Docker: Failed to connect to localhost port 80: Connection refused

Question

In my docker file while building i want to access files on my host machine from localhost server rather than copying them to the docker context folder (ie the place where Dockerfile is located)

FROM busybox
RUN curl -L http://localhost/latest/myfile -o /root/myfile

I get errror:

$ docker build -t archlinux/test .
... from localhost : Failed to connect to localhost port 80: Connection refused

So how to do it.

Solution: to use localhost/file

Use IP of the localhost for that change the

Listen 127.0.0.1:80 to Listen 80

Or

Best solution is use --network=host

docker build --network=host -t test .

Answer 1

This curl request has some deeper sense?

Dockerfile can be used anywhere (not only in your machine). For example, I would like to download the Dockerfile and build an image based on this file... I need to serve a resource(myfile) with a www server and run docker build with --network=host parameter - a bit annoying.

I think you should use COPY command for this job.

Answer 2

如果您在 Linux 上使用 Docker，则在运行docker run或docker build命令时需要使用--network="host"作为参数，那么您的主机的 localhost 127.0.0.1将可供您的 docker 容器访问。