* [User Question] KVM and VirtualBox in Xen Dom0 @ 2012-09-20 7:11 Lukas Laukamp 2012-09-20 7:36 ` Pasi Kärkkäinen 0 siblings, 1 reply; 8+ messages in thread From: Lukas Laukamp @ 2012-09-20 7:11 UTC (permalink / raw) To: xen-devel Hello all, I have a simple user question but it's very technical and related to the Xen core. Does KVM and VirtualBox work in a Xen Dom0 with Xen 4.2? So I would like to create a VM Host for deploying VM templates which are compatible to the most solutions and host systems and I think that Xen, KVM/QEmu and VirtualBox are the best choice for this. Would be great when this is possible or could be implemented. Hope that someone can give me an answer. Best Regards PS: Sorry für my bed english _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [User Question] KVM and VirtualBox in Xen Dom0 2012-09-20 7:11 [User Question] KVM and VirtualBox in Xen Dom0 Lukas Laukamp @ 2012-09-20 7:36 ` Pasi Kärkkäinen 2012-09-20 7:44 ` Lukas Laukamp 0 siblings, 1 reply; 8+ messages in thread From: Pasi Kärkkäinen @ 2012-09-20 7:36 UTC (permalink / raw) To: Lukas Laukamp; +Cc: xen-devel On Thu, Sep 20, 2012 at 09:11:44AM +0200, Lukas Laukamp wrote: > Hello all, > > I have a simple user question but it's very technical and related to > the Xen core. Does KVM and VirtualBox work in a Xen Dom0 with Xen > 4.2? So I would like to create a VM Host for deploying VM templates > which are compatible to the most solutions and host systems and I > think that Xen, KVM/QEmu and VirtualBox are the best choice for > this. > > Would be great when this is possible or could be implemented. Hope > that someone can give me an answer. > Nope, KVM or VirtualBox won't work in Xen dom0. But you can use Xen Nested Hardware Virtualization and run KVM/VirtualBox in Xen HVM guest. This is a "tech preview" currently. -- Pasi ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [User Question] KVM and VirtualBox in Xen Dom0 2012-09-20 7:36 ` Pasi Kärkkäinen @ 2012-09-20 7:44 ` Lukas Laukamp 2012-09-20 7:52 ` Pasi Kärkkäinen 2012-09-20 8:10 ` Fajar A. Nugraha 0 siblings, 2 replies; 8+ messages in thread From: Lukas Laukamp @ 2012-09-20 7:44 UTC (permalink / raw) To: Pasi Kärkkäinen; +Cc: xen-devel Am 2012-09-20 09:36, schrieb Pasi Kärkkäinen: > On Thu, Sep 20, 2012 at 09:11:44AM +0200, Lukas Laukamp wrote: >> Hello all, >> >> I have a simple user question but it's very technical and related to >> the Xen core. Does KVM and VirtualBox work in a Xen Dom0 with Xen >> 4.2? So I would like to create a VM Host for deploying VM templates >> which are compatible to the most solutions and host systems and I >> think that Xen, KVM/QEmu and VirtualBox are the best choice for >> this. >> >> Would be great when this is possible or could be implemented. Hope >> that someone can give me an answer. >> > > Nope, KVM or VirtualBox won't work in Xen dom0. > > But you can use Xen Nested Hardware Virtualization and run > KVM/VirtualBox in Xen HVM guest. > This is a "tech preview" currently. > > -- Pasi Hello, ok, this would be possible with Xen 4.2? And would it be possible to implement something that KVM and VirtualBox work in a Xen Dom0? Is this a task for the Xen development or something for the Linux kernel,, KVM or VirtualBox? Best Regards _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [User Question] KVM and VirtualBox in Xen Dom0 2012-09-20 7:44 ` Lukas Laukamp @ 2012-09-20 7:52 ` Pasi Kärkkäinen 2012-09-20 8:03 ` Lukas Laukamp 2012-09-20 8:10 ` Fajar A. Nugraha 1 sibling, 1 reply; 8+ messages in thread From: Pasi Kärkkäinen @ 2012-09-20 7:52 UTC (permalink / raw) To: Lukas Laukamp; +Cc: xen-devel On Thu, Sep 20, 2012 at 09:44:41AM +0200, Lukas Laukamp wrote: > Am 2012-09-20 09:36, schrieb Pasi Kärkkäinen: > >On Thu, Sep 20, 2012 at 09:11:44AM +0200, Lukas Laukamp wrote: > >>Hello all, > >> > >>I have a simple user question but it's very technical and related to > >>the Xen core. Does KVM and VirtualBox work in a Xen Dom0 with Xen > >>4.2? So I would like to create a VM Host for deploying VM templates > >>which are compatible to the most solutions and host systems and I > >>think that Xen, KVM/QEmu and VirtualBox are the best choice for > >>this. > >> > >>Would be great when this is possible or could be implemented. Hope > >>that someone can give me an answer. > >> > > > >Nope, KVM or VirtualBox won't