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Re: [Xen-users] Using lvm for domUs

To: "john maclean" <jayeola@xxxxxxxxx>
Subject: Re: [Xen-users] Using lvm for domUs
From: "Lars Roland" <lroland@xxxxxxxxx>
Date: Wed, 9 May 2007 11:42:53 +0200
Cc: Xen Users <xen-users@xxxxxxxxxxxxxxxxxxx>
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On 4/30/07, john maclean <jayeola@xxxxxxxxx> wrote:
Hey chaps. What's the best way to populate an lvm to get it ready for xen?

If you can live with not having the root partition of the guest as a
LVM then it is easy to get full LVM in the guest. Just install the
guest as usual then do somthing like this in dom0:
dd if=/dev/zero of=/var/xen/domains/guest/sdd.img bs=1M count=5120

add the disk image to the guests xen config file
disk    = [...,'file:/var/xen/domains/guest/sdd.img,sdd,w' ]

shutdown and start the guest, so it uses the new disk image
xm shutdown guest
xm create guest

Finally create volume group "vg" and logical volume "data", by
executing the following in the guest:
cfdisk /dev/sdd # create sdd1 and set its type to: "Linux LVM"
pvcreate /dev/sdd1
vgcreate vg /dev/sdd1
lvcreate -L 1G -n data vg
mkfs.xfs /dev/vg/data
mount /dev/mapper/vg-data /mnt/data

That should be it

Lars Roland

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