How to use local proxy settings in docker-compose

Question

I am setting up a new server for our Redmine installation, since the old installation was done by hand, which makes it difficult to update everything properly. I decided to

Answer 1

I did a bit more research and seem to have used better key words because I found my solution now. I wanted to share the solution with everyone, in case someone else may ever need it.

• Create folder for configuring docker service through systemd

  mkdir /etc/systemd/system/docker.service.d

• Create service configuration file at /etc/systemd/system/docker.service.d/http-proxy.conf and put the following in the newly created file

[Service]
 # NO_PROXY is optional and can be removed if not needed
 # Change proxy_url to your proxy IP or FQDN and proxy_port to your proxy port
 # For Proxy server which require username and password authentication, just add the proper username and password to the URL. (see example below)

 # Example without authentication
 Environment="HTTP_PROXY=http://proxy_url:proxy_port" "NO_PROXY=localhost,127.0.0.0/8"

 # Example with authentication
 Environment="HTTP_PROXY=http://username:password@proxy_url:proxy_port" "NO_PROXY=localhost,127.0.0.0/8"

• Reload systemctl so that new settings are read

  sudo systemctl daemon-reload

• Verify that docker service Environment is properly set

  sudo systemctl show docker --property Environment

• Restart docker service so that it uses updated Environment settings

  sudo systemctl restart docker

Now you can execute the docker-compose command on your machine without getting any connection refused error messages.

Answer 2

For the proxy server which requires username and password for authentication: Apart from adding the credentials in /etc/systemd/system/docker.service.d/http-proxy.conf, as suggested in this answer, I also had to add the same to the Dockerfile. Following is a snippet from the Dockerfile.

FROM ubuntu:16.04

ENV http_proxy http://username:password@proxy_url:proxy_port
ENV https_proxy http://username:password@proxy_url:proxy_port

RUN apt-get update \
    && apt-get upgrade -y \
    && apt-get install -y \
    build-essential \
    bla bla bla ...