work in Xen dom0. > > > >But you can use Xen Nested Hardware Virtualization and run > >KVM/VirtualBox in Xen HVM guest. > >This is a "tech preview" currently. > > > >-- Pasi > > Hello, > > ok, this would be possible with Xen 4.2? > In Xen 4.2.0 I think Nested Virt should work on AMD CPUs, but Intel CPUs require some additional patches that aren't yet in 4.2 branch. > And would it be possible to implement something that KVM and VirtualBox work in a Xen Dom0? > Why do you want to run them in dom0 ? > Is this a task for the Xen development or something for the Linux > kernel,, KVM or VirtualBox? > I think it *might* be possible when Xen PVH (Hybrid) is merged to Xen 4.3, which basically allows running Xen dom0 in HVM container. -- Pasi ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [User Question] KVM and VirtualBox in Xen Dom0 2012-09-20 7:52 ` Pasi Kärkkäinen @ 2012-09-20 8:03 ` Lukas Laukamp 2012-09-20 8:37 ` Pasi Kärkkäinen 0 siblings, 1 reply; 8+ messages in thread From: Lukas Laukamp @ 2012-09-20 8:03 UTC (permalink / raw) To: Pasi Kärkkäinen; +Cc: xen-devel Am 2012-09-20 09:52, schrieb Pasi Kärkkäinen: > On Thu, Sep 20, 2012 at 09:44:41AM +0200, Lukas Laukamp wrote: >> Am 2012-09-20 09:36, schrieb Pasi Kärkkäinen: >> >On Thu, Sep 20, 2012 at 09:11:44AM +0200, Lukas Laukamp wrote: >> >>Hello all, >> >> >> >>I have a simple user question but it's very technical and related >> to >> >>the Xen core. Does KVM and VirtualBox work in a Xen Dom0 with Xen >> >>4.2? So I would like to create a VM Host for deploying VM >> templates >> >>which are compatible to the most solutions and host systems and I >> >>think that Xen, KVM/QEmu and VirtualBox are the best choice for >> >>this. >> >> >> >>Would be great when this is possible or could be implemented. Hope >> >>that someone can give me an answer. >> >> >> > >> >Nope, KVM or VirtualBox won't work in Xen dom0. >> > >> >But you can use Xen Nested Hardware Virtualization and run >> >KVM/VirtualBox in Xen HVM guest. >> >This is a "tech preview" currently. >> > >> >-- Pasi >> >> Hello, >> >> ok, this would be possible with Xen 4.2? >> > > In Xen 4.2.0 I think Nested Virt should work on AMD CPUs, > but Intel CPUs require some additional patches that aren't yet in 4.2 > branch. > >> And would it be possible to implement something that KVM and >> VirtualBox work in a Xen Dom0? >> > > Why do you want to run them in dom0 ? > >> Is this a task for the Xen development or something for the Linux >> kernel,, KVM or VirtualBox? >> > > I think it *might* be possible when Xen PVH (Hybrid) is merged to Xen > 4.3, > which basically allows running Xen dom0 in HVM container. > > -- Pasi Hello, I googled for xen Hybrid, but have question if I understand it correct. Now the Dom0 is a PV Guest. With Xen Hybrid the Dom0 can run as a HVM with PV features on the hypervisor. This would make it possible because of nested virtualization that KVM and VirtualBox run inside dom0 right? And my second question would be: Is the aim of Xen hybrid to bring Dom0 support to more OSes? Best Regards _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [User Question] KVM and VirtualBox in Xen Dom0 2012-09-20 8:03 ` Lukas Laukamp @ 2012-09-20 8:37 ` Pasi Kärkkäinen 2012-09-20 13:52 ` Lukas Laukamp 0 siblings, 1 reply; 8+ messages in thread From: Pasi Kärkkäinen @ 2012-09-20 8:37 UTC (permalink / raw) To: Lukas Laukamp; +Cc: xen-devel On Thu, Sep 20, 2012 at 10:03:43AM +0200, Lukas Laukamp wrote: > > > >I think it *might* be possible when Xen PVH (Hybrid) is merged to > >Xen 4.3, > >which basically allows running Xen dom0 in HVM container. > > > >-- Pasi > > Hello, > > I googled for xen Hybrid, but have question if I understand it > correct. Now the Dom0 is a PV Guest. > Correct. > With Xen Hybrid the Dom0 can run as a HVM with PV features on the hypervisor. > PVH dom0 is basicly PV dom0 in HVM container. It's more PV than HVM. > This would make it possible because of nested virtualization that KVM and VirtualBox > run inside dom0 right? > Yes, but PVH doesn't enable nested virt automatically, that'll require some extra patches. > And my second question would be: Is the aim of Xen hybrid to bring > Dom0 support to more OSes? > The purpose of PVH dom0 is to be able to utilize HAP (Hardware Assisted Paging) in dom0, and also lowering syscall overhead for 64bit dom0. So it's