Johan Huysmans wrote:
well... it is possible ;)
because we are allready doing this for over a year.
The word on the street (from Dan Berrange) is that this feature is not
guaranteed to work in future
versions of Xen.
--Michael
And the installation is quite simple:
* you create your logical volumes in the dom0 and mount them
* you install a minimal system with yum --installroot=
* you create a xen config where you map the logical volumes to the
partition inside the domU.
The installation instructions can be found on my blog:
http://www.raskas.be/blog/howtos/centos-base-image/
And this is how the disk section of my xen config looks like:
disk = ['phy:vm_volumes/root-host1,sda1,w'
,'phy:vm_volumes/swap-host1,sda2,w'
,'phy:vm_volumes/tmp-host1,sda3,w'
,'phy:vm_volumes/varlog-host1,sda6,w'
,'phy:vm_volumes/home-host1,sda7,w'
]
It would be really great if this would be possible to do with koan,
for now we do this with our own create vhost script.
Greetings,
Johan
On 9/4/07, Michael DeHaan <mdehaan@xxxxxxxxxx> wrote:
Johan Huysmans wrote:
I noticed the koan parameter --virt-path and tried creating a vhost
with following command:
koan --server <some-ip> --virt --profile CentOS5-xen-i386 -P VolGroup00
The profile and kickstart files are generated by an import from the CentOs5 DVD.
This command creates 1 lv. The domU uses this as a disk (xvda) and
creates partitions on this.
It is working, but not really the thing i want.
I want that koan will create multiple lv's on the dom0. Each lv on
dom0 is a partition on domU. This means that the lv is directly
formatted in the dom0, and you can mount that logical volume like a
normal lv (it IS a normal volume) in the dom0.
Is this (allready) possible with koan (or virt-inst)?
I believe you are stuck with the extra level of indirection -- that is
that partitions in your host (dom0) appear
as disks in your domU -- with both tools. I don't think you can feed a
partition up without a corresponding virtual disk :)
(Note that you don't have to use LVM for this -- regular partitions work
too)
--Michael
Greetings,
Johan Huysmans
On 9/4/07, Michael DeHaan <mdehaan@xxxxxxxxxx> wrote:
Johan Huysmans wrote:
Hi All,
In March this year Fred posted a request on this mailinglist:
http://www.redhat.com/archives/et-mgmt-tools/2007-March/msg00119.html
Implemented.
See the documentation for --virt-path in the koan manpage.
What is the status of this request, is it working in the latest version of koan?
I noticed that it is now possible to use a logical volume as a disk,
but it is also possible to use logical volumes on dom0 as partitions
on domU?
There are three ways storage can be specified:
-- basic disk images on the filesystem (default behavior)
-- specifying a logical volume group that has free space in it, where
then koan will carve a paritition out of it named after the virtual machine
This allows for using a common LVM group for all your virtual machines,
which is rather useful.
-- specifying a specific partition for koan to use as storage.
I hope that answers the question!
Recently a few folks have been asking for ways to specify multiple
"disks" for their configurations ... and that's something I am going to
be looking at.
Thanks for the information,
Johan Huysmans
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