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Running Rails 5.0.1 + PostGIS + puma + nginx in production using docker-compose 2 blog for this: https://medium.com/@sabman/running-rails-5-0-1-postgis-puma-nginx-in-production-using-docker-compose-2-d8d98cbef33c#.z9a3qqjar
APP_NAME=dockerized-rails
RAILS_ROOT=/usr/app/${APP_NAME}
RAILS_ENV=production
cd $APP_NAME
# Before we start we'll make sure that we have a scaffolded app just to make sure we can test everything is working.
docker-compose up
docker-compose run app bundle exec rails generate scaffold post title body:text published:boolean RAILS_ENV=development
docker-compose run app bundle exec rake db:migrate RAILS_ENV=development
# We can also make sure the development test works:
docker-compose run app bundle exec rake db:setup RAILS_ENV=test
docker-compose run app bundle exec rake test RAILS_ENV=test
mkdir -p containers/$RAILS_ENV
# Add nulldb gem to allow creating assets without a db connection
# read: http://blog.zeit.io/use-a-fake-db-adapter-to-play-nice-with-rails-assets-precompilation/"
echo "gem 'activerecord-nulldb-adapter'" >> Gemfile
# create Dockerfile
cat > containers/$RAILS_ENV/Dockerfile <<EOF
FROM ruby:2.3.1-slim
ENV RAILS_ROOT=/usr/app/${APP_NAME}
ENV RAILS_ENV=production
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev postgresql-client libproj-dev nodejs
# Dependencies for rgeo
RUN apt-get --no-install-recommends -y install libgeos-dev libproj-dev
# Add libgeos symlinks for rgeo gem to be able to find it
RUN ln -sf /usr/lib/libgeos-3.4.2.so /usr/lib/libgeos.so && ln -sf /usr/lib/libgeos-3.4.2.so /usr/lib/libgeos.so.1
RUN mkdir -p \$RAILS_ROOT/tmp/pids
WORKDIR \$RAILS_ROOT
COPY Gemfile Gemfile
COPY Gemfile.lock Gemfile.lock
RUN bundle check || bundle install --without development test -j4
COPY config/puma.rb config/puma.rb
COPY . .
RUN mkdir -p /etc/nginx/conf.d/
COPY ./containers/${RAILS_ENV}/nginx.conf /etc/nginx/conf.d/default.conf
RUN DB_ADAPTER=nulldb bundle exec rails assets:precompile RAILS_ENV=production
EXPOSE 3000
EOF
# create a compose file
cat > containers/${RAILS_ENV}/docker-compose.yml <<EOF
version: '2'
services:
nginx:
image: nginx:1.11.9
volumes_from:
- app
depends_on:
- app
ports:
- 80:80
db:
image: mdillon/postgis:9.6
ports:
- 5432:5432
env_file:
- containers/${RAILS_ENV}/.env
volumes:
- data:/var/lib/postgresql/db-data
app:
build:
context: .
dockerfile: containers/${RAILS_ENV}/Dockerfile
env_file:
- containers/${RAILS_ENV}/.env
command: containers/scripts/wait-for-it.sh db:5432 -- containers/${RAILS_ENV}/entrypoint
volumes:
- assets:/usr/app/${APP_NAME}/public/assets
- nginx_config:/etc/nginx/conf.d
depends_on:
- db
ports:
- 3000:3000
volumes:
assets:
external: false
data:
external: false
nginx_config:
external: false
EOF
# add app specific nginx.config
SERVER_NAME="${APP_NAME}.prod"
cat > containers/production/nginx.conf <<EOF
upstream rails_app {
server app:3000;
}
server {
listen 80;
keepalive_timeout 10;
server_name ${SERVER_NAME};
root /usr/app/${APP_NAME}/public;
location / {
proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
proxy_set_header Host \$http_host;
# If the file exists as a static file serve it directly without
# running all the other rewrite tests on it
if (-f \$request_filename) {
break;
}
if (-f \$request_filename/index.html) {
rewrite (.*) \$1/index.html break;
}
if (-f \$request_filename.html) {
rewrite (.*) \$1.html break;
}
if (!-f \$request_filename) {
proxy_pass http://rails_app;
break;
}
}
location ~* \.(ico|css|gif|jpe?g|png|js)(\?[0-9]+)?\$ {
expires max;
break;
}
# Error pages
# error_page 500 502 503 504 /500.html;
location = /500.html {
root /usr/app/${APP_NAME}/public;
}
}
EOF
PGPASSWORD=`openssl rand -base64 8`
cat > containers/${RAILS_ENV}/.env <<EOF
PGPASSWORD=${PGPASSWORD}
POSTGRES_PASSWORD=${PGPASSWORD}
RAILS_ENV=production
RACK_ENV=production
RAILS_ROOT=/usr/app/${APP_NAME}
SECRET_KEY_BASE=`docker-compose run app bundle exec rake secret`
EOF
cat >> config/database.yml <<EOF
${RAILS_ENV}:
<<: *default
database: ${APP_NAME}_${RAILS_ENV}
EOF
cat > containers/${RAILS_ENV}/entrypoint <<EOF
#!/bin/bash
set -e
if [[ -a /tmp/puma.pid ]]; then
rm /tmp/puma.pid
fi
bundle exec rake db:create
bundle exec rake db:migrate
if [[ \$RAILS_ENV == "production" ]]; then
rake assets:precompile
mkdir -p /etc/nginx/conf.d/
cp containers/${RAILS_ENV}/nginx.conf /etc/nginx/conf.d/default.conf
fi
rails server -b 0.0.0.0 -P /tmp/puma.pid
exec "\$@"
EOF
chmod +x containers/${RAILS_ENV}/entrypoint
rm docker-compose.yml
ln -s containers/${RAILS_ENV}/docker-compose.yml
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