Re: [Xen-users] how to expand disk inside of domU?

[Donny Brooks <dbrooks@xxxxxxxxxxxxxxxx>]

 You will need to extend your lv and then expand the underlying filesystem. 
lvextend and resize2fs will be the tools you will want to use. 

With an img file I am not sure of the exact steps, but it can't be too hard. 
You will need to do this with the domu stopped.
 
-- 
 
Donny B. 
 
On Monday, April 26, 2010 09:12 AM CDT, Dan Waterloo <dan@xxxxxxx> wrote: 
 
> i'm trying to find a way to expand a selected partition in my DomU...
> 
> when in a console in the domU, here are the disks available:
> 
> [root@localhost ~]# df -h
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/mapper/VolGroup00-LogVol00
>                        13G  3.5G  8.1G  30% /
> /dev/xvda1             99M   21M   74M  22% /boot
> tmpfs                 257M     0  257M   0% /dev/shm
> 
> I'd like to expand the /dev/mapper/VolGroup00-LogVol00 disk to 25G
> 
> The domU is based on an image file, 'webs.img' that resides on a disk in 
> the Dom0.
> In the dom0, I add space to the webs.img file with the following command:
> 
> |dd if=/dev/zero bs=1024k count=12288 >> webs.img
> 
> then, when i create the webs domu, i.e. xm create webs;
> it starts, and the new space shows up as "unintialized' space | 
> in the domu. (I see this using vnc to reach the desktop, and 
> open the LVM tool to see the new space). 
> 
> The problem that I'm having is to 'attach' the unintialized space in the 
> domU to the /dev/mapper/VolGroup00-LogVol00 disk, and then to expand the 
> LogVol00 disk to take advantage of the space.
> 
> I'm running Centos5 on the dom0, and in the domU. Xen is version 3.
> 
> Any suggestions? if so, can you please be explicit as to _where_ to run the 
> various 
> commands, in the Dom0 or DomU? At this point, I'm pretty confused about 
> what to do where....
> 
> Thanks!
> 
> 
 
 


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