Docker setup for rails 4.0+ app with empty bundle container for caching with Vagrant for OS X

README.md

README

Development Environments

Linux

Use docker-compose docker-compose up to start the different services in the docker-compose.yml file

First time use

• docker-compose run web bundle exec rails db:create
• docker-compose run web bundle exec rails db:migrate

Mac

Mac needs a virtual environment, here using docker-osx-dev. Because vagrant was not stable enough for syncing files. run

curl -o /usr/local/bin/docker-osx-dev https://raw.githubusercontent.com/brikis98/docker-osx-dev/master/src/docker-osx-dev
chmod +x /usr/local/bin/docker-osx-dev
docker-osx-dev install

Add eval "$(boot2docker shellinit)" to your ~/.bashrc file, this will give you dockerhost hostname in the root folder docker-osx-dev this will sync the files from host machine to guest VM in a new tab run docker-compose up

docker-compose.yml

version: '2'
services:
  db:
    image: postgres
  web:
    build: .
    command: ./script_start
    volumes:
      - .:/myapp
    ports:
      - "3000:3000"
    depends_on:
      - db
    # This tells the webcontainer to mount the `bundle` images'
    # /bundle volumne to the `web` containers /bundle path.
    volumes_from:
      - box
  box:
    # 'image' will vary depending on your docker-compose
    # project name. you may need to run docker-compose build web
    # before this works
    image: busybox
    volumes:
      - /box

Dockerfile

FROM ruby:2.2.3
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev
ENV APP_HOME /myapp
RUN mkdir $APP_HOME
WORKDIR $APP_HOME

ENV BUNDLE_PATH /box

ADD . $APP_HOME

script_start

#!/bin/bash

bundle check || bundle install

# to remove the boring error messaged called server is still running error
rm  tmp/pids/server.pid

# use bundle exec and start rails on port 3000
bundle exec rails s -p 3000 -b 0.0.0.0