AWS ElasticBeanstalk Ruby on Rails Docker

This is a Demo application related to the talk AWS Elastic Beanstalk & Docker for Rails developers

>>>>Talk Video<<<<

Pre-built application (puppies app) Docker images:

• https://hub.docker.com/r/equivalent/eb-demo-rails/
• https://hub.docker.com/r/equivalent/eb-demo-nginx/

Usage

Clone this repo and cd into it:

$ git clone git@github.com:equivalent/docker_rails_aws_elasticbeanstalk_demmo_app.git
$ cd docker_rails_aws_elasticbeanstalk_demmo_app

Once the application is running and is successfully connected to DB be sure to run rake db:seed inside the container. You can leart out how to run commands inside Docker container here.

Running production application locally

Production version of docker-compose.yml is located in the root folder of this git repo.

to run in production mode, all you need to do:

1. install Docker and docker-compose
2. $ docker-compose up or $ sudo docker-compose up

Running application locally (development mode)

docker-compose -f docker-compose-development.yml up

Running production application on AWS Elastic Beanstalk

Elastic Beanstalk's Dockerrun.aws.json is located in ./aws_elastic_beanstalk.

In that folder is separate README.md file containing useful information on AWS Elastic Beanstalk CLI

Steps to lunch "puppies" demo application in AWS Elastic Beanstalk:

Step 1: Configure new Docker based AWS Beanstalk Enviroment, PostgreSQL RDS, Redis Elastic Cache and ensure the Security Groups are set in a way that endpoints can communicate to each other. In order to achieve this you can follow steps in this article: http://www.eq8.eu/blogs/34-set-up-aws-elastic-beanstalk

Web interface deployment:

Step 2:: Once in the configured EB environment, from web interface Click "Upload" and chose ./aws_elastic_beanstalk/Dockerrun.aws.json.

CLI deployment:

Step 2:: Install and configure EB CLI. You can find my instructions on EB CLI here

Step 3: $ cd ./aws_elastic_beanstalk and $ eb deploy

Nginx proxy container

Nginx image source code located in ./nginx folder.

How lunch stuff / debug app inside the Docker containers

From host machine you can lunch:

bash docker/puppiesbash.sh    # enter bash in the puppies_web container
bash docker/puppiesconsole.sh # enter rails console in the puppies_web container
bash docker/puppiespry.sh     # pry debugger - where you introduce `binding.pry`

bash docker/nginxbash.sh      # enter bash in the proxy container

Or manually type:

docker ps
docker exec -it xxIdOfAContainerxx  bash

How to Build Docker image and how to push a change to Docker registry

docker-compose build
docker-compose push

Other Resources

Articles

• http://www.eq8.eu/blogs/25-common-aws-elastic-beanstalk-docker-issues-and-solutions

How the Ruby on Rails application was generated

mkdir docker_rails_aws_elasticbeanstalk_demo_app
cd docker_rails_aws_elasticbeanstalk_demo_app

gem install bundler rails

rails new puppies --skip-test --skip-action-mailer

rake db:create
rake db:seed