发布于 2024-05-30 03:21 IP属地河南省

linux lvm卷扩容磁盘大小

目的：扩展/dev/mapper/真实路径卷

前提：虚拟机已增加一块40G硬盘。

1、查看增加的硬盘信息

  [root@zzzzzz ~]# fdisk -l

Disk /dev/vdb: 42.9 GB, 42949672960 bytes
16 heads, 63 sectors/track, 83220 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

2、硬盘分区、格式化(指定文件系统)

  [root@zzzzzz ~]# fdisk /dev/vdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklab
el
Building a new DOS disklabel with disk identifier 0x1e92d533.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-83220, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-83220, default 83220):
Using default value 83220

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@ggzymb ~]# partprobe
Warning: WARNING: the kernel failed to re-read the partition table on /dev/sda (
Device or resource busy).  As a result, it may not reflect all of your changes u
ntil after reboot.
Warning: WARNING: the kernel failed to re-read the partition table on /dev/vda (
Device or resource busy).  As a result, it may not reflect all of your changes u
ntil after reboot.

  [root@zzzzzz ~]# mkfs.ext4 /dev/vdb1
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
2621440 inodes, 10485712 blocks
524285 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
320 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000, 7962624

Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 33 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.
[root@zzzzz ~]#

3、转换/dev/vdb1分区为PV

  [root@zzzzzz ~]# pvcreate /dev/vdb1
  Physical volume "/dev/vdb1" successfully created

4、查看系统所有pv，这里vdb1已成功转换

  [root@zzzzzz ~]# pvdisplay
  --- Physical volume ---
  PV Name               /dev/vda2
  VG Name               真实路径
  PV Size               199.80 GiB / not usable 3.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              51149
  Free PE               0
  Allocated PE          51149
  PV UUID               md802e-NvFL-eI1I-S9XN-55iy-pWRP-lIOmtU

  "/dev/vdb1" is a new physical volume of "40.00 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/vdb1
  VG Name
  PV Size               40.00 GiB
  Allocatable           NO
  PE Size               0
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               dBhELv-37Zq-kGt5-GBEX-vMcF-GAhx-6CDXDA
[root@ggzymb ~]#

5、查看当前VG名称

  [root@zzzzzz ~]# vgdisplay |grep Name
  VG Name               真实路径

添加vdb1到VG：

  [root@zzzzzz ~]# vgextend 真实路径 /dev/vdb1
  Volume group "真实路径" successfully extended

查看VG情况，可以看到原有VG已扩展到240G：

  [root@zzzzzz ~]# vgdisplay
  --- Volume group ---
  VG Name               真实路径
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  6
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                4
  Open LV               4
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               239.80 GiB
  PE Size               4.00 MiB
  Total PE              61388
  Alloc PE / Size       51149 / 199.80 GiB
  Free  PE / Size       10239 / 40.00 GiB
  VG UUID               JFLsS9-8JET-g8xS-WxEw-8aFy-1Nxy-BGmI6B
[root@zzzzzz ~]#

6、调整分区容量，原来为79G，+40G调整为119G

  [root@zzzzzz ~]# lvextend -L 119G /dev/mapper/真实路径
  Size of logical volume 真实路径 changed from 80.00 GiB (20480
extents) to 119.00 GiB (30464 extents).
  Logical volume LogVol01_opt successfully resized.
[root@zzzzz ~]#
lvextend -l +100%FREE /dev/mapper/真实路径

7、执行重设大小，对当前分区有效：

  [root@zzzzzz ~]# resize2fs /dev/mapper/真实路径
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/mapper/真实路径 is mounted on /opt; on-line r
esizing required
old desc_blocks = 5, new_desc_blocks = 8
Performing an on-line resize of /dev/mapper/真实路径 to 31195136
 (4k) blocks.
The filesystem on /dev/mapper/真实路径 is now 31195136 blocks lo
ng.

8、确认已扩展成功：

  [root@zzzzzz ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_真实路径
                       73G  2.9G   66G   5% /
tmpfs                 7.8G  224K  7.8G   1% /dev/shm
/dev/vda1             190M   77M  103M  43% /boot
/dev/mapper/真实路径
                       30G   44M   28G   1% /home
/dev/mapper/真实路径
                      118G   60M  112G   1% /opt
/dev/sda1             985G   72M  935G   1% /iscsidata
[root@zzzzzz ~]#

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