20969472   122879999    50955264   8e  Linux LVM

Disk /dev/mapper/CAC_VG-CAC_LV: 61.8 GB, 61761126400 bytes
255 heads, 63 sectors/track, 7508 cylinders, total 120627200 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 identifier: 0x00000000

Disk /dev/mapper/CAC_VG-CAC_LV doesn't contain a valid partition table`

任何幫助將不勝感激。如果您需要更多信息，請隨時詢問。我會看整個早上。

謝謝

編輯-我實際上認為我之前運行的腳本有效並且確實擴展了驅動器，但一台伺服器存在分區錯誤，而另一台伺服器則沒有。

編輯 - Fstab 輸出

root@ubuntu:~# cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
/dev/mapper/CAC_VG-CAC_LV /               ext4    errors=remount-ro 0      1  
# /boot was on /dev/sda1 during installation
UUID=1d92b194-7885-4b25-a4ba-a7b8683229e1 /boot           ext4  defaults 0 2
# swap was on /dev/sda2 during installation
UUID=be7625e5-2e2c-41f2-8d5f-331f90980b9e none            swap    sw  0 0
/dev/fd0        /media/floppy0  auto    rw,user,noauto,exec,utf8 0       0

pv顯示和vg顯示

root@ubuntu:~# vgdisplay
  --- Volume group ---
  VG Name               CAC_VG
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  7
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               1
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               57.52 GiB
  PE Size               4.00 MiB
  Total PE              14725
  Alloc PE / Size       14725 / 57.52 GiB
  Free  PE / Size       0 / 0
  VG UUID               A4SRwW-Vqpz-qRLf-iXIm-yKny-tcyI-wYTMdg

root@ubuntu:~# pvdisplay
  --- Physical volume ---
  PV Name               /dev/sda3
  VG Name               CAC_VG
  PV Size               8.93 GiB / not usable 2.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              2285
  Free PE               0
  Allocated PE          2285
  PV UUID               al3A0j-NEpg-yjRd-2yzF-pMUm-fa42-XdcZmc

  --- Physical volume ---
  PV Name               /dev/sda4
  VG Name               CAC_VG
  PV Size               48.59 GiB / not usable 1.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              12440
  Free PE               0
  Allocated PE          12440
  PV UUID               phIhtw-wze3-IOTU-oiik-586P-ecJP-5KY913

編輯-據說要運行的腳本雲主機的輸出

root@ubuntu:~# sh zang.sh
Error: Can't create any more partitions.
Error: Partition doesn't exist.
partition: none, disk: /dev/sda, lower: 0, upper: 0
/dev/sda: partition table type 'dos' detected
partx: /dev/sda: adding partition #1 failed: Device or resource busy
partx: /dev/sda: adding partition #2 failed: Device or resource busy
partx: /dev/sda: adding partition #3 failed: Device or resource busy
partx: /dev/sda: adding partition #4 failed: Device or resource busy
partx: /dev/sda: error adding partitions 1-4
  Device /dev/sda5 not found (or ignored by filtering).
  Device /dev/sda5 not found (or ignored by filtering).
  Unable to add physical volume '/dev/sda5' to volume group 'CAC_VG'.
  New size (9725 extents) matches existing size (9725 extents)
  Run `lvextend --help' for more information.
resize2fs 1.42.9 (4-Feb-2014)
The filesystem is already 9958400 blocks long.  Nothing to do!

正如你所看到的，它看起來不起作用，但登入時我從這裡開始

Usage of /:  13.1% of 8.66GB   to    Usage of /:   3.1% of 37.27GB

再次感謝您的幫忙。

答案1

該過程相當簡單，甚至應該可以在正在運行的系統上運行。牢記「應該」這個詞。通常情況下，程序如下：

  • 首先調整您需要調整大小的 LVM 的大小： sudo lvresize -l 100%FREE /dev/vg00/myvolume 這告訴 LVM 用完所有可用空間來擴大磁碟區/dev/vg00/myvolume
  • 現在您需要調整其中包含的檔案系統的大小：sudo resize2fs /dev/vg00/myvolume 它應該會偵測到您已安裝磁碟，然後使用它的線上調整大小模式。

就是這樣...你就完成了。

我是否告訴過您在執行所有操作之前先備份資料？在這裡：在執行此操作之前備份資料。

請注意，您的輸出顯示磁碟區約為 61.8GB。兩者的輸出lvdisplay以及vgdisplay的內容 /etc/fstab可能會提供有關您的系統的附加資訊。我也不太確定為什麼你有兩個 LVM 標記的分割區。這些是你創造的嗎？

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