Linux LVM在线扩容

环境：

虚拟化环境，SUSE Linux Enterprise
Server 11sp3，直接把虚拟磁盘从100G改成150G。

现有的LVM是100G，/home
的LV需要再加50G。

步骤：

fdisk
先把多加的50G分成一个区，再把该区划成pv，把该pv加到vg里面，再扩LV，最后扩文件系统。

LVM在线扩容" title="Linux LVM在线扩容">

 Last login:
Sat Mar 28 16:29:42 2015 from 10.31.29.10

xickDB:~ # df
-h 

Filesystem  
     
      Size
 Used Avail Use% Mounted on

/dev/mapper/system-root
 9.9G  5.2G
 4.2G  56% /

udev  
     
     
      1.9G
 100K  1.9G   1%
/dev

tmpfs  
     
     
     9.0G
  72K  9.0G   1%
/dev/shm

/dev/sda1  
     
     
 152M   81M  
63M  57% /boot

/dev/mapper/system-home
  25G   13G  
11G  55% /home

xickDB:~ # fdisk
-l 

Disk /dev/sda: 161.1 GB,
161061273600 bytes

255 heads, 63 sectors/track,
19581 cylinders, total 314572800 sectors

... ...

Disk /dev/mapper/system-swap
doesn't contain a valid partition table

xickDB:~ #
vgdisplay 

  --- Volume
group ---

  VG Name
     
     
  system

  System ID
     
   
  

  Format
     
     
   lvm2

  ...
...

  VG Size
     
     
  99.84 GiB

  PE Size
     
     
  4.00 MiB

  Total PE
     
     
 25560

  Alloc PE /
Size       11008
/ 43.00 GiB

  Free
 PE / Size    
  14552 / 56.84 GiB

  VG UUID
     
     
 
jarXED-0N3v-sey6-P4Rl-tLhp-gJtL-HJ11DB

 
 

xickDB:~ # fdisk
/dev/sda

Command (m for help):
n

Command action

 
 e   extended

 
 p   primary partition
(1-4)

p

Partition number (1-4, default
3): 

Using default value
3

First sector
(209715200-314572799, default
209715200): 

Using default value
209715200

Last sector, +sectors or
+size{K,M,G} (209715200-314572799, default
314572799): 

Using default value
314572799

Command (m for help):
p

Disk /dev/sda: 161.1 GB,
161061273600 bytes

255 heads, 63 sectors/track,
19581 cylinders, total 314572800 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:
0x0009d2de

 
 Device Boot    
 Start    
    End  
   Blocks   Id
 System

/dev/sda1   *
     
 2048    
 321535    
 159744   83
 Linux

/dev/sda2  
     
 321536   209715199
  104696832   8e
 Linux LVM

/dev/sda3  
    209715200  
314572799    52428800
  83  Linux

Command (m for help):
w

The partition table has been
altered!

xickDB:~ #
reboot 

Broadcast message from root
(pts/1) (Sat Mar 28 16:37:26 2015):

The system is going down for
reboot NOW!

Last login: Sat Mar 28 16:29:59
2015 from 10.31.29.10

xickDB:~
# 

xickDB:~ # fdisk
-l 

Disk /dev/sda: 161.1 GB,
161061273600 bytes

255 heads, 63 sectors/track,
19581 cylinders, total 314572800 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:
0x0009d2de

 
 Device Boot    
 Start    
    End  
   Blocks   Id
 System

/dev/sda1   *
     
 2048    
 321535    
 159744   83
 Linux

/dev/sda2  
     
 321536   209715199
  104696832   8e
 Linux LVM

/dev/sda3  
    209715200  
314572799    52428800
  83  Linux

... ...

xickDB:~ # pvs

  PV
     
  VG     Fmt
 Attr PSize
 PFree 

  /dev/sda2
 system lvm2 a--  99.84g
56.84g

xickDB:~ # pvcreate
/dev/sda3

  Physical
volume "/dev/sda3" successfully created

xickDB:~ # pvs

  PV
     
  VG     Fmt
 Attr PSize
 PFree 

  /dev/sda2
 system lvm2 a--  99.84g
56.84g

  /dev/sda3
     
  lvm2 a--  50.00g
50.00g

xickDB:~ # vgextend system
/dev/sda3

  Volume group
"system" successfully extended

xickDB:~ #
vgdisplay 

  --- Volume
group ---

  VG Name
     
     
  system

  System ID
     
   
  

