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

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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

# Highlights

In this chapter, we took a step back to fill in some context around choosing your production platform, and we discussed what’s involved with deploying and operating applications. Although much of this may have already been familiar to you, we took a very Docker-centric slant to understand how the
production landscape differs once you have adopted Docker.

In particular:

1. We reviewed what is meant by **“Ops”** and explored how using Docker answers some common questions.

2. We learned about **orchestration tools**, which provide us with a platform for creating and managing compute clusters capable of delivering and running our containerized apps in a resilient way.

3. We discussed **Swarm** and **Kubernetes**, giving a brief outline of their relative
strengths and weaknesses.

4. We considered the decision of whether to build on top of an **IaaS platform**
or go the more managed route with a **CaaS provider**.

5. We looked at the tools you might use to provision IaaS infrastructure.

6. We had a quick tour of some popular CaaS platforms.

7. We considered the trade-offs involved in deciding which platform and tools are right for you.

# What to expect in the next chapter?

Armed with these insights, let’s dive back into the practical details again, and
turn our attention to prepping our app for production. Full steam ahead!

Let's recap what we learned in this chapter.

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