[libvirt-users] I can't virt-clone into an existing LVM now (ERROR: clone onto existing storage volume is not supported:) - i could in previous lbvirt versions? (deployment scripts no longer work...)
6:36 p.m.
Hi
To deploy KVM vms I use a KVM template + script - which is cloned, then
cloned again and resized - using virt-resize.
i.e
----------------------------------------------------
virt-clone --original debian6template-DONTSTART --name NAME.test -f
/dev/vgpool/NAME.test
virsh vol-create-as vgpool NAME 8G
virt-clone --original NAME.test --name NAME -f /dev/vgpool/NAME
virt-resize --expand /dev/sda1 /dev/vgpool/NAME.test /dev/vgpool/NAME
----------------------------------------------------
The reason I clone twice is because I know that virt-clone does things to
prep it for a new install, also the whole point was to be able to specify a
size to be clone into (hence the use of virt-resize)
This worked fine on our Ubuntu 11.10 server, however in Ubuntu 12.04 when I
try to do the same I get the error
'ERROR Clone onto existing storage volume is not supported:
'/dev/vgpool/test'
If I can't virt-clone into an existing LVM I know I can clone once - then
resize with LVM, then virt-resize into the partition (then virt-sysprep) -
however the issue with that is that it is far more fiddly to mange...
Previously could just make a 20GB partition and use virt-resize to expand
into - using the above method I would have to increase the LVM to the value
I want minus the size of the template..
i.e I have to specify - the amount to increase by, rather than the final
size I want.... The templates also change size (when I update them, etc)
which would mean re-writting the script after every update.
Is there a way I can re-enable being able to virt-clone to an existing LVM
partition ? As mentioned it works 100% fine in Ubuntu 10.04
Regards
10:38 p.m.
[adding virt-tools-list]
On 07/11/2012 04:36 AM, Morgan Cox wrote:
Hi
To deploy KVM vms I use a KVM template + script - which is cloned, then
cloned again and resized - using virt-resize.
i.e
----------------------------------------------------
virt-clone --original debian6template-DONTSTART --name NAME.test -f
/dev/vgpool/NAME.test
virsh vol-create-as vgpool NAME 8G
virt-clone --original NAME.test --name NAME -f /dev/vgpool/NAME
virt-resize --expand /dev/sda1 /dev/vgpool/NAME.test /dev/vgpool/NAME
----------------------------------------------------
The reason I clone twice is because I know that virt-clone does things to
prep it for a new install, also the whole point was to be able to specify a
size to be clone into (hence the use of virt-resize)
This worked fine on our Ubuntu 11.10 server, however in Ubuntu 12.04 when I
try to do the same I get the error
'ERROR Clone onto existing storage volume is not supported:
'/dev/vgpool/test'
virt-clone is a separate package from libvirt, I'm hoping that someone
on the virt-tools-list has more insight into whether this was an
accidental regression.
If I can't virt-clone into an existing LVM I know I can clone once - then
resize with LVM, then virt-resize into the partition (then virt-sysprep) -
however the issue with that is that it is far more fiddly to mange...
Previously could just make a 20GB partition and use virt-resize to expand
into - using the above method I would have to increase the LVM to the value
I want minus the size of the template..
i.e I have to specify - the amount to increase by, rather than the final
size I want.... The templates also change size (when I update them, etc)
which would mean re-writting the script after every update.
Is there a way I can re-enable being able to virt-clone to an existing LVM
partition ? As mentioned it works 100% fine in Ubuntu 10.04
--
Eric Blake eblake(a)redhat.com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
6:02 a.m.
New subject: [libvirt-users] [virt-tools-list] I can't virt-clone into an existing LVM now (ERROR: clone onto existing storage volume is not supported:) - i could in previous lbvirt versions? (deployment scripts no longer work...)
On Wed, Jul 11, 2012 at 08:38:31AM -0600, Eric Blake wrote:
On 07/11/2012 04:36 AM, Morgan Cox wrote:
> 'ERROR Clone onto existing storage volume is not supported:
> '/dev/vgpool/test'
virt-clone is a separate package from libvirt, I'm hoping that someone
on the virt-tools-list has more insight into whether this was an
accidental regression.
