Re: [libvirt] domain type "kvm" error
On Sun, Sep 07, 2008 at 09:10:54PM +0300, Rakotomandimby Mihamina wrote:
Hi all,
I use "ubuntu hardy" but I dont think the problem is specific to the
distribution I use.
I installed KVM and libvirt as described here:
https://help.ubuntu.com/community/KVM
Following that method, created a domain, which dumps like this:
<domain type='qemu' id='1'>
<name>xp1</name>
...
</domain>
Launching the guest is OK, but it is as slow as if I directly launched
This is becuse of the type='qemu' attribute
$ qemu [options]
I tried to launch:
$ kvm [options]
and it is much faster
My conclusion is that method on the Ubuntu documentation launches a qemu
without the use of kvm.
That is correct.
I modified that XML dump, changing "qemu" with "kvm":
<domain type='kvm' id='1'>
<name>xp1</name>
...
</domain>
You also need to set the 'emulator' path to point to the KVM binary
if its not already specified.
I undefined the domain "xp1" and re-defined it with that
new XML file.
When I start the new defined domain:
virsh # start xp1
libvir: QEMU error : QEMU quit during console startup
qemu: unknowm parameter 'boot' in \
'file=/home/mihamina/xpjohnny.iso,if=ide,media=cdrom,boot=on'
error: Failed to start domain xp1
IIRC the Ubuntu libvirt is hardcoded to use -drive param for disks if the
type is 'kvm'. Latest libvirt will probe to see if this is supported or
not before using it.
It's a Windows XP domain.
My conclusion is:
- When domain type is "qemu", qemu is called a certain way, without
syntax error
- When domain type is "kvm", qemu/kvm is not called the same way and
among that, there are syntax errors.
Yes & no. Latest libvirt probes for whether -drive is supported, and
whether the boot= param is supported. The older version in Ubuntu doesn't
do this probe, and just toggles off type=qemu vs type=kvm
Daniel
--
|: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :|
|: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :|
|: http://autobuild.org -o- http://search.cpan.org/~danberr/ :|
|: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|