docker使用ip命令查看网卡信息时，eth0 变成了eth0@if7,在配置keepalived时，绑定不了虚拟ip - docker使用

如题：使用ifconfig

root@740f6c2001a5:/# ifconfig
eth0      Link encap:Ethernet HWaddr 02:42:ac:11:00:03
          inet addr:172.17.0.3 Bcast:0.0.0.0 Mask:255.255.0.0
          inet6 addr: fe80::42:acff:fe11:3/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:17435 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10251 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:25959882 (25.9 MB) TX bytes:750736 (750.7 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)

再使用：ip

root@740f6c2001a5:/# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> 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
6: eth0@if7: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
    link/ether 02:42:ac:11:00:03 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.17.0.3/16 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::42:acff:fe11:3/64 scope link
       valid_lft forever preferred_lft forever

eth0 变成了eth0@if7

新手学习配置nginx+keepalived 将eth0绑定虚拟ip总是不成功，相同的配置再虚拟机上就可以，所以猜测和eth0@if7有关系，请问该如何解决？

Docker version 1.9.1, build a34a1d5