I think an important thing to point out is that virt-clone is just a
fancy way of copying (ie. dd) the data, plus it makes a handful of
changes to the libvirt config. You can do most of this by alternate
means.
> Previously could just make a 20GB partition and use virt-resize
to
> expand into - using the above method I would have to increase the
> LVM to the value I want minus the size of the template.. i.e I
> have to specify - the amount to increase by, rather than the final
> size I want.... The templates also change size (when I update
> them, etc) which would mean re-writting the script after every
> update.
So I'm not really clear why you don't just use virt-resize as before.
There's not much point in doing virt-clone + virt-resize, since
virt-resize itself does a copy.
Maybe you should explain exactly what overall goal you're trying to
achieve, instead of how you're currently trying to do it.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
New in Fedora 11: Fedora Windows cross-compiler. Compile Windows
programs, test, and build Windows installers. Over 70 libraries supprt'd
http://fedoraproject.org/wiki/MinGW http://www.annexia.org/fedora_mingw
6:22 p.m.
New subject: [libvirt-users] [virt-tools-list] I can't virt-clone into an existing LVM now (ERROR: clone onto existing storage volume is not supported:) - i could in previous lbvirt versions? (deployment scripts no longer work...)
Hi
I was under the impression that virt-clone would create new UUId,s etc
where as virt-resize doesn't ?
All I am trying to do is use a VM (in LVM) as a template to use to clone .
The templates are only about 3GB - so to deploy the template I need to
resize them.
This is why i did this
TEMPLATE -> [virt-clone] -> new_vm.tmp (to create new UUIDs , etc)
new_vm.tmp -> [virt-clone] -> new_vm (a clone of the vm with new uuids
- this creates .xml for qemu, etc, correct name . etc)
new_vm.tmp -> [virt-resize] -> new_vm - new vm has correct partition size.
If there is a more sensible way of doing this I would like to know !
Anyway is there a way of forcing being able to copy to an existing LVM
partition ?? As mentioned I could do it fine in Ubuntu 10.04 not
12.04 - i.e do I need to recompile libvirt, etc ?
Any help will be welcomed
6:35 p.m.
New subject: [libvirt-users] [virt-tools-list] I can't virt-clone into an existing LVM now (ERROR: clone onto existing storage volume is not supported:) - i could in previous lbvirt versions? (deployment scripts no longer work...)
On Wed, Jul 18, 2012 at 11:22:00AM +0100, Morgan Cox wrote:
Hi
I was under the impression that virt-clone would create new UUId,s etc
where as virt-resize doesn't ?
In my previous message I said:
"[...] plus it [virt-clone] makes a handful of changes to the
libvirt config. You can do most of this by alternate means."
All I am trying to do is use a VM (in LVM) as a template to use to
clone .
The templates are only about 3GB - so to deploy the template I need to
resize them.
This is why i did this
TEMPLATE -> [virt-clone] -> new_vm.tmp (to create new UUIDs , etc)
If virt-clone doesn't work then you should just copy and resize the
disk image using one step of virt-resize, create a new libvirt XML
configuration, and finally 'virsh define' the new guest. This would
involve just a single copy and is about the most efficient way of
doing it (even using qcow2 or LUN clones / FlexClone is unlikely to be
better).
If there is a more sensible way of doing this I would like to know !
See above.
Anyway is there a way of forcing being able to copy to an existing
LVM
partition ?? As mentioned I could do it fine in Ubuntu 10.04 not
12.04 - i.e do I need to recompile libvirt, etc ?
$ virt-resize /dev/vg/lv_template /dev/vg/lv_new
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines. Boot with a
live CD or over the network (PXE) and turn machines into Xen guests.
http://et.redhat.com/~rjones/virt-p2v
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4 comments
3 participants
participants (3)
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Eric Blake -
Morgan Cox -
Richard W.M. Jones