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如何使用parted删除lvm并创建新的扩展？

tag-icon • tag-icon centos partition lvm kvm parted
如何使用parted删除lvm并创建新的扩展？

我在 Proxmox 上安装了 CentoS 6 KVM VM，具有以下磁盘配置。

谁能指导我如何使用parted删除当前的/dev/sda2，然后将其添加回来，将磁盘空间从10GB扩展到25GB。

parted /dev/sda print输出

[root@ip52 ~]# parted /dev/sda print
Model: QEMU QEMU HARDDISK (scsi)
Disk /dev/sda: 53.7GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  525MB   524MB   primary  ext4         boot
 2      525MB   10.7GB  10.2GB  primary               lvm

fdisk -l输出

[root@ip126 ~]# fdisk -l

Disk /dev/sda: 26.8 GB, 26843545600 bytes
64 heads, 32 sectors/track, 25600 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00086c7a

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           2         501      512000   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2             502       10240     9972736   8e  Linux LVM
Partition 2 does not end on cylinder boundary.

Disk /dev/mapper/VolGroup-lv_root: 9168 MB, 9168748544 bytes
255 heads, 63 sectors/track, 1114 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000


Disk /dev/mapper/VolGroup-lv_swap: 1040 MB, 1040187392 bytes
255 heads, 63 sectors/track, 126 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

pvdisplay输出

[root@ip126 ~]# pvdisplay
  --- Physical volume ---
  PV Name               /dev/sda2
  VG Name               VolGroup
  PV Size               9.51 GiB / not usable 3.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              2434
  Free PE               0
  Allocated PE          2434
  PV UUID               2lmvRB-u3AL-DYAX-2Azh-HsHE-skwW-3hewTE

vgdisplay输出

[root@ip126 ~]# vgdisplay
  --- Volume group ---
  VG Name               VolGroup
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               9.51 GiB
  PE Size               4.00 MiB
  Total PE              2434
  Alloc PE / Size       2434 / 9.51 GiB
  Free  PE / Size       0 / 0
  VG UUID               tp0a2o-Hkup-3V0m-01K1-udfY-Y2l2-gTMHjg

lvdisplay输出

[root@ip126 ~]# lvdisplay
  --- Logical volume ---
  LV Path                /dev/VolGroup/lv_root
  LV Name                lv_root
  VG Name                VolGroup
  LV UUID                9xV22O-69gz-fib7-t3tF-ksqc-LWhj-KLYful
  LV Write Access        read/write
  LV Creation host, time localhost.localdomain, 2018-05-23 09:31:01 -0400
  LV Status              available
  # open                 1
  LV Size                8.54 GiB
  Current LE             2186
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

  --- Logical volume ---
  LV Path                /dev/VolGroup/lv_swap
  LV Name                lv_swap
  VG Name                VolGroup
  LV UUID                0iRAF9-rF8Y-kpn2-rPyV-fnAW-Q2vq-aK2ODT
  LV Write Access        read/write
  LV Creation host, time localhost.localdomain, 2018-05-23 09:31:02 -0400
  LV Status              available
  # open                 1
  LV Size                992.00 MiB
  Current LE             248
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1

答案1

对我来说最简单的方法是

  1. 添加新分区/dev/sda3（例如）。为此，您可以使用 fdisk。
  2. 在此分区上创建PVpvcreate /dev/sda3
  3. 将此PV添加到VG中vgextend VolGroup /dev/sda3
  4. 添加新 LV：lvcreate -L 5G VolGroup VolGroup _newvolume这将创建新卷，名为 VolGroup _newvolume，大小 5GB
  5. 扩展现有卷：lvextend -L +5G /dev/VolGroup/lv_root; resize2fs /dev/VolGroup/lv_root此命令会将 lv_root 扩展 5GB

然后扩展 LV 或创建新的 LV

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