Using --add-host or extra_hosts with docker-compose

docker hosts docker-compose
Pieter picture Pieter · Mar 16, 2015 · Viewed 116.2k times · Source

I am using docker-compose to run a test environment, that consists of about 5 different containers. The inter-container links and the shared volumes (volumes-from) works wonderfully. I also expose some ports up to the host machine, which works nicely.

What I am missing is a way to link some of my real servers into this environment, without hardcoding ip address. With docker run, you could use --add-host to add another line in your /etc/hosts file. Is there any way to do something similar with docker-compose?

Answer

jpetazzo picture jpetazzo · May 30, 2015

I have great news: this will be in Compose 1.3!

I'm using it in the current RC (RC1) like this:

rng:
  build: rng
  extra_hosts:
    seed: 1.2.3.4
    tree: 4.3.2.1

Related questions

How to update /etc/hosts file in Docker image during "docker build"

I want to update my /etc/hosts file during "docker build". I added below line in Dockerfile but it's neither updating /etc/hosts file nor giving any error. RUN echo "192.168.33.11 mynginx" >> /etc/hosts I need to update /etc/…

Read More
How to get a Docker container's IP address from the host

Is there a command I can run to get the container's IP address right from the host after a new container is created? Basically, once Docker creates the container, I want to roll my own code deployment and container configuration …

Read More
How to copy files from host to Docker container?

I am trying to build a backup and restore solution for the Docker containers that we work with. I have Docker base image that I have created, ubuntu:base, and do not want have to rebuild it each time with …

Read More