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如何将 VPS (LVM) 上的存储空间从 9GB 扩展到 40GB

tag-icon • tag-icon 14.04 partitioning lvm vps
如何将 VPS (LVM) 上的存储空间从 9GB 扩展到 40GB

我的虚拟机带有 9GB 设置，但驱动器只有 60GB。我试图将其扩展到最大容量。我必须在多台服务器上执行此操作。我尝试按照其他地方的指南操作，但在创建新分区时收到此消息。

如果要创建超过 4 个分区，则必须先用扩展分区替换主分区。

这里有一些你可能会觉得有用的信息。

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`

任何帮助都将不胜感激。如果您需要更多信息，请随时询问。我会一上午都在看。

谢谢

编辑-我实际上认为我之前运行的脚本有效并且确实扩展了驱动器，但是一台服务器存在该分区错误，而另一台服务器没有。

编辑-Fstab 输出

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

pvdisplay 和 vgdisplay

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

编辑-脚本云主机的输出表示运行

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，它看起来不起作用，但是当我登录时，我从这里

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

再次感谢您的帮助。

答案1

该过程相当简单，甚至可以在正在运行的系统上运行。请记住“应该”这个词。通常，该过程如下：

  • 首先调整需要调整大小的 LVM： sudo lvresize -l 100%FREE /dev/vg00/myvolume 这告诉 LVM 使用所有可用空间来扩大卷/dev/vg00/myvolume
  • 现在您需要调整其中包含的文件系统的大小：sudo resize2fs /dev/vg00/myvolume 它应该检测您是否已安装磁盘，然后使用它的在线调整大小模式。

就这样...你已经完成了。

我有没有告诉过你在做这些事情之前要备份你的数据？好了，在做这些事情之前，先备份你的数据。

请注意，您的输出显示卷大约为 61.8GB。 的输出lvdisplay和vgdisplay的内容 /etc/fstab可能会提供有关您的系统的其他信息。我也不太清楚为什么您有两个 LVM 标记分区。您创建了这些分区吗？

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