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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.