Docker has a run option net=host documented here that allows you to run a virtual machine that shares the network stack with the host — for example, processes inside the docker container can connect to the host machine via localhost and vice versa. To prevent ARP collisions on a local network, the Docker daemon generates a random MAC address from the allocated IP address. Allocating ports. You will find yourself either in the fixed-port-allocation or in the dynamically-port-allocation camp. This can be per service/application or as a global strategy, but you must make up your mind.
This information is as of 2018-03-31 with Docker 18.03.0-ce I wanted to access host port from a docker container. For example, an nginx process is running on the host machine with port 8888 open, then I would like to create a container which can curl host:8888. I know how to discover container-to-container, but don't know how to get host IP address from a container. Therefore, I wandered the internet.
Precondition I mainly use Docker for Mac, but sometimes use Linux. So I want my containers to run on both platform. TL;DR Host networking mode? I found Docker has 'host networking mode'.
With this mode, the container seems to be able access to the host with '127.0.0.1'. So I tried it and it works on my Linux machine, but it didn't work on my Mac. Then I found: The host networking driver only works on Linux hosts, and is not supported on Docker for Mac, Docker for Windows, or Docker EE for Windows Server. Let me find another way please. I found I can resolve host.docker.internal as the host IP address in the container on Docker for Mac. That's what I wanted to know!
Where's Linux version of it.? (´・ω・`) NotFound. In addition, I was a little bit confused there're several names:. docker.for.mac.localhost.