I often think that if I went into marketing, I could have made millions.
But, it would have been selling stupid stuff that no one would use.
I have a system running Xen, and I was curious how to make the disk
bigger if I needed to. Here's how I did it. small is the name of the
host running dom0. It's also the name of the Physical Volume used by
LVM.
Installed Debian onto an LVM partition leaving 700GB not used, leaving it
for LVM based VMs using Xen.
small:/etc/xen-tools# lvscan
ACTIVE '/dev/small/root' [6.52 GB] inherit
ACTIVE '/dev/small/swap_1' [5.74 GB] inherit
ACTIVE '/dev/small/lvhome' [279.39 GB] inherit
Name Flags Part Type FS Type
[Label] Size (MB)
----------------------------------------------------------------------------------------------------------
sda1 Boot Primary Linux ext3
254.99
sda2 Primary Linux LVM
999947.29
Install Debian and xen-tools.
small:/etc/xen-tools# egrep -v '^#|^ *$' /etc/xen-tools/xen-tools.conf
lvm = small
Created a virtual machine that originally had 8Gb
xen-create-image --hostname=xen2.brie.com --size=8Gb --swap=2048Mb
--ip=192.168.1.106 --memory=1024Mb --arch=amd64
As you can see, the LVM partition only shows 8Gb
small:/etc/xen-tools# lvscan
ACTIVE '/dev/small/xen2.brie.com-swap' [2.00 GB] inherit
ACTIVE '/dev/small/xen2.brie.com-disk' [8.00 GB] inherit
Shut down the VM. I think you can actually do this to a live VM, but for
this, I just shut it down. No need to pull out the scalpel for this one.
# xm shutdown xen2.brie.com
Add the extra space to the Logical Volume used by the xen2 VM.
# lvextend -L +4G /dev/small/xen2.brie.com-disk
fsck the partition
# e2fsck -f /dev/small/xen2.brie.com-disk
Resize it!
# resize2fs /dev/small/xen2.brie.com-disk
Start my VM with its additional disk space!
# xm create /etc/xen/xen2.brie.com
Is that trick or what?
brian
--
Brian Lavender
http://www.brie.com/brian/
"Those that fail to learn from history, are doomed to repeat it."
- Winston Churchill
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