我有一台运行 Ubuntu 16.04 的机器，上面有两个 LXC 容器ubuntu_lxc和ubuntu_lxc1.该机器有两个物理网络接口。我想显式地将每个接口桥接到每个容器，并完全分离两个容器之间的网络流量，以便运行两个不同的服务，每个服务都在一个容器上。
这两个物理接口应该有 DHCP、PPPoE 或静态 IP 地址，我将在 /etc/network/interfaces 中进行相应配置。
我正在使用本指南http://www.itzgeek.com/how-tos/linux/ubuntu-how-tos/setup-linux-container-with-lxc-on-ubuntu-16-04-14-04.html 创建容器和桥接。
这些是桥接的详细信息（在主机中）：cat /etc/network/interfaces
# The loopback network interface
auto lo
iface lo inet loopback
### bridge name ###
auto br0
auto br1
### bridge information ###
#br0
iface br0 inet dhcp
bridge_ports enp2s0
bridge_stp off
bridge_fd 9
# br1
iface br1 inet dhcp
bridge_ports enp1s0
bridge_stp off
bridge_fd 9
# The primary network interface
auto enp2s0
iface enp2s0 inet dhcp
# second network interface
auto enp1s0
iface enp1s0 inet dhcp
在本例中，我对两个接口都使用 DHCP。
这些是我拥有的接口（在主机中）：ifconfig
br0 Link encap:Ethernet HWaddr 00:e0:81:bb:cc:71
inet addr:192.168.0.102 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::2e0:81ff:febb:cc71/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1994 errors:0 dropped:0 overruns:0 frame:0
TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:386641 (386.6 KB) TX bytes:2004 (2.0 KB)
br1 Link encap:Ethernet HWaddr 00:e0:81:bb:cc:70
inet addr:10.0.1.2 Bcast:10.0.1.255 Mask:255.255.255.0
inet6 addr: fe80::2e0:81ff:febb:cc70/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:55 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:23506 (23.5 KB) TX bytes:1332 (1.3 KB)
enp1s0 Link encap:Ethernet HWaddr 00:e0:81:bb:cc:70
inet addr:10.0.1.2 Bcast:10.0.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2092 errors:0 dropped:0 overruns:0 frame:0
TX packets:218 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:601774 (601.7 KB) TX bytes:39572 (39.5 KB)
Interrupt:16 Memory:fdee0000-fdf00000
enp2s0 Link encap:Ethernet HWaddr 00:e0:81:bb:cc:71
inet addr:192.168.0.102 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:164151 errors:0 dropped:0 overruns:0 frame:0
TX packets:23218 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:226362607 (226.3 MB) TX bytes:1829585 (1.8 MB)
Interrupt:17 Memory:fdfe0000-fe000000
看看动态分配的IP地址，我怀疑br0已成功桥接到恩普2s0和br1到恩普1s0。
这是主机中容器的配置：cat /etc/lxc/default.conf
lxc.network.type = veth
lxc.network.link = br0
lxc.network.flags = up
lxc.network.hwaddr = 00:16:3e:xx:xx:xx
lxc.network.type = veth
lxc.network.link = br1
lxc.network.flags = up
lxc.network.hwaddr = 00:16:3e:xx:xx:xx
我还怀疑此配置将第一个容器关联到br0和第二个容器br1。
我可以从两个容器 ping 到互联网。但我似乎无法验证流量是否被隔离。
ifconfig从ubuntu_lxc（第一个容器）：
eth0 Link encap:Ethernet HWaddr 00:16:3e:77:2b:9c
inet addr:192.168.0.103 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::216:3eff:fe77:2b9c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:20 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3978 (3.9 KB) TX bytes:1332 (1.3 KB)
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:65536 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:1
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
ifconfig从ubuntu_lxc1（第二个容器）：
eth0 Link encap:Ethernet HWaddr 00:16:3e:f4:b8:f9
inet addr:192.168.0.106 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::216:3eff:fef4:b8f9/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:69 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:14203 (14.2 KB) TX bytes:1332 (1.3 KB)
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:65536 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:1
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
问题是：为什么ubuntu_lxc1容器分配的 IP 地址不同于br1在主机中（应该与该容器关联）？
如何将物理接口仅关联到特定容器？
如何验证流量已隔离？