如何从Docker容器获取远程计算机的MAC地址

Question

I am using python:3.6-alpine docker container.
I have a network service which finds MAC address of a supplied ip address. To find mac address of given remote machine say host=10.11.15.100 i'm using below python3 script.

import getmac 
mac_address = getmac.get_mac_address(ip=host)

When I run this script locally it gives proper mac address of provided host. But when I run it in docker container it gives None .
Note:- I am able to ping given host from docker container but unable to get mac address.

Answer 1

使用此命令获取容器的MacAddress

docker container inspect -f {{.NetworkSettings.MacAddress}} container-id

Answer 2

If you are able to ping given remote machine from docker container but unable to get the mac address that means either

1. MAC address is not available in the routing table
2. The host network interface is not available inside a Docker container.

For #1 case you can ping the machine which can add MAC address of that machine in the routing table.
For #2 case you can add a host network interface to Docker container.

eg. docker run --network="host" -it network_service:latest