virsh为kvm客户机添加vnc和cdrom设备及挂载iso文件

Posted on 2025-05-19 Edited on 2025-05-20 In GNU/Linux

如果安装配置客户机时没有添加vnc和cdrom设备，可以通过编辑xml配置文件和命令来添加支持

添加VNC

关闭客户机后virsh edit guest_name，在devices内添加:

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<graphics type='vnc' port='5900' autoport='no' listen='0.0.0.0'>
      <listen type='address' address='0.0.0.0'/>
</graphics>

重新启动客户机后，会在主机的5900监听vnc

查看客户机的vnc监听

1 2	$ sudo virsh domdisplay guest_name vnc://localhost:0

添加CDROM设备

关闭客户机后virsh edit guest_name，在devices内添加:

<disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/cdrom/cdrom.iso' index='1'/>
      <backingStore/>
      <target dev='sda' bus='sata'/>
      <readonly/>
      <alias name='sata0-0-0'/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>

查看客户机快设备列表

sudo virsh domblklist guest_name

 Target   Source
--------------------------------------------------------------
 vda      /var/lib/libvirt/images/guest_name/root-disk.qcow2
 sda      /var/lib/libvirt/images/guest_name/cloud-init.iso

可以在客户机运行时，动态更换cdrom设备的iso文件：

1	$ sudo virsh attach-disk guest_name /var/lib/libvirt/images/cdrom/foo.iso sda --type cdrom --mode readonly

使用完成后，可以弹出cdrom设备里的iso

1	$ sudo virsh change-media guest_name sda --eject

References:

[1]How to add a cdrom to a libvirt VM and boot from it