没有IPv4地址分配给KVM虚拟机

我在设置KVM w时遇到了麻烦。 在Ubuntu 10.10中桥接networking。 我通过virsh启动我的虚拟机，之后我可以看到主机上的kvm进程和vnet设备，但是新的接口没有获得IPv4地址，所以我不能使用虚拟机！ 下面是一个虚拟机启动后可以看到的内容。

root@robin-desktop:~# virsh start meerkat Domain meerkat started root@robin-desktop:~# ps aux | grep kvm root 1411 0.0 0.0 0 0 ? S 18:20 0:00 [kvm-irqfd-clean] 119 3436 73.7 3.5 1213320 141076 ? Sl 18:48 0:05 /usr/bin/kvm -S -M pc-0.12 -enable-kvm -m 1024 -smp 1,sockets=1,cores=1,threads=1 -name meerkat -uuid dbf905dd-b05d-5c81-5fe4-ad421cd50ece -nographic -nodefaults -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/meerkat.monitor,server,nowait -mon chardev=monitor,mode=readline -rtc base=utc -boot c -drive file=/home/robin/kvm/meerkat/ubuntu-kvm/tmp6pwohf.qcow2,if=none,id=drive-ide0-0-0,boot=on,format=qcow2 -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -device virtio-net-pci,vlan=0,id=net0,mac=52:54:00:06:7e:9c,bus=pci.0,addr=0x3 -net tap,fd=40,vlan=0,name=hostnet0 -chardev pty,id=serial0 -device isa-serial,chardev=serial0 -usb -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 root 3455 0.0 0.0 11340 872 pts/0 S+ 18:49 0:00 grep --color=auto kvm root@robin-desktop:~# root@robin-desktop:~# ifconfig br0 Link encap:Ethernet HWaddr e0:cb:4e:bb:99:07 inet addr:192.168.1.15 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::e2cb:4eff:febb:9907/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2948 errors:0 dropped:0 overruns:0 frame:0 TX packets:2904 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1285644 (1.2 MB) TX bytes:612230 (612.2 KB) eth0 Link encap:Ethernet HWaddr e0:cb:4e:bb:99:07 inet6 addr: fe80::e2cb:4eff:febb:9907/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3835 errors:0 dropped:0 overruns:0 frame:0 TX packets:3845 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1817408 (1.8 MB) TX bytes:785533 (785.5 KB) Interrupt:47 Base address:0x2000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:63 errors:0 dropped:0 overruns:0 frame:0 TX packets:63 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:4869 (4.8 KB) TX bytes:4869 (4.8 KB) vnet0 Link encap:Ethernet HWaddr fe:54:00:06:7e:9c inet6 addr: fe80::fc54:ff:fe06:7e9c/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:20 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:0 (0.0 B) TX bytes:4137 (4.1 KB) root@robin-desktop:~# 

挖掘一下，守护进程日志文件中可能有线索：

 root@robin-desktop:~# tail -7 /var/log/daemon.log Dec 1 18:48:55 robin-desktop NetworkManager[3342]: SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/vnet0, iface: vnet0) Dec 1 18:48:55 robin-desktop NetworkManager[3342]: SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/vnet0, iface: vnet0): no ifupdown configuration found. Dec 1 18:48:55 robin-desktop NetworkManager[3342]: <warn> /sys/devices/virtual/net/vnet0: couldn't determine device driver; ignoring... Dec 1 18:48:55 robin-desktop modem-manager: (net/vnet0): could not get port's parent device Dec 1 18:48:56 robin-desktop avahi-daemon[3354]: Joining mDNS multicast group on interface vnet0.IPv6 with address fe80::fc54:ff:fe06:7e9c. Dec 1 18:48:56 robin-desktop avahi-daemon[3354]: New relevant interface vnet0.IPv6 for mDNS. Dec 1 18:48:56 robin-desktop avahi-daemon[3354]: Registering new address record for fe80::fc54:ff:fe06:7e9c on vnet0.*. 

我试过关掉avahi和networkingpipe理器 – 没有什么区别。

有没有人有类似的问题的经验？ 我有这个东西在Ubuntu 9.10上正常工作！

• 创build两个非常密切的build筑物之间的networking链接
• VirtualBox桥接适配器可以ping但不能curl
• iptables：匹配桥接接口的数据包
• Linux桥接不转发数据包
• 有没有办法确定哪个虚拟接口属于kvm主机中的虚拟机？

谢谢。

编辑：这是一些brctl输出：

root @ robin-desktop：〜＃brctl show

 bridge name bridge id STP enabled interfaces br0 8000.e0cb4ebb9907 no eth0 vnet0 

编辑2：这是主机上的networking接口文件

 robin@robin-desktop:~$ cat /etc/network/interfaces auto lo iface lo inet loopback auto eth0 iface eth0 inet manual auto br0 iface br0 inet dhcp bridge_ports eth0 bridge_stp off bridge_fd 0 bridge_maxwait 0 

我应该设置bridge_stp on吗？

编辑3：这里是libvirt xmlconfiguration，这是最初由ubuntu-vmbuilder创build的，我已经破解了它

 <domain type='kvm'> <name>meerkat</name> <uuid>dbf905dd-b05d-5c81-5fe4-ad421cd50ece</uuid> <memory>1048576</memory> <currentMemory>1048576</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc-0.12'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/home/robin/kvm/meerkat/ubuntu-kvm/tmp6pwohf.qcow2'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='52:54:00:06:7e:9c'/> <source bridge='br0'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </memballoon> </devices> </domain> 

 汽车virbr0
如果virbr0 inet静态
        地址192.168.10.1
        networking掩码255.255.255.224
         pre-up brctl addbr virbr0
        下降brctl delbr virbr0 

 <networking>
   <名称>默认</名称>
   <UUID> XXXXXXXXXXXX-XXXXXXXX-XXXXXXXXXXXX </ UUID>
   <bridge name ='virbr0'stp ='on'forwardDelay ='0'/>
   <domain name ='virt.example.com'/>
 </networking>