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Re: [Xen-users] what's correct way of shrinking LVM based domU?

To: Jean Charles Delepine <delepine@xxxxxxxxxxxxx>
Subject: Re: [Xen-users] what's correct way of shrinking LVM based domU?
From: John Haxby <john.haxby@xxxxxxxxxx>
Date: Tue, 24 Jun 2008 12:34:16 +0100
Cc: Rudi Ahlers <Rudi@xxxxxxxxxxx>, xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
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Jean Charles Delepine wrote:
Rudi Ahlers <Rudi@xxxxxxxxxxx> écrivait (wrote) :

This is what I have:

[root@cPanel002 ~]# [root@HF-LINSRV01 ~]# lvscan
 ACTIVE            '/dev/data/cpanel002' [100.00 GB] inherit
 ACTIVE            '/dev/data/windows2003_web' [30.00 GB] inherit
 ACTIVE            '/dev/data/storage' [50.00 GB] inherit
 ACTIVE            '/dev/data/cacti' [20.00 GB] inherit
 ACTIVE            '/dev/data/cpanel2' [30.00 GB] inherit
 ACTIVE            '/dev/system/root' [39.06 GB] inherit
 ACTIVE            '/dev/system/swap' [9.75 GB] inherit


I need to resize the 100GB /dev/data/cpanel002

1) shutdown the domu : xm shutdown 'name of domu'
   wait for the domu to be shutdown  (xm list)
2) reduce the filesystem : If it's ext3 :
      e2fsck -f -y /dev/data/cpanel00
      resize2fs -p /dev/data/cpanel00 90G
It's not, it's a disk image with two paritions, one of which is ext3, the other is a physical volume. That's what makes it so complicated.
3) reduce the logical volume :
      lvreduce -L 90G /dev/data/cpanel00

4) restart the domu.

              Jean Charles


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