[openstack-dev] [Openstack] Create VMs with Power architecture(ppc64) on OpenStack running on x86_64 nodes??

Sean Mooney smooney at redhat.com
Mon Nov 19 18:10:35 UTC 2018


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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