bridge方式配置libvirt网络
1、network.xml
<network>
<name>local</name>
<bridge name="local"/>
<forward mode="route" dev="eth0"/>
<ip address="192.168.0.204" netmask="255.255.255.0">
<dhcp>
<range start="192.168.0.1" end="192.168.0.253"/>
</dhcp>
</ip>
</network>
其中192.168.0.204是host的ip，网关为192.168.0.254
root@204:/opt# virsh net-define network.xml root@204:/opt# virsh net-autostart local root@204:/opt# virsh net-start local
如果报错：
error: Failed to create network from network.xml
error: internal error Network is already in use by interface eth0
先 ifconfig eth0 down
2、修改 /etc/network/interface，只保留 lo
auto lo iface lo inet loopback dns-nameservers 192.168.0.254
3、开机自动启动脚本：
#!/bin/sh sleep 3 ifconfig eth0 up brctl add local eth0 route del default route add default gw 192.168.0.254 metric 0 dev local脚本加入/etc/rc.local中
4、重启机器 reboot，即可看到：
root@204:~# virsh net-list --all Name State Autostart ----------------------------------------- default active yes local active yes
eth0 Link encap:Ethernet HWaddr 00:1e:68:04:74:68
inet6 addr: fe80::21e:68ff:fe04:7468/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3085 errors:0 dropped:0 overruns:0 frame:0
TX packets:248 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:491876 (491.8 KB) TX bytes:43962 (43.9 KB)
Interrupt:18 Memory:fd9e0000-fda00000
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:167 errors:0 dropped:0 overruns:0 frame:0
TX packets:167 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:8376 (8.3 KB) TX bytes:8376 (8.3 KB)
local Link encap:Ethernet HWaddr 00:1e:68:04:74:68
inet addr:192.168.0.204 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1308 errors:0 dropped:0 overruns:0 frame:0
TX packets:238 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:132498 (132.4 KB) TX bytes:41842 (41.8 KB)
virbr0 Link encap:Ethernet HWaddr ea:44:0a:49:d4:50
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
root@204:/opt# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default 192.168.0.254 0.0.0.0 UG 0 0 0 local 192.168.0.0 * 255.255.255.0 U 0 0 0 local 192.168.122.0 * 255.255.255.0 U 0 0 0 virbr0 root@204:/opt#
虚拟机就可以使用和主机在同一个网段的ip了，在domain的配置文件中interface的配置段：
<interface type='bridge'>
<source bridge='local' />
<mac address="00:2c:be:1a:fa:80"/>
<model type="virtio" />
</interface>