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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 <mnaser at vexxhost.com> wrote:
> 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
> <william.josefson at gmail.com> 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 error below.
>>
>>
>> I have on both hosts configured
>> [libvirt]
>> cpu_mode=none
>>
>> and restarted openstack-nova-compute on hosts, however that didn't
>> help, with the same error. there gotta be a way of ignoring this
>> check? pls advice. thx will
>>
>>
>>
>> 2016-10-26 19:36:29.025 1438627 INFO nova.virt.libvirt.driver
>> [req-XXXX] Instance launched has CPU info: {"vendor": "Intel",
>> "model": "Broadwell", "arch": "x86_64", "features": ["smap", "avx",
>> "clflush", "sep", "rtm", "vme", "dtes64", "invpcid", "tsc",
>> "fsgsbase", "xsave", "pge", "vmx", "erms", "xtpr", "cmov", "hle",
>> "smep", "ssse3", "est", "pat", "monitor", "smx", "pbe", "lm", "msr",
>> "adx", "3dnowprefetch", "nx", "fxsr", "syscall", "tm", "sse4.1",
>> "pae", "sse4.2", "pclmuldq", "acpi", "fma", "tsc-deadline", "mmx",
>> "osxsave", "cx8", "mce", "de", "tm2", "ht", "dca", "lahf_lm", "abm",
>> "rdseed", "popcnt", "mca", "pdpe1gb", "apic", "sse", "f16c", "pse",
>> "ds", "invtsc", "pni", "rdtscp", "avx2", "aes", "sse2", "ss",
>> "ds_cpl", "bmi1", "bmi2", "pcid", "fpu", "cx16", "pse36", "mtrr",
>> "movbe", "pdcm", "rdrand", "x2apic"], "topology": {"cores": 10,
>> "cells": 2, "threads": 2, "sockets": 1}}
>> 2016-10-26 19:36:29.028 1438627 ERROR nova.virt.libvirt.driver
>> [req-XXXX] CPU doesn't have compatibility.
>>
>> 0
>>
>> Refer to http://libvirt.org/html/libvirt-libvirt-host.html#virCPUCompareResult
>> 2016-10-26 19:36:29.057 1438627 ERROR oslo_messaging.rpc.dispatcher
>> [req-XXXX] Exception during message handling: Unacceptable CPU info:
>> CPU doesn't have compatibility.
>>
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>
>
>
> --
> Mohammed Naser — vexxhost
> -----------------------------------------------------
> D. 514-316-8872
> D. 800-910-1726 ext. 200
> E. mnaser at vexxhost.com
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