Actually, I'd also be interested in any docs or information relating to LVM
with COW as an alternative to loopback images. If I want to be able to shift
my VM images about, can I do it with LVM? The section on this in the manual
(5.2) is a little sparse on this subject to say the least! Guess you're all
too busy coding :o)
Cheers,
Paul
On Tuesday 28 September 2004 07:23 am, Paul Dorman wrote:
> Hi all,
>
> I wonder if anyone on the list has written any scripts to automate the
> management of VMs with loopback images. Here's what I want to be able to
> do:
>
> * Store existing physical machine file systems, or pristine installs in
> loopback images on my Xen servers (something I'll do manually)
>
> * Run a script that will start a VM from one of these images, automatically
> associate it with a loopback device, give it a name, RAM allocation,
> network addresses, and set various internal parameters, such as hostname,
> routes, etc., based on a set of arguments. So something like "script
> <imagename> <hostname> <netconfigs> <RAM> <.. etc.
>
> * Have the same script take another argument that will cause it to clone a
> filesystem image first before starting the VM, so that I can use a set of
> images as VM templates. I intend to have a large collection of templates
> which my developers can use to create VMs suited to whatever project they
> are working on.
>
> * After a VM machine has been instantiated, I would like to be able to
> start and stop it with simple "start hostname" and "stop hostname" kinds of
> commands.
>
> * Have management tools so that I can for example shift a VM from one Xen
> server to another (shift hostname xenservername). These would also be used
> by load balancing scripts to shift machines around to manage resources.
>
> I'd like to build a web-based management system for these scripts, so that
> developers are free to create and control Xen VMs (though naturally with
> limitations based on what the servers can handle -- so my bosses will know
> when they need to buy me more servers :o) ).
>
> I don't see these as particularly difficult, but if someone has done them
> already .... Also, I'd appreciate any thoughts you might have on automation
> of this kind, particularly in terms of functionality and practicalities.
>
> Thanks for your time!
>
> Paul
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