我正在努力将主机正确检测到的USB设备连接到kvm vm.
我有一个新安装的Ubuntu Server 14.10作为KVM / QEMU主机.我使用这个命令设置了一个Ubuntu vm：
virt-install --connect qemu:///system \
-n test01 \
-r 1024 \
--vcpus=2 \
--disk path=/vmstorage/01/test01.img,size=5 \
--vnc \
--noautoconsole \
--os-variant=ubuntuutopic \
--hvm \
--cdrom /path/to/ubuntu-14.10-server-i386.iso
成功安装后,virsh dumpxml test01返回
<domain type='kvm' id='16'> <name>test01</name> <uuid>f58ca825-c999-4168-9f5a-616057d9955d</uuid> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> <vcpu placement='static'>2</vcpu> <resource> <partition>/machine</partition> </resource> <os> <type arch='x86_64' machine='pc-i440fx-utopic'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <cpu mode='custom' match='exact'> <model fallback='allow'>SandyBridge</model> </cpu> <clock offset='utc'> <timer name='rtc' tickpolicy='catchup'/> <timer name='pit' tickpolicy='delay'/> <timer name='hpet' present='no'/> </clock> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/kvm-spice</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/vmstorage/01/test01.img'/> <backingStore/> <target dev='vda' bus='virtio'/> <alias name='virtio-disk0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </disk> <disk type='block' device='cdrom'> <driver name='qemu' type='raw'/> <backingStore/> <target dev='hda' bus='ide'/> <readonly/> <alias name='ide0-0-0'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <controller type='usb' index='0' model='ich9-ehci1'> <alias name='usb0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x7'/> </controller> <controller type='usb' index='0' model='ich9-uhci1'> <alias name='usb0'/> <master startport='0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0' multifunction='on'/> </controller> <controller type='usb' index='0' model='ich9-uhci2'> <alias name='usb0'/> <master startport='2'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x1'/> </controller> <controller type='usb' index='0' model='ich9-uhci3'> <alias name='usb0'/> <master startport='4'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x2'/> </controller> <controller type='pci' index='0' model='pci-root'> <alias name='pci.0'/> </controller> <controller type='ide' index='0'> <alias name='ide0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='52:54:00:11:b2:c1'/> <source bridge='br0'/> <target dev='vnet0'/> <model type='virtio'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <source path='/dev/pts/0'/> <target port='0'/> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/0'> <source path='/dev/pts/0'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <graphics type='vnc' port='5900' autoport='yes' listen='0.0.0.0'> <listen type='address' address='0.0.0.0'/> </graphics> <video> <model type='cirrus' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </memballoon> </devices> <seclabel type='dynamic' model='apparmor' relabel='yes'> <label>libvirt-f58ca825-c999-4168-9f5a-616057d9955d</label> <imagelabel>libvirt-f58ca825-c999-4168-9f5a-616057d9955d</imagelabel> </seclabel> </domain>
我现在想要连接USB记忆棒.在一些googleing I found some sources之后,基本上所有建议采用以下方法：
>坚持主持人
>获取供应商和产品ID
root@host01:~# lsusb Bus 002 Device 004: ID 13fe:5100 Kingston Technology Company Inc. Flash Drive Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 004: ID 0624:0249 Avocent Corp. Bus 001 Device 003: ID 0624:0248 Avocent Corp. Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>通过virsh编辑test01将新的config-snippet添加到vm
<devices>
<!- ... ->
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<vendor id='0x13fe'/>
<product id='0x5100'/>
</source>
</hostdev>
</devices/>
>重启vm
之后,vm应该通过lsusb看到棒,但没有任何变化.如果我尝试将设备连接到第二个vm,virsh start< othervm>失败并显示错误：请求的操作无效：驱动程序QEMU,域test01正在使用USB设备002：003但是我仍然可以在主机上安装和访问操纵杆.我尝试了不同的操作系统和不同的操作系统(ubuntu和windows),但没有成功.
一些说明建议关闭apparmor,但/etc/init.d/apparmor stop没有改变任何东西.
这让我疯了,因为我没有收到任何错误或记录消息,我不知道如何找出问题所在.有关如何将USB连接到虚拟机的任何想法,或者至少如何进一步分析它？