AWS_ACCESS_KEY_ID

AWS_SECRET_ACCESS_KEY

AWS_DEFAULT_REGION

INTERNAL_IP

IP_PORT

SWARM_TOKEN

BUCKET

DIGITAL_OCEAN_TOKEN

Gain insights into Docker architecture, images, and containers. Delve into Docker Compose, JS integration, and production readiness. Master deploying, clustering, and scaling Rails apps using Docker tools.

tarball.tar.gz

simpleJob

simpleJob2

simpleJob-copy

viewImages

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RSpec-Ch8_2

RSpec-Ch8_2_1

RSpec-Ch8_3

runRailsUsingCustomImage

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RSpec-Ch8_5

RSpec-Ch8_6

RSpec-Ch8_6_GUI

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dockerComposePostgres1

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postgress_last_lesson

Ch12_2

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gem_1

gem_2

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Cloud

Cloud_DO

Cloud_1

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Cloud_2_2

Cloud_2_4

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Cloud_1_1_bucket

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Cloud_DO_2

chap4_1

chap5_3

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challenge

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testing

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chap5_3-copy

chap5_4-copy

dockerComposeRedis3-copy-iwrz0a

postgress_2nd_last_lesson-copy

postgress_last_lesson-copy

webPackerCh7_2-copy

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

# Highlights 

Now that you have had your first taste of Docker, let’s review what we have learned. 

1. We ran our first ever Docker command—a `helloworld` Ruby script—without needing Ruby installed in our environment by using:
   ```text
   $ docker run ruby:2.7 ruby -e "puts :hello" 
   ```

2. We saw how to list our running containers with `docker ps` and all containers 
(including stopped ones) with `docker ps -a`.

3. We deleted old containers with `docker rm <container id>` and saw how to create throwaway containers using the `docker run`’s `--rm` option. 

5. We generated a new Rails project using a container by:
 
   * starting an interactive Bash shell 
     running inside a container by using:

     ```text
     $ docker run -i -t --rm -v ${PWD}:/usr/src/app ruby:2.7 bash 
     ```
   
   * installing the Rails gem inside the container by `gem install rails`

   * using the freshly installed Rails gem 
      to generate our project with 
      
     ```text
     $ rails new myapp --skip-test \ --skip-bundle
     ```



Nice. ✨ We are well on our way to Docker proficiency. 

# What to expect in the next chapter?
In the next chapter, we will learn how to run our new Rails application. 


Let's review what we have learned so far.

Quick Recap

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

Quick Recap

Highlights