ERROR internal error: process exited while connecting to monitor

centos7.4 創建kvm虛擬機時報錯

問題：

[root@oldboy ~]# virt-install --virt-type kvm --os-type=linux --os-variant rhel7 --name centos7 --memory 1024 --vcpus 1 --disk /opt/centos2.raw,format=raw,size=10 --cdrom /root/CentOS-7-x86_64-DVD-1804.iso --network network=default --graphics vnc,listen=0.0.0.0 --noautoconsole

Starting install...
Allocating 'centos2.raw'                                                  |  10 GB  00:00:00     
ERROR    internal error: process exited while connecting to monitor: 2019-04-26T02:40:30.310751Z qemu-kvm: -drive file=/root/CentOS-7-x86_64-DVD-1804.iso,format=raw,if=none,id=drive-ide0-0-0,readonly=on: could not open disk image /root/CentOS-7-x86_64-DVD-1804.iso: Could not open '/root/CentOS-7-x86_64-DVD-1804.iso': Permission denied
Removing disk 'centos2.raw'                                               |    0 B  00:00:00     
Domain installation does not appear to have been successful.
If it was, you can restart your domain by running:
  virsh --connect qemu:///system start centos7
otherwise, please restart your installation.

原因：

創建過程中qemu用戶會讀取/root/目錄下的CentOS-7-x86_64-DVD-1804.iso鏡像，但是qemu用戶沒有讀取/root目錄的權限，所以報錯

解決方法：

將鏡像移動到opt目錄下，修改創建的命令，進行創建，檢查端口，成功
[root@openstack ~]# mv CentOS-7-x86_64-DVD-1804.iso /opt/
[root@openstack ~]# virt-install --virt-type kvm --os-type=linux --os-variant rhel7 --name centos7 --memory 1024 --vcpus 1 --disk /opt/centos2.raw,format=raw,size=10 --cdrom /opt/CentOS-7-x86_64-DVD-1804.iso --network network=default --graphics vnc,listen=0.0.0.0 --noautoconsole
[root@openstack ~]# netstat -lntup|grep 5900
tcp        0      0 0.0.0.0:5900            0.0.0.0:*               LISTEN      2586/qemu-kvm