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

Mon Mar 31 04:08:08 PDT 2014

Probably you need to modify

/etc/one/vmm_exec/vmm_exec_kvm.conf

and add

EMULATOR = /usr/libexec/qemu-kvm

Cheers

Ruben


On Tue, Mar 25, 2014 at 1:51 PM, Marco Fanti <marco.fanti at studenti.polito.it
> wrote:

> Thank you for the answers,
> this was the log file of the vm that don't start because of the missing
> kvm module (so it does not fall back to qemu --no-kvm when the kvm module
> is not present on the system.
>
> Mon Mar 24 15:11:02 2014 [DiM][I]: New VM state is ACTIVE.
> Mon Mar 24 15:11:02 2014 [LCM][I]: New VM state is PROLOG.
> Mon Mar 24 15:11:02 2014 [VM][I]: Virtual Machine has no context
> Mon Mar 24 15:11:03 2014 [LCM][I]: New VM state is BOOT
> Mon Mar 24 15:11:03 2014 [VMM][I]: Generating deployment file:
> /var/lib/one/vms/2/deployment.0
> Mon Mar 24 15:11:03 2014 [VMM][I]: ExitCode: 0
> Mon Mar 24 15:11:03 2014 [VMM][I]: Successfully execute network driver
> operation: pre.
> Mon Mar 24 15:11:03 2014 [VMM][I]: Command execution fail: cat << EOT |
> /var/tmp/one/vmm/kvm/deploy '/var/lib/one//datastores/0/2/deployment.0'
> 'on-compute1' 2 on-compute1
> Mon Mar 24 15:11:03 2014 [VMM][I]: error: Failed to create domain from
> /var/lib/one//datastores/0/2/deployment.0
> Mon Mar 24 15:11:03 2014 [VMM][I]: error: internal error Child process
> (LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
> HOME=/ /usr/bin/kvm -no-user-config -device ? -device pci-assign,? -device
> virtio-blk-pci,? -device virtio-net-pci,? -device scsi-disk,?) unexpected
> exit status 1: Could not access KVM kernel module: No such file or directory
> Mon Mar 24 15:11:03 2014 [VMM][I]: failed to initialize KVM: No such file
> or directory
> Mon Mar 24 15:11:03 2014 [VMM][I]: No accelerator found!
> Mon Mar 24 15:11:03 2014 [VMM][I]:
> Mon Mar 24 15:11:03 2014 [VMM][E]: Could not create domain from
> /var/lib/one//datastores/0/2/deployment.0
> Mon Mar 24 15:11:03 2014 [VMM][I]: ExitCode: 255
>
>
>
> 2014-03-25 13:14 GMT+01:00 Javier Fontan <jfontan at opennebula.org>:
>
> OpenNebula can be configured to use qemu emulation instead of kvm
>> virtualization but not per VM but in the driver definition. The type
>> of the VM driver can be changed from "kvm" to "qemu" in oned.conf. For
>> example:
>>
>> --8<------
>> VM_MAD = [
>>     name       = "kvm",
>>     executable = "one_vmm_ssh",
>>     arguments  = "-t 15 -r 0 kvm",
>>     default    = "vmm_ssh/vmm_ssh_kvm.conf",
>>     type       = "qemu" ]
>> ------>8--
>>
>> This is used in the tryout images as they are already virtualized. It
>> will be also useful for the infrastructure Marco Fanti wants to
>> create.
>>
>> Still this is not useful to have mixed virtualized and emulated
>> machines in the same host. Maybe this parameter can be changed to a VM
>> setting instead of a driver setting.
>>
>
> Thank you Javier, this solution is actually documented in the oned.conf
> comments, I'm sorry that i didn't noticed it before.
>
>
>>
>> On Tue, Mar 25, 2014 at 10:28 AM, Carlo Daffara
>> <carlo.daffara at cloudweavers.eu> wrote:
>> > 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
>> >
>> > _______________________________________________
>> > Users mailing list
>> > Users at lists.opennebula.org
>> > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>> >
>> >
>> > _______________________________________________
>> > Users mailing list
>> > Users at lists.opennebula.org
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>> > _______________________________________________
>> > Users mailing list
>> > Users at lists.opennebula.org
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>>
>>
>>
>> --
>> Javier Fontán Muiños
>> Developer
>> OpenNebula - The Open Source Toolkit for Data Center Virtualization
>> www.OpenNebula.org | @OpenNebula | github.com/jfontan
>>
>
>
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>
>


-- 
-- 
Ruben S. Montero, PhD
Project co-Lead and Chief Architect
OpenNebula - Flexible Enterprise Cloud Made Simple
www.OpenNebula.org | rsmontero at opennebula.org | @OpenNebula
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