On Thu, Jan 22, 2009 at 10:34:22AM -0800, Brian Krusic wrote:
I've used virt-p2v many times with great success.
However I have an issue.
I've always converted hosts having small disks of around 35G over to domUs but have an issue were my current host in need of being virtualized has a physical disk of 400G but its / partition is only 35G, the rest of the drive is unallocated/unpartitioned and therefore unused.
[...]
I obviously don't want to migrate the entire 400G disk as it only has a 35G root partition (ext3, no LVMs in this case).
Oh dear, this is a problem :-(
The answer unfortunately is that virt-p2v currently doesn't support this - we can only migrate whole block devices.
Unfortunately even compression doesn't help very much here. Even if the disk is mainly zeroes, the gzip-based compression used doesn't compress very well, so you'll still have a longish wait. You can try selecting compression anyway to see if it helps.
It's on the long to-do list to fix this so that people can migrate partial disks (including just subdirectories, and excluding subdirectories).
BTW, if the disk doesn't use LVM, you will need to use version 0.9.9, uploaded to the website a few days ago, because that fixes a bug related to having the root partition not being on LVM.
Rich.
On Thu, 2009-01-22 at 20:24 +0000, Richard W.M. Jones wrote:
On Thu, Jan 22, 2009 at 10:34:22AM -0800, Brian Krusic wrote:
I've used virt-p2v many times with great success.
However I have an issue.
I've always converted hosts having small disks of around 35G over to domUs but have an issue were my current host in need of being virtualized has a physical disk of 400G but its / partition is only 35G, the rest of the drive is unallocated/unpartitioned and therefore unused.
[...]
I obviously don't want to migrate the entire 400G disk as it only has a 35G root partition (ext3, no LVMs in this case).
Oh dear, this is a problem :-(
The answer unfortunately is that virt-p2v currently doesn't support this - we can only migrate whole block devices.
As I understand Brian, the block device is whatever / is mounted on, a 25G partition, and it shouldn't matter how big the actual disk is containing the partition.
David
Hi David,
Well, my / is 25G however the image that gets produced is 400G.
The 400G is that actual size of my entire disk but I only have a 25G partition defined, the rest of the drive is blank other then for a small swap partition.
- Brian
On Jan 27, 2009, at 2:31 PM, David Lutterkort wrote:
On Thu, 2009-01-22 at 20:24 +0000, Richard W.M. Jones wrote:
On Thu, Jan 22, 2009 at 10:34:22AM -0800, Brian Krusic wrote:
I've used virt-p2v many times with great success.
However I have an issue.
I've always converted hosts having small disks of around 35G over to domUs but have an issue were my current host in need of being virtualized has a physical disk of 400G but its / partition is only 35G, the rest of the drive is unallocated/unpartitioned and therefore unused.
[...]
I obviously don't want to migrate the entire 400G disk as it only has a 35G root partition (ext3, no LVMs in this case).
Oh dear, this is a problem :-(
The answer unfortunately is that virt-p2v currently doesn't support this - we can only migrate whole block devices.
As I understand Brian, the block device is whatever / is mounted on, a 25G partition, and it shouldn't matter how big the actual disk is containing the partition.
David
On Tue, Jan 27, 2009 at 03:11:16PM -0800, Brian Krusic wrote:
Hi David,
Well, my / is 25G however the image that gets produced is 400G.
The 400G is that actual size of my entire disk but I only have a 25G partition defined, the rest of the drive is blank other then for a small swap partition.
We completely need a way to manipulate disk images - eg. resize LVM partitions, read out data from filesystems nested inside partitions inside LVM, etc etc. In other words, a non-broken gparted.
virt-df has much of the machinery required to do this.
Turn it into a library, package it up ... If only I had the time.
Rich.
On Tue, Jan 27, 2009 at 10:31:44PM +0000, David Lutterkort wrote:
On Thu, 2009-01-22 at 20:24 +0000, Richard W.M. Jones wrote:
On Thu, Jan 22, 2009 at 10:34:22AM -0800, Brian Krusic wrote:
I've used virt-p2v many times with great success.
However I have an issue.
I've always converted hosts having small disks of around 35G over to domUs but have an issue were my current host in need of being virtualized has a physical disk of 400G but its / partition is only 35G, the rest of the drive is unallocated/unpartitioned and therefore unused.
[...]
I obviously don't want to migrate the entire 400G disk as it only has a 35G root partition (ext3, no LVMs in this case).
Oh dear, this is a problem :-(
The answer unfortunately is that virt-p2v currently doesn't support this - we can only migrate whole block devices.
As I understand Brian, the block device is whatever / is mounted on, a 25G partition, and it shouldn't matter how big the actual disk is containing the partition.
Unfortunately not - virt-p2v can only migrate whole disks.
Rich.
-
Brian Krusic -
David Lutterkort -
Richard W.M. Jones