[one-users] Configure hosts to use qemu without kvm hardware acceleration

[Carlo Daffara]

It is nevertheless an interesting feature. For example, when emulating legacy OSes like DOS or Windows 3.11 you
have to disable KVM anyway, or the OS does not boot. (And yes, we *do* have sometimes to bring legacy operating systems
into OpenNebula :-))
Maybe we can add it as a feature? It should be mainly a matter of passing the "-no-kvm" switch....
cheers,
Carlo Daffara

----- Messaggio originale -----
Da: "Jon" <three18ti at gmail.com>
A: "Marco Fanti" <marco.fanti at studenti.polito.it>
Cc: "Users OpenNebula" <users at lists.opennebula.org>
Inviato: Martedì, 25 marzo 2014 10:20:50
Oggetto: Re: [one-users] Configure hosts to use qemu without kvm hardware	acceleration



Shouldn't qemu fallback to "paravitualization" when hardware acceleration isn't available? 

http://blog.vmsplice.net/2011/03/should-i-use-qemu-or-kvm.html?m=1 

I was confident that qemu could detect on the fly if hardware virtualization was available and would enable it or not as appropriate. until your post... 

Are you getting an error with OpenNebula? 

Thanks, 
Jon A 
On Mar 25, 2014 1:41 AM, "Marco Fanti" < marco.fanti at studenti.polito.it > wrote: 



Hi all, 
I'm building a testing environment and I need to use some kvm virtual machines as host nodes. 
Since I cannot enable the hardware acceleration inside a virtual machine*, I'd like to know how to configure a host node like the configuration that there is in the kvm sandbox (that actually use qemu-kvm with the parameter -no-kvm). 
As frontend node and host nodes I'm using Debian 7, and opennebula is installed from the .deb packages for Debian 7 downloaded from the opennebula website. 

Thank you all, 
Marco Fanti 

*I know it is possible to enable nested kvm inside kvm, the guide is http://palexster.wordpress.com/2013/03/06/enable-nested-virtualization-on-kvm/ , 
BUT this features has a lot of bug, especially in the "old" versions of kvm like the one in Debian Stable, so I'd like a more stable solution, like to use qemu without kvm as in the kvm sandbox 

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