Configure a rails 5.0 app to run inside docker using postgis 9.6, on Ubuntu 16.04

README.md

Run guard

docker-compose run -e "RAILS_ENV=test" app bundle exec guard

Import .sql file

cat dump.sql | docker container exec -i my_container_db_1 psql -U postgres my_database

docker-compose.yml

# PostGIS is a spatial database extender for PostgreSQL
db:
  image: mdillon/postgis:9.6
  ports:
    - "5432"

app:
  build: .
  command: bundle exec rails s -p 3000 -b '0.0.0.0'
  volumes:
    - .:/app
  ports:
    - "3000:3000"
  links:
    - db

Dockerfile

FROM ruby:2.3.1
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs

# postgresql repo for Ubuntu 16.04
RUN echo "deb http://apt.postgresql.org/pub/repos/apt/ xenial-pgdg main" > /etc/apt/sources.list.d/pgdg.list
RUN wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -

# install postgresql-client
RUN apt-get update && apt-get install -y postgresql-client-9.6 --no-install-recommends && rm -rf /var/lib/apt/lists/*

RUN mkdir -p /app
WORKDIR /app

COPY Gemfile Gemfile.lock ./
RUN gem install bundler && bundle install --jobs 20 --retry 5

COPY . ./

EXPOSE 3000

CMD ["bundle", "exec", "rails", "server", "-b", "0.0.0.0"]