配置桥接网卡

添加桥接网卡br0，注释掉已有的eth0配置

[root@ubuntu01 ~]# vi /etc/network/interfaces

# This file describes the network interfaces available on your system

# and how to activate them. For more information, see interfaces(5).

# The loopback network interface

auto lo

iface lo inet loopback

# The primary network interface

#auto eth0

#iface eth0 inet dhcp

auto br0

iface br0 inet static

address 192.168.31.10

netmask 255.255.255.0

broadcast 192.168.31.255

gateway 192.168.31.2

bridge_ports eth0

bridge_fd 9

bridge_hello 2

bridge_maxage 12

bridge_stp off

重启网络后，就可以看到桥接网卡的配置了：

[root@ubuntu01 ~]# brctl show

bridge name bridge id STP enabled interfaces

br0 8000.000c29acc95e no eth0

virbr0 8000.000000000000 yes

[root@ubuntu01 ~]# ip add

1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

valid_lft forever preferred_lft forever

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: eth0: mtu 1500 qdisc pfifo_fast master br0 state UP group default qlen 1000

link/ether 00:0c:29:ac:c9:5e brd ff:ff:ff:ff:ff:ff

inet6 fe80::20c:29ff:feac:c95e/64 scope link

valid_lft forever preferred_lft forever

3: br0: mtu 1500 qdisc noqueue state UP group default qlen 1000

link/ether 00:0c:29:ac:c9:5e brd ff:ff:ff:ff:ff:ff

inet 192.168.31.10/24 brd 192.168.31.255 scope global br0

valid_lft forever preferred_lft forever

inet6 fe80::20c:29ff:feac:c95e/64 scope link

valid_lft forever preferred_lft forever

4: virbr0: mtu 1500 qdisc noqueue state DOWN group default qlen 1000

link/ether 32:33:c1:58:2a:87 brd ff:ff:ff:ff:ff:ff

inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0

valid_lft forever preferred_lft forever

创建虚拟机

virt-install 的--network选项指定bridge：

[root@ubuntu01 ~]# virt-install \

--name=centos_vm_01 \

--virt-type=kvm \

--ram=1024 \

--cdrom=/data/iso/CentOS-V6.5.23.iso \

--disk path=/data/img/disk01.raw \

--network bridge=br0 \

--graphics vnc,listen=0.0.0.0 \

--noautoconsole