Docker for Rails Developers (For Den Patin) by Isenberg, Rob -- Read -- Imperial Library of Trantor

Index

Docker for Rails Developers

About the Pragmatic Bookshelf Table of Contents Early Praise for Docker for Rails Developers Acknowledgements Introduction

What Is Docker? Why Use Docker? Who Should Read This Book? What’s in This Book? How to Read This Book Which Operating Systems Are Supported? Online Resources

Part 1: Development

Chapter 1: A Brave New World

Installing Docker Verifying Your Install Befor e We Begin Running a Ruby Script Without Ruby Installed Generating a New Rails App Without Ruby Installed Quick Recap

Chapter 2: Running a Rails App in a Container

How Do We Run Our Rails App? Defining Our Fi rst Custom Image Building Our Image Running a Rails Server with Our Image Reaching the App: Publishing Ports Binding the Rails Serve r to IP Addresses Quick Recap

Chapter 3: Fine-Tuning Our Rails Image

Naming and Versioning O ur Image A Default Command Ignoring Unnecessary Files The Image Build Cache Caching Issue 1: Updating Packages Cachin g Issue 2: Unnecessary Gem Installs The Finishing Touch Quick Recap

Chapter 4: Describing Our App Declaratively with Docker Compose

Getting Started with Compose Launching Our App Mounting a Local Volume Starting and Stopping Services Other Common Tasks Quick Recap

Chapter 5: Beyond the App: Adding Redis

Starting a Redis Server Manually Connecting to the Redis Server How Containers Can Talk to Each Other Our Rails App Talking to Redis Starting the Entire App with Docker Compose Quick Recap

Chapter 6: Adding a Database: Postgres

Starting a Postgres Server Connecting to Postgres from a Separate Contai ner Connecting Our Rails App to Postgres Using the Database in Practice Decoupling Data from the Container Quick Recap

Chapter 7: Playing Nice with JavaScript

The JavaScript Front-End Options Rails JavaScript Front End with Webpacker Compiling Assets with Webpacker A Hello World React App Quick Recap

Chapter 8: Testing in a Dockerized Environment

Setting Up RSpec Our First Test Setting Up Rails System Tests Running Tests That Rely on JavaScript Debugging Quick Recap

Chapter 9: Advanced Gem Management

The Downside to Our Existing Approach Using a Gem Cache Volume Quick Recap

Chapter 10: Some Minor Irritations

Rails tmp/pids/server.pid Not Cleaned Up Compose Intermittently Aborts with Ctrl-C Quick Recap Closing Thoughts on Docker in Development

Part 2: Toward Production

Chapter 11: The Production Landscape

The “Ops” in DevOps Container Orchestration A Tale of Two Orchestrators: Swarm and Kubernetes IaaS vs. CaaS Provisioning Your Infrastructure CaaS Platforms Serverless for Containers How to Decide What’s Right for Me? Quick Recap

Chapter 12: Preparing for Production

Configuring a Production Environment A Production Image: Precompiling Assets Sharing Images Quick Recap

Chapter 13: A Production-Like Playground

Creating Machines Introducing Docker Swarm Our First (Single Node) Swarm Describing Our App to Swarm Migrating the Database Deploying Our App on a Swarm Tasks and Swarm’s Scaling Model Scaling Up the Service Quick Recap

Chapter 14: Deploying to the Cloud

Creating a DigitalOcean Cluster Deploying to Our DigitalOcean Swarm Visualizing Containers Scale Up the Web Service De ploying to AWS Instead of DigitalOcean Quick Recap

Chapter 15: Closing Thoughts and Next Steps

What Should I Learn About Next?

Appendix 1: Platform Differences

File Ownership and Permissions

Appendix 2: Finding Images to Use

Using Docker Hub Using the Docker CLI You May Be Interested In…