Re: [RFC] Unify KVM kernel-space and user-space code into a single project

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Am 22.03.2010 23:06, schrieb Anthony Liguori:
> On 03/22/2010 02:47 PM, Avi Kivity wrote:
>> Having qemu enumerate guests one way or another is not a good idea IMO 
>> since it is focused on one guest and doesn't have a system-wide entity.
> 
> There always needs to be a system wide entity.  There are two ways to 
> enumerate instances from that system wide entity.  You can centralize 
> the creation of instances and there by maintain an list of current 
> instances.  You can also allow instances to be created in a 
> decentralized manner and provide a standard mechanism for instances to 
> register themselves with the system wide entity.
> 
> IOW, it's the difference between asking libvirtd to exec(qemu) vs 
> allowing a user to exec(qemu) and having qemu connect to a well known 
> unix domain socket for libvirt to tell libvirtd that it exists.

I think the latter is exactly what I would want for myself. I do see the
advantages of having a central instance, but I really don't want to
bother with libvirt configuration files or even GUIs just to get an
ad-hoc VM up when I can simply run "qemu -hda hd.img -m 1024". Let alone
that I usually want to have full control over qemu, including monitor
access and small details available as command line options.

I know that I'm not the average user with these requirements, but still
I am one user and do have these requirements. If I could just install
libvirt, continue using qemu as I always did and libvirt picked my VMs
up for things like global enumeration, that would be more or less the
optimal thing for me.

Kevin
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