Docker如何将MAC地址分配给容器？ [英] How does the Docker assign MAC addresses to containers?

问题描述

当我启动新的容器时，Docker会自动为它们分配一些MAC地址。我很好奇，如果有这种作业的模式。可以更改MAC地址吗？

When I start new containers, Docker automatically assigns some MAC address to them. I am curious if there is a pattern to this assignment. Can the MAC address be changed?

$ docker网络检查桥

$ docker network inspect bridge

"Containers": {
            "3386a527aa08b37ea9232cbcace2d2458d49f44bb05a6b775fba7ddd40d8f92c": {
                "EndpointID": "647c12443e91faf0fd508b6edfe59c30b642abb60dfab890b4bdccee38750bc1",
                "MacAddress": "02:42:ac:11:00:02",
                "IPv4Address": "172.17.0.2/16",
                "IPv6Address": ""
            },
            "94447ca479852d29aeddca75c28f7104df3c3196d7b6d83061879e339946805c": {
                "EndpointID": "b047d090f446ac49747d3c37d63e4307be745876db7f0ceef7b311cbba615f48",
                "MacAddress": "02:42:ac:11:00:03",
                "IPv4Address": "172.17.0.3/16",
                "IPv6Address": ""
            }

推荐答案

Docker始终分配mac 02：42：ac：11：00：02 ainer然后每个不同的容器增加一个mac。

Docker start assigning always the same mac 02:42:ac:11:00:02 for the first container and then is increasing by one each mac for each different container.

不知道为什么他们正在使用该mac地址。似乎 02：42：ac 与oui数据库中的任何真正的供应商不匹配。看看关于这个的官方文档。他们说：

Not sure why they are using that mac address. It seems 02:42:ac doesn't match any real vendor in oui databases. Look at the official documentation about this. They say:

使用分配给容器的IP地址生成MAC地址，以避免ARP冲突，使用范围从02:42 ：ac：11：00：00到02：42：ac：11：ff：ff

The MAC address is generated using the IP address allocated to the container to avoid ARP collisions, using a range from 02:42:ac:11:00:00 to 02:42:ac:11:ff:ff

无论如何，你可以设置任何mac在docker运行命令中使用 - mac-address 参数对容器生成的地址。例如，执行这样的命令 docker run -ti --mac-address 00：00：00：00：00：11 ubuntu：trusty

Anyway, you can set any mac address on container generation using --mac-address parameter on the docker run command. For example doing a command like this docker run -ti --mac-address 00:00:00:00:00:11 ubuntu:trusty

希望有帮助。

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