/dev/sdb之前是3G容量，现在扩容了sdb的容量到8G，需要将新扩容的5G容量扩展到现有的逻辑卷中。

image.png

# pvresize /dev/sdb
  Physical volume "/dev/sdb" changed
  1 physical volume(s) resized / 0 physical volume(s) not resized

# pvdisplay 
  --- Physical volume ---
  PV Name               /dev/sdb
  VG Name               vg_data
  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

 

# vgdisplay 
  --- Volume group ---
  VG Name               vg_data
  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
  PE Size               4.00 MiB
  Total PE              2047
  Alloc PE / Size       767 / 3.00 GiB
  Free  PE / Size       1280 / 5.00 GiB
  VG UUID               4Shwbf-0m2N-3icW-cEil-6W5x-JNLS-bXCZ7W

#   lvextend -l +100%FREE   /dev/vg_data/lv_data

  Size of logical volume domuvg/lv_data changed from 2.00 GiB (511 extents) to 7.00 GiB (1791 extents).
  Logical volume lv_data successfully resized

# lvdisplay 
  --- Logical volume ---
  LV Path                /dev/vg_data/swap
  LV Name                swap
  VG Name               vg_data
  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
   
  --- Logical volume ---
  LV Path                /dev/vg_data/lv_data
  LV Name                lv_ata
  VG Name               vg_data
  LV UUID                g2pjLY-epuy-2Ba0-eBLc-EjIr-sSAO-mt8VOF
  LV Write Access        read/write
  LV Creation host, time localhost.localdomain, 2015-10-08 15:10:15 +0800
  LV Status              available
  # open                 1
  LV Size                7.00 GiB
  Current LE             1791
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1

 

# resize2fs   /dev/vg_data/lv_data
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/vg_data/lv_data is mounted on /data; on-line resizing required
old desc_blocks = 1, new_desc_blocks = 1
Performing an on-line resize of /dev/vg_data/lv_data to 1833984 (4k) blocks.
The filesystem on  /dev/vg_data/lv_data is now 1833984 blocks long.

 

# 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/vg_data-lv_data  6.9G  4.5M  6.6G   1% /data

参考

物理硬盘增加容量的LVM扩容
https://www.jianshu.com/p/752af350d6dc

How to resize/expand an Ubuntu LVM disk？
https://kb.vander.host/disk-management/how-to-resize-expand-an-ubuntu-lvm-disk/

How to extend root filesystem using LVM on Linux
https://computingforgeeks.com/extending-root-filesystem-using-lvm-linux