Docker Container Networking with Docker-in-Docker

Question

I would like to network with a child docker container from a parent docker container, with a docker-in-docker setup.

Let\'s say I\'m trying to connect to a simple Apache

Answer 1

I am very convinced that @Yuriy Znatokov's answer is what I want, but I have understood it for a long time. In order to make it easier for later people to understand, I have exported the complete steps.

1) From inside the docker:dind container

docker run -d --name mydind --privileged docker:dind
/ # docker run -d -p 8080:80 httpd:alpine
/ # curl localhost:8080
It works!

2) From inside the docker:latest container

docker run -d --name mydind --privileged docker:dind
docker run -it --link mydind:docker docker:latest sh
/ # docker run -d -p 8080:80 httpd:alpine
/ # curl mydind:8080
It works!