从Docker容器访问主机的ARP表 [英] Acessing ARP table of Host from Docker container

问题描述

如何从Docker容器中访问主机ARP记录?

How can I access the host ARP records from within a Docker container?

我试图在docker-compose文件中挂载一个卷/proc/net/arp:/proc/net/arp ，但发现我无法使用/proc .然后，我尝试将其安装在其他地方，例如/proc/net/arp:/root/arp ，但是如果我 cat/root/arp ，则从容器内部，桌子出来是空的.

I tried to mount a volume (in a docker-compose file) /proc/net/arp:/proc/net/arp but found out that I can't make any volume with /proc. Then I tried to mount it elsewhere like /proc/net/arp:/root/arp, but then if I cat /root/arp, from within the container, the table comes out empty.

docker run -v /proc/net/arp:/root/arp alpine cat /root/arp     <-- returns empty table

想法?

推荐答案

如果添加特权模式并确保您处于主机联网模式，则应该很好.这对我有用:

You should be good if you add privileged mode and make sure you're in host networking mode. This worked for me:

>$ docker run --net host --privileged -v /proc/net/arp:/host/arp alpine cat /host/arp

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