13. libvirtError: unable to find any master

安装虚拟机提示：

libvirtError: operation failed: unable to find any master var store for loader: /usr/share/AAVMF/AAVMF_CODE.fd

解决办法：

把libvirt配置改成/usr/share/AAVMF/AAVMF_CODE.fd:/usr/share/AAVMF/AAVMF_VARS.fd 这个就好了

参考一个虚拟机的xml

<domain type='kvm'>
  <name>CentOS7.6</name>
  <uuid>52f824a5-f3bf-4322-a81c-cd9557d0decb</uuid>
  <memory unit='KiB'>8388608</memory>
  <currentMemory unit='KiB'>8388608</currentMemory>
  <vcpu placement='static'>4</vcpu>
  <os>
    <type arch='aarch64' machine='virt-rhel7.6.0'>hvm</type>
    <loader readonly='yes' type='pflash'>/usr/share/AAVMF/AAVMF_CODE.fd</loader>
    <nvram>/home/user1/.config/libvirt/qemu/nvram/CentOS7.6_VARS.fd</nvram>
    <boot dev='hd'/>
  </os>

参考一个qemu.conf [1] 的配置

nvram = ["/usr/share/AAVMF/AAVMF_CODE.fd:/usr/share/AAVMF/AAVMF_VARS.fd"]

[1]	https://github.com/libvirt/libvirt/blob/8e681cdab9a0c93208bbd7f1c8e82998356f4019/src/qemu/qemu.conf