Re: [Openstack-operators] Live-migration CPU doesn't have compatibility

2016-10-31 Thread Chris Friesen
On 10/27/2016 11:09 PM, William Josefsson wrote: hi, I did 'virsh capabilities' on the Haswell, which turned out to list model: Haswell-noTSX. So I set in nova.conf cpu_model=Haswell-noTSX on both Haswell and Broadwell hosts and it seems to work. I believe this is my smallest common denominator.

Re: [Openstack-operators] Live-migration CPU doesn't have compatibility

2016-10-27 Thread William Josefsson
hi, I did 'virsh capabilities' on the Haswell, which turned out to list model: Haswell-noTSX. So I set in nova.conf cpu_model=Haswell-noTSX on both Haswell and Broadwell hosts and it seems to work. I believe this is my smallest common denominator. thx will On Fri, Oct 28, 2016 at 2:39 AM,

Re: [Openstack-operators] Live-migration CPU doesn't have compatibility

2016-10-27 Thread Mohammed Naser
Depending on your workload, it will. If they depend on any custom CPU extensions, they will miss out on them and performance will be decreased. My personal suggestion is to read the docs for it and use the "smallest common denominator" in terms of CPU usage. On Thu, Oct 27, 2016 at 11:31 AM,

Re: [Openstack-operators] Live-migration CPU doesn't have compatibility

2016-10-27 Thread William Josefsson
On Thu, Oct 27, 2016 at 5:20 PM, Chris Friesen wrote: > In your case you probably want to set both computes to have: > > [libvirt] > cpu_mode = custom > cpu_model = Haswell > Hi Chris, thanks! Yerps, I finally got it working. However, I set cpu_model=kvm64

Re: [Openstack-operators] Live-migration CPU doesn't have compatibility

2016-10-27 Thread Chris Friesen
On 10/26/2016 06:07 AM, William Josefsson wrote: Hi list, I'm facing issues on Liberty/CentOS7 doing live migrations between to hosts. The hosts are Haswell and Broadwell. However, there is not feature specific running on my VMs Haswell -> Broadwell works Broadwell -> Haswell fails with the

Re: [Openstack-operators] Live-migration CPU doesn't have compatibility

2016-10-26 Thread William Josefsson
Thank you Mohammed. So I just set cpu_mode=none in libvirt section on both source and destination hosts, restart nova-compute, restart VMs on source host, and finally do the live migration? pls let me know if this is wrong. thx will On Wed, Oct 26, 2016 at 11:45 PM, Mohammed Naser

Re: [Openstack-operators] Live-migration CPU doesn't have compatibility

2016-10-26 Thread Mohammed Naser
The VMs have to be restarted so that the libvirt config is updated with the new CPU model. Good luck! On Wed, Oct 26, 2016 at 8:07 AM, William Josefsson wrote: > Hi list, > > I'm facing issues on Liberty/CentOS7 doing live migrations between to > hosts. The hosts are