Re: [openstack-dev] [Openstack] Create VMs with Power architecture(ppc64) on OpenStack running on x86_64 nodes??
adding openstack dev. On Mon, 2018-11-19 at 18:08 +0000, Sean Mooney wrote:
On Mon, 2018-11-19 at 11:57 -0500, Ken D'Ambrosio wrote:
On 2018-11-19 11:25, Yedhu Sastri wrote:
Hello All,
I have some use-cases which I want to test in PowerPC architecture(ppc64). As I dont have any Power machines I would like to try it with ppc64 VM's. Is it possible to run these kind of VM's on my OpenStack cluster(Queens) which runs on X86_64 architecture nodes(OS RHEL 7)??
I'm not 100% sure, but I'm 95% sure that the answer to your question is "No." While there's much emulation that occurs, the CPU isn't so much emulated, but more abstracted. Constructing and running a modern CPU in software would be non-trivial.
you can do this but not with kvm. you need to revert the virt dirver in the nova.conf back to qemu to disable kvm to allow emulation of other plathforms. that said i have only emulated power on x86_64 using libvirt or qemu idrectly never with openstack but i belive we used to support this i just hav enot done it personally.
-Ken
I set the image property architecture=ppc64 to the ppc64 image I uploaded to glance but no success in launching VM with those images. I am using KVM as hypervisor(qemu 2.10.0) in my compute nodes and I think it is not built to support power architecture. For testing without OpenStack I manually built qemu on a x86_64 host with ppc64 support(qemu-ppc64) and then I am able to host the ppc64 VM. But I dont know how to do this on my OpenStack cluster. Whether I need to manually build qemu on compute nodes with ppc64 support or I need to add some lines in my nova.conf to do this?? Any help to solve this issue would be much appreciated.
-- Thank you for your time and have a nice day,
With kind regards, Yedhu Sastri
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(not sure if my answer has been sent, sorry if duplicate) I don't touch ppc for a while but AFAIK this should work as long as you run full emulation (qemu, not kvm) as libvirt_type in nova.conf and get the qemu-system-ppc64le installed in the compute node. Assume also you get the ppc64le image to launch your instance. Expect poor performance though. On Mon, Nov 19, 2018 at 4:12 PM Sean Mooney <smooney@redhat.com> wrote:
adding openstack dev. On Mon, 2018-11-19 at 18:08 +0000, Sean Mooney wrote:
On Mon, 2018-11-19 at 11:57 -0500, Ken D'Ambrosio wrote:
On 2018-11-19 11:25, Yedhu Sastri wrote:
Hello All,
I have some use-cases which I want to test in PowerPC architecture(ppc64). As I dont have any Power machines I would like to try it with ppc64 VM's. Is it possible to run these kind of VM's on my OpenStack cluster(Queens) which runs on X86_64 architecture nodes(OS RHEL 7)??
I'm not 100% sure, but I'm 95% sure that the answer to your question is "No." While there's much emulation that occurs, the CPU isn't so much emulated, but more abstracted. Constructing and running a modern CPU in software would be non-trivial.
you can do this but not with kvm. you need to revert the virt dirver in the nova.conf back to qemu to disable kvm to allow emulation of other plathforms. that said i have only emulated power on x86_64 using libvirt or qemu idrectly never with openstack but i belive we used to support this i just hav enot done it personally.
-Ken
I set the image property architecture=ppc64 to the ppc64 image I
uploaded to glance but no success in launching VM
with those images. I am using KVM as hypervisor(qemu 2.10.0) in my compute nodes and I think it is not built to support power architecture. For testing without OpenStack I manually built qemu on a x86_64 host with ppc64 support(qemu-ppc64) and then I am able to host the ppc64 VM. But I dont know how to do this on my OpenStack cluster. Whether I need to manually build qemu on compute nodes with ppc64 support or I need to add some lines in my nova.conf to do this?? Any help to solve this issue would be much appreciated.
-- Thank you for your time and have a nice day,
With kind regards, Yedhu Sastri
_______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
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(not sure if my answer has been sent, sorry if duplicate) I don't touch ppc for a while but AFAIK this should work as long as you run full emulation (qemu, not kvm) as libvirt_type in nova.conf and get the qemu-system-ppc64le installed in the compute node. Assume also you get the ppc64le image to launch your instance. Expect poor performance though.
On Mon, 2018-11-19 at 17:25 -0200, Rafael Folco wrote: that is my understanding also. the perfromace is accepable but not great if you can enabled the multithread tcg backend instead of the default singel tread tcg backend that is used when in qemu only mode but it still wont match kvm accleration or power on power performance. i dont think we have a way to enabel the multi thread accleration for qemu only backend via nova unfortunetly it would be triavial to add but no one has asked as far as i am aware.
On Mon, Nov 19, 2018 at 4:12 PM Sean Mooney <smooney@redhat.com> wrote:
adding openstack dev. On Mon, 2018-11-19 at 18:08 +0000, Sean Mooney wrote:
On Mon, 2018-11-19 at 11:57 -0500, Ken D'Ambrosio wrote:
On 2018-11-19 11:25, Yedhu Sastri wrote:
Hello All,
I have some use-cases which I want to test in PowerPC architecture(ppc64). As I dont have any Power machines I would like to try it with ppc64 VM's. Is it possible to run these kind of VM's on my OpenStack cluster(Queens) which runs on X86_64 architecture nodes(OS RHEL 7)??
I'm not 100% sure, but I'm 95% sure that the answer to your question is "No." While there's much emulation that occurs, the CPU isn't so much emulated, but more abstracted. Constructing and running a modern CPU in software would be non-trivial.
you can do this but not with kvm. you need to revert the virt dirver in the nova.conf back to qemu to disable kvm to allow emulation of other plathforms. that said i have only emulated power on x86_64 using libvirt or qemu idrectly never with openstack but i belive we used to support this i just hav enot done it personally.
-Ken
I set the image property architecture=ppc64 to the ppc64 image I uploaded to glance but no success in
launching VM
with those images. I am using KVM as hypervisor(qemu 2.10.0) in my compute nodes and I think it is not built to support power architecture. For testing without OpenStack I manually built qemu on a x86_64 host with ppc64 support(qemu-ppc64) and then I am able to host the ppc64 VM. But I dont know how to do this on my OpenStack cluster. Whether I need to manually build qemu on compute nodes with ppc64 support or I need to add some lines in my nova.conf to do this?? Any help to solve this issue would be much appreciated.
-- Thank you for your time and have a nice day,
With kind regards, Yedhu Sastri
_______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
_______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
__________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: OpenStack-dev-request@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
__________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: OpenStack-dev-request@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
__________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: OpenStack-dev-request@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
participants (2)
-
Rafael Folco
-
Sean Mooney