lvm 通过扩容本身磁盘容量扩容

场景：sdb之前是3G容量，现在扩容了sdb的容量到8G。现在把新扩容的5G容量扩展到现有的逻辑卷中

[root@localhost ~]# pvresize /dev/sdb

  Physical volume "/dev/sdb" changed

  1 physical volume(s) resized / 0 physical volume(s) not resized

[root@localhost ~]# pvdisplay 

  --- Physical volume ---

  PV Name               /dev/sdb

  VG Name               domuvg

  PV Size               8.00 GiB / not usable 3.00 MiB

  Allocatable           yes 

  PE Size               4.00 MiB

  Total PE              2047

  Free PE               1280

  Allocated PE          767

  PV UUID               Do2B23-Mg1v-z5JX-6NoJ-sXIk-Smwy-uR7IoE

[root@localhost ~]# vgdisplay 

  --- Volume group ---

  System ID             

  Format                lvm2

  Metadata Areas        1

  Metadata Sequence No  6

  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               8.00 GiB

  Alloc PE / Size       767 / 3.00 GiB

  Free  PE / Size       1280 / 5.00 GiB

  VG UUID               4Shwbf-0m2N-3icW-cEil-6W5x-JNLS-bXCZ7W

[root@localhost ~]# lvextend -l +100%FREE /dev/domuvg/alidata

  Size of logical volume domuvg/alidata changed from 2.00 GiB (511 extents) to 7.00 GiB (1791 extents).

  Logical volume alidata successfully resized

[root@localhost ~]# lvdisplay 

  --- Logical volume ---

  LV Path                /dev/domuvg/swap

  LV Name                swap

  VG Name                domuvg

  LV UUID                xZdi63-3wLm-rKE5-1EYh-0Q7p-bHZM-oibkoj

  LV Write Access        read/write

  LV Creation host, time localhost.localdomain, 2015-10-08 15:10:14 +0800

  LV Status              available

  # open                 1

  LV Size                1.00 GiB

  Current LE             256

  Segments               1

  Allocation             inherit

  Read ahead sectors     auto

  - currently set to     256

  Block device           253:0

  LV Path                /dev/domuvg/alidata

  LV Name                alidata

  LV UUID                g2pjLY-epuy-2Ba0-eBLc-EjIr-sSAO-mt8VOF

  LV Creation host, time localhost.localdomain, 2015-10-08 15:10:15 +0800

  LV Size                7.00 GiB

  Current LE             1791

  Block device           253:1

[root@localhost ~]# resize2fs /dev/domuvg/alidata

resize2fs 1.41.12 (17-May-2010)

Filesystem at /dev/domuvg/alidata is mounted on /alidata; on-line resizing required

old desc_blocks = 1, new_desc_blocks = 1

Performing an on-line resize of /dev/domuvg/alidata to 1833984 (4k) blocks.

The filesystem on /dev/domuvg/alidata is now 1833984 blocks long.

[root@localhost ~]# df -Ph

Filesystem                  Size  Used Avail Use% Mounted on

/dev/sda2                   7.3G 1020M  5.9G  15% /

tmpfs                       939M     0  939M   0% /dev/shm

/dev/mapper/domuvg-alidata  6.9G  4.5M  6.6G   1% /alidata

本文转自 freeterman 51CTO博客，原文链接：http://blog.51cto.com/myunix/1700899，如需转载请自行联系原作者