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INTERNAL_IP

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BUCKET

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Cloud

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This course is your field manual for building Rails applications with Docker. 

To kick things off, you’ll start by learning the basics of Docker like architecture, images, and containers. You will then be introduced to Docker Compose and use it to build up to a multiservice application with Redis.

You will then work to get your Dockerized setup to play nice with JavaScript, using both the standard asset pipeline and webpacker, Rails’ newest approach for integrating modern JavaScript front ends.

Lastly, you will learn how to prepare your Rails app for production. Once ready, using Docker’s own tools, you will provision machines, create a cluster, deploy the app, and scale the app’s resources to meet its changing needs.

By the end of the course, you will be able to confidently use Docker in any of your further projects.

Docker for Rails Developers

## Byebug debugger
No chapter on testing would be complete without some mention of how to
debug our application when it is not behaving as we would expect. Imagine there is a problem with our `welcome_controller.rb`. 

Let’s use the `byebug` debugger that is included as standard with a Rails app. Let’s add a `byebug` breakpoint to our `welcome_controller.rb`:


# Byebug debugger
No chapter on testing would be complete without some mention of how to
debug our application when it is not behaving as we would expect. Imagine there is a problem with our `welcome_controller.rb`. 

Let’s use the `byebug` debugger that is included as standard with a Rails app. Let’s add a `byebug` breakpoint to our `welcome_controller.rb`:


Learn how to debug your app using byebug.

Debugging

Introduction

A Brave New World

Running a Rails App in a Container

Fine-Tuning Our Rails Image

Describing Our App Declaratively with Docker Compose

Beyond the App: Adding Redis

Docker for Rails Developer—Exam 1

Adding a Database: Postgres

Playing Nice with JavaScript

Testing in a Dockerized Environment

Advanced Gem Management

Some Minor Irritations

Docker for Rails Developer—Exam 2

The Production Landscape

Preparing for Production

A Production-Like Playground

Deploying to the Cloud

Docker for Rails Developer - Exam 3

Closing Thoughts and Next Steps

APPENDIX

Debugging

Byebug debugger