RubyApp Dockerfile for staging

Dockerfile.rails-base

# Building rails-base image for the rubyapp
FROM phusion/passenger-ruby22
MAINTAINER Pradeep "[email protected]"

# Set correct environment variables.
ENV HOME /root

# Use baseimage-docker's init process.
CMD ["/sbin/my_init"]

# Enable nginx, add user `app` to group `www-data`, gemrc config
# open nginx log directory to the group so that `app` user process can write
RUN rm -f /etc/nginx/sites-enabled/default* \
    && rm -f /etc/nginx/sites-available/default* \
    && rm -f /etc/service/nginx/down \
    && usermod -aG www-data app \
    && chmod -R 0775 /var/log/nginx \
    && echo "gem: --no-document" > /home/app/.gemrc

# docker-rubyapp.pub is added to github.com
ADD ./ssh/docker-rubyapp /root/.ssh/docker-rubyapp

# Up and running with git credentials
RUN chmod 600 /root/.ssh/docker-rubyapp \
    && touch /root/.ssh/known_hosts \
    && echo "IdentityFile /root/.ssh/docker-rubyapp" >> /etc/ssh/ssh_config \
    && ssh-keyscan github.com >> /root/.ssh/known_hosts

Dockerfile.staging

FROM rails-base
MAINTAINER Pradeep "[email protected]"

# Use baseimage-docker's init process.
CMD ["/sbin/my_init"]

# Staging
ENV RAILS_ENV staging

# Rails app directory
ENV APP_HOME /home/app/rubyapp

# Clone the app directory
RUN git clone [email protected]:xxxx/rubyapp.git $APP_HOME \
    && cd $APP_HOME \
    && git checkout tags/$(git tag -l | tail -1) \
    && chown -R app:app $APP_HOME \
    && rm -f $APP_HOME/config/database.yml

EXPOSE 80

# Copy .env and other secret files
COPY ./config/.env.staging $APP_HOME/.env \
     && ./config/secret-file $APP_HOME/config/

### Run migrations and compile assets
RUN bundle check \
    || bundle install --without development test deploy --path /home/app/.gem \
    && bundle exec rake assets:precompile \
    && bundle exec rake db:migrate \
    && /usr/sbin/nginx -c $APP_HOME/config/nginx.conf

nginx.conf

worker_processes 1;
pid /run/nginx.pid;
daemon on;

events {
  worker_connections 768;
}

http {
  sendfile on;
  tcp_nopush on;
  tcp_nodelay on;
  keepalive_timeout 65;
  types_hash_max_size 2048;

  include /etc/nginx/mime.types;
  default_type application/octet-stream;

  gzip on;
  gzip_disable "msie6";

  passenger_root /usr/lib/ruby/vendor_ruby/phusion_passenger/locations.ini;
  passenger_ruby /usr/bin/ruby;

  server {
    listen 80;
    server_name localhost;
    root /home/app/rubyapp/public;

    passenger_enabled on;
    passenger_app_env staging;
  }
}