about optimizations. See Mukesh's presentation about PVH/Hybrid from XenSummit North America 2012. -- Pasi ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [User Question] KVM and VirtualBox in Xen Dom0 2012-09-20 8:37 ` Pasi Kärkkäinen @ 2012-09-20 13:52 ` Lukas Laukamp 0 siblings, 0 replies; 8+ messages in thread From: Lukas Laukamp @ 2012-09-20 13:52 UTC (permalink / raw) To: Pasi Kärkkäinen; +Cc: xen-devel Am 2012-09-20 10:37, schrieb Pasi Kärkkäinen: > On Thu, Sep 20, 2012 at 10:03:43AM +0200, Lukas Laukamp wrote: >> > >> >I think it *might* be possible when Xen PVH (Hybrid) is merged to >> >Xen 4.3, >> >which basically allows running Xen dom0 in HVM container. >> > >> >-- Pasi >> >> Hello, >> >> I googled for xen Hybrid, but have question if I understand it >> correct. Now the Dom0 is a PV Guest. >> > > Correct. > >> With Xen Hybrid the Dom0 can run as a HVM with PV features on the >> hypervisor. >> > > PVH dom0 is basicly PV dom0 in HVM container. It's more PV than HVM. > >> This would make it possible because of nested virtualization that >> KVM and VirtualBox >> run inside dom0 right? >> > > Yes, but PVH doesn't enable nested virt automatically, that'll > require some extra patches. > >> And my second question would be: Is the aim of Xen hybrid to bring >> Dom0 support to more OSes? >> > > The purpose of PVH dom0 is to be able to utilize HAP (Hardware > Assisted Paging) > in dom0, and also lowering syscall overhead for 64bit dom0. > > So it's about optimizations. > See Mukesh's presentation about PVH/Hybrid from XenSummit North > America 2012. > > -- Pasi > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel Hello, thanks for our replies Fajar and Pasi. My questions are replied now. I thought it would be comfortable to have them all on one host, we will see whether it's possible in future with PVH. Best Regards _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [User Question] KVM and VirtualBox in Xen Dom0 2012-09-20 7:44 ` Lukas Laukamp 2012-09-20 7:52 ` Pasi Kärkkäinen @ 2012-09-20 8:10 ` Fajar A. Nugraha 1 sibling, 0 replies; 8+ messages in thread From: Fajar A. Nugraha @ 2012-09-20 8:10 UTC (permalink / raw) To: Lukas Laukamp; +Cc: xen-devel On Thu, Sep 20, 2012 at 2:44 PM, Lukas Laukamp <lukas@laukamp.me> wrote: > And would it be possible to > implement something that KVM and VirtualBox work in a Xen Dom0? > Is this a > task for the Xen development or something for the Linux kernel,, KVM or > VirtualBox? Since it looks like you're a user and not a developer, I'd actually suggest you rethink your requirements and find ways to implement it using available solutions. For example, you said you want to "create a VM Host for deploying VM templates which are compatible to the most solutions". If the templates are Linux, it's much easier to create one template that suits all. Some things to watch out for: - disk driver. Ubuntu loads most disk driver by default, but for other distros (e.g. Centos) you might need to force drivers (xen front block driver, virtio, etc) to be included in initrd by modifying /etc/modprobe.conf or similar regardles which driver is currently active - disk naming. Use LABEL or UUID whenever possible - filesystem for /boot. To be safe, use a separate /boot partition, and use ext2/ext3, since some versions of pygrub do not support ext4. If you follow that, you should be able to use the same image on virtualbox, vmware, xen PV (with vfb enabled) or HVM. If you need more help creating this template, xen-users will be a more appropriate place to ask. Another option, if your machine is dedicated for this purpose, is to run native linux with kvm and virtualbox installed (you can have them both installed, just not used at the same time), and install xen inside a VM. That way you can still test everything except xen HVM. -- Fajar ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2012-09-20 13:52 UTC | newest] Thread overview: 8+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2012-09-20 7:11 [User Question] KVM and VirtualBox in Xen Dom0 Lukas Laukamp 2012-09-20 7:36 ` Pasi Kärkkäinen 2012-09-20 7:44 ` Lukas Laukamp 2012-09-20 7:52 ` Pasi Kärkkäinen 2012-09-20 8:03 ` Lukas Laukamp 2012-09-20 8:37 ` Pasi Kärkkäinen 2012-09-20 13:52 ` Lukas Laukamp 2012-09-20 8:10 ` Fajar A. Nugraha
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