Unacceptable CPU info: CPU doesn't have compatibilityOpenStack生产环境不同型号CPU迁移校验解决

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Unacceptable CPU info: CPU doesn't have compatibility

OpenStack 虚机迁移 nova-compute报错：Unacceptable CPU info: CPU doesn't have compatibility
解决方法：
[root@compute02 ~]# vim /usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py +6050

函数：check_can_live_migrate_destination

屏蔽代码，避免CPU校验：

        # Compare CPU
& o( ^5 ?* I( C4 B% l        # if not instance.vcpu_model or not instance.vcpu_model.model:
        #     source_cpu_info = src_compute_info['cpu_info']
  U$ {* C0 s. R. g        #     self._compare_cpu(None, source_cpu_info, instance)
        # else:
7 {, G1 R8 d2 v! d$ W        #     self._compare_cpu(instance.vcpu_model, None, instance)
/ f( T4 M8 S/ Y[root@compute02 ~]# systemctl restart openstack-nova-compute.service

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故障现象：虚拟机在不同类型CPU的服务器间热迁移时报错：InvalidCPUInfo: Unacceptable CPU info: CPU doesn't have compatibility

$ n, F+ P# C" ]) C/ I5 |6 L' ~故障原因：nova默认使用CPU的一些特性，热迁移时对CPU对比要求较高
2 `6 q9 a8 Z  c) L3 [' I$ ~6 H0 B
$ s3 ]6 G& V3 \$ [+ ^解决办法：1、修改/etc/nova/nova.conf文件，cpu_mode=None；2、修改代码/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py，把driver.py文件中cpu对比的代码注释掉；3、已经创建的虚拟机，要硬重启，重新生成xml配置文件。

  ]: N" \6 |6 K7 a9 T2 B6 Q+ o7 d# Compare CPU
$ j' ]/ ?* f  m
#        if not instance.vcpu_model or not instance.vcpu_model.model:

4 B1 R/ @0 P) W8 T#            source_cpu_info = src_compute_info['cpu_info']
  ^' N% Y! t4 E$ C8 o/ F, h6 N$ I5 m
/ o, Q% Q9 u9 c0 G- X#            self._compare_cpu(None, source_cpu_info)

5 I4 r- N) R- M3 a+ t2 X7 u# o; E8 E#        else:
! t8 P3 c4 c9 @" q% t' c. o0 B# f* z8 k
#            self._compare_cpu(instance.vcpu_model, None)