Dockerised Rails Development Environment (take 1)

.gitignore

# See https://help.github.com/articles/ignoring-files for more about ignoring files.
#
# If you find yourself ignoring temporary files generated by your text editor
# or operating system, you probably want to add a global ignore instead:
#   git config --global core.excludesfile '~/.gitignore_global'

# Ignore bundler config.
/.bundle

# Ignore all logfiles and tempfiles.
/log/*
/tmp/*
!/log/.keep
!/tmp/.keep

# Ignore Byebug command history file.
.byebug_history
postgres-data

README.md

A Dockerised Rails Development Environment

Uses Docker Compose, Postgres, etc.

This is a modification of this article: https://docs.docker.com/compose/rails/

Set up the docker file, gemfile, etc. Don't forget to modify your your config/database.yml (see below)

Change your environment.rb file to allow the web console to be rendered for the guest os. e.g.: config.web_console.whitelisted_ips = '172.18.0.0/16'

General operation...

1. Run docker-compose up
2. First time, open a new tab and run docker-compose run web rake db:setup
3. Use docker-compose run web bash to connect and do useful stuff (e.g. rails console)
4. Use docker-compose down to gracefully shut things down. If not, you might have to docker-compose run web rm /myapp/tmp/pids/server.pid

database.yml

default: &default
  adapter: postgresql
  encoding: unicode
  host: db
  username: postgres
  password:
  pool: 5

development:
  <<: *default
  database: myapp_development


test:
  <<: *default
  database: myapp_test

docker-compose.yml

version: '3'
services:
  db:
    image: postgres
    #persist data
    volumes:
      - ./postgres-data:/var/lib/postgresql/data

  web:
    build: .
    #command: bundle exec bash
    #rails s -p 3000 -b '0.0.0.0'
    command: bundle exec rails s -p 3000 -b '0.0.0.0'
    volumes:
      - .:/myapp
    ports:
      - "3000:3000"
    depends_on:
      - db

Dockerfile

FROM ruby:2.3.3
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs
RUN mkdir /myapp
WORKDIR /myapp
ADD Gemfile /myapp/Gemfile
ADD Gemfile.lock /myapp/Gemfile.lock
RUN bundle install
ADD . /myapp