Rob*_*bin 6 bridge kvm-virtualization
我在设置 KVM w 时遇到问题。Ubuntu 10.10 中的桥接网络。我正在通过 virsh 启动我的 VM，此后我可以在主机上看到 kvm 进程和 vnet 设备，但是新接口永远不会获得 IPv4 地址，因此我无法使用 VM！下面是 VM 启动后我可以看到的读数。
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:~#
稍微挖掘一下，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.*.
我试过关闭 avahi 和网络管理器 - 没有区别。
有没有人有类似问题的经验？我让这些东西在 Ubuntu 9.10 上运行正常！
谢谢。
编辑：这是一些 brctl 输出：
root@robin-desktop:~# brctl 显示
bridge name bridge id STP enabled interfaces
br0 8000.e0cb4ebb9907 no eth0
vnet0
编辑2：这是主机上的网络接口文件
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？
Edit3：这是 libvirt xml 配置，它最初是由 ubuntu-vmbuilder 创建的，我对它进行了一些修改
<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>
小智 6
-A FORWARD -m physdev --physdev-is-bridged -j ACCEPT 在 /etc/sysconfig/iptables 中，我添加了这一行以使我的 kvm 正常工作。
/etc/network/interfaces我使用静态地址定义虚拟机上的接口。虚拟机需要定义以太网接口。vnet在服务器上为虚拟机创建的设备。该vnet接口应在服务器上显示为已启动且未定义地址。该设备将在虚拟机上 vnet显示为类型接口。eth
如果以上输出适用于您的服务器，则br0您服务器上的地址应该适合虚拟机。 eth0服务器上应该有外部访问所需的任何地址。你还应该有一个vnet0我没有看到的设备。
编辑：我还通过 virsh 关闭了网络的自动启动。这是我的一个网桥的 /etc/network/initerfaces 定义。我相应地更新了我的 dhsmasq 配置。
自动虚拟机0
iface virbr0 inet 静态
地址 192.168.10.1
网络掩码 255.255.255.224
准备 brctl addbr virbr0
关闭后 brctl delbr virbr0
匹配网络定义为
<网络> <名称>默认</名称> <uuid>xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx</uuid> <网桥名称='virbr0'stp='on'forwardDelay='0'/> <域名='virt.example.com'/> </网络>