libvirt 问题：CPU topology doesn't match maximum vcpu

XML 基础配置信息

<domain type="kvm">
<uuid>3121eb64-8f58-4f04-b094-6fefc3597d1d</uuid>
<name>instance-0000026d</name>
<memory>16777216</memory>
<vcpu>16</vcpu>
<metadata>
<nova:instance xmlns:nova="http://openstack.org/xmlns/libvirt/nova/1.0">;
<nova:package version="13.1.4-1.el7"/>
<nova:name>shut-win.vlan1217</nova:name>
<nova:creationTime>2018-01-08 10:45:24</nova:creationTime>
<nova:flavor name="windows-16-16G-100G">
<nova:memory>16384</nova:memory>
<nova:disk>120</nova:disk>
<nova:swap>0</nova:swap>
<nova:ephemeral>0</nova:ephemeral>
<nova:vcpus>16</nova:vcpus>
</nova:flavor>
<nova:owner>
<nova:user uuid="053d91950deb40d08b706988f4bf914a">sys-admin</nova:user>
<nova:project uuid="8b79300ff2a546d896ef58a9c8004e68">sys-admin</nova:project>
</nova:owner>
<nova:root type="image" uuid="86e30f80-5a93-47ee-88c9-de5c1db6df10"/>
</nova:instance>
</metadata>
<sysinfo type="smbios">
<system>
<entry name="manufacturer">Fedora Project</entry>
<entry name="product">OpenStack Nova</entry>
<entry name="version">13.1.4-1.el7</entry>
<entry name="serial">23b8b39c-2dad-4172-a8eb-4c260299ed6c</entry>
<entry name="uuid">3121eb64-8f58-4f04-b094-6fefc3597d1d</entry>
<entry name="family">Virtual Machine</entry>
</system>
</sysinfo>
<os>
<type>hvm</type>
<boot dev="hd"/>
<smbios mode="sysinfo"/>
</os>
<features>
<acpi/>
<apic/>
<hyperv>
<relaxed state="on"/>
<vapic state="on"/>
<spinlocks retries="8191" state="on"/>
</hyperv>
</features>
<cputune>
<shares>16384</shares>
</cputune>
<clock offset="localtime">
<timer name="pit" tickpolicy="delay"/>
<timer name="rtc" tickpolicy="catchup"/>
<timer name="hpet" present="no"/>
<timer name="hypervclock" present="yes"/>
</clock>
<cpu match="exact">
<topology sockets="16" cores="16" threads="1"/>
</cpu>
<devices>
<disk type="network" device="disk">
<driver type="raw" cache="none"/>
<source protocol="rbd" name="nova_instances/3121eb64-8f58-4f04-b094-6fefc3597d1d_disk">
<host name="10.168.4.4" port="6789"/>
<host name="10.168.4.6" port="6789"/>
<host name="10.168.4.8" port="6789"/>
</source>
<auth username="cinder">
<secret type="ceph" uuid="c8ff7874-ac9d-4897-ae01-b8a29f2c3488"/>
</auth>
<target bus="virtio" dev="vda"/>
<iotune>
<read_bytes_sec>52428800</read_bytes_sec>
<write_bytes_sec>52428800</write_bytes_sec>
</iotune>
</disk>
<disk type="network" device="cdrom">
<driver type="raw" cache="none"/>
<source protocol="rbd" name="nova_instances/3121eb64-8f58-4f04-b094-6fefc3597d1d_disk.config">
<host name="10.168.4.4" port="6789"/>
<host name="10.168.4.6" port="6789"/>
<host name="10.168.4.8" port="6789"/>
</source>
<auth username="cinder">
<secret type="ceph" uuid="c8ff7874-ac9d-4897-ae01-b8a29f2c3488"/>
</auth>
<target bus="ide" dev="hdd"/>
<iotune>
<read_bytes_sec>52428800</read_bytes_sec>
<write_bytes_sec>52428800</write_bytes_sec>
</iotune>
</disk>
<interface type="bridge">
<mac address="fa:16:3e:bf:cc:a9"/>
<model type="virtio"/>
<source bridge="vlan1217"/>
</interface>
<serial type="file">
<source path="/data/nova/instances/3121eb64-8f58-4f04-b094-6fefc3597d1d/console.log"/>
</serial>
<serial type="pty"/>
<input type="tablet" bus="usb"/>
<graphics type="vnc" autoport="yes" keymap="en-us" listen="0.0.0.0"/>
<video>
<model type="cirrus"/>
</video>
<memballoon model="virtio">
<stats period="10"/>
</memballoon>
</devices>
</domain>

virsh create libvirt.xml 报错
error: Failed to create domain from libvirt.xml
error: unsupported configuration: CPU topology doesn't match maximum vcpu count

libvirt qemu版本
[root@l23-4-40 3121eb64-8f58-4f04-b094-6fefc3597d1d]# virsh -V
Virsh command line tool of libvirt 3.2.0
See web site at http://libvirt.org/

Compiled with support for:
 Hypervisors: QEMU/KVM LXC ESX Test
 Networking: Remote Network Bridging Interface netcf Nwfilter VirtualPort
 Storage: Dir Disk Filesystem SCSI Multipath iSCSI LVM RBD Gluster
 Miscellaneous: Daemon Nodedev SELinux Secrets Debug DTrace Readline Modular

    [root@l23-4-40 3121eb64-8f58-4f04-b094-6fefc3597d1d]# qemu-img  -V
    qemu-img version 2.9.0(qemu-kvm-ev-2.9.0-16.el7_4.13.1)
    Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers

1. error: unsupported configuration: CPU topology doesn't match maximum vcpu count 问题解决
   需要在配置里去除 <topology sockets="16" cores="16" threads="1"/> 解决问题

Windows 内核问题
但是 Windows 系统内核识别异常，只能识别8核，16核无法显示，需要添加“<topology sockets="16" cores="16" threads="1"/>” 但是无法启动

![](http://i2.51cto.com/images/blog/201801/08/1378e5401edf275c682f68fce6d0dd35.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
![](http://i2.51cto.com/images/blog/201801/08/c5fffe42e40f870a31bca90055ce88ea.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)