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Re: [Xen-users] One Xen image multiple machines

  • To: Xen User-List <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: "Fajar A. Nugraha" <fajar@xxxxxxxxx>
  • Date: Tue, 30 Jun 2009 14:20:51 +0700
  • Delivery-date: Tue, 30 Jun 2009 00:21:40 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

On Tue, Jun 30, 2009 at 1:56 PM, Meir Hazon<Meir@xxxxxxxxxxx> wrote:
> I would like to have a One XEN read only image to be shared among many
> physical machines.
> I would also need to have a writable file system for /etc /var and /tmp.

In general I'd say don't bother, it's not worthed. Too much effort for
a normal linux user.

That being said, you can try:
- using opensolaris dom0, zfs-backed SAN/NAS, or any other SAN/NAS
capable of snapshot/clone (netapp comes to mind). The snapshot/clone
feature gives you the same (if not more) space saving as your setup.
- having a small "/" for each domU, and mount /usr separately, either
through nfs or by using the block device read only (both on domU
config file and fstab).

Note that both approach require you to be familiar with manual
template-based domU creation (i.e. not using virt-install or some
other GUI).


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