可以为docker build设置一个MAC地址吗? [英] Is it possible to set a MAC address for `docker build`?

问题描述

使用docker run，可以使用--mac-address选项修复MAC地址.我已经查看过，但找不到用docker build修复MAC地址的方法.我想将具有固定在MAC地址上的许可证的软件码头化(我不打算散布许可证；我想要的是更具可复制性的系统架构).

With docker run, it’s possible to fix the MAC address with the --mac-address option. I’ve looked, and I can’t find a way to fix the MAC address with docker build. I am wanting to dockerize software that has a license fixed to a MAC address (I’m not trying to get around the license; I’m trying to have a more reproducible system architecture).

谢谢！

推荐答案

让我们考虑以下Dockerfile

Let's consider the below Dockerfile

FROM alpine
RUN ifconfig | grep -i hwaddr

如果您使用它构建

docker build .

你得到

Sending build context to Docker daemon  2.048kB
Step 1/2 : FROM alpine
 ---> 7328f6f8b418
Step 2/2 : RUN ifconfig | grep -i hwaddr
 ---> Running in c092838dbe31
eth0      Link encap:Ethernet  HWaddr 02:42:AC:11:00:02
Removing intermediate container c092838dbe31
 ---> 7038787f51b8

现在我们无法控制docker build的Mac地址，但是我们可以控制build的网络，也可以控制容器的mac地址.因此，让我们用我们的mac地址启动一个容器

Now we can't control Mac address of docker build, but we can control the network of build and we can control mac address of a container. So let us launch a container with our mac address

$ docker run --name mac1234deb06b61 --mac-address="12:34:de:b0:6b:61" -d alpine tail -f /dev/null
c3579e4685933b757f51c5f9e36d620dbe3a62abd0e0d6a421b5f1c04045061c

$ docker build --network container:mac1234deb06b61 --no-cache .
Sending build context to Docker daemon  2.048kB
Step 1/2 : FROM alpine
 ---> 7328f6f8b418
Step 2/2 : RUN ifconfig | grep -i hwaddr
 ---> Running in 4390f13cbe8f
eth0      Link encap:Ethernet  HWaddr 12:34:DE:B0:6B:61
Removing intermediate container 4390f13cbe8f
 ---> b0b5f7321921
Successfully built b0b5f7321921

如您所见，现在docker构建采用了更新的mac地址

As you can see, now the docker build takes a updated mac address

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