12.4. 가상 머신 마이그레이션을 위한 호스트 CPU 호환성 확인

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1. 소스 호스트에서 CPU 기능을 가져와서 domCaps-CPUs.xml 과 같은 새 XML 파일에 붙여넣습니다.

   # virsh domcapabilities | xmllint --xpath "//cpu/mode[@name='host-model']" - > domCaps-CPUs.xml

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2. XML 파일에서 <mode> < /mode > 태그를 < cpu> </cpu >로 바꿉니다.

3. 선택 사항: domCaps-CPUs.xml 파일의 콘텐츠가 다음과 유사한지 확인합니다.

   # cat domCaps-CPUs.xml
   
       <cpu>
             <model fallback="forbid">Skylake-Client-IBRS</model>
             <vendor>Intel</vendor>
             <feature policy="require" name="ss"/>
             <feature policy="require" name="vmx"/>
             <feature policy="require" name="pdcm"/>
             <feature policy="require" name="hypervisor"/>
             <feature policy="require" name="tsc_adjust"/>
             <feature policy="require" name="clflushopt"/>
             <feature policy="require" name="umip"/>
             <feature policy="require" name="md-clear"/>
             <feature policy="require" name="stibp"/>
             <feature policy="require" name="arch-capabilities"/>
             <feature policy="require" name="ssbd"/>
             <feature policy="require" name="xsaves"/>
             <feature policy="require" name="pdpe1gb"/>
             <feature policy="require" name="invtsc"/>
             <feature policy="require" name="ibpb"/>
             <feature policy="require" name="ibrs"/>
             <feature policy="require" name="amd-stibp"/>
             <feature policy="require" name="amd-ssbd"/>
             <feature policy="require" name="rsba"/>
             <feature policy="require" name="skip-l1dfl-vmentry"/>
             <feature policy="require" name="pschange-mc-no"/>
             <feature policy="disable" name="hle"/>
             <feature policy="disable" name="rtm"/>
       </cpu>

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4. 대상 호스트에서 다음 명령을 사용하여 CPU 기능을 가져옵니다.

   # virsh domcapabilities | xmllint --xpath "//cpu/mode[@name='host-model']" -
   
       <mode name="host-model" supported="yes">
               <model fallback="forbid">IvyBridge-IBRS</model>
               <vendor>Intel</vendor>
               <feature policy="require" name="ss"/>
               <feature policy="require" name="vmx"/>
               <feature policy="require" name="pdcm"/>
               <feature policy="require" name="pcid"/>
               <feature policy="require" name="hypervisor"/>
               <feature policy="require" name="arat"/>
               <feature policy="require" name="tsc_adjust"/>
               <feature policy="require" name="umip"/>
               <feature policy="require" name="md-clear"/>
               <feature policy="require" name="stibp"/>
               <feature policy="require" name="arch-capabilities"/>
               <feature policy="require" name="ssbd"/>
               <feature policy="require" name="xsaveopt"/>
               <feature policy="require" name="pdpe1gb"/>
               <feature policy="require" name="invtsc"/>
               <feature policy="require" name="ibpb"/>
               <feature policy="require" name="amd-ssbd"/>
               <feature policy="require" name="skip-l1dfl-vmentry"/>
               <feature policy="require" name="pschange-mc-no"/>
       </mode>

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5. 대상 호스트에서 가져온 CPU 기능을 소스 호스트의 domCaps-CPUs.xml 파일에 추가합니다. 다시 < mode> </mode > 태그를 < cpu> </cpu >로 바꾸고 파일을 저장합니다.

6. 선택 사항: XML 파일에 이제 두 호스트의 CPU 기능이 포함되어 있는지 확인합니다.

   # cat domCaps-CPUs.xml
   
       <cpu>
             <model fallback="forbid">Skylake-Client-IBRS</model>
             <vendor>Intel</vendor>
             <feature policy="require" name="ss"/>
             <feature policy="require" name="vmx"/>
             <feature policy="require" name="pdcm"/>
             <feature policy="require" name="hypervisor"/>
             <feature policy="require" name="tsc_adjust"/>
             <feature policy="require" name="clflushopt"/>
             <feature policy="require" name="umip"/>
             <feature policy="require" name="md-clear"/>
             <feature policy="require" name="stibp"/>
             <feature policy="require" name="arch-capabilities"/>
             <feature policy="require" name="ssbd"/>
             <feature policy="require" name="xsaves"/>
             <feature policy="require" name="pdpe1gb"/>
             <feature policy="require" name="invtsc"/>
             <feature policy="require" name="ibpb"/>
             <feature policy="require" name="ibrs"/>
             <feature policy="require" name="amd-stibp"/>
             <feature policy="require" name="amd-ssbd"/>
             <feature policy="require" name="rsba"/>
             <feature policy="require" name="skip-l1dfl-vmentry"/>
             <feature policy="require" name="pschange-mc-no"/>
             <feature policy="disable" name="hle"/>
             <feature policy="disable" name="rtm"/>
       </cpu>
       <cpu>
             <model fallback="forbid">IvyBridge-IBRS</model>
             <vendor>Intel</vendor>
             <feature policy="require" name="ss"/>
             <feature policy="require" name="vmx"/>
             <feature policy="require" name="pdcm"/>
             <feature policy="require" name="pcid"/>
             <feature policy="require" name="hypervisor"/>
             <feature policy="require" name="arat"/>
             <feature policy="require" name="tsc_adjust"/>
             <feature policy="require" name="umip"/>
             <feature policy="require" name="md-clear"/>
             <feature policy="require" name="stibp"/>
             <feature policy="require" name="arch-capabilities"/>
             <feature policy="require" name="ssbd"/>
             <feature policy="require" name="xsaveopt"/>
             <feature policy="require" name="pdpe1gb"/>
             <feature policy="require" name="invtsc"/>
             <feature policy="require" name="ibpb"/>
             <feature policy="require" name="amd-ssbd"/>
             <feature policy="require" name="skip-l1dfl-vmentry"/>
             <feature policy="require" name="pschange-mc-no"/>
       </cpu>

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7. XML 파일을 사용하여 마이그레이션하려는 VM의 CPU 기능 기준선을 계산합니다.

   # virsh hypervisor-cpu-baseline domCaps-CPUs.xml
   
       <cpu mode='custom' match='exact'>
         <model fallback='forbid'>IvyBridge-IBRS</model>
         <vendor>Intel</vendor>
         <feature policy='require' name='ss'/>
         <feature policy='require' name='vmx'/>
         <feature policy='require' name='pdcm'/>
         <feature policy='require' name='pcid'/>
         <feature policy='require' name='hypervisor'/>
         <feature policy='require' name='arat'/>
         <feature policy='require' name='tsc_adjust'/>
         <feature policy='require' name='umip'/>
         <feature policy='require' name='md-clear'/>
         <feature policy='require' name='stibp'/>
         <feature policy='require' name='arch-capabilities'/>
         <feature policy='require' name='ssbd'/>
         <feature policy='require' name='xsaveopt'/>
         <feature policy='require' name='pdpe1gb'/>
         <feature policy='require' name='invtsc'/>
         <feature policy='require' name='ibpb'/>
         <feature policy='require' name='amd-ssbd'/>
         <feature policy='require' name='skip-l1dfl-vmentry'/>
         <feature policy='require' name='pschange-mc-no'/>
       </cpu>

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8. 마이그레이션하려는 VM의 XML 구성을 열고 < cpu > 섹션의 내용을 이전 단계에서 가져온 설정으로 교체합니다.

   # virsh edit VM-name

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9. VM이 실행 중인 경우 다시 시작합니다.

   # virsh reboot VM-name

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