Dockerfile for Ruby on Rails development environment.

Dockerfile

# Core image
FROM ubuntu:17.04

# Install dependencies
RUN apt-get update && apt-get install -y git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties software-properties-common libffi-dev nodejs

# Install Ruby
RUN apt-get update && apt-get install -y ruby ruby-dev ruby-bundler
RUN rm -rf /var/lib/apt/lists/*
RUN echo $(ruby -v)

# Install Rails
RUN gem update --system
RUN gem install bundler
RUN gem install rails
RUN echo $(rails -v)

# Create data drive to connect to host machine
RUN mkdir /data

# Install PostgreSQL 9.5
RUN apt-get update && apt-get install wget

RUN echo 'deb http://apt.postgresql.org/pub/repos/apt/ zesty-pgdg main' > /etc/apt/sources.list.d/pgdg.list
RUN wget --quiet -O - http://apt.postgresql.org/pub/repos/apt/ACCC4CF8.asc | apt-key add -
RUN apt-get update && apt-get install -y postgresql-common postgresql-9.5 libpq-dev

# /------- Test to make Postgres db persistent (not functioning properly) -------\

# Move postgres db to /data drive
# RUN mkdir /data/db
# RUN rsync -av /var/lib/postgresql /data/db
# RUN mv /var/lib/postgresql/9.5/main /var/lib/postgresql/9.5/main.bak

# Update postgres config file to point to the new database location
# RUN mv /etc/postgresql/9.5/main/postgresql.conf /etc/postgresql/9.5/main/postgresql.conf.bak
# RUN wget --quiet -P /etc/postgresql/9.5/main/ https://goo.gl/Dbzqg3
# RUN mv /etc/postgresql/9.5/main/Dbzqg3 /etc/postgresql/9.5/main/postgresql.conf
# RUN ls /etc/postgresql/9.5/main

# /------- End Test to make Postgres db persistent -------\

# Switch to postgres user and set postges user password
USER postgres
RUN /etc/init.d/postgresql start \
    && psql --command "ALTER USER postgres WITH SUPERUSER PASSWORD 'password';"
RUN echo $(/etc/init.d/postgresql status)

# Switch back to root user
USER root

# Add VOLUMEs to allow backup of config, logs, databases and Ruby gems
VOLUME  ["/etc/postgresql", "/var/log/postgresql", "/var/lib/postgresql", "/usr/local/bundle", "/data/db" ]

EXPOSE 3000

# /--------------------------------------------------------/
# This is just procedure and has no bearing on how the image is built, this can be deleted. These are process notes.

# Build process
# docker build -t [name_your_image] .

# Run this command at run (this runs your image and exposes port 3000):
# docker run -it -p 3000:3000 -v c:/Users:/data [name_of_your_image] bash

# Start postgres
# service postgresql start

# Move to your mounted shared drive /data
# cd data

# Move to your project folder
# cd [windows_username]/Desktop/project  (<- example location)

# Create new rails project
# rails new [rails_project_name] --database=postgresql

# Move into rails directory
# cd [rails_project_name]

# Open your rails database.yml file on host machine and edit database file
# Add these entries
# -> username: postgres
# -> password: [postgres_password]
# -> host: localhost

# Create your database
# rake db:create

# Run your rails application
# rails s -b 0.0.0.0

# On host machine visit localhost:3000 and your rails app should be running since we exposed this port to your host machine