  Format
     
     
   lvm2

  Metadata
Areas      
 2

  Metadata
Sequence No  5

  VG Access
     
     
read/write

  VG Status
     
     
resizable

  MAX LV
     
     
   0

  Cur LV
     
     
   3

  Open LV
     
     
  3

  Max PV
     
     
   0

  Cur PV
     
     
   2

  Act PV
     
     
   2

  VG Size
     
     
  149.84 GiB

  PE Size
     
     
  4.00 MiB

  Total PE
     
     
 38359

  Alloc PE /
Size       11008
/ 43.00 GiB

  Free
 PE / Size    
  27351 / 106.84 GiB

  VG UUID
     
     
 
jarXED-0N3v-sey6-P4Rl-tLhp-gJtL-HJ11DB

 
 

xickDB:~ # lvs

  LV
  VG     Attr
     LSize
 Pool Origin Data%  Move Log
Copy%  Convert

  home system
-wi-ao--- 25.00g    
     
     
     
     
     
     
  

  root system
-wi-ao--- 10.00g    
     
     
     
     
     
     
  

  swap system
-wi-ao---  8.00g  
     
     
     
     
     
     
 
  

xickDB:~ # lvextend
--help 

  lvextend:
Add space to a logical volume

lvextend

 
     
[-A|--autobackup y|n]

 
      [--alloc
AllocationPolicy]

 
     
[-d|--debug]

 
     
[-f|--force]

 
     
[-h|--help]

 
     
[-i|--stripes Stripes [-I|--stripesize StripeSize]]

 
     
{-l|--extents [+]LogicalExtentsNumber[%{VG|LV|PVS|FREE|ORIGIN}]
|

 
     
 -L|--size
[+]LogicalVolumeSize[bBsSkKmMgGtTpPeE]}

 
     
[-m|--mirrors Mirrors]

 
     
[--nosync]

 
     
[--use-policies]

 
     
[-n|--nofsck]

 
     
[--noudevsync]

 
     
[-r|--resizefs]

 
     
[-t|--test]

 
      [--type
VolumeType]

 
     
[-v|--verbose]

 
     
[--version]

 
     
LogicalVolume[Path] [ PhysicalVolumePath... ]

xickDB:~ # lvextend --size +50G
/dev/mapper/system-home 

  Extending
logical volume home to 75.00 GiB

  Logical
volume home successfully resized

xickDB:~ # lvs

  LV
  VG     Attr
     LSize
 Pool Origin Data%  Move Log
Copy%  Convert

  home system
-wi-ao--- 75.00g    
     
     
     
     
     
     
  

  root system
-wi-ao--- 10.00g    
     
     
     
     
     
     
  

  swap system
-wi-ao---  8.00g  
     
     
     
     
     
     
 
  

 
 

xickDB:~ # resize2fs
/dev/mapper/system-home 

resize2fs 1.41.9
(22-Aug-2009)

Filesystem at
/dev/mapper/system-home is mounted on /home; on-line resizing
required

old desc_blocks = 2,
new_desc_blocks = 5

Performing an on-line resize of
/dev/mapper/system-home to 19660800 (4k) blocks.

The filesystem on
/dev/mapper/system-home is now 19660800 blocks long.

xickDB:~ # df
-h 

Filesystem  
     
      Size
 Used Avail Use% Mounted on

/dev/mapper/system-root
 9.9G  5.2G
 4.2G  56% /

udev  
     
     
      1.9G
 104K  1.9G   1%
/dev

tmpfs  
     
     
     9.0G
  72K  9.0G   1%
/dev/shm

/dev/sda1  
     
     
 152M   81M  
63M  57% /boot

/dev/mapper/system-home
  74G   13G  
58G  19% /home