解决方法

LXC 使用虚拟化管理服务来支持容器的网络桥接，libvirtd 使用桥接网络 virbr0，lxc-net.service 使用 lxcbr0 的桥接。
要启动 virbr0 网桥，请启动 libvirt 服务并使用 network.link 作为 virbr0 创建一个容器：

virbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.122.x netmask 255.255.255.0 broadcast 192.168.1xx.2xx
ether 52:54:00:be:71:21 txqueuelen 0 (Ethernet)

lxcbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.220.239.1 netmask 255.255.255.0 broadcast 0.0.0.0
inet6 fe80::fc37:c0ff:fe01:78d7 prefixlen 64 scopeid 0x20

# cat /container/ol6ctr4/config
# Template used to create this container: /usr/share/lxc/templates/lxc-oracle
# Parameters passed to the template:
# For additional config options, please look at lxc.container.conf(5)
lxc.network.type = veth
lxc.network.link = virbr0

容器：

# ip addr
11: eth0@if12: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
inet 192.168.122.xx/24 brd 192.168.122.255 scope global dynamic eth0

要启动 lxcbr0 网桥，请启动 lxc-net 服务并使用 network.link 作为 lxcbr0 创建一个容器。
然后验证容器是否获得了从 lxcbr0 地址范围分配的 IP 地址。

# cat /container/ol5ctr1/config
# Template used to create this container: /usr/share/lxc/templates/lxc-oracle
# Parameters passed to the template: --release=5.latest -a x86_64 --baseurl=http://yum.oracle.com/repo/OracleLinux/OL5/latest/x86_64
# For additional config options, please look at lxc.container.conf(5)
lxc.network.type = veth
lxc.network.link = lxcbr0
lxc.network.flags = up
lxc.network.hwaddr = 00:16:3e:52:59:7d
lxc.rootfs = /container/ol5ctr1/rootfs
# Common configuration
lxc.include = /usr/share/lxc/config/oracle.common.conf
# Container configuration for Oracle Linux 5.latest
lxc.arch = x86_64
lxc.utsname = ol5ctr1
lxc.cap.drop = sys_resource
lxc.cap.drop = setfcap setpcap
lxc.autodev = 0
# Networking
lxc.network.name = eth0
lxc.network.mtu = 1500

# ifconfig lxcbr0
lxcbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.112.62.XX netmask 255.255.255.0 broadcast 0.0.0.0

容器：

# ifconfig
eth0 Link encap:Ethernet HWaddr 00:16:3E:52:59:7D
inet addr:10.112.62.xx Bcast:10.112.62.xxx Mask:255.255.255.0

问题

如何使用 lxcbr0 和 virbr0 网络接口创建 lxc